From: Janani Ravichandran <janani.rvchndrn@gmail.com> To: linux-mm@kvack.org, linux-kernel@vger.kernel.org Cc: riel@surriel.com, akpm@linux-foundation.org, hannes@cmpxchg.org, vdavydov@virtuozzo.com, mhocko@suse.com, vbabka@suse.cz, mgorman@techsingularity.net, kirill.shutemov@linux.intel.com, bywxiaobai@163.com Subject: [PATCH 0/3] Add names of shrinkers and have tracepoints display them Date: Sat, 9 Jul 2016 04:33:59 -0400 [thread overview] Message-ID: <cover.1468051277.git.janani.rvchndrn@gmail.com> (raw) Hello, I'm an Outreachy intern working under Rik van Riel. My project is about latency tracing during memory allocation. The idea is to use tracepoints, both existing and new, to derive higher level information on memory allocation and identify where time was spent. This patchset which 1, adds a new field to struct shrinker to hold names of shrinkers, 2, updates the newly added field in instances of the struct, 3, changes tracepoint definitions to have the field displayed, would be useful when one wants to observe which shrinkers contributed to excessive latencies. A post processing script like the one here- https://github.com/Jananiravichandran/Analyzing-tracepoints/blob/master/shrink_slab_latencies.py , can use the new information this patchset adds to see which shrinkers were invoked and how long each of them took. Sample output: i915_gem_shrinker : 0.166 ms ext4_es_shrinker : 0.954 ms workingset_shadow_shrinker : 1.091 ms deferred_split_shrinker : 6.043 ms super_cache_shrinker : 84.218 ms total time spent in shrinkers = 92.472 ms This shows the various shrinkers called and the times spent. Janani Ravichandran (3): Add a new field to struct shrinker Update name field for all shrinker instances Add name fields in shrinker tracepoint definitions arch/x86/kvm/mmu.c | 1 + drivers/gpu/drm/i915/i915_gem_shrinker.c | 1 + drivers/gpu/drm/ttm/ttm_page_alloc.c | 1 + drivers/gpu/drm/ttm/ttm_page_alloc_dma.c | 1 + drivers/md/bcache/btree.c | 1 + drivers/md/dm-bufio.c | 1 + drivers/md/raid5.c | 1 + drivers/staging/android/ashmem.c | 1 + drivers/staging/android/ion/ion_heap.c | 1 + drivers/staging/android/lowmemorykiller.c | 1 + drivers/staging/lustre/lustre/ldlm/ldlm_pool.c | 1 + drivers/staging/lustre/lustre/obdclass/lu_object.c | 1 + drivers/staging/lustre/lustre/ptlrpc/sec_bulk.c | 1 + fs/ext4/extents_status.c | 1 + fs/f2fs/super.c | 1 + fs/gfs2/glock.c | 1 + fs/gfs2/quota.c | 1 + fs/mbcache.c | 1 + fs/nfs/super.c | 1 + fs/nfsd/nfscache.c | 1 + fs/quota/dquot.c | 1 + fs/super.c | 1 + fs/ubifs/super.c | 1 + fs/xfs/xfs_buf.c | 1 + fs/xfs/xfs_qm.c | 1 + include/linux/shrinker.h | 1 + include/trace/events/vmscan.h | 10 ++++++++-- mm/huge_memory.c | 2 ++ mm/workingset.c | 1 + mm/zsmalloc.c | 1 + net/sunrpc/auth.c | 1 + 31 files changed, 39 insertions(+), 2 deletions(-) -- 2.7.0
WARNING: multiple messages have this Message-ID (diff)
From: Janani Ravichandran <janani.rvchndrn@gmail.com> To: linux-mm@kvack.org, linux-kernel@vger.kernel.org Cc: riel@surriel.com, akpm@linux-foundation.org, hannes@cmpxchg.org, vdavydov@virtuozzo.com, mhocko@suse.com, vbabka@suse.cz, mgorman@techsingularity.net, kirill.shutemov@linux.intel.com, bywxiaobai@163.com Subject: [PATCH 0/3] Add names of shrinkers and have tracepoints display them Date: Sat, 9 Jul 2016 04:33:59 -0400 [thread overview] Message-ID: <cover.1468051277.git.janani.rvchndrn@gmail.com> (raw) Hello, I'm an Outreachy intern working under Rik van Riel. My project is about latency tracing during memory allocation. The idea is to use tracepoints, both existing and new, to derive higher level information on memory allocation and identify where time was spent. This patchset which 1, adds a new field to struct shrinker to hold names of shrinkers, 2, updates the newly added field in instances of the struct, 3, changes tracepoint definitions to have the field displayed, would be useful