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authorTobin C. Harding <tobin@kernel.org>2019-07-11 20:59:42 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2019-07-12 11:05:46 -0700
commit53a83f9766e33d6bf4e14d5592c1939777fb98db (patch)
treea99f59c5f4a905671303438e680469700cd6a7eb
parent1106b205a3fe034beafad24045b7c00a7eb89669 (diff)
tools/vm/slabinfo: add option to sort by partial slabs
We would like to get a better view of the level of fragmentation within the SLUB allocator. Total number of partial slabs is an indicator of fragmentation. Add a command line option (-P | --partial) to sort the slab list by total number of partial slabs. Link: http://lkml.kernel.org/r/20190426022622.4089-4-tobin@kernel.org Signed-off-by: Tobin C. Harding <tobin@kernel.org> Cc: Alexander Duyck <alexander.duyck@gmail.com> Cc: Brendan Gregg <brendan.d.gregg@gmail.com>, Cc: Christoph Lameter <cl@linux.com> Cc: David Rientjes <rientjes@google.com> Cc: Jesper Dangaard Brouer <brouer@redhat.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Mel Gorman <mgorman@techsingularity.net> Cc: Michal Hocko <mhocko@kernel.org> Cc: Pekka Enberg <penberg@iki.fi> Cc: Qian Cai <cai@lca.pw> Cc: Tejun Heo <tj@kernel.org> Cc: Vlastimil Babka <vbabka@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--tools/vm/slabinfo.c9
1 files changed, 7 insertions, 2 deletions
diff --git a/tools/vm/slabinfo.c b/tools/vm/slabinfo.c
index 3f3a2db65794..469ff6157986 100644
--- a/tools/vm/slabinfo.c
+++ b/tools/vm/slabinfo.c
@@ -111,7 +111,7 @@ static void fatal(const char *x, ...)
static void usage(void)
{
printf("slabinfo 4/15/2011. (c) 2007 sgi/(c) 2011 Linux Foundation.\n\n"
- "slabinfo [-aABDefhilLnorsStTUvXz1] [N=K] [-dafzput] [slab-regexp]\n"
+ "slabinfo [-aABDefhilLnoPrsStTUvXz1] [N=K] [-dafzput] [slab-regexp]\n"
"-a|--aliases Show aliases\n"
"-A|--activity Most active slabs first\n"
"-B|--Bytes Show size in bytes\n"
@@ -125,6 +125,7 @@ static void usage(void)
"-n|--numa Show NUMA information\n"
"-N|--lines=K Show the first K slabs\n"
"-o|--ops Show kmem_cache_ops\n"
+ "-P|--partial Sort by number of partial slabs\n"
"-r|--report Detailed report on single slabs\n"
"-s|--shrink Shrink slabs\n"
"-S|--Size Sort by size\n"
@@ -1361,6 +1362,7 @@ struct option opts[] = {
{ "numa", no_argument, NULL, 'n' },
{ "lines", required_argument, NULL, 'N'},
{ "ops", no_argument, NULL, 'o' },
+ { "partial", no_argument, NULL, 'p'},
{ "report", no_argument, NULL, 'r' },
{ "shrink", no_argument, NULL, 's' },
{ "Size", no_argument, NULL, 'S'},
@@ -1382,7 +1384,7 @@ int main(int argc, char *argv[])
page_size = getpagesize();
- while ((c = getopt_long(argc, argv, "aABd::DefhilLnN:orsStTUvXz1",
+ while ((c = getopt_long(argc, argv, "aABd::DefhilLnN:oPrsStTUvXz1",
opts, NULL)) != -1)
switch (c) {
case 'a':
@@ -1436,6 +1438,9 @@ int main(int argc, char *argv[])
case 'r':
show_report = 1;
break;
+ case 'P':
+ sort_partial = 1;
+ break;
case 's':
shrink = 1;
break;