[ARM] f9ff907b0af: -100.0% slabinfo.cfq_queue.num_objs
by Jet Chen
TO: Rabin Vincent <rabin(a)rab.in>
CC: Russell King <rmk+kernel(a)arm.linux.org.uk>
CC: LKML <linux-kernel(a)vger.kernel.org>
CC: lkp(a)01.org
FYI, we noticed the below changes on
git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
commit f9ff907b0af561dcde4683f7c9f71dc0f41d3be3 ("ARM: 8048/1: fix v7-M setup stack location")
test case: lkp-st02/dd-write/11HDD-RAID5-cfq-ext4-1dd
v3.15-rc6 f9ff907b0af561dcde4683f7c
--------------- -------------------------
273 ~ 3% -100.0% 0 ~ 0% TOTAL slabinfo.cfq_queue.num_objs
65541468 ~ 1% -100.0% 0 ~ 0% TOTAL ftrace.balance_dirty_pages.md0.time
273 ~ 3% -100.0% 0 ~ 0% TOTAL slabinfo.cfq_queue.active_objs
969 ~ 8% -100.0% 0 ~ 0% TOTAL slabinfo.ip6_dst_cache.num_objs
948 ~ 8% -100.0% 0 ~ 0% TOTAL slabinfo.ip6_dst_cache.active_objs
12399 ~ 1% -100.0% 0 ~ 0% TOTAL ftrace.bdi_dirty_ratelimit.md0.balanced_dirty_ratelimit
14234 ~ 2% -100.0% 0 ~ 0% TOTAL ftrace.bdi_dirty_ratelimit.md0.task_ratelimit
10649 ~ 1% -100.0% 0 ~ 0% TOTAL ftrace.bdi_dirty_ratelimit.md0.dirty_ratelimit
17409 ~ 2% -100.0% 0 ~ 0% TOTAL ftrace.bdi_dirty_ratelimit.md0.dirty_rate
13787 ~ 1% -100.0% 0 ~ 0% TOTAL ftrace.bdi_dirty_ratelimit.md0.awrite_bw
14464 ~ 1% -100.0% 0 ~ 0% TOTAL ftrace.bdi_dirty_ratelimit.md0.write_bw
65322936 ~ 1% -100.0% 0 ~ 0% TOTAL ftrace.bdi_dirty_ratelimit.md0.time
31 ~ 3% -100.0% 0 ~ 0% TOTAL ftrace.balance_dirty_pages.md0.dirtied_pause
31 ~ 3% -100.0% 0 ~ 0% TOTAL ftrace.balance_dirty_pages.md0.dirtied
14350 ~ 1% -100.0% 0 ~ 0% TOTAL ftrace.balance_dirty_pages.md0.task_ratelimit
10633 ~ 1% -100.0% 0 ~ 0% TOTAL ftrace.balance_dirty_pages.md0.dirty_ratelimit
13720 ~ 1% -100.0% 0 ~ 0% TOTAL ftrace.balance_dirty_pages.md0.bdi_dirty
15220 ~ 1% -100.0% 0 ~ 0% TOTAL ftrace.balance_dirty_pages.md0.bdi_setpoint
13720 ~ 1% -100.0% 0 ~ 0% TOTAL ftrace.balance_dirty_pages.md0.dirty
15251 ~ 1% -100.0% 0 ~ 0% TOTAL ftrace.balance_dirty_pages.md0.setpoint
17638 ~ 1% -100.0% 0 ~ 0% TOTAL ftrace.balance_dirty_pages.md0.limit
36455 ~ 0% +221.6% 117256 ~ 0% TOTAL proc-vmstat.unevictable_pgs_culled
986338 ~ 0% -55.5% 438629 ~ 0% TOTAL meminfo.Unevictable
246584 ~ 0% -55.5% 109657 ~ 0% TOTAL proc-vmstat.nr_unevictable
84787 ~20% -47.1% 44851 ~10% TOTAL meminfo.DirectMap4k
11266582 ~ 1% -38.7% 6903348 ~ 0% TOTAL ftrace.writeback_single_inode.md0.index
10996 ~ 9% -25.9% 8143 ~14% TOTAL meminfo.AnonHugePages
1127 ~ 2% +29.8% 1462 ~ 1% TOTAL slabinfo.ftrace_event_file.num_objs
1127 ~ 2% +29.8% 1462 ~ 1% TOTAL slabinfo.ftrace_event_file.active_objs
