bd8b4f7f1e
Roll in the ORTE state machine. Remove last traces of opal_sos. Remove UTK epoch code. Please see the various emails about the state machine change for details. I'll send something out later with more info on the new arch. This commit was SVN r26242.
916 строки
32 KiB
C
916 строки
32 KiB
C
/*
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* Copyright (c) 2004-2007 The Trustees of Indiana University and Indiana
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* University Research and Technology
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* Corporation. All rights reserved.
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* Copyright (c) 2004-2008 The University of Tennessee and The University
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* of Tennessee Research Foundation. All rights
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* reserved.
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* Copyright (c) 2004-2005 High Performance Computing Center Stuttgart,
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* University of Stuttgart. All rights reserved.
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* Copyright (c) 2004-2005 The Regents of the University of California.
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* All rights reserved.
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* Copyright (c) 2007-2010 Oracle and/or its affiliates. All rights reserved.
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* Copyright (c) 2007 Evergrid, Inc. All rights reserved.
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* Copyright (c) 2008-2011 Cisco Systems, Inc. All rights reserved.
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* Copyright (c) 2010 IBM Corporation. All rights reserved.
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* Copyright (c) 2011-2012 Los Alamos National Security, LLC. All rights
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* reserved.
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*
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* $COPYRIGHT$
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*
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* Additional copyrights may follow
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*
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* $HEADER$
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*/
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/*
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* There is a complicated sequence of events that occurs when the
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* parent forks a child process that is intended to launch the target
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* executable.
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*
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* Before the child process exec's the target executable, it might tri
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* to set the affinity of that new child process according to a
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* complex series of rules. This binding may fail in a myriad of
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* different ways. A lot of this code deals with reporting that error
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* occurately to the end user. This is a complex task in itself
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* because the child process is not "really" an ORTE process -- all
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* error reporting must be proxied up to the parent who can use normal
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* ORTE error reporting mechanisms.
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*
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* Here's a high-level description of what is occurring in this file:
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*
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* - parent opens a pipe
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* - parent forks a child
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* - parent blocks reading on the pipe: the pipe will either close
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* (indicating that the child successfully exec'ed) or the child will
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* write some proxied error data up the pipe
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*
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* - the child tries to set affinity and do other housekeeping in
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* preparation of exec'ing the target executable
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* - if the child fails anywhere along the way, it sends a message up
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* the pipe to the parent indicating what happened -- including a
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* rendered error message detailing the problem (i.e., human-readable).
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* - it is important that the child renders the error message: there
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* are so many errors that are possible that the child is really the
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* only entity that has enough information to make an accuate error string
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* to report back to the user.
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* - the parent reads this message + rendered string in and uses ORTE
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* reporting mechanisms to display it to the user
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* - if the problem was only a warning, the child continues processing
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* (potentially eventually exec'ing the target executable).
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* - if the problem was an error, the child exits and the parent
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* handles the death of the child as appropriate (i.e., this ODLS
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* simply reports the error -- other things decide what to do).
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*/
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#include "orte_config.h"
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#include "orte/constants.h"
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#include "orte/types.h"
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#ifdef HAVE_STRING_H
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#include <string.h>
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#endif
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#include <stdlib.h>
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#include <errno.h>
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#ifdef HAVE_SYS_TYPES_H
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#include <sys/types.h>
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#endif
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#ifdef HAVE_SYS_WAIT_H
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#include <sys/wait.h>
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#endif
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#include <signal.h>
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#ifdef HAVE_FCNTL_H
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#include <fcntl.h>
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#endif
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#ifdef HAVE_SYS_TIME_H
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#include <sys/time.h>
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#endif
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#ifdef HAVE_SYS_PARAM_H
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#include <sys/param.h>
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#endif
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#ifdef HAVE_NETDB_H
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#include <netdb.h>
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#endif
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#ifdef HAVE_STDLIB_H
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#include <stdlib.h>
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#endif
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#ifdef HAVE_SYS_STAT_H
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#include <sys/stat.h>
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#endif /* HAVE_SYS_STAT_H */
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#ifdef HAVE_STDARG_H
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#include <stdarg.h>
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#endif
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#ifdef HAVE_SYS_SELECT_H
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#include <sys/select.h>
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#endif
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#include "opal/mca/hwloc/hwloc.h"
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#include "opal/mca/hwloc/base/base.h"
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#include "opal/mca/maffinity/base/base.h"
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#include "opal/class/opal_pointer_array.h"
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#include "opal/util/opal_environ.h"
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#include "opal/util/show_help.h"
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#include "opal/util/fd.h"
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#include "orte/util/show_help.h"
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#include "orte/runtime/orte_wait.h"
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#include "orte/runtime/orte_globals.h"
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#include "orte/mca/errmgr/errmgr.h"
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#include "orte/mca/ess/ess.h"
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#include "orte/mca/iof/base/iof_base_setup.h"
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#include "orte/mca/plm/plm.h"
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#include "orte/util/name_fns.h"
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#include "orte/mca/odls/base/base.h"
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#include "orte/mca/odls/base/odls_private.h"
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#include "orte/mca/odls/default/odls_default.h"
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/*
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* Struct written up the pipe from the child to the parent.
