iof: optimize handling of stderr when iof_base_redirect_app_stderr_to_stdout is set

avoid creating a pipe for a task stderr when we know it will be redirected to stdout

Signed-off-by: Gilles Gouaillardet <gilles@rist.or.jp>

orte/mca/iof/base/iof_base_setup.c

@@ -113,9 +113,11 @@ orte_iof_base_setup_prefork(orte_iof_base_io_conf_t *opts)
             return ORTE_ERR_SYS_LIMITS_PIPES;
         }
     }
-    if (pipe(opts->p_stderr) < 0) {
+    if( !orte_iof_base.redirect_app_stderr_to_stdout ) {
-        ORTE_ERROR_LOG(ORTE_ERR_SYS_LIMITS_PIPES);
+        if (pipe(opts->p_stderr) < 0) {
-        return ORTE_ERR_SYS_LIMITS_PIPES;
+            ORTE_ERROR_LOG(ORTE_ERR_SYS_LIMITS_PIPES);
+            return ORTE_ERR_SYS_LIMITS_PIPES;
+        }
     }
     if (pipe(opts->p_internal) < 0) {
         ORTE_ERROR_LOG(ORTE_ERR_SYS_LIMITS_PIPES);
@@ -136,7 +138,9 @@ orte_iof_base_setup_child(orte_iof_base_io_conf_t *opts, char ***env)
         close(opts->p_stdin[1]);
     }
     close(opts->p_stdout[0]);
-    close(opts->p_stderr[0]);
+    if( !orte_iof_base.redirect_app_stderr_to_stdout ) {
+        close(opts->p_stderr[0]);
+    }
     close(opts->p_internal[0]);
 
     if (opts->usepty) {
@@ -197,8 +201,8 @@ orte_iof_base_setup_child(orte_iof_base_io_conf_t *opts, char ***env)
         if( !orte_iof_base.redirect_app_stderr_to_stdout ) {
             ret = dup2(opts->p_stderr[1], fileno(stderr));
             if (ret < 0) return ORTE_ERR_PIPE_SETUP_FAILURE;
+            close(opts->p_stderr[1]);
         }
-        close(opts->p_stderr[1]);
     }
 
     if (!orte_map_stddiag_to_stderr && !orte_map_stddiag_to_stdout ) {
@@ -241,10 +245,12 @@ orte_iof_base_setup_parent(const orte_process_name_t* name,
         return ret;
     }
 
-    ret = orte_iof.push(name, ORTE_IOF_STDERR, opts->p_stderr[0]);
+    if( !orte_iof_base.redirect_app_stderr_to_stdout ) {
-    if(ORTE_SUCCESS != ret) {
+        ret = orte_iof.push(name, ORTE_IOF_STDERR, opts->p_stderr[0]);
-        ORTE_ERROR_LOG(ret);
+        if(ORTE_SUCCESS != ret) {
-        return ret;
+            ORTE_ERROR_LOG(ret);
+            return ret;
+        }
     }
 
     ret = orte_iof.push(name, ORTE_IOF_STDDIAG, opts->p_internal[0]);

orte/mca/iof/hnp/iof_hnp.c

@@ -201,7 +201,8 @@ static int hnp_push(const orte_process_name_t* dst_name, orte_iof_tag_t src_tag,
          * because one of the readevents fires -prior- to all of them having
          * been defined!
          */
-        if (NULL != proct->revstdout && NULL != proct->revstderr && NULL != proct->revstddiag) {
+        if (NULL != proct->revstdout && NULL != proct->revstddiag &&
+            (orte_iof_base.redirect_app_stderr_to_stdout || NULL != proct->revstderr)) {
             if (proct->copy) {
                 /* see if there are any wildcard subscribers out there that
                  * apply to us */
@@ -216,7 +217,9 @@ static int hnp_push(const orte_process_name_t* dst_name, orte_iof_tag_t src_tag,
                 }
             }
             ORTE_IOF_READ_ACTIVATE(proct->revstdout);
-            ORTE_IOF_READ_ACTIVATE(proct->revstderr);
+            if (!orte_iof_base.redirect_app_stderr_to_stdout) {
+                ORTE_IOF_READ_ACTIVATE(proct->revstderr);
+            }
             ORTE_IOF_READ_ACTIVATE(proct->revstddiag);
        }
         return ORTE_SUCCESS;

orte/mca/iof/orted/iof_orted.c

@@ -14,6 +14,8 @@
  *                         reserved.
  * Copyright (c) 2016-2017 Intel, Inc. All rights reserved.
  * Copyright (c) 2017      Mellanox Technologies. All rights reserved.
+ * Copyright (c) 2017      Research Organization for Information Science
+ *                         and Technology (RIST). All rights reserved.
  * $COPYRIGHT$
  *
  * Additional copyrights may follow
@@ -190,9 +192,12 @@ SETUP:
      * because one of the readevents fires -prior- to all of them having
      * been defined!
      */
-    if (NULL != proct->revstdout && NULL != proct->revstderr && NULL != proct->revstddiag) {
+    if (NULL != proct->revstdout && NULL != proct->revstddiag &&
+        (orte_iof_base.redirect_app_stderr_to_stdout || NULL != proct->revstderr)) {
         ORTE_IOF_READ_ACTIVATE(proct->revstdout);
-        ORTE_IOF_READ_ACTIVATE(proct->revstderr);
+        if (!orte_iof_base.redirect_app_stderr_to_stdout) {
+            ORTE_IOF_READ_ACTIVATE(proct->revstderr);
+        }
         ORTE_IOF_READ_ACTIVATE(proct->revstddiag);
     }
     return ORTE_SUCCESS;

orte/mca/odls/alps/odls_alps_module.c

@@ -472,7 +472,9 @@ static int do_parent(orte_odls_spawn_caddy_t *cd, int read_fd)
         close(cd->opts.p_stdin[0]);
     }
     close(cd->opts.p_stdout[1]);
-    close(cd->opts.p_stderr[1]);
+    if( !orte_iof_base.redirect_app_stderr_to_stdout ) {
+        close(cd->opts.p_stderr[1]);
+    }
     close(cd->opts.p_internal[1]);
 
     /* Block reading a message from the pipe */

orte/mca/odls/default/odls_default_module.c

@@ -453,7 +453,9 @@ static int do_parent(orte_odls_spawn_caddy_t *cd, int read_fd)
         close(cd->opts.p_stdin[0]);
     }
     close(cd->opts.p_stdout[1]);
-    close(cd->opts.p_stderr[1]);
+    if( !orte_iof_base.redirect_app_stderr_to_stdout ) {
+        close(cd->opts.p_stderr[1]);
+    }
     close(cd->opts.p_internal[1]);
 
     /* Block reading a message from the pipe */