7437f37e96
* Fix some missing includes in a few places. * Add the cr_request() functionality to the BLCR CRS component. We are now dependent upon the 0.6.* series of BLCR. * Made the CR notification mechanism a registered function. This way we can have an OPAL-only version and it can be replaced at runtime with the ORTE version. * Add a 'opal_cr_allow_opal_only' parameter that will enable OPAL-only CR functionality when the user wants it. Default: Disabled. * Fix the placement of a checkpoint request check in MPI_Init * Pull the OPAL notification mechanism into the SnapC framework. * We no longer fork/exec the 'opal-checkpoint' command for local checkpointing, the Local coordinator in the orted does this directly. * The Local and Application coordinator talk together bypassing the OPAL notifiation mechanism. * Optimized the Local <-> App Coordinator communication. * Improved the structure used to track vpid_snapshots in the local coord. * Fix a race condition in which an application under heavy communication load may produce an inconsistent global checkpoint. This commit was SVN r16389.
219 строки
7.4 KiB
C
219 строки
7.4 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) 2004-2005 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) 2004-2007 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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* $COPYRIGHT$
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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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* @file
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*
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* Checkpoint functionality for Open MPI
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*/
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#include "opal/mca/crs/crs.h"
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#include "opal/threads/mutex.h"
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#include "opal/threads/threads.h"
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#include "opal/threads/condition.h"
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#include "opal/event/event.h"
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#include "opal/runtime/opal_progress.h"
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#include "opal/util/output.h"
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#include "opal/prefetch.h"
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#ifndef OPAL_CR_H
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#define OPAL_CR_H
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#if defined(c_plusplus) || defined(__cplusplus)
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extern "C" {
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#endif
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/*
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* Some defines shared with opal-[checkpoint|restart] commands
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*/
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#define OPAL_CR_DONE ((char) 0)
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#define OPAL_CR_ACK ((char) 1)
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#define OPAL_CR_CHECKPOINT ((char) 2)
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#define OPAL_CR_NAMED_PROG_R ("opal_cr_prog_read")
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#define OPAL_CR_NAMED_PROG_W ("opal_cr_prog_write")
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#define OPAL_CR_BASE_ENV_NAME ("opal_cr_restart-env")
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/*
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* Possible responses to a checkpoint request from opal-checkpoint
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*/
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enum opal_cr_ckpt_cmd_state_t {
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OPAL_CHECKPOINT_CMD_START, /* Checkpoint is starting on this request */
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OPAL_CHECKPOINT_CMD_IN_PROGRESS, /* Checkpoint is currently running */
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OPAL_CHECKPOINT_CMD_NULL, /* Checkpoint cannot be started because it is not supported */
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OPAL_CHECKPOINT_CMD_ERROR, /* An error occurred such that the checkpoint cannot be completed */
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/* State of the checkpoint operation */
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OPAL_CR_STATUS_NONE, /* No checkpoint in progress */
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OPAL_CR_STATUS_REQUESTED, /* Checkpoint has been requested */
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OPAL_CR_STATUS_RUNNING, /* Checkpoint is currently running */
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OPAL_CR_STATUS_TERM /* Checkpoint is running and will terminate process upon completion */
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};
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typedef enum opal_cr_ckpt_cmd_state_t opal_cr_ckpt_cmd_state_t;
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/* Directory containing the named pipes for communication
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* with the opal-checkpoint tool */
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OPAL_DECLSPEC extern char * opal_cr_pipe_dir;
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/* Signal that opal-checkpoint uses to contact the
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* application process */
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OPAL_DECLSPEC extern int opal_cr_entry_point_signal;
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/* If Checkpointing is enabled in this application */
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OPAL_DECLSPEC extern bool opal_cr_is_enabled;
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/* If the application running is a tool
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* (e.g., opal-checkpoint, orted, ...) */
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OPAL_DECLSPEC extern bool opal_cr_is_tool;
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/* An output handle to be used by the cr runtime
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* functionality as an argument to opal_output() */
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OPAL_DECLSPEC extern int opal_cr_output;
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/* If a checkpoint has been requested */
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OPAL_DECLSPEC extern int opal_cr_checkpoint_request;
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/* The current state of a checkpoint operation */
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OPAL_DECLSPEC extern int opal_cr_checkpointing;
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/*
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* If this is an application that doesn't want to have
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* a notification callback installed, set this to false.