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*/
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typedef struct {
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/* True if the child has died; false if this is just a warning to
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be printed. */
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bool fatal;
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/* Relevant only if fatal==true */
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int exit_status;
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/* Length of the strings that are written up the pipe after this
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struct */
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int file_str_len;
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int topic_str_len;
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int msg_str_len;
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} pipe_err_msg_t;
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/*
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* Max length of strings from the pipe_err_msg_t
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*/
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#define MAX_FILE_LEN 511
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#define MAX_TOPIC_LEN MAX_FILE_LEN
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/*
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* Module functions (function pointers used in a struct)
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*/
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static int orte_odls_default_launch_local_procs(opal_buffer_t *data);
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static int orte_odls_default_kill_local_procs(opal_pointer_array_t *procs);
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static int orte_odls_default_signal_local_procs(const orte_process_name_t *proc, int32_t signal);
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static int orte_odls_default_restart_proc(orte_proc_t *child);
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/*
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* Explicitly declared functions so that we can get the noreturn
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* attribute registered with the compiler.
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*/
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static void send_error_show_help(int fd, int exit_status,
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const char *file, const char *topic, ...)
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__opal_attribute_noreturn__;
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static int do_child(orte_app_context_t* context,
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orte_proc_t *child,
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char **environ_copy,
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orte_job_t *jobdat, int write_fd,
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orte_iof_base_io_conf_t opts)
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__opal_attribute_noreturn__;
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/*
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* Module
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*/
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orte_odls_base_module_t orte_odls_default_module = {
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orte_odls_base_default_get_add_procs_data,
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orte_odls_default_launch_local_procs,
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orte_odls_default_kill_local_procs,
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orte_odls_default_signal_local_procs,
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orte_odls_base_default_deliver_message,
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orte_odls_base_default_require_sync,
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orte_odls_default_restart_proc
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};
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static bool odls_default_child_died(orte_proc_t *child)
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{
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time_t end;
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pid_t ret;
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/* Because of rounding in time (which returns whole seconds) we
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* have to add 1 to our wait number: this means that we wait
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* somewhere between (target) and (target)+1 seconds. Otherwise,
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* the default 1s actually means 'somwhere between 0 and 1s'. */
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end = time(NULL) + orte_odls_globals.timeout_before_sigkill + 1;
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do {
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ret = waitpid(child->pid, &child->exit_code, WNOHANG);
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if (child->pid == ret) {
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OPAL_OUTPUT_VERBOSE((2, orte_odls_globals.output,
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"%s odls:default:WAITPID INDICATES PROC %d IS DEAD",
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ORTE_NAME_PRINT(ORTE_PROC_MY_NAME), (int)(child->pid)));
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/* It died -- return success */
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return true;
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} else if (0 == ret) {
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/* with NOHANG specified, if a process has already exited
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* while waitpid was registered, then waitpid returns 0
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* as there is no error - this is a race condition problem
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* that occasionally causes us to incorrectly report a proc
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* as refusing to die. Unfortunately, errno may not be reset
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* by waitpid in this case, so we cannot check it.
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*
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* (note the previous fix to this, to return 'process dead'
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* here, fixes the race condition at the cost of reporting
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* all live processes have immediately died! Better to
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* occasionally report a dead process as still living -
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* which will occasionally trip the timeout for cases that
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* are right on the edge.)
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*/
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/* Do nothing, process still alive */
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} else if (-1 == ret && ECHILD == errno) {
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/* The pid no longer exists, so we'll call this "good
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enough for government work" */
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OPAL_OUTPUT_VERBOSE((2, orte_odls_globals.output,
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"%s odls:default:WAITPID INDICATES PID %d NO LONGER EXISTS",
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ORTE_NAME_PRINT(ORTE_PROC_MY_NAME), (int)(child->pid)));
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return true;
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}
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/* Bogus delay for 1 msec - let's actually give the CPU some time
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* to quit the other process (sched_yield() -- even if we have it
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* -- changed behavior in 2.6.3x Linux flavors to be undesirable)
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* Don't use select on a bogus file descriptor here as it has proven
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* unreliable and sometimes immediately returns - we really, really
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* -do- want to wait a bit!
