Commit 9da4714a authored by Christoph Lameter's avatar Christoph Lameter Committed by Pekka Enberg
Browse files

slub: slabinfo update for cmpxchg handling 



Update the statistics handling and the slabinfo tool to include the new
statistics in the reports it generates.

Signed-off-by: default avatarChristoph Lameter <cl@linux.com>
Signed-off-by: default avatarPekka Enberg <penberg@kernel.org>
parent 4eade540

tools/slub/slabinfo.c

+40 −19
Original line number Diff line number Diff line
@@ -2,8 +2,9 @@ 
 * Slabinfo: Tool to get reports about slabs

 *

 * (C) 2007 sgi, Christoph Lameter

 * (C) 2011 Linux Foundation, Christoph Lameter

 *

 * Compile by:

 * Compile with:

 *

 * gcc -o slabinfo slabinfo.c

 */
@@ -39,6 +40,8 @@ struct slabinfo { 
	unsigned long cpuslab_flush, deactivate_full, deactivate_empty;

	unsigned long deactivate_to_head, deactivate_to_tail;

	unsigned long deactivate_remote_frees, order_fallback;

	unsigned long cmpxchg_double_cpu_fail, cmpxchg_double_fail;

	unsigned long alloc_node_mismatch, deactivate_bypass;

	int numa[MAX_NODES];

	int numa_partial[MAX_NODES];

} slabinfo[MAX_SLABS];
@@ -99,7 +102,7 @@ static void fatal(const char *x, ...) 


static void usage(void)

{

	printf("slabinfo 5/7/2007. (c) 2007 sgi.\n\n"

	printf("slabinfo 4/15/2011. (c) 2007 sgi/(c) 2011 Linux Foundation.\n\n"

		"slabinfo [-ahnpvtsz] [-d debugopts] [slab-regexp]\n"

		"-a|--aliases           Show aliases\n"

		"-A|--activity          Most active slabs first\n"
@@ -293,7 +296,7 @@ int line = 0; 
static void first_line(void)

{

	if (show_activity)

		printf("Name                   Objects      Alloc       Free   %%Fast Fallb O\n");

		printf("Name                   Objects      Alloc       Free   %%Fast Fallb O CmpX   UL\n");

	else

		printf("Name                   Objects Objsize    Space "

			"Slabs/Part/Cpu  O/S O %%Fr %%Ef Flg\n");
@@ -379,14 +382,14 @@ static void show_tracking(struct slabinfo *s) 
	printf("\n%s: Kernel object allocation\n", s->name);

	printf("-----------------------------------------------------------------------\n");

	if (read_slab_obj(s, "alloc_calls"))

		printf(buffer);

		printf("%s", buffer);

	else

		printf("No Data\n");



	printf("\n%s: Kernel object freeing\n", s->name);

	printf("------------------------------------------------------------------------\n");

	if (read_slab_obj(s, "free_calls"))

		printf(buffer);

		printf("%s", buffer);

	else

		printf("No Data\n");
@@ -400,7 +403,7 @@ static void ops(struct slabinfo *s) 
	if (read_slab_obj(s, "ops")) {

		printf("\n%s: kmem_cache operations\n", s->name);

		printf("--------------------------------------------\n");

		printf(buffer);

		printf("%s", buffer);

	} else

		printf("\n%s has no kmem_cache operations\n", s->name);

}
@@ -462,19 +465,32 @@ static void slab_stats(struct slabinfo *s) 
	if (s->cpuslab_flush)

		printf("Flushes %8lu\n", s->cpuslab_flush);



	if (s->alloc_refill)

		printf("Refill %8lu\n", s->alloc_refill);



	total = s->deactivate_full + s->deactivate_empty +

			s->deactivate_to_head + s->deactivate_to_tail;



	if (total)

		printf("Deactivate Full=%lu(%lu%%) Empty=%lu(%lu%%) "

			"ToHead=%lu(%lu%%) ToTail=%lu(%lu%%)\n",

			s->deactivate_full, (s->deactivate_full * 100) / total,

			s->deactivate_empty, (s->deactivate_empty * 100) / total,

			s->deactivate_to_head, (s->deactivate_to_head * 100) / total,

			s->deactivate_to_head + s->deactivate_to_tail + s->deactivate_bypass;



	if (total) {

		printf("\nSlab Deactivation             Ocurrences  %%\n");

		printf("-------------------------------------------------\n");

		printf("Slab full                     %7lu  %3lu%%\n",

			s->deactivate_full, (s->deactivate_full * 100) / total);

		printf("Slab empty                    %7lu  %3lu%%\n",

			s->deactivate_empty, (s->deactivate_empty * 100) / total);

		printf("Moved to head of partial list %7lu  %3lu%%\n",

			s->deactivate_to_head, (s->deactivate_to_head * 100) / total);

		printf("Moved to tail of partial list %7lu  %3lu%%\n",

			s->deactivate_to_tail, (s->deactivate_to_tail * 100) / total);

		printf("Deactivation bypass           %7lu  %3lu%%\n",

			s->deactivate_bypass, (s->deactivate_bypass * 100) / total);

		printf("Refilled from foreign frees   %7lu  %3lu%%\n",

			s->alloc_refill, (s->alloc_refill * 100) / total);

		printf("Node mismatch                 %7lu  %3lu%%\n",

			s->alloc_node_mismatch, (s->alloc_node_mismatch * 100) / total);

	}



	if (s->cmpxchg_double_fail || s->cmpxchg_double_cpu_fail)

		printf("\nCmpxchg_double Looping\n------------------------\n");

		printf("Locked Cmpxchg Double redos   %lu\nUnlocked Cmpxchg Double redos %lu\n",

			s->cmpxchg_double_fail, s->cmpxchg_double_cpu_fail);

}



static void report(struct slabinfo *s)
@@ -573,12 +589,13 @@ static void slabcache(struct slabinfo *s) 
		total_alloc = s->alloc_fastpath + s->alloc_slowpath;

		total_free = s->free_fastpath + s->free_slowpath;



		printf("%-21s %8ld %10ld %10ld %3ld %3ld %5ld %1d\n",

		printf("%-21s %8ld %10ld %10ld %3ld %3ld %5ld %1d %4ld %4ld\n",

			s->name, s->objects,

			total_alloc, total_free,

			total_alloc ? (s->alloc_fastpath * 100 / total_alloc) : 0,

			total_free ? (s->free_fastpath * 100 / total_free) : 0,

			s->order_fallback, s->order);

			s->order_fallback, s->order, s->cmpxchg_double_fail,

			s->cmpxchg_double_cpu_fail);

	}

	else

		printf("%-21s %8ld %7d %8s %14s %4d %1d %3ld %3ld %s\n",
@@ -1190,6 +1207,10 @@ static void read_slab_dir(void) 
			slab->deactivate_to_tail = get_obj("deactivate_to_tail");

			slab->deactivate_remote_frees = get_obj("deactivate_remote_frees");

			slab->order_fallback = get_obj("order_fallback");

			slab->cmpxchg_double_cpu_fail = get_obj("cmpxchg_double_cpu_fail");

			slab->cmpxchg_double_fail = get_obj("cmpxchg_double_fail");

			slab->alloc_node_mismatch = get_obj("alloc_node_mismatch");

			slab->deactivate_bypass = get_obj("deactivate_bypass");

			chdir("..");

			if (slab->name[0] == ':')

				alias_targets++;