added MEMORY_MAX_REQUESTED_SIZE and MEMORY_LAST_FAILED_SIZE #230

fixes #230

portability/memory.cc

@@ -221,6 +221,9 @@ toku_memory_footprint(void * p, size_t touched) {
 
 void *
 toku_malloc(size_t size) {
+    if (size > status.max_requested_size) {
+        status.max_requested_size = size;
+    }
     void *p = t_malloc ? t_malloc(size) : os_malloc(size);
     if (p) {
         TOKU_ANNOTATE_NEW_MEMORY(p, size); // see #4671 and https://bugs.kde.org/show_bug.cgi?id=297147
@@ -233,11 +236,15 @@ toku_malloc(size_t size) {
         }
     } else {
         toku_sync_add_and_fetch(&status.malloc_fail, 1);
+        status.last_failed_size = size;
     }
   return p;
 }
 
 void *toku_malloc_aligned(size_t alignment, size_t size) {
+    if (size > status.max_requested_size) {
+        status.max_requested_size = size;
+    }
     void *p = t_malloc_aligned ? t_malloc_aligned(alignment, size) : os_malloc_aligned(alignment, size);
     if (p) {
         TOKU_ANNOTATE_NEW_MEMORY(p, size); // see #4671 and https://bugs.kde.org/show_bug.cgi?id=297147
@@ -250,6 +257,7 @@ void *toku_malloc_aligned(size_t alignment, size_t size) {
         }
     } else {
         toku_sync_add_and_fetch(&status.malloc_fail, 1);
+        status.last_failed_size = size;
     }
   return p;
 }
@@ -264,6 +272,9 @@ toku_calloc(size_t nmemb, size_t size) {
 
 void *
 toku_realloc(void *p, size_t size) {
+    if (size > status.max_requested_size) {
+        status.max_requested_size = size;
+    }
     size_t used_orig = p ? my_malloc_usable_size(p) : 0;
     void *q = t_realloc ? t_realloc(p, size) : os_realloc(p, size);
     if (q) {
@@ -277,11 +288,15 @@ toku_realloc(void *p, size_t size) {
         }
     } else {
         toku_sync_add_and_fetch(&status.realloc_fail, 1);
+        status.last_failed_size = size;
     }
     return q;
 }
 
 void *toku_realloc_aligned(size_t alignment, void *p, size_t size) {
+    if (size > status.max_requested_size) {
+        status.max_requested_size = size;
+    }
     size_t used_orig = p ? my_malloc_usable_size(p) : 0;
     void *q = t_realloc_aligned ? t_realloc_aligned(alignment, p, size) : os_realloc_aligned(alignment, p, size);
     if (q) {
@@ -295,6 +310,7 @@ void *toku_realloc_aligned(size_t alignment, void *p, size_t size) {
         }
     } else {
         toku_sync_add_and_fetch(&status.realloc_fail, 1);
+        status.last_failed_size = size;
     }
     return q;
 }
@@ -329,9 +345,14 @@ toku_free(void *p) {
 
 void *
 toku_xmalloc(size_t size) {
+    if (size > status.max_requested_size) {
+        status.max_requested_size = size;
+    }
     void *p = t_xmalloc ? t_xmalloc(size) : os_malloc(size);
-    if (p == NULL)  // avoid function call in common case
+    if (p == NULL) {  // avoid function call in common case
+        status.last_failed_size = size;
         resource_assert(p);
+    }
     TOKU_ANNOTATE_NEW_MEMORY(p, size); // see #4671 and https://bugs.kde.org/show_bug.cgi?id=297147
     if (toku_memory_do_stats) {
         size_t used = my_malloc_usable_size(p);
@@ -348,8 +369,14 @@ void* toku_xmalloc_aligned(size_t alignment, size_t size)
 //  Fail with a resource_assert if the allocation fails (don't return an error code).
 // Requires: alignment is a power of two.
 {
+    if (size > status.max_requested_size) {
+        status.max_requested_size = size;
+    }
     void *p = t_xmalloc_aligned ? t_xmalloc_aligned(alignment, size) : os_malloc_aligned(alignment,size);
+    if (p == NULL) {
+        status.last_failed_size = size;
         resource_assert(p);
+    }
     if (toku_memory_do_stats) {
         size_t used = my_malloc_usable_size(p);
         toku_sync_add_and_fetch(&status.malloc_count, 1);
@@ -370,10 +397,15 @@ toku_xcalloc(size_t nmemb, size_t size) {
 
 void *
 toku_xrealloc(void *v, size_t size) {
+    if (size > status.max_requested_size) {
+        status.max_requested_size = size;
+    }
     size_t used_orig = v ? my_malloc_usable_size(v) : 0;
     void *p = t_xrealloc ? t_xrealloc(v, size) : os_realloc(v, size);
-    if (p == 0)  // avoid function call in common case
+    if (p == 0) {  // avoid function call in common case
+        status.last_failed_size = size;
         resource_assert(p);
+    }
     if (toku_memory_do_stats) {
         size_t used = my_malloc_usable_size(p);
         toku_sync_add_and_fetch(&status.realloc_count, 1);

src/ydb.cc

@@ -1839,6 +1839,8 @@ typedef enum {
     MEMORY_REQUESTED,
     MEMORY_USED,
     MEMORY_FREED,
+    MEMORY_MAX_REQUESTED_SIZE,
+    MEMORY_LAST_FAILED_SIZE,
     MEMORY_MAX_IN_USE,
     MEMORY_MALLOCATOR_VERSION,
     MEMORY_MMAP_THRESHOLD,
@@ -1866,6 +1868,8 @@ memory_status_init(void) {
     STATUS_INIT(MEMORY_REQUESTED,          nullptr, UINT64,  "number of bytes requested", TOKU_ENGINE_STATUS);
     STATUS_INIT(MEMORY_USED,               nullptr, UINT64,  "number of bytes used (requested + overhead)", TOKU_ENGINE_STATUS);
     STATUS_INIT(MEMORY_FREED,              nullptr, UINT64,  "number of bytes freed", TOKU_ENGINE_STATUS);
+    STATUS_INIT(MEMORY_MAX_REQUESTED_SIZE, nullptr, UINT64,  "largest attempted allocation size", TOKU_ENGINE_STATUS);
+    STATUS_INIT(MEMORY_LAST_FAILED_SIZE,   nullptr, UINT64,  "size of the last failed allocation attempt", TOKU_ENGINE_STATUS);
     STATUS_INIT(MEMORY_MAX_IN_USE,         MEM_ESTIMATED_MAXIMUM_MEMORY_FOOTPRINT, UINT64,  "estimated maximum memory footprint", TOKU_ENGINE_STATUS|TOKU_GLOBAL_STATUS);
     STATUS_INIT(MEMORY_MALLOCATOR_VERSION, nullptr, CHARSTR, "mallocator version", TOKU_ENGINE_STATUS);
     STATUS_INIT(MEMORY_MMAP_THRESHOLD,     nullptr, UINT64,  "mmap threshold", TOKU_ENGINE_STATUS);

toku_include/memory.h

@@ -215,6 +215,8 @@ typedef struct memory_status {
     uint64_t requested;          // number of bytes requested
     uint64_t used;               // number of bytes used (requested + overhead), obtained from malloc_usable_size()
     uint64_t freed;              // number of bytes freed;
+    uint64_t max_requested_size; // largest attempted allocation size
+    uint64_t last_failed_size;   // size of the last failed allocation attempt
     volatile uint64_t max_in_use;      // maximum memory footprint (used - freed), approximate (not worth threadsafety overhead for exact)
     const char *mallocator_version;
     uint64_t mmap_threshold;