Messages in this thread | | | Date | Fri, 10 Apr 2015 18:10:49 -0300 | From | Arnaldo Carvalho de Melo <> | Subject | Re: [PATCH 3/9] perf kmem: Analyze page allocator events also |
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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@ssdandy ~]# > > 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
With that I get:
[root@ssdandy ~]# 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 ... | ... | ... | ... | ... | ... --------------------------------------------------------------------------------
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@ssdandy ~]#
- Arnaldo
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