1.47 ~12% -20.7% 1.17 ~ 7% TOTAL perf-profile.cpu-cycles.do_get_write_access.jbd2_journal_get_write_access.__ext4_journal_get_write_access.ext4_reserve_inode_write.ext4_mark_inode_dirty
15826442 ~ 0% -15.5% 13381229 ~ 0% TOTAL ftrace.global_dirty_state.written
15944180 ~ 0% -15.3% 13502162 ~ 0% TOTAL ftrace.global_dirty_state.dirtied
2906 ~ 1% +14.0% 3314 ~ 1% TOTAL slabinfo.shared_policy_node.active_objs
2906 ~ 1% +14.0% 3314 ~ 1% TOTAL slabinfo.shared_policy_node.num_objs
348891 ~ 0% +14.4% 399046 ~ 0% TOTAL ftrace.global_dirty_state.limit
394528 ~ 0% +11.8% 441163 ~ 0% TOTAL meminfo.MemFree
98671 ~ 0% +11.8% 110310 ~ 0% TOTAL proc-vmstat.nr_free_pages
400850 ~ 0% +11.0% 444838 ~ 0% TOTAL vmstat.memory.free
108208 ~ 0% +11.0% 120084 ~ 0% TOTAL proc-vmstat.nr_dirty
432868 ~ 0% +11.0% 480357 ~ 0% TOTAL meminfo.Dirty
79363 ~ 1% -8.9% 72291 ~ 0% TOTAL proc-vmstat.workingset_nodereclaim
65550 ~ 2% -9.1% 59612 ~ 1% TOTAL softirqs.SCHED
12.06 ~ 5% +530.1% 75.99 ~ 8% TOTAL iostat.sdd.rrqm/s
50.78 ~ 5% +530.2% 320.04 ~ 8% TOTAL iostat.sdd.rkB/s
12.29 ~ 5% +520.0% 76.21 ~ 7% TOTAL iostat.sde.rrqm/s
51.66 ~ 5% +520.9% 320.74 ~ 7% TOTAL iostat.sde.rkB/s
49.28 ~ 6% +542.9% 316.82 ~ 7% TOTAL iostat.sdc.rkB/s
53.30 ~ 6% +498.9% 319.26 ~ 7% TOTAL iostat.sdf.rkB/s
12.62 ~ 5% +496.4% 75.27 ~ 6% TOTAL iostat.sdg.rrqm/s
53.21 ~ 5% +496.2% 317.20 ~ 6% TOTAL iostat.sdg.rkB/s
12.37 ~ 4% +509.6% 75.41 ~ 7% TOTAL iostat.sdh.rrqm/s
51.89 ~ 4% +511.8% 317.47 ~ 7% TOTAL iostat.sdh.rkB/s
12.60 ~ 5% +500.9% 75.73 ~ 8% TOTAL iostat.sdi.rrqm/s
52.95 ~ 5% +502.2% 318.87 ~ 8% TOTAL iostat.sdi.rkB/s
12.88 ~ 5% +491.9% 76.26 ~ 8% TOTAL iostat.sdj.rrqm/s
54.51 ~ 5% +490.0% 321.59 ~ 8% TOTAL iostat.sdj.rkB/s
12.69 ~ 6% +501.6% 76.35 ~ 8% TOTAL iostat.sdk.rrqm/s
53.90 ~ 6% +497.5% 322.02 ~ 8% TOTAL iostat.sdk.rkB/s
12.69 ~ 5% +501.4% 76.33 ~ 8% TOTAL iostat.sdl.rrqm/s
53.93 ~ 5% +497.4% 322.15 ~ 8% TOTAL iostat.sdl.rkB/s
50.24 ~ 4% +536.4% 319.69 ~ 8% TOTAL iostat.sdb.rkB/s
11.94 ~ 4% +535.0% 75.84 ~ 8% TOTAL iostat.sdb.rrqm/s
11.70 ~ 6% +542.7% 75.21 ~ 7% TOTAL iostat.sdc.rrqm/s
12.68 ~ 7% +498.0% 75.82 ~ 7% TOTAL iostat.sdf.rrqm/s
332 ~ 0% +41.9% 471 ~ 0% TOTAL iostat.md0.avgrq-sz
3616709 ~ 1% -28.9% 2573038 ~ 1% TOTAL perf-stat.context-switches
51043 ~ 1% +10.4% 56342 ~ 3% TOTAL perf-stat.cpu-migrations
6.45e+11 ~ 0% -6.7% 6.021e+11 ~ 0% TOTAL perf-stat.dTLB-loads
758 ~ 0% -5.9% 713 ~ 0% TOTAL iostat.md0.w/s
Legend:
~XX% - stddev percent
[+-]XX% - change percent
Disclaimer:
Results have been estimated based on internal Intel analysis and are provided
for informational purposes only. Any difference in system hardware or software
design or configuration may affect actual performance.