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*/
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usleep(1000);
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} while (time(NULL) < end);
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/* The child didn't die, so return false */
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return false;
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}
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static int odls_default_kill_local(pid_t pid, int signum)
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{
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if (orte_forward_job_control) {
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pid = -pid;
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}
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if (0 != kill(pid, signum)) {
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if (ESRCH != errno) {
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OPAL_OUTPUT_VERBOSE((2, orte_odls_globals.output,
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"%s odls:default:SENT KILL %d TO PID %d GOT ERRNO %d",
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ORTE_NAME_PRINT(ORTE_PROC_MY_NAME), signum, (int)pid, errno));
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return errno;
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}
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}
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OPAL_OUTPUT_VERBOSE((2, orte_odls_globals.output,
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"%s odls:default:SENT KILL %d TO PID %d SUCCESS",
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ORTE_NAME_PRINT(ORTE_PROC_MY_NAME), signum, (int)pid));
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return 0;
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}
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int orte_odls_default_kill_local_procs(opal_pointer_array_t *procs)
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{
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int rc;
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if (ORTE_SUCCESS != (rc = orte_odls_base_default_kill_local_procs(procs,
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odls_default_kill_local, odls_default_child_died))) {
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ORTE_ERROR_LOG(rc);
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return rc;
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}
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return ORTE_SUCCESS;
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}
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static void set_handler_default(int sig)
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{
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struct sigaction act;
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act.sa_handler = SIG_DFL;
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act.sa_flags = 0;
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sigemptyset(&act.sa_mask);
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sigaction(sig, &act, (struct sigaction *)0);
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}
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/*
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* Internal function to write a rendered show_help message back up the
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* pipe to the waiting parent.
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*/
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static int write_help_msg(int fd, pipe_err_msg_t *msg, const char *file,
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const char *topic, va_list ap)
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{
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int ret;
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char *str;
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if (NULL == file || NULL == topic) {
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return OPAL_ERR_BAD_PARAM;
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}
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str = opal_show_help_vstring(file, topic, true, ap);
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msg->file_str_len = (int) strlen(file);
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if (msg->file_str_len > MAX_FILE_LEN) {
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ORTE_ERROR_LOG(ORTE_ERR_BAD_PARAM);
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return ORTE_ERR_BAD_PARAM;
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}
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msg->topic_str_len = (int) strlen(topic);
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if (msg->topic_str_len > MAX_TOPIC_LEN) {
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ORTE_ERROR_LOG(ORTE_ERR_BAD_PARAM);
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return ORTE_ERR_BAD_PARAM;
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}
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msg->msg_str_len = (int) strlen(str);
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/* Only keep writing if each write() succeeds */
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if (OPAL_SUCCESS != (ret = opal_fd_write(fd, sizeof(*msg), msg))) {
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goto out;
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}
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if (msg->file_str_len > 0 &&
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OPAL_SUCCESS != (ret = opal_fd_write(fd, msg->file_str_len, file))) {
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goto out;
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}
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if (msg->topic_str_len > 0 &&
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OPAL_SUCCESS != (ret = opal_fd_write(fd, msg->topic_str_len, topic))) {
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goto out;
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}
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if (msg->msg_str_len > 0 &&
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OPAL_SUCCESS != (ret = opal_fd_write(fd, msg->msg_str_len, str))) {
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goto out;
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}
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out:
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free(str);
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return ret;
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}
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/* Called from the child to send a warning show_help message up the
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pipe to the waiting parent. */
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#if OPAL_HAVE_HWLOC
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static int send_warn_show_help(int fd, const char *file,
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const char *topic, ...)
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{
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int ret;
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va_list ap;
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pipe_err_msg_t msg;
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msg.fatal = false;
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msg.exit_status = 0; /* ignored */
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/* Send it */
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va_start(ap, topic);
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ret = write_help_msg(fd, &msg, file, topic, ap);
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va_end(ap);
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return ret;
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}
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#endif
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/* Called from the child to send an error message up the pipe to the
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waiting parent. */
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static void send_error_show_help(int fd, int exit_status,
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const char *file, const char *topic, ...)
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{
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int ret;
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va_list ap;
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pipe_err_msg_t msg;
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msg.fatal = true;
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msg.exit_status = exit_status;
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/* Send it */
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va_start(ap, topic);
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ret = write_help_msg(fd, &msg, file, topic, ap);
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va_end(ap);
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exit(exit_status);
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}
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static int do_child(orte_app_context_t* context,
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orte_proc_t *child,
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char **environ_copy,
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orte_job_t *jobdat, int write_fd,
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orte_iof_base_io_conf_t opts)
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{
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int i;
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sigset_t sigs;
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long fd, fdmax = sysconf(_SC_OPEN_MAX);
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#if OPAL_HAVE_HWLOC
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int rc;
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char *param, *msg;
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#endif
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if (orte_forward_job_control) {
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/* Set a new process group for this child, so that a
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SIGSTOP can be sent to it without being sent to the
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orted. */
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setpgid(0, 0);
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}
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/* Setup the pipe to be close-on-exec */
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fcntl(write_fd, F_SETFD, FD_CLOEXEC);
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if (NULL != child) {
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/* setup stdout/stderr so that any error messages that we
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may print out will get displayed back at orterun.
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NOTE: Definitely do this AFTER we check contexts so
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that any error message from those two functions doesn't
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come out to the user. IF we didn't do it in this order,
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THEN a user who gives us a bad executable name or
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working directory would get N error messages, where
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N=num_procs. This would be very annoying for large
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jobs, so instead we set things up so that orterun
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always outputs a nice, single message indicating what
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happened
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*/
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if (ORTE_SUCCESS != (i = orte_iof_base_setup_child(&opts,
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&environ_copy))) {
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ORTE_ERROR_LOG(i);
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send_error_show_help(write_fd, 1,
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"help-orte-odls-default.txt",
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"iof setup failed",
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orte_process_info.nodename, context->app);
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/* Does not return */
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}
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#if OPAL_HAVE_HWLOC
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{
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hwloc_cpuset_t cpuset;
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/* Set process affinity, if given */
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if (NULL != child->cpu_bitmap) {
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/* convert the list to a cpu bitmap */
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cpuset = hwloc_bitmap_alloc();
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if (0 != (rc = hwloc_bitmap_list_sscanf(cpuset, child->cpu_bitmap))) {
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/* See comment above about "This may be a small memory leak" */
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asprintf(&msg, "hwloc_bitmap_sscanf returned \"%s\" for the string \"%s\"",
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opal_strerror(rc), child->cpu_bitmap);
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if (NULL == msg) {
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msg = "failed to convert bitmap list to hwloc bitmap";
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}
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if (OPAL_BINDING_REQUIRED(jobdat->map->binding)) {
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/* If binding is required, send an error up the pipe (which exits
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-- it doesn't return). */
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send_error_show_help(write_fd, 1, "help-orte-odls-default.txt",
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"binding generic error",
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orte_process_info.nodename,
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context->app, msg,
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__FILE__, __LINE__);
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} else {
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send_warn_show_help(write_fd,
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"help-orte-odls-default.txt", "not bound",
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orte_process_info.nodename, context->app, msg,
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__FILE__, __LINE__);
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goto PROCEED;
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}
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}
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/* bind as specified */
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if (opal_hwloc_report_bindings) {
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opal_output(0, "%s odls:default binding child %s to cpus %s",
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ORTE_NAME_PRINT(ORTE_PROC_MY_NAME),
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ORTE_NAME_PRINT(&child->name), child->cpu_bitmap);
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}
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rc = hwloc_set_cpubind(opal_hwloc_topology, cpuset, 0);
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if (rc < 0) {
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char *tmp = NULL;
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if (errno == ENOSYS) {
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msg = "hwloc indicates cpu binding not supported";
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} else if (errno == EXDEV) {
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msg = "hwloc indicates cpu binding cannot be enforced";
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} else {
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asprintf(&msg, "hwloc_set_cpubind returned \"%s\" for bitmap \"%s\"",
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opal_strerror(rc), child->cpu_bitmap);
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}
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|
if (OPAL_BINDING_REQUIRED(jobdat->map->binding)) {
|
|
/* If binding is required, send an error up the pipe (which exits
|
|
-- it doesn't return). */
|
|
send_error_show_help(write_fd, 1, "help-orte-odls-default.txt",
|
|
"binding generic error",
|
|
orte_process_info.nodename, context->app, msg,
|
|
__FILE__, __LINE__);
|
|
} else {
|
|
send_warn_show_help(write_fd,
|
|
"help-orte-odls-default.txt", "not bound",
|
|
orte_process_info.nodename, context->app, msg,
|
|
__FILE__, __LINE__);
|
|
if (NULL != tmp) {
|
|
free(tmp);
|
|
free(msg);
|
|
}
|
|
goto PROCEED;
|
|
}
|
|
if (NULL != tmp) {
|
|
free(tmp);
|
|
free(msg);
|
|
}
|
|
}
|
|
/* set memory affinity policy */
|
|
if (ORTE_SUCCESS != opal_hwloc_base_set_process_membind_policy()) {
|
|
if (errno == ENOSYS) {
|
|
msg = "hwloc indicates memory binding not supported";
|
|
} else if (errno == EXDEV) {
|
|
msg = "hwloc indicates memory binding cannot be enforced";
|
|
} else {
|
|
msg = "failed to bind memory";
|
|
}
|
|
if (OPAL_HWLOC_BASE_MBFA_ERROR == opal_hwloc_base_mbfa) {
|
|
/* If binding is required, send an error up the pipe (which exits
|
|
-- it doesn't return). */
|
|
send_error_show_help(write_fd, 1, "help-orte-odls-default.txt",
|
|
"memory binding error",
|
|
orte_process_info.nodename, context->app, msg,
|
|
__FILE__, __LINE__);
|
|
} else {
|
|
send_warn_show_help(write_fd,
|
|
"help-orte-odls-default.txt", "memory not bound",
|
|
orte_process_info.nodename, context->app, msg,
|
|
__FILE__, __LINE__);
|
|
goto PROCEED;
|
|
}
|
|
}
|
|
opal_maffinity_setup = true;
|
|
/* Set an info MCA param that tells
|
|
the launched processes that it was bound by us (e.g., so that
|
|
MPI_INIT doesn't try to bind itself) */
|
|
param = mca_base_param_environ_variable("opal","bound","at_launch");
|
|
opal_setenv(param, "1", true, &environ_copy);
|
|
free(param);
|
|
/* ...and provide a nice string representation of what we
|
|
bound to */
|
|
param = mca_base_param_environ_variable("opal","base","applied_binding");
|
|
opal_setenv(param, child->cpu_bitmap, true, &environ_copy);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
} else if (!(ORTE_JOB_CONTROL_FORWARD_OUTPUT & jobdat->controls)) {
