linux/tools/vm, branch v4.6

tools/vm/page-types.c: avoid memset() in walk_pfn() when count == 1

2016-03-17T22:09:34Z

I found that page-types is very slow and my testing shows many timeout errors. Here's an example with a simple program allocating 1000 thps. $ time ./page-types -p $(pgrep -f test_alloc) ... real 0m17.201s user 0m16.889s sys 0m0.312s Most of time is spent in memset(). Currently memset() clears over whole buffer for every walk_pfn() call, which is inefficient when walk_pfn() is called from walk_vma(), because in that case walk_pfn() is called for each pfn. So this patch limits the zero initialization only for the first element. $ time ./page-types.patched -p $(pgrep -f test_alloc) ... real 0m0.182s user 0m0.046s sys 0m0.135s Fixes: 954e95584579 ("tools/vm/page-types.c: add memory cgroup dumping and filtering") Signed-off-by: Naoya Horiguchi Suggested-by: Konstantin Khlebnikov Cc: Vladimir Davydov Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

tools/vm/page-types.c: add memory cgroup dumping and filtering

2016-03-17T22:09:34Z

This adds two command line keys: -c|--cgroup path|@inode Walk only pages owned by this memory cgroup -C|--list-cgroup Show memory cgroup inodes [vdavydov@virtuozzo.com: opt_cgroup should be uint64_t. Fix conflicts with "tools/vm/page-types.c: support swap entry"] Signed-off-by: Konstantin Khlebnikov Cc: Naoya Horiguchi Reviewed-by: Vladimir Davydov Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

tools/vm/page-types.c: support swap entry

2016-03-17T22:09:34Z

/proc/pid/pagemap (pte_to_pagemap_entry() internally) already reports about swap entry, so let's make the in-kernel utility aware of it. Signed-off-by: Naoya Horiguchi Cc: Vladimir Davydov Cc: Konstantin Khlebnikov Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

slub: convert SLAB_DEBUG_FREE to SLAB_CONSISTENCY_CHECKS

2016-03-15T23:55:16Z

SLAB_DEBUG_FREE allows expensive consistency checks at free to be turned on or off. Expand its use to be able to turn off all consistency checks. This gives a nice speed up if you only want features such as poisoning or tracing. Credit to Mathias Krause for the original work which inspired this series Signed-off-by: Laura Abbott Acked-by: Christoph Lameter Cc: Pekka Enberg Cc: David Rientjes Cc: Joonsoo Kim Cc: Kees Cook Cc: Mathias Krause Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

tools/vm/page-types.c: support KPF_IDLE

2015-11-21T00:17:32Z

PageIdle is exported in include/uapi/linux/kernel-page-flags.h, so let's make page-types.c tool handle it. Signed-off-by: Naoya Horiguchi Reviewed-by: Vladimir Davydov Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

tools/vm/slabinfo: gnuplot slabifo extended stat

2015-11-06T03:34:48Z

GNUplot `slabinfo -X' stats, collected, for example, using the following command: while [ 1 ]; do slabinfo -X >> stats; sleep 1; done `slabinfo-gnuplot.sh stats' pre-processes collected records and generate graphs (totals, slabs sorted by size, slabs sorted by size). Graphs can be [individually] regenerate with different samples range and graph width-heigh (-r %d,%d and -s %d,%d options). To visually compare N `totals' graphs: slabinfo-gnuplot.sh -t FILE1-totals FILE2-totals ... FILEN-totals Signed-off-by: Sergey Senozhatsky Cc: Christoph Lameter Cc: Pekka Enberg Cc: David Rientjes Cc: Joonsoo Kim Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

tools/vm/slabinfo: cosmetic globals cleanup

2015-11-06T03:34:48Z

checkpatch.pl complains about globals being explicitly zeroed out: "ERROR: do not initialise globals to 0 or NULL". New globals, introduced in this patch set, have no explicit 0 initialization; clean up the old ones to make it less hairy. Signed-off-by: Sergey Senozhatsky Cc: Christoph Lameter Cc: Pekka Enberg Cc: David Rientjes Cc: Joonsoo Kim Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

tools/vm/slabinfo: output sizes in bytes

2015-11-06T03:34:48Z

Introduce "-B|--Bytes" opt to disable store_size() dynamic size scaling and report size in bytes instead. This `expands' the interface a bit, it's impossible to use printf("%6s") anymore to output sizes. 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 Besides, store_size() does not use powers of two for G/M/K if (value > 1000000000UL) { divisor = 100000000UL; trailer = 'G'; } else if (value > 1000000UL) { divisor = 100000UL; trailer = 'M'; } else if (value > 1000UL) { divisor = 100; trailer = 'K'; } Signed-off-by: Sergey Senozhatsky Cc: Christoph Lameter Cc: Pekka Enberg Cc: David Rientjes Cc: Joonsoo Kim Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

tools/vm/slabinfo: introduce extended totals mode

2015-11-06T03:34:48Z

Add "-X|--Xtotals" opt to output extended totals summary, which includes: -- totals summary -- slabs sorted by size -- slabs sorted by loss (waste) Example: ======= slabinfo --X -N 1 Slabcache Totals ---------------- Slabcaches : 91 Aliases : 120->69 Active: 65 Memory used: 568.3M # Loss : 30.4M MRatio: 5% # Objects : 920.1K # PartObj: 161.2K ORatio: 17% Per Cache Average Min Max Total --------------------------------------------------------- #Objects 14.1K 1 227.8K 920.1K #Slabs 533 1 11.7K 34.7K #PartSlab 86 0 4.3K 5.6K %PartSlab 24% 0% 100% 16% PartObjs 17 0 129.3K 161.2K % PartObj 17% 0% 100% 17% Memory 8.7M 8.1K 384.7M 568.3M Used 8.2M 160 366.5M 537.9M Loss 468.8K 0 18.2M 30.4M Per Object Average Min Max --------------------------------------------- Memory 587 8 8.1K User 584 8 8.1K Loss 2 0 64 Slabs sorted by size ---------------------- Name Objects Objsize Space Slabs/Part/Cpu O/S O %Fr %Ef Flg ext4_inode_cache 211142 1736 384.7M 11732/40/10 18 3 0 95 a Slabs sorted by loss ---------------------- Name Objects Objsize Loss Slabs/Part/Cpu O/S O %Fr %Ef Flg ext4_inode_cache 211142 1736 18.2M 11732/40/10 18 3 0 95 a Signed-off-by: Sergey Senozhatsky Cc: Christoph Lameter Cc: Pekka Enberg Cc: David Rientjes Cc: Joonsoo Kim Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

tools/vm/slabinfo: fix alternate opts names

2015-11-06T03:34:48Z

Fix mismatches between usage() output and real opts[] options. Add missing alternative opt names, e.g., '-S' had no '--Size' opts[] entry, etc. Signed-off-by: Sergey Senozhatsky Cc: Christoph Lameter Cc: Pekka Enberg Cc: David Rientjes Cc: Joonsoo Kim Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds