lighttpd
/
lighttpd2
2
0
Fork 0
Code Issues Releases Wiki Activity

[core] change memory profiler output, add minsize parameter to debug.profiler_dump action

Browse Source
personal/stbuehler/wip
Thomas Porzelt 12 years ago
parent 60fc8d421d
commit 011380dcb7
4 changed files with 141 additions and 36 deletions
Show Stats Download Patch File Download Diff File

3
include/lighttpd/profiler.h
Unescape Escape View File

@ -17,7 +17,6 @@ struct liProfilerMem {
LI_API void li_profiler_enable(gchar *output_path); /* enables the profiler */
LI_API void li_profiler_finish();
LI_API void li_profiler_dump(); /* dumps memory statistics to stdout */
LI_API void li_profiler_dump_table();
LI_API void li_profiler_dump(gint minsize); /* dumps memory statistics to file specified in LI_PROFILE_MEM env var */
#endif

3
src/main/lighttpd_worker.c
Unescape Escape View File

@ -55,8 +55,7 @@ int main(int argc, char *argv[]) {
/*g_mem_set_vtable(glib_mem_profiler_table);*/
li_profiler_enable(profile_mem);
atexit(li_profiler_finish);
atexit(li_profiler_dump);
/*atexit(profiler_dump_table);*/
/*atexit(li_profiler_dump);*/
}
}
#endif

151
src/main/profiler.c
Unescape Escape View File

@ -21,17 +21,27 @@
#endif
#define PROFILER_HASHTABLE_SIZE 65521
#define PROFILER_STACKFRAMES 36
typedef struct profiler_block profiler_block;
struct profiler_block {
gpointer addr;
gsize size;
profiler_block *next;
void *stackframes[12];
void *stackframes[PROFILER_STACKFRAMES];
gint stackframes_num;
};
typedef struct profiler_stackframe profiler_stackframe;
struct profiler_stackframe {
gpointer addr;
gsize size;
guint blocks;
gchar *symbol;
profiler_stackframe *next;
profiler_stackframe *children;
};
static void profiler_free(gpointer addr);
@ -80,7 +90,7 @@ static void profiler_hashtable_insert(gpointer addr, gsize size) {
block->addr = addr;
block->size = size;
#ifdef HAVE_EXECINFO_H
block->stackframes_num = backtrace(block->stackframes, 12);
block->stackframes_num = backtrace(block->stackframes, PROFILER_STACKFRAMES);
#endif
block->next = profiler_hashtable[hash % PROFILER_HASHTABLE_SIZE];
@ -276,14 +286,75 @@ void li_profiler_finish() {
free(profiler_hashtable);
}
void li_profiler_dump() {
profiler_block *block;
guint i;
gint len;
static void profiler_dump_frame(guint level, profiler_stackframe *frame, gsize minsize) {
gchar str[1024];
gint len;
gboolean swapped;
profiler_stackframe *f;
/* sort this tree level according to total allocated size. yes, bubblesort. */
do {
profiler_stackframe *f1, *f2;
swapped = FALSE;
for (f1 = frame, f2 = frame->next; f1 != NULL && f2 != NULL; f1 = f2, f2 = f2->next) {
if (f2->size > f1->size) {
profiler_stackframe tmp = *f1;
f1->addr = f2->addr;
f1->blocks = f2->blocks;
f1->size = f2->size;
f1->children = f2->children;
f1->symbol = f2->symbol;
f2->addr = tmp.addr;
f2->blocks = tmp.blocks;
f2->size = tmp.size;
f2->children = tmp.children;
f2->symbol = tmp.symbol;
swapped = TRUE;
}
}
} while (swapped);
while (frame) {
if (frame->size >= minsize) {
/* indention */
memset(str, ' ', level*4);
profiler_write(str, level*4);
len = sprintf(str,
"%"G_GSIZE_FORMAT" %s in %u blocks @ %p %s\n",
(frame->size > 1024) ? frame->size / 1024 : frame->size,
(frame->size > 1024) ? "kilobytes" : "bytes",
frame->blocks,
frame->addr, frame->symbol
);
profiler_write(str, len);
}
if (frame->children)
profiler_dump_frame(level+1, frame->children, minsize);
f = frame->next;
free(frame->symbol);
free(frame);
frame = f;
}
}
void li_profiler_dump(gint minsize) {
profiler_stackframe *tree_cur, *frame;
gchar **symbols;
gint i, j, len;
profiler_block *block;
struct stat st;
gsize leaked_size = 0;
guint leaked_num = 0;
gchar str[1024];
gsize total_size = 0;
guint total_blocks = 0;
profiler_stackframe *tree = calloc(1, sizeof(profiler_stackframe));
g_static_mutex_lock(&profiler_mutex);
@ -295,33 +366,63 @@ void li_profiler_dump() {
for (i = 0; i < PROFILER_HASHTABLE_SIZE; i++) {
for (block = profiler_hashtable[i]; block != NULL; block = block->next) {
leaked_num++;
leaked_size += block->size;
len = sprintf(str, "--------------- unfreed block of %"G_GSIZE_FORMAT" bytes @ %p ---------------\n", block->size, block->addr);
profiler_write(str, len);
total_size += block->size;
total_blocks++;
#ifdef HAVE_EXECINFO_H
backtrace_symbols_fd(block->stackframes, block->stackframes_num, profiler_output_fd);
/* resolve all symbols */
symbols = backtrace_symbols(block->stackframes, block->stackframes_num);
tree_cur = tree;
for (j = block->stackframes_num-1; j >= 0; j--) {
for (frame = tree_cur->children; frame != NULL; frame = frame->next) {
if (block->stackframes[j] == frame->addr) {
frame->blocks++;
frame->size += block->size;
break;
}
}
if (!frame) {
frame = malloc(sizeof(profiler_stackframe));
frame->addr = block->stackframes[j];
frame->blocks = 1;
frame->size = block->size;
frame->symbol = strdup(symbols[j]);
frame->children = NULL;
frame->next = tree_cur->children;
tree_cur->children = frame;
}
tree_cur = frame;
}
free(symbols);
#endif
}
}
#ifdef HAVE_EXECINFO_H
profiler_dump_frame(0, tree->children, minsize);
#endif
len = sprintf(str,
"--------------- memory profiler stats ---------------\n"
"leaked objects:\t\t%u\n"
"leaked bytes:\t\t%"G_GSIZE_FORMAT" %s\n",
leaked_num,
(leaked_size > 1024) ? leaked_size / 1024 : leaked_size,
(leaked_size > 1024) ? "kilobytes" : "bytes"
"--------------- memory profiler summary ---------------\n"
"total blocks: %u\n"
"total size: %"G_GSIZE_FORMAT" %s\n",
total_blocks,
(total_size > 1024) ? total_size / 1024 : total_size,
(total_size > 1024) ? "kilobytes" : "bytes"
);
profiler_write(str, len);
len = sprintf(str, "--------------- memory profiler dump end ---------------\n");
profiler_write(str, len);
g_static_mutex_unlock(&profiler_mutex);
free(tree);
}
void li_profiler_dump_table() {
profiler_write(str, len);
g_static_mutex_unlock(&profiler_mutex);
}