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* To see the effect, this must be called before opal_cr_init().
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* Default: Enabled
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*/
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OPAL_DECLSPEC int opal_cr_set_enabled(bool);
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/**
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* Initialize the notification and coordination
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* elements.
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*/
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OPAL_DECLSPEC int opal_cr_init(void);
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/**
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* Finalize the notification and coordination
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* elements.
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*/
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OPAL_DECLSPEC int opal_cr_finalize(void);
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/*************************************************
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* Check to see if a checkpoint has been requested
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*
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* When the checkpoint thread is disabled:
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* This will be checked whenever the MPI Library
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* is entered by the application. It will stop
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* the application for the duration of the entire
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* checkpoint.
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* When the checkpoint thread is enabled:
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* The request is handled in the thread parallel
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* with the execution of the program regardless
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* of where the program is in exection.
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* The problem with this method is that it
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* requires the support of progress threads
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* which is currently not working properly :/
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*
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*************************************************/
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OPAL_DECLSPEC void opal_cr_test_if_checkpoint_ready(void);
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/* If the checkpoint operation should be stalled to
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* wait for another sevice to complete before
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* continuing with the checkpoint */
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OPAL_DECLSPEC extern bool opal_cr_stall_check;
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OPAL_DECLSPEC extern bool opal_cr_currently_stalled;
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/* If not using FT or using the thead, disable the process checks */
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#if OPAL_ENABLE_FT == 1 && OPAL_ENABLE_FT_THREAD == 0
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#define OPAL_CR_TEST_CHECKPOINT_READY() \
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{ \
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if(OPAL_UNLIKELY(opal_cr_is_enabled) ) { \
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opal_cr_test_if_checkpoint_ready(); \
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} \
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}
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#else
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#define OPAL_CR_TEST_CHECKPOINT_READY() ;
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#endif
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#if OPAL_ENABLE_FT == 1 && OPAL_ENABLE_FT_THREAD == 0
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#define OPAL_CR_TEST_CHECKPOINT_READY_STALL() \
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{ \
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if(OPAL_UNLIKELY(opal_cr_is_enabled && !opal_cr_stall_check)) { \
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opal_cr_test_if_checkpoint_ready(); \
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} \
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}
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#else
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#define OPAL_CR_TEST_CHECKPOINT_READY_STALL() ;
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#endif
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/*******************************
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* Notification Routines
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*******************************/
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/*******************************
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* Notification Routines
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*******************************/
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/*
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* Init OPAL entry point functionality
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*/
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OPAL_DECLSPEC int opal_cr_entry_point_init(void);
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/*
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* Finalize OPAL entry point functionality
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*/
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OPAL_DECLSPEC int opal_cr_entry_point_finalize(void);
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/**
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* A function to respond to the async checkpoint request
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* this is useful when figuring out who should respond
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* when stalling.
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*/
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typedef int (*opal_cr_notify_callback_fn_t) (opal_cr_ckpt_cmd_state_t);
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OPAL_DECLSPEC int opal_cr_reg_notify_callback
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(opal_cr_notify_callback_fn_t new_func,
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opal_cr_notify_callback_fn_t *prev_func);
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/**
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* Function to go through the INC
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* - Call Registered INC_Coord(CHECKPOINT)
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* - Call the CRS.checkpoint()
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* - Call Registered INC_Coord(state)
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*/
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OPAL_DECLSPEC int opal_cr_inc_core(pid_t pid,
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opal_crs_base_snapshot_t *snapshot,
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bool term, int *state);
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/*******************************
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* Coordination Routines
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*******************************/
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/**
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* Coordination callback routine signature
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*/
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typedef int (*opal_cr_coord_callback_fn_t) (int);
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/**
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* Register a checkpoint coodination routine
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* for a higher level.
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*/
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OPAL_DECLSPEC int opal_cr_reg_coord_callback
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(opal_cr_coord_callback_fn_t new_func,
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opal_cr_coord_callback_fn_t *prev_func);
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/**
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* OPAL Checkpoint Coordination Routine
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*/
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OPAL_DECLSPEC int opal_cr_coord(int state);
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#if defined(c_plusplus) || defined(__cplusplus)
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}
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#endif
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#endif /* OPAL_CR_H */
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