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2b10075539
This patchset adds 'extended' slabinfo mode that provides additional information: -- totals summary -- slabs sorted by size -- slabs sorted by loss (waste) The patches also introduces several new slabinfo options to limit the number of slabs reported, sort slabs by loss (waste); and some fixes. Extended output example (slabinfo -X -N 2): Slabcache Totals ---------------- Slabcaches : 91 Aliases : 119->69 Active: 63 Memory used: 199798784 # Loss : 10689376 MRatio: 5% # Objects : 324301 # PartObj: 18151 ORatio: 5% Per Cache Average Min Max Total ---------------------------------------------------------------------------- #Objects 5147 1 89068 324301 #Slabs 199 1 3886 12537 #PartSlab 12 0 240 778 %PartSlab 32% 0% 100% 6% PartObjs 5 0 4569 18151 % PartObj 26% 0% 100% 5% Memory 3171409 8192 127336448 199798784 Used 3001736 160 121429728 189109408 Loss 169672 0 5906720 10689376 Per Object Average Min Max ----------------------------------------------------------- Memory 585 8 8192 User 583 8 8192 Loss 2 0 64 Slabs sorted by size -------------------- Name Objects Objsize Space Slabs/Part/Cpu O/S O %Fr %Ef Flg ext4_inode_cache 69948 1736 127336448 3871/0/15 18 3 0 95 a dentry 89068 288 26058752 3164/0/17 28 1 0 98 a Slabs sorted by loss -------------------- Name Objects Objsize Loss Slabs/Part/Cpu O/S O %Fr %Ef Flg ext4_inode_cache 69948 1736 5906720 3871/0/15 18 3 0 95 a inode_cache 11628 864 537472 642/0/4 18 2 0 94 a The last patch in the series addresses Linus' comment from http://marc.info/?l=linux-mm&m=144148518703321&w=2 (well, it's been some time. sorry.) gnuplot script takes the slabinfo records file, where every record is a `slabinfo -X' output. So the basic workflow is, for example, as follows: while [ 1 ]; do slabinfo -X -N 2 >> stats; sleep 1; done ^C slabinfo-gnuplot.sh stats The last command will produce 3 png files (and 3 stats files) -- graph of slabinfo totals -- graph of slabs by size -- graph of slabs by loss It's also possible to select a range of records for plotting (a range of collected slabinfo outputs) via `-r 10,100` (for example); and compare totals from several measurements (to visially compare slabs behaviour (10,50 range)) using pre-parsed totals files: slabinfo-gnuplot.sh -r 10,50 -t stats-totals1 .. stats-totals2 This also, technically, supports ktest. Upload new slabinfo to target, collect the stats and give the resulting stats file to slabinfo-gnuplot This patch (of 8): Use getopt constants in `struct option' ->has_arg instead of numerical representations. Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com> Cc: Christoph Lameter <cl@linux.com> Cc: Pekka Enberg <penberg@kernel.org> Cc: David Rientjes <rientjes@google.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
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