when one wants to observe which shrinkers contributed to excessive latencies. A post processing script like the one here- https://github.com/Jananiravichandran/Analyzing-tracepoints/blob/master/shrink_slab_latencies.py , can use the new information this patchset adds to see which shrinkers were invoked and how long each of them took. Sample output: i915_gem_shrinker : 0.166 ms ext4_es_shrinker : 0.954 ms workingset_shadow_shrinker : 1.091 ms deferred_split_shrinker : 6.043 ms super_cache_shrinker : 84.218 ms total time spent in shrinkers = 92.472 ms This shows the various shrinkers called and the times spent. Janani Ravichandran (3): Add a new field to struct shrinker Update name field for all shrinker instances Add name fields in shrinker tracepoint definitions arch/x86/kvm/mmu.c | 1 + drivers/gpu/drm/i915/i915_gem_shrinker.c | 1 + drivers/gpu/drm/ttm/ttm_page_alloc.c | 1 + drivers/gpu/drm/ttm/ttm_page_alloc_dma.c | 1 + drivers/md/bcache/btree.c | 1 + drivers/md/dm-bufio.c | 1 + drivers/md/raid5.c | 1 + drivers/staging/android/ashmem.c | 1 + drivers/staging/android/ion/ion_heap.c | 1 + drivers/staging/android/lowmemorykiller.c | 1 + drivers/staging/lustre/lustre/ldlm/ldlm_pool.c | 1 + drivers/staging/lustre/lustre/obdclass/lu_object.c | 1 + drivers/staging/lustre/lustre/ptlrpc/sec_bulk.c | 1 + fs/ext4/extents_status.c | 1 + fs/f2fs/super.c | 1 + fs/gfs2/glock.c | 1 + fs/gfs2/quota.c | 1 + fs/mbcache.c | 1 + fs/nfs/super.c | 1 + fs/nfsd/nfscache.c | 1 + fs/quota/dquot.c | 1 + fs/super.c | 1 + fs/ubifs/super.c | 1 + fs/xfs/xfs_buf.c | 1 + fs/xfs/xfs_qm.c | 1 + include/linux/shrinker.h | 1 + include/trace/events/vmscan.h | 10 ++++++++-- mm/huge_memory.c | 2 ++ mm/workingset.c | 1 + mm/zsmalloc.c | 1 + net/sunrpc/auth.c | 1 + 31 files changed, 39 insertions(+), 2 deletions(-) -- 2.7.0 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
next reply other threads:[~2016-07-09 8:35 UTC|newest] Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top 2016-07-09 8:33 Janani Ravichandran [this message] 2016-07-09 8:33 ` [PATCH 0/3] Add names of shrinkers and have tracepoints display them Janani Ravichandran 2016-07-09 8:43 ` [PATCH 1/3] Add a new field to struct shrinker Janani Ravichandran 2016-07-09 8:43 ` Janani Ravichandran 2016-07-11 6:37 ` Michal Hocko 2016-07-11 6:37 ` Michal Hocko 2016-07-11 14:12 ` Rik van Riel 2016-07-11 14:33 ` Michal Hocko 2016-07-11 14:33 ` Michal Hocko 2016-07-20 14:41 ` Janani Ravichandran 2016-07-20 14:41 ` Janani Ravichandran 2016-07-20 14:54 ` Michal Hocko 2016-07-20 14:54 ` Michal Hocko 2016-07-23 1:27 ` Tony Jones 2016-07-23 1:27 ` Tony Jones 2016-07-23 4:05 ` Tony Jones 2016-07-23 4:05 ` Tony Jones 2016-07-23 19:43 ` Rik van Riel 2016-07-23 23:21 ` Tony Jones 2016-07-23 23:21 ` Tony Jones 2016-07-26 16:40 ` Tony Jones 2016-07-26 16:40 ` Tony Jones 2016-07-28 5:49 ` Dave Chinner 2016-07-28 5:49 ` Dave Chinner 2016-07-28 10:25 ` Mel Gorman 2016-07-28 10:25 ` Mel Gorman 2016-07-29 0:13 ` Dave Chinner 2016-07-29 0:13 ` Dave Chinner 2016-07-29 13:00 ` Mel Gorman 2016-07-29 13:00 ` Mel Gorman 2016-08-12 3:09 ` Tony Jones 2016-08-12 3:09 ` Tony Jones 2016-07-09 8:52 ` [PATCH 2/3] Update name field for all shrinker instances Janani Ravichandran 2016-07-09 8:52 ` Janani Ravichandran 2016-07-13 0:43 ` Tony Jones 2016-07-13 0:43 ` Tony Jones 2016-07-09 9:05 ` [PATCH 3/3] Add name fields in shrinker tracepoint definitions Janani Ravichandran 2016-07-09 9:05 ` Janani Ravichandran 2016-07-09 9:45 ` kbuild test robot 2016-07-09 16:18 ` Janani Ravichandran 2016-07-11 14:18 ` Vlastimil Babka 2016-07-11 14:18 ` Vlastimil Babka 2016-07-13 0:35 ` Tony Jones 2016-07-13 0:35 ` Tony Jones 2016-07-13 6:16 ` Janani Ravichandran 2016-07-13 6:16 ` Janani Ravichandran 2016-07-13 19:12 ` Tony Jones 2016-07-13 19:12 ` Tony Jones 2016-07-13 19:48 ` Rik van Riel
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