20
src/modules/mod_debug.c
Unescape Escape View File

@ -28,7 +28,7 @@
* - more debug actions (for other stuff than connections)
*
* Author:
* Copyright (c) 2009 Thomas Porzelt
* Copyright (c) 2009-2011 Thomas Porzelt
* License:
* MIT, see COPYING file in the lighttpd 2 tree
*/
@ -333,25 +333,31 @@ static liAction* debug_show_connections_create(liServer *srv, liWorker *wrk, liP
#ifdef WITH_PROFILER
static liHandlerResult debug_profiler_dump(liVRequest *vr, gpointer param, gpointer *context) {
UNUSED(vr); UNUSED(param); UNUSED(context);
gint minsize = GPOINTER_TO_INT(param);
UNUSED(vr); UNUSED(context);
if (!getenv("LIGHTY_PROFILE_MEM"))
return LI_HANDLER_GO_ON;
li_profiler_dump();
li_profiler_dump(minsize);
return LI_HANDLER_GO_ON;
}
static liAction* debug_profiler_dump_create(liServer *srv, liWorker *wrk, liPlugin* p, liValue *val, gpointer userdata) {
UNUSED(wrk); UNUSED(userdata);
gpointer ptr;
if (val) {
ERROR(srv, "%s", "debug.profiler_dump doesn't expect any parameters");
UNUSED(wrk); UNUSED(p); UNUSED(userdata);
if (val && val->type != LI_VALUE_NUMBER) {
ERROR(srv, "%s", "debug.profiler_dump takes an optional integer (minsize) as parameter");
return NULL;
}
return li_action_new_function(debug_profiler_dump, NULL, NULL, p);
ptr = GINT_TO_POINTER(val ? val->data.number : 10240);
return li_action_new_function(debug_profiler_dump, NULL, NULL, ptr);
}
#endif

Write Preview
Loading…
Cancel
Save