r13939@catbus: nickm | 2007-07-27 14:33:22 -0400

 When dumping memory usage, list bytes used in buffer memory free-lists.


svn:r10947

4 files changed, 22 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index 71243bcf53..de4b86fafe 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -12,6 +12,7 @@ Changes in version 0.2.0.3-alpha - 2007-??-??
       write-protects the authority identity key.
     - New ConstrainedSockets option to set SO_SNDBUF and SO_RCVBUF on TCP
       sockets.  (Patch from coderman.)
+    - When dumping memory usage, list bytes used in buffer memory free-lists.
 
   o Minor features (directory authority):
     - Fail quickly and (relatively) harmlessly if we generate a network
diff --git a/src/or/buffers.c b/src/or/buffers.c
index 99271de7f9..1087a7a6fa 100644
--- a/src/or/buffers.c
+++ b/src/or/buffers.c
@@ -196,6 +196,25 @@ get_free_mem_list(size_t sz)
   }
 }
 
+/** Write the sizes of the buffer freelists at log level <b>severity</b> */
+void
+buf_dump_freelist_sizes(int severity)
+{
+  size_t sz;
+  log(severity, LD_MM, "======= Buffer freelists.");
+  for (sz = 4096; sz <= 16384; sz *= 2) {
+    uint64_t total_size;
+    free_mem_list_t *lst;
+    if (!IS_FREELIST_SIZE(sz))
+      continue;
+    lst = get_free_mem_list(sz);
+    total_size = ((uint64_t)sz)*lst->len;
+    log(severity, LD_MM,
+        U64_FORMAT" bytes in %d %d-byte buffers. (low-water: %d)",
+        U64_PRINTF_ARG(total_size), lst->len, (int)sz, lst->lowwater);
+  }
+}
+
 /** Throw the memory from <b>buf</b> onto the appropriate freelist.
  * Return true if we added the memory, 0 if the freelist was full. */
 static int
diff --git a/src/or/main.c b/src/or/main.c
index e252383074..8bedd71b86 100644
--- a/src/or/main.c
+++ b/src/or/main.c
@@ -1542,6 +1542,7 @@ dumpmemusage(int severity)
       U64_PRINTF_ARG(rephist_total_alloc), rephist_total_num);
   dump_routerlist_mem_usage(severity);
   dump_cell_pool_usage(severity);
+  buf_dump_freelist_sizes(severity);
 }
 
 /** Write all statistics to the log, with log level 'severity'.  Called
diff --git a/src/or/or.h b/src/or/or.h
index b4dffb2c81..d2f103ec74 100644
--- a/src/or/or.h
+++ b/src/or/or.h
@@ -2170,6 +2170,7 @@ void buf_free(buf_t *buf);
 void buf_clear(buf_t *buf);
 void buf_shrink(buf_t *buf);
 void buf_shrink_freelists(int free_all);
+void buf_dump_freelist_sizes(int severity);
 
 size_t buf_datalen(const buf_t *buf);
 size_t buf_capacity(const buf_t *buf);