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tools/vm/slabinfo: sort slabs by loss

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Introduce opt "-L|--sort-loss" to sort and output slabs by
loss (waste) in slabcache().

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 18:45:22 -08:00 committed by Linus Torvalds
parent 4980a9639b
commit 2651f6e7fe
1 changed files with 21 additions and 4 deletions
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25
tools/vm/slabinfo.c
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@ -80,6 +80,7 @@ int set_debug = 0;
int show_ops = 0;
int show_activity = 0;
int output_lines = -1;
int sort_loss;
/* Debug options */
int sanity = 0;
@ -126,6 +127,7 @@ static void usage(void)
"-z|--zero Include empty slabs\n"
"-1|--1ref Single reference\n"
"-N|--lines=K Show the first K slabs\n"
"-L|--Loss Sort by loss\n"
"\nValid debug options (FZPUT may be combined)\n"
"a / A Switch on all debug options (=FZUP)\n"
"- Switch off all debug options\n"
@ -301,8 +303,9 @@ static void first_line(void)
if (show_activity)
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");
printf("Name Objects Objsize %s "
"Slabs/Part/Cpu O/S O %%Fr %%Ef Flg\n",
sort_loss ? "Loss" : "Space");
}
/*
@ -335,6 +338,11 @@ static unsigned long slab_activity(struct slabinfo *s)
s->alloc_slowpath + s->free_slowpath;
}
static unsigned long slab_waste(struct slabinfo *s)
{
return slab_size(s) - s->objects * s->object_size;
}
static void slab_numa(struct slabinfo *s, int mode)
{
int node;
@ -563,7 +571,10 @@ static void slabcache(struct slabinfo *s)
if (show_empty && s->slabs)
return;
store_size(size_str, slab_size(s));
if (sort_loss == 0)
store_size(size_str, slab_size(s));
else
store_size(size_str, slab_waste(s));
snprintf(dist_str, 40, "%lu/%lu/%d", s->slabs - s->cpu_slabs,
s->partial, s->cpu_slabs);
@ -1013,6 +1024,8 @@ static void sort_slabs(void)
result = slab_size(s1) < slab_size(s2);
else if (sort_active)
result = slab_activity(s1) < slab_activity(s2);
else if (sort_loss)
result = slab_waste(s1) < slab_waste(s2);
else
result = strcasecmp(s1->name, s2->name);
@ -1291,6 +1304,7 @@ struct option opts[] = {
{ "zero", no_argument, NULL, 'z' },
{ "1ref", no_argument, NULL, '1'},
{ "lines", required_argument, NULL, 'N'},
{ "Loss", no_argument, NULL, 'L'},
{ NULL, 0, NULL, 0 }
};
@ -1302,7 +1316,7 @@ int main(int argc, char *argv[])
page_size = getpagesize();
while ((c = getopt_long(argc, argv, "aAd::Defhil1noprstvzTSN:",
while ((c = getopt_long(argc, argv, "aAd::Defhil1noprstvzTSN:L",
opts, NULL)) != -1)
switch (c) {
case '1':
@ -1371,6 +1385,9 @@ int main(int argc, char *argv[])
output_lines = 1;
}
break;
case 'L':
sort_loss = 1;
break;
default:
fatal("%s: Invalid option '%c'\n", argv[0], optopt);