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tools/vm/slabinfo: order command line options 

During recent discussion on LKML over SLAB vs SLUB it was suggested by
Jesper that it would be nice to have a tool to view the current
fragmentation of the slab allocators.  CC list for this set is taken
from that thread.

For SLUB we have all the information for this already exposed by the
kernel and also we have a userspace tool for displaying this info:

	tools/vm/slabinfo.c

Extend slabinfo to improve the fragmentation information by enabling
sorting of caches by number of partial slabs.

Also add cache list sorted in this manner to the output of `slabinfo -X`.

This patch (of 4):

get_opt() has a spurious character within the option string.  Remove it
and reorder the options in alphabetic order so that it is easier to keep
the options correct.  Use the same ordering for command help output and
long option handling code.

Link: http://lkml.kernel.org/r/20190426022622.4089-2-tobin@kernel.org
Signed-off-by: Tobin C. Harding <tobin@kernel.org>
Cc: Jesper Dangaard Brouer <brouer@redhat.com>
Cc: Pekka Enberg <penberg@iki.fi>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Christoph Lameter <cl@linux.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Tejun Heo <tj@kernel.org>
Cc: Qian Cai <cai@lca.pw>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Alexander Duyck <alexander.duyck@gmail.com>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Brendan Gregg <brendan.d.gregg@gmail.com>,
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Tobin C. Harding 2019-07-11 20:59:34 -07:00 committed by Linus Torvalds
parent 98879b3b9e
commit d914999689
1 changed files with 35 additions and 35 deletions
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70
tools/vm/slabinfo.c
View File

@ -110,7 +110,7 @@ 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 [-aADefhilnosrStTvz1LXBU] [N=K] [-dafzput] [slab-regexp]\n"
"slabinfo [-aABDefhilLnorsStTUvXz1] [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"
@ -131,9 +131,9 @@ static void usage(void)
"-T|--Totals Show summary information\n"
"-U|--Unreclaim Show unreclaimable slabs only\n"
"-v|--validate Validate slabs\n"
"-X|--Xtotals Show extended summary information\n"
"-z|--zero Include empty slabs\n"
"-1|--1ref Single reference\n"
"-X|--Xtotals Show extended summary information\n"
"\n"
"-d | --debug Switch off all debug options\n"
@ -1334,6 +1334,7 @@ static void xtotals(void)
struct option opts[] = {
{ "aliases", no_argument, NULL, 'a' },
{ "activity", no_argument, NULL, 'A' },
{ "Bytes", no_argument, NULL, 'B'},
{ "debug", optional_argument, NULL, 'd' },
{ "display-activity", no_argument, NULL, 'D' },
{ "empty", no_argument, NULL, 'e' },
@ -1341,21 +1342,20 @@ struct option opts[] = {
{ "help", no_argument, NULL, 'h' },
{ "inverted", no_argument, NULL, 'i'},
{ "slabs", no_argument, NULL, 'l' },
{ "Loss", no_argument, NULL, 'L'},
{ "numa", no_argument, NULL, 'n' },
{ "lines", required_argument, NULL, 'N'},
{ "ops", no_argument, NULL, 'o' },
{ "shrink", no_argument, NULL, 's' },
{ "report", no_argument, NULL, 'r' },
{ "shrink", no_argument, NULL, 's' },
{ "Size", no_argument, NULL, 'S'},
{ "tracking", no_argument, NULL, 't'},
{ "Totals", no_argument, NULL, 'T'},
{ "Unreclaim", no_argument, NULL, 'U'},
{ "validate", no_argument, NULL, 'v' },
{ "Xtotals", no_argument, NULL, 'X'},
{ "zero", no_argument, NULL, 'z' },
{ "1ref", no_argument, NULL, '1'},
{ "lines", required_argument, NULL, 'N'},
{ "Loss", no_argument, NULL, 'L'},
{ "Xtotals", no_argument, NULL, 'X'},
{ "Bytes", no_argument, NULL, 'B'},
{ "Unreclaim", no_argument, NULL, 'U'},
{ NULL, 0, NULL, 0 }
};
@ -1367,18 +1367,18 @@ int main(int argc, char *argv[])
page_size = getpagesize();
while ((c = getopt_long(argc, argv, "aAd::Defhil1noprstvzTSN:LXBU",
while ((c = getopt_long(argc, argv, "aABd::DefhilLnN:orsStTUvXz1",
opts, NULL)) != -1)
switch (c) {
case '1':
show_single_ref = 1;
break;
case 'a':
show_alias = 1;
break;
case 'A':
sort_active = 1;
break;
case 'B':
show_bytes = 1;
break;
case 'd':
set_debug = 1;
if (!debug_opt_scan(optarg))
@ -1399,9 +1399,22 @@ int main(int argc, char *argv[])
case 'i':
show_inverted = 1;
break;
case 'l':
show_slab = 1;
break;
case 'L':
sort_loss = 1;
break;
case 'n':
show_numa = 1;
break;
case 'N':
if (optarg) {
output_lines = atoi(optarg);
if (output_lines < 1)
output_lines = 1;
}
break;
case 'o':
show_ops = 1;
break;
@ -1411,33 +1424,20 @@ int main(int argc, char *argv[])
case 's':
shrink = 1;
break;
case 'l':
show_slab = 1;
case 'S':
sort_size = 1;
break;
case 't':
show_track = 1;
break;
case 'v':
validate = 1;
break;
case 'z':
skip_zero = 0;
break;
case 'T':
show_totals = 1;
break;
case 'S':
sort_size = 1;
case 'U':
unreclaim_only = 1;
break;
case 'N':
if (optarg) {
output_lines = atoi(optarg);
if (output_lines < 1)
output_lines = 1;
}
break;
case 'L':
sort_loss = 1;
case 'v':
validate = 1;
break;
case 'X':
if (output_lines == -1)
@ -1445,11 +1445,11 @@ int main(int argc, char *argv[])
extended_totals = 1;
show_bytes = 1;
break;
case 'B':
show_bytes = 1;
case 'z':
skip_zero = 0;
break;
case 'U':
unreclaim_only = 1;
case '1':
show_single_ref = 1;
break;
default:
fatal("%s: Invalid option '%c'\n", argv[0], optopt);