|
|
/* tie stdin/out/err/internal to /dev/null */
|
|
int fdnull;
|
|
for (i=0; i < 3; i++) {
|
|
fdnull = open("/dev/null", O_RDONLY, 0);
|
|
if (fdnull > i && i != write_fd) {
|
|
dup2(fdnull, i);
|
|
}
|
|
close(fdnull);
|
|
}
|
|
fdnull = open("/dev/null", O_RDONLY, 0);
|
|
if (fdnull > opts.p_internal[1]) {
|
|
dup2(fdnull, opts.p_internal[1]);
|
|
}
|
|
close(fdnull);
|
|
}
|
|
|
|
#if OPAL_HAVE_HWLOC
|
|
PROCEED:
|
|
#endif
|
|
/* close all file descriptors w/ exception of stdin/stdout/stderr,
|
|
the pipe used for the IOF INTERNAL messages, and the pipe up to
|
|
the parent. */
|
|
for(fd=3; fd<fdmax; fd++) {
|
|
if (fd != opts.p_internal[1] && fd != write_fd) {
|
|
close(fd);
|
|
}
|
|
}
|
|
|
|
if (context->argv == NULL) {
|
|
context->argv = malloc(sizeof(char*)*2);
|
|
context->argv[0] = strdup(context->app);
|
|
context->argv[1] = NULL;
|
|
}
|
|
|
|
/* Set signal handlers back to the default. Do this close to
|
|
the exev() because the event library may (and likely will)
|
|
reset them. If we don't do this, the event library may
|
|
have left some set that, at least on some OS's, don't get
|
|
reset via fork() or exec(). Hence, the launched process
|
|
could be unkillable (for example). */
|
|
|
|
set_handler_default(SIGTERM);
|
|
set_handler_default(SIGINT);
|
|
set_handler_default(SIGHUP);
|
|
set_handler_default(SIGPIPE);
|
|
set_handler_default(SIGCHLD);
|
|
|
|
/* Unblock all signals, for many of the same reasons that we
|
|
set the default handlers, above. This is noticable on
|
|
Linux where the event library blocks SIGTERM, but we don't
|
|
want that blocked by the launched process. */
|
|
sigprocmask(0, 0, &sigs);
|
|
sigprocmask(SIG_UNBLOCK, &sigs, 0);
|
|
|
|
/* Exec the new executable */
|
|
|
|
if (10 < opal_output_get_verbosity(orte_odls_globals.output)) {
|
|
int jout;
|
|
opal_output(0, "%s STARTING %s", ORTE_NAME_PRINT(ORTE_PROC_MY_NAME), context->app);
|
|
for (jout=0; NULL != context->argv[jout]; jout++) {
|
|
opal_output(0, "%s\tARGV[%d]: %s", ORTE_NAME_PRINT(ORTE_PROC_MY_NAME), jout, context->argv[jout]);
|
|
}
|
|
for (jout=0; NULL != environ_copy[jout]; jout++) {
|
|
opal_output(0, "%s\tENVIRON[%d]: %s", ORTE_NAME_PRINT(ORTE_PROC_MY_NAME), jout, environ_copy[jout]);
|
|
}
|
|
}
|
|
|
|
execve(context->app, context->argv, environ_copy);
|
|
send_error_show_help(write_fd, 1,
|
|
"help-orte-odls-default.txt", "execve error",
|
|
context->app, strerror(errno));
|
|
/* Does not return */
|
|
}
|
|
|
|
|
|
static int do_parent(orte_app_context_t* context,
|
|
orte_proc_t *child,
|
|
char **environ_copy,
|
|
orte_job_t *jobdat, int read_fd,
|
|
orte_iof_base_io_conf_t opts)
|
|
{
|
|
int rc;
|
|
pipe_err_msg_t msg;
|
|
char file[MAX_FILE_LEN + 1], topic[MAX_TOPIC_LEN + 1], *str = NULL;
|
|
|
|
if (NULL != child && (ORTE_JOB_CONTROL_FORWARD_OUTPUT & jobdat->controls)) {
|
|
/* connect endpoints IOF */
|
|
rc = orte_iof_base_setup_parent(&child->name, &opts);
|
|
if (ORTE_SUCCESS != rc) {
|
|
ORTE_ERROR_LOG(rc);
|
|
close(read_fd);
|
|
|
|
if (NULL != child) {
|
|
child->state = ORTE_PROC_STATE_UNDEF;
|
|
}
|
|
return rc;
|
|
}
|
|
}
|
|
|
|
/* Block reading a message from the pipe */
|
|
while (1) {
|
|
rc = opal_fd_read(read_fd, sizeof(msg), &msg);
|
|
|
|
/* If the pipe closed, then the child successfully launched */
|
|
if (OPAL_ERR_TIMEOUT == rc) {
|
|
break;
|
|
}
|
|
|
|
/* If Something Bad happened in the read, error out */
|
|
if (OPAL_SUCCESS != rc) {
|
|
ORTE_ERROR_LOG(rc);
|
|
close(read_fd);
|
|
|
|
if (NULL != child) {
|
|
child->state = ORTE_PROC_STATE_UNDEF;
|
|
}
|
|
return rc;
|
|
}
|
|
|
|
/* Otherwise, we got a warning or error message from the child */
|
|
if (NULL != child) {
|
|
child->alive = msg.fatal ? 0 : 1;
|
|
}
|
|
|
|
/* Read in the strings; ensure to terminate them with \0 */
|
|
if (msg.file_str_len > 0) {
|
|
rc = opal_fd_read(read_fd, msg.file_str_len, file);
|
|
if (OPAL_SUCCESS != rc) {
|
|
orte_show_help("help-orte-odls-default.txt", "syscall fail",
|
|
true,
|
|
orte_process_info.nodename, context->app,
|
|
"opal_fd_read", __FILE__, __LINE__);
|
|
if (NULL != child) {
|
|
child->state = ORTE_PROC_STATE_UNDEF;
|
|
}
|
|
return rc;
|
|
}
|
|
file[msg.file_str_len] = '\0';
|
|
}
|
|
if (msg.topic_str_len > 0) {
|
|
rc = opal_fd_read(read_fd, msg.topic_str_len, topic);
|
|
if (OPAL_SUCCESS != rc) {
|
|
orte_show_help("help-orte-odls-default.txt", "syscall fail",
|
|
true,
|
|
orte_process_info.nodename, context->app,
|
|
"opal_fd_read", __FILE__, __LINE__);
|
|
if (NULL != child) {
|
|
child->state = ORTE_PROC_STATE_UNDEF;
|
|
}
|
|
return rc;
|
|
}
|
|
topic[msg.topic_str_len] = '\0';
|
|
}
|
|
if (msg.msg_str_len > 0) {
|
|
str = calloc(1, msg.msg_str_len + 1);
|
|
if (NULL == str) {
|
|
orte_show_help("help-orte-odls-default.txt", "syscall fail",
|
|
true,
|
|
orte_process_info.nodename, context->app,
|
|
"opal_fd_read", __FILE__, __LINE__);
|
|
if (NULL != child) {
|
|
child->state = ORTE_PROC_STATE_UNDEF;
|
|
}
|
|
return rc;
|
|
}
|
|
rc = opal_fd_read(read_fd, msg.msg_str_len, str);
|
|
}
|
|
|
|
/* Print out what we got. We already have a rendered string,
|
|
so use orte_show_help_norender(). */
|
|
if (msg.msg_str_len > 0) {
|
|
orte_show_help_norender(file, topic, false, str);
|
|
free(str);
|
|
str = NULL;
|
|
}
|
|
|
|
/* If msg.fatal is true, then the child exited with an error.
