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Date: Mon, 13 Apr 2015 15:59:24 +0900 From: Namhyung Kim <namhyung@...nel.org> To: Arnaldo Carvalho de Melo <acme@...nel.org> Cc: Ingo Molnar <mingo@...nel.org>, Peter Zijlstra <a.p.zijlstra@...llo.nl>, Jiri Olsa <jolsa@...hat.com>, LKML <linux-kernel@...r.kernel.org>, David Ahern <dsahern@...il.com>, Minchan Kim <minchan@...nel.org>, Joonsoo Kim <js1304@...il.com>, linux-mm@...ck.org Subject: Re: [PATCH 3/9] perf kmem: Analyze page allocator events also Hi Arnaldo, On Fri, Apr 10, 2015 at 06:10:49PM -0300, Arnaldo Carvalho de Melo wrote: > Em Fri, Apr 10, 2015 at 06:06:29PM -0300, Arnaldo Carvalho de Melo escreveu: > > Em Mon, Apr 06, 2015 at 02:36:10PM +0900, Namhyung Kim escreveu: > > > The perf kmem command records and analyze kernel memory allocation > > > only for SLAB objects. This patch implement a simple page allocator > > > analyzer using kmem:mm_page_alloc and kmem:mm_page_free events. > > > > > > It adds two new options of --slab and --page. The --slab option is > > > for analyzing SLAB allocator and that's what perf kmem currently does. > > > > > > The new --page option enables page allocator events and analyze kernel > > > memory usage in page unit. Currently, 'stat --alloc' subcommand is > > > implemented only. > > > > > > If none of these --slab nor --page is specified, --slab is implied. > > > > > > # perf kmem stat --page --alloc --line 10 > > > > Hi, applied the first patch, the kernel one, reboot with that kernel: > > <SNIP> > > > [root@...andy ~]# > > > > What am I missing? > > Argh, I was expecting to read just what is in that cset and be able to > reproduce the results, had to go back to the [PATCH 0/0] cover letter to > figure out that I need to run: > > perf kmem record --page sleep 5 Right. Maybe I need to change to print warning if no events found with option. > > With that I get: > > [root@...andy ~]# perf kmem stat --page --alloc --line 20 > > -------------------------------------------------------------------------------- > PFN | Total alloc (KB) | Hits | Order | Mig.type | GFP flags > -------------------------------------------------------------------------------- > 3487838 | 12 | 3 | 0 | UNMOVABL | 00020010 > 3493414 | 8 | 2 | 0 | UNMOVABL | 000284d0 > 3487761 | 4 | 1 | 0 | UNMOVABL | 000202d0 > 3487764 | 4 | 1 | 0 | UNMOVABL | 000202d0 > 3487982 | 4 | 1 | 0 | UNMOVABL | 000202d0 > 3487991 | 4 | 1 | 0 | UNMOVABL | 000284d0 > 3488046 | 4 | 1 | 0 | UNMOVABL | 002284d0 > 3488057 | 4 | 1 | 0 | UNMOVABL | 000200d0 > 3488191 | 4 | 1 | 0 | UNMOVABL | 002284d0 > 3488203 | 4 | 1 | 0 | UNMOVABL | 000202d0 > 3488206 | 4 | 1 | 0 | UNMOVABL | 000202d0 > 3488210 | 4 | 1 | 0 | UNMOVABL | 000202d0 > 3488211 | 4 | 1 | 0 | UNMOVABL | 000202d0 > 3488213 | 4 | 1 | 0 | UNMOVABL | 000202d0 > 3488215 | 4 | 1 | 0 | UNMOVABL | 000202d0 > 3488298 | 4 | 1 | 0 | UNMOVABL | 000202d0 > 3488325 | 4 | 1 | 0 | UNMOVABL | 000202d0 > 3488326 | 4 | 1 | 0 | UNMOVABL | 000202d0 > 3488327 | 4 | 1 | 0 | UNMOVABL | 000202d0 > 3488329 | 4 | 1 | 0 | UNMOVABL | 000202d0 > ... | ... | ... | ... | ... | ... > -------------------------------------------------------------------------------- Hmm.. looks like you ran some old version. Please check v6! :) Thanks, Namhyung > > SUMMARY (page allocator) > ======================== > Total allocation requests : 166 [ 664 KB ] > Total free requests : 239 [ 956 KB ] > > Total alloc+freed requests : 49 [ 196 KB ] > Total alloc-only requests : 117 [ 468 KB ] > Total free-only requests : 190 [ 760 KB ] > > Total allocation failures : 0 [ 0 KB ] > > Order Unmovable Reclaimable Movable Reserved CMA/Isolated > ----- ------------ ------------ ------------ ------------ ------------ > 0 143 . 23 . . > 1 . . . . . > 2 . . . . . > 3 . . . . . > 4 . . . . . > 5 . . . . . > 6 . . . . . > 7 . . . . . > 8 . . . . . > 9 . . . . . > 10 . . . . . > [root@...andy ~]# > > - Arnaldo > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@...r.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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