X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/blobdiff_plain/2093781c3522f4122f1914486e94c1d4b8bcb3e2..f7d3e337e64b54125c8a990a99583383a6bf9780:/src/smpi/smpi_bench.c

diff --git a/src/smpi/smpi_bench.c b/src/smpi/smpi_bench.c
index 84a0bac483..915a5a543e 100644
--- a/src/smpi/smpi_bench.c
+++ b/src/smpi/smpi_bench.c
@@ -1,4 +1,4 @@
-/* Copyright (c) 2007, 2009, 2010. The SimGrid Team.
+/* Copyright (c) 2007, 2009-2013. The SimGrid Team.
  * All rights reserved.                                                     */
 
 /* This program is free software; you can redistribute it and/or modify it
@@ -8,6 +8,7 @@
 #include "xbt/dict.h"
 #include "xbt/sysdep.h"
 #include "xbt/ex.h"
+#include "xbt/hash.h"
 #include "surf/surf.h"
 #include "simgrid/sg_config.h"
 
@@ -102,13 +103,13 @@ static void* shm_map(int fd, size_t size, shared_data_t* data) {
     xbt_die("Could not map fd %d: %s", fd, strerror(errno));
   }
   if(!allocs_metadata) {
-    allocs_metadata = xbt_dict_new();
+    allocs_metadata = xbt_dict_new_homogeneous(xbt_free);
   }
   snprintf(loc, PTR_STRLEN, "%p", mem);
   meta = xbt_new(shared_metadata_t, 1);
   meta->size = size;
   meta->data = data;
-  xbt_dict_set(allocs_metadata, loc, meta, &free);
+  xbt_dict_set(allocs_metadata, loc, meta, NULL);
   XBT_DEBUG("MMAP %zu to %p", size, mem);
   return mem;
 }
@@ -117,6 +118,7 @@ static void* shm_map(int fd, size_t size, shared_data_t* data) {
 void smpi_bench_destroy(void)
 {
   xbt_dict_free(&allocs);
+  xbt_dict_free(&allocs_metadata);
   xbt_dict_free(&samples);
   xbt_dict_free(&calls);
 }
@@ -218,6 +220,8 @@ typedef struct {
   int benching;     /* 1: we are benchmarking; 0: we have enough data, no bench anymore */
 } local_data_t;
 
+int smpi_sample_is_running = 0;
+
 static char *sample_location(int global, const char *file, int line) {
   if (global) {
     return bprintf("%s:%d", file, line);
@@ -245,6 +249,8 @@ void smpi_sample_1(int global, const char *file, int line, int iters, double thr
   local_data_t *data;
 
   smpi_bench_end();     /* Take time from previous, unrelated computation into account */
+  smpi_sample_is_running++;
+
   if (!samples)
     samples = xbt_dict_new_homogeneous(free);
 
@@ -299,6 +305,7 @@ int smpi_sample_2(int global, const char *file, int line)
         data->count, data->iters, data->relstderr, data->threshold, data->mean);
     smpi_execute(data->mean);
 
+    smpi_sample_is_running--;
     smpi_bench_begin(); // prepare to capture future, unrelated computations
     return 0;
   }
@@ -342,33 +349,60 @@ void smpi_sample_3(int global, const char *file, int line)
 }
 
 #ifndef WIN32
+static void smpi_shared_alloc_free(void *p)
+{
+  shared_data_t *data = p;
+  xbt_free(data->loc);
+  xbt_free(data);
+}
+
+static char *smpi_shared_alloc_hash(char *loc)
+{
+  char hash[42];
+  char s[7];
+  unsigned val;
+  int i, j;
+
+  xbt_sha(loc, hash);
+  hash[41] = '\0';
+  s[6] = '\0';
+  loc = xbt_realloc(loc, 30);
+  loc[0] = '/';
+  for (i = 0; i < 40; i += 6) { /* base64 encode */
+    memcpy(s, hash + i, 6);
+    val = strtoul(s, NULL, 16);
+    for (j = 0; j < 4; j++) {
+      unsigned char x = (val >> (18 - 3 * j)) & 0x3f;
+      loc[1 + 4 * i / 6 + j] =
+        "ABCDEFGHIJKLMNOPQRSTUVZXYZabcdefghijklmnopqrstuvzxyz0123456789-_"[x];
+    }
+  }
+  loc[29] = '\0';
+  return loc;
+}
+
 void *smpi_shared_malloc(size_t size, const char *file, int line)
 {
-  char *loc = bprintf("%zu_%s_%d", (size_t)getpid(), file, line);
-  size_t len = strlen(loc);
-  size_t i;
-  int fd;
   void* mem;
-  shared_data_t *data;
   if (sg_cfg_get_boolean("smpi/use_shared_malloc")){
-    for(i = 0; i < len; i++) {
-      /* Make the 'loc' ID be a flat filename */
-      if(loc[i] == '/') {
-        loc[i] = '_';
-      }
-    }
+    char *loc = bprintf("%zu_%s_%d", (size_t)getpid(), file, line);
+    int fd;
+    shared_data_t *data;
+    loc = smpi_shared_alloc_hash(loc); /* hash loc, in order to have something
+                                        * not too long */
     if (!allocs) {
-      allocs = xbt_dict_new_homogeneous(free);
+      allocs = xbt_dict_new_homogeneous(smpi_shared_alloc_free);
     }
     data = xbt_dict_get_or_null(allocs, loc);
-    if(!data) {
-      fd = shm_open(loc, O_RDWR | O_CREAT | O_EXCL, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
-      if(fd < 0) {
+    if (!data) {
+      fd = shm_open(loc, O_RDWR | O_CREAT | O_EXCL,
+                    S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
+      if (fd < 0) {
         switch(errno) {
           case EEXIST:
             xbt_die("Please cleanup /dev/shm/%s", loc);
           default:
-            xbt_die("An unhandled error occured while opening %s: %s", loc, strerror(errno));
+            xbt_die("An unhandled error occured while opening %s. shm_open: %s", loc, strerror(errno));
         }
       }
       data = xbt_new(shared_data_t, 1);
@@ -376,17 +410,18 @@ void *smpi_shared_malloc(size_t size, const char *file, int line)
       data->count = 1;
       data->loc = loc;
       mem = shm_map(fd, size, data);
-      if(shm_unlink(loc) < 0) {
-        XBT_WARN("Could not early unlink %s: %s", loc, strerror(errno));
+      if (shm_unlink(loc) < 0) {
+        XBT_WARN("Could not early unlink %s. shm_unlink: %s", loc, strerror(errno));
       }
       xbt_dict_set(allocs, loc, data, NULL);
       XBT_DEBUG("Mapping %s at %p through %d", loc, mem, fd);
     } else {
+      xbt_free(loc);
       mem = shm_map(data->fd, size, data);
       data->count++;
     }
     XBT_DEBUG("Shared malloc %zu in %p (metadata at %p)", size, mem, data);
-  }else{
+  } else {
     mem = xbt_malloc(size);
     XBT_DEBUG("Classic malloc %zu in %p", size, mem);
   }
@@ -426,7 +461,6 @@ void smpi_shared_free(void *ptr)
     if (data->count <= 0) {
       close(data->fd);
       xbt_dict_remove(allocs, data->loc);
-      free(data->loc);
       XBT_DEBUG("Shared free - with removal - of %p", ptr);
     }
   }else{