|
|
Otherwise, whatever we just printed was a warning, so loop
|
|
around and see what else is on the pipe (or if the pipe
|
|
closed, indicating that the child launched
|
|
successfully). */
|
|
if (msg.fatal) {
|
|
if (NULL != child) {
|
|
child->state = ORTE_PROC_STATE_FAILED_TO_START;
|
|
child->alive = false;
|
|
}
|
|
close(read_fd);
|
|
return ORTE_ERR_FAILED_TO_START;
|
|
}
|
|
}
|
|
|
|
/* If we got here, it means that the pipe closed without
|
|
indication of a fatal error, meaning that the child process
|
|
launched successfully. */
|
|
if (NULL != child) {
|
|
child->state = ORTE_PROC_STATE_RUNNING;
|
|
child->alive = true;
|
|
}
|
|
close(read_fd);
|
|
|
|
return ORTE_SUCCESS;
|
|
}
|
|
|
|
|
|
/**
|
|
* Fork/exec the specified processes
|
|
*/
|
|
static int odls_default_fork_local_proc(orte_app_context_t* context,
|
|
orte_proc_t *child,
|
|
char **environ_copy,
|
|
orte_job_t *jobdat)
|
|
{
|
|
orte_iof_base_io_conf_t opts;
|
|
int rc, p[2];
|
|
pid_t pid;
|
|
|
|
if (NULL != child) {
|
|
/* should pull this information from MPIRUN instead of going with
|
|
default */
|
|
opts.usepty = OPAL_ENABLE_PTY_SUPPORT;
|
|
|
|
/* do we want to setup stdin? */
|
|
if (NULL != child &&
|
|
(jobdat->stdin_target == ORTE_VPID_WILDCARD ||
|
|
child->name.vpid == jobdat->stdin_target)) {
|
|
opts.connect_stdin = true;
|
|
} else {
|
|
opts.connect_stdin = false;
|
|
}
|
|
|
|
if (ORTE_SUCCESS != (rc = orte_iof_base_setup_prefork(&opts))) {
|
|
ORTE_ERROR_LOG(rc);
|
|
if (NULL != child) {
|
|
child->state = ORTE_PROC_STATE_FAILED_TO_START;
|
|
child->exit_code = rc;
|
|
}
|
|
return rc;
|
|
}
|
|
}
|
|
|
|
/* A pipe is used to communicate between the parent and child to
|
|
indicate whether the exec ultimately succeeded or failed. The
|
|
child sets the pipe to be close-on-exec; the child only ever
|
|
writes anything to the pipe if there is an error (e.g.,
|
|
executable not found, exec() fails, etc.). The parent does a
|
|
blocking read on the pipe; if the pipe closed with no data,
|
|
then the exec() succeeded. If the parent reads something from
|
|
the pipe, then the child was letting us know why it failed. */
|
|
if (pipe(p) < 0) {
|
|
ORTE_ERROR_LOG(ORTE_ERR_SYS_LIMITS_PIPES);
|
|
if (NULL != child) {
|
|
child->state = ORTE_PROC_STATE_FAILED_TO_START;
|
|
child->exit_code = ORTE_ERR_SYS_LIMITS_PIPES;
|
|
}
|
|
return ORTE_ERR_SYS_LIMITS_PIPES;
|
|
}
|
|
|
|
/* Fork off the child */
|
|
pid = fork();
|
|
if (NULL != child) {
|
|
child->pid = pid;
|
|
}
|
|
|
|
if (pid < 0) {
|
|
ORTE_ERROR_LOG(ORTE_ERR_SYS_LIMITS_CHILDREN);
|
|
if (NULL != child) {
|
|
child->state = ORTE_PROC_STATE_FAILED_TO_START;
|
|
child->exit_code = ORTE_ERR_SYS_LIMITS_CHILDREN;
|
|
}
|
|
return ORTE_ERR_SYS_LIMITS_CHILDREN;
|
|
}
|
|
|
|
if (pid == 0) {
|
|
close(p[0]);
|
|
do_child(context, child, environ_copy, jobdat, p[1], opts);
|
|
/* Does not return */
|
|
}
|
|
|
|
close(p[1]);
|
|
return do_parent(context, child, environ_copy, jobdat, p[0], opts);
|
|
}
|
|
|
|
|
|
/**
|
|
* Launch all processes allocated to the current node.