Thanks,
Jet
6 years, 1 month
[jet.chen@intel.com: [bio] kernel BUG at drivers/block/virtio_blk.c:166!]
by Maurizio Lombardi
Hi Jens,
looks like that commit 3979ef4dcf3d1de55a560a3a4016c30a835df44d ("bio-modify-__bio_add_page-to-accept-pages-that-dont-start-a-new-segment-v3")
introduces a regression, as reported by Jet Chan.
Do you have any idea about the possible problem with this patch?
it is the one that performs a recount of the segments in case of failure in __bio_add_page()
http://www.spinics.net/lists/mm-commits/msg103684.html
I would not be surprised if the bug was introduced by fceb38f36f, because it
contained a mystake that commit 3979ef4dcf supposedly fixed.
But learning that commit 3979ef4dcf is introducing a regression leaves
me quite puzzled.
Thanks,
Maurizio Lombardi
6 years, 1 month
[vfs] 662aa027bda: -7.2% will-it-scale.scalability
by Jet Chen
Hi Miklos,
FYI, we noticed the below changes on
git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs.git overlayfs.v22
commit 662aa027bdaa082aa3dd21886830c97a1dd4c184 ("vfs: add RENAME_WHITEOUT")
test case: lkp-wsx01/will-it-scale/lseek2
9f498c77b4332b4 662aa027bdaa082aa3dd21886
--------------- -------------------------
0.63 ~ 0% -7.2% 0.58 ~ 0% TOTAL will-it-scale.scalability
12861563 ~ 0% -1.1% 12715565 ~ 0% TOTAL will-it-scale.per_process_ops
958 ~11% -16.9% 796 ~18% TOTAL numa-meminfo.node3.PageTables
3013 ~11% +20.9% 3643 ~ 4% TOTAL numa-vmstat.node2.nr_slab_reclaimable
12055 ~11% +20.9% 14574 ~ 4% TOTAL numa-meminfo.node2.SReclaimable
1734 ~ 5% -10.6% 1550 ~ 4% TOTAL slabinfo.sock_inode_cache.active_objs
1734 ~ 5% -10.6% 1550 ~ 4% TOTAL slabinfo.sock_inode_cache.num_objs
Legend:
~XX% - stddev percent
[+-]XX% - change percent
will-it-scale.scalability
0.63 ++----*---------*--------------*---*--------------*--*--*------------+
| .*. *...*. *..*..*.. + : .*. *..* |
0.62 *+ + : *..*. |
| * : .. |
| * |
0.61 ++ |
| |
0.6 ++ |
| |
0.59 ++ |
| O O O |
| O O O O O O O O O O O O O O
0.58 O+ O O O O |
| O |
0.57 ++-------------------------------------------------------------------+
[*] bisect-good sample
[O] bisect-bad sample
Thanks,
Jet
6 years, 1 month
[bio] kernel BUG at drivers/block/virtio_blk.c:166!
by Jet Chen
Hi Maurizio,
FYI, we noticed the below changes on
commit 3979ef4dcf3d1de55a560a3a4016c30a835df44d ("bio-modify-__bio_add_page-to-accept-pages-that-dont-start-a-new-segment-v3")
+------------------------------------------+------------+------------+
| | fceb38f36f | 3979ef4dcf |
+------------------------------------------+------------+------------+
| boot_successes | 25 | 10 |
| boot_failures | 0 | 6 |
| kernel_BUG_at_drivers/block/virtio_blk.c | 0 | 6 |
| invalid_opcode | 0 | 6 |
| RIP:virtio_queue_rq | 0