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tools/vm/slabinfo: introduce extended totals mode

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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: Sergey 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: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Sergey Senozhatsky 2015-11-05 18:45:28 -08:00 committed by Linus Torvalds
parent 0d00bf589f
commit 016c6cdf3d
1 changed files with 44 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

54
tools/vm/slabinfo.c
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@ -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,
@ -624,6 +625,7 @@ static void slabcache(struct slabinfo *s)
s->slabs ? (s->objects * s->object_size * 100) /
(s->slabs * (page_size << s->order)) : 100,
flags);
}
}
/*
@ -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();