From: "Tobin C. Harding" <tobin@xxxxxxxxxx> Subject: 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@xxxxxxxxxx Signed-off-by: Tobin C. Harding <tobin@xxxxxxxxxx> Cc: Alexander Duyck <alexander.duyck@xxxxxxxxx> Cc: Brendan Gregg <brendan.d.gregg@xxxxxxxxx>, Cc: Christoph Lameter <cl@xxxxxxxxx> Cc: David Rientjes <rientjes@xxxxxxxxxx> Cc: Jesper Dangaard Brouer <brouer@xxxxxxxxxx> Cc: Joonsoo Kim <iamjoonsoo.kim@xxxxxxx> Cc: Mel Gorman <mgorman@xxxxxxxxxxxxxxxxxxx> Cc: Michal Hocko <mhocko@xxxxxxxxxx> Cc: Pekka Enberg <penberg@xxxxxx> Cc: Qian Cai <cai@xxxxxx> Cc: Tejun Heo <tj@xxxxxxxxxx> Cc: Vlastimil Babka <vbabka@xxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- tools/vm/slabinfo.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) --- a/tools/vm/slabinfo.c~tools-vm-slabinfo-add-option-to-sort-by-partial-slabs +++ a/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; _
