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Commit 016c6cdf authored by Sergey Senozhatsky's avatar Sergey Senozhatsky Committed by Linus Torvalds
Browse files

tools/vm/slabinfo: introduce extended totals mode 



Add "-X|--Xtotals" opt to output extended totals summary,
which includes:
-- totals summary
-- slabs sorted by size
-- slabs sorted by loss (waste)

Example:
=======

slabinfo --X -N 1
  Slabcache Totals
  ----------------
  Slabcaches :  91      Aliases  : 120->69  Active:  65
  Memory used: 568.3M   # Loss   :  30.4M   MRatio:     5%
  # Objects  : 920.1K   # PartObj: 161.2K   ORatio:    17%

  Per Cache    Average         Min         Max       Total
  ---------------------------------------------------------
  #Objects       14.1K           1      227.8K      920.1K
  #Slabs           533           1       11.7K       34.7K
  #PartSlab         86           0        4.3K        5.6K
  %PartSlab        24%          0%        100%         16%
  PartObjs          17           0      129.3K      161.2K
  % PartObj        17%          0%        100%         17%
  Memory          8.7M        8.1K      384.7M      568.3M
  Used            8.2M         160      366.5M      537.9M
  Loss          468.8K           0       18.2M       30.4M

  Per Object   Average         Min         Max
  ---------------------------------------------
  Memory           587           8        8.1K
  User             584           8        8.1K
  Loss               2           0          64

  Slabs sorted by size
  ----------------------
  Name                   Objects Objsize    Space Slabs/Part/Cpu  O/S O %Fr %Ef Flg
  ext4_inode_cache        211142    1736   384.7M    11732/40/10   18 3   0  95 a

  Slabs sorted by loss
  ----------------------
  Name                   Objects Objsize    Loss Slabs/Part/Cpu  O/S O %Fr %Ef Flg
  ext4_inode_cache        211142    1736    18.2M    11732/40/10   18 3   0  95 a

Signed-off-by: default avatarSergey Senozhatsky <sergey.senozhatsky@gmail.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 0d00bf58

tools/vm/slabinfo.c

+44 −10
Original line number Diff line number Diff line
@@ -81,6 +81,7 @@ int show_ops = 0; 
int show_activity = 0;

int output_lines = -1;

int sort_loss;

int extended_totals;



/* Debug options */

int sanity = 0;
@@ -128,6 +129,7 @@ static void usage(void) 
		"-1|--1ref              Single reference\n"

		"-N|--lines=K           Show the first K slabs\n"

		"-L|--Loss              Sort by loss\n"

		"-X|--Xtotals           Show extended summary information\n"

		"\nValid debug options (FZPUT may be combined)\n"

		"a / A          Switch on all debug options (=FZUP)\n"

		"-              Switch off all debug options\n"
@@ -615,8 +617,7 @@ static void slabcache(struct slabinfo *s) 
			total_free ? (s->free_fastpath * 100 / total_free) : 0,

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

			s->cmpxchg_double_cpu_fail);

	}

	else

	} else {

		printf("%-21s %8ld %7d %8s %14s %4d %1d %3ld %3ld %s\n",

			s->name, s->objects, s->object_size, size_str, dist_str,

			s->objs_per_slab, s->order,
@@ -625,6 +626,7 @@ static void slabcache(struct slabinfo *s) 
				(s->slabs * (page_size << s->order)) : 100,

			flags);

	}

}



/*

 * Analyze debug options. Return false if something is amiss.
@@ -1256,15 +1258,16 @@ static void read_slab_dir(void) 
static void output_slabs(void)

{

	struct slabinfo *slab;

	int lines = output_lines;



	for (slab = slabinfo; (slab < slabinfo + slabs) &&

			output_lines != 0; slab++) {

			lines != 0; slab++) {



		if (slab->alias)

			continue;



		if (output_lines != -1)

			output_lines--;

		if (lines != -1)

			lines--;



		if (show_numa)

			slab_numa(slab, 0);
@@ -1285,6 +1288,30 @@ static void output_slabs(void) 
	}

}



static void xtotals(void)

{

	totals();



	link_slabs();

	rename_slabs();



	printf("\nSlabs sorted by size\n");

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

	sort_loss = 0;

	sort_size = 1;

	sort_slabs();

	output_slabs();



	printf("\nSlabs sorted by loss\n");

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

	line = 0;

	sort_loss = 1;

	sort_size = 0;

	sort_slabs();

	output_slabs();

	printf("\n");

}



struct option opts[] = {

	{ "aliases", no_argument, NULL, 'a' },

	{ "activity", no_argument, NULL, 'A' },
@@ -1307,6 +1334,7 @@ struct option opts[] = { 
	{ "1ref", no_argument, NULL, '1'},

	{ "lines", required_argument, NULL, 'N'},

	{ "Loss", no_argument, NULL, 'L'},

	{ "Xtotals", no_argument, NULL, 'X'},

	{ NULL, 0, NULL, 0 }

};
@@ -1318,7 +1346,7 @@ int main(int argc, char *argv[]) 


	page_size = getpagesize();



	while ((c = getopt_long(argc, argv, "aAd::Defhil1noprstvzTSN:L",

	while ((c = getopt_long(argc, argv, "aAd::Defhil1noprstvzTSN:LX",

						opts, NULL)) != -1)

		switch (c) {

		case '1':
@@ -1390,6 +1418,11 @@ int main(int argc, char *argv[]) 
		case 'L':

			sort_loss = 1;

			break;

		case 'X':

			if (output_lines == -1)

				output_lines = 1;

			extended_totals = 1;

			break;

		default:

			fatal("%s: Invalid option '%c'\n", argv[0], optopt);
@@ -1409,12 +1442,13 @@ int main(int argc, char *argv[]) 
		fatal("%s: Invalid pattern '%s' code %d\n",

			argv[0], pattern_source, err);

	read_slab_dir();

	if (show_alias)

	if (show_alias) {

		alias();

	else

	if (show_totals)

	} else if (extended_totals) {

		xtotals();

	} else if (show_totals) {

		totals();

	else {

	} else {

		link_slabs();

		rename_slabs();

		sort_slabs();