|
|
*/
|
|
|
|
int orte_odls_default_launch_local_procs(opal_buffer_t *data)
|
|
{
|
|
int rc;
|
|
orte_jobid_t job;
|
|
|
|
/* construct the list of children we are to launch */
|
|
if (ORTE_SUCCESS != (rc = orte_odls_base_default_construct_child_list(data, &job))) {
|
|
OPAL_OUTPUT_VERBOSE((2, orte_odls_globals.output,
|
|
"%s odls:default:launch:local failed to construct child list on error %s",
|
|
ORTE_NAME_PRINT(ORTE_PROC_MY_NAME), ORTE_ERROR_NAME(rc)));
|
|
return rc;
|
|
}
|
|
|
|
/* launch the local procs */
|
|
ORTE_ACTIVATE_LOCAL_LAUNCH(job, odls_default_fork_local_proc);
|
|
|
|
return ORTE_SUCCESS;
|
|
}
|
|
|
|
|
|
/**
|
|
* Send a signal to a pid. Note that if we get an error, we set the
|
|
* return value and let the upper layer print out the message.
|
|
*/
|
|
static int send_signal(pid_t pid, int signal)
|
|
{
|
|
int rc = ORTE_SUCCESS;
|
|
|
|
OPAL_OUTPUT_VERBOSE((1, orte_odls_globals.output,
|
|
"%s sending signal %d to pid %ld",
|
|
ORTE_NAME_PRINT(ORTE_PROC_MY_NAME),
|
|
signal, (long)pid));
|
|
|
|
if (orte_forward_job_control) {
|
|
/* Send the signal to the process group rather than the
|
|
process. The child is the leader of its process group. */
|
|
pid = -pid;
|
|
}
|
|
if (kill(pid, signal) != 0) {
|
|
switch(errno) {
|
|
case EINVAL:
|
|
rc = ORTE_ERR_BAD_PARAM;
|
|
break;
|
|
case ESRCH:
|
|
/* This case can occur when we deliver a signal to a
|
|
process that is no longer there. This can happen if
|
|
we deliver a signal while the job is shutting down.
|
|
This does not indicate a real problem, so just
|
|
ignore the error. */
|
|
break;
|
|
case EPERM:
|
|
rc = ORTE_ERR_PERM;
|
|
break;
|
|
default:
|
|
rc = ORTE_ERROR;
|
|
}
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
static int orte_odls_default_signal_local_procs(const orte_process_name_t *proc, int32_t signal)
|
|
{
|
|
int rc;
|
|
|
|
if (ORTE_SUCCESS != (rc = orte_odls_base_default_signal_local_procs(proc, signal, send_signal))) {
|
|
ORTE_ERROR_LOG(rc);
|
|
return rc;
|
|
}
|
|
return ORTE_SUCCESS;
|
|
}
|
|
|
|
static int orte_odls_default_restart_proc(orte_proc_t *child)
|
|
{
|
|
int rc;
|
|
|
|
/* restart the local proc */
|
|
if (ORTE_SUCCESS != (rc = orte_odls_base_default_restart_proc(child, odls_default_fork_local_proc))) {
|
|
OPAL_OUTPUT_VERBOSE((2, orte_odls_globals.output,
|
|
"%s odls:default:restart_proc failed to launch on error %s",
|
|
ORTE_NAME_PRINT(ORTE_PROC_MY_NAME), ORTE_ERROR_NAME(rc)));
|
|
}
|
|
return rc;
|
|
}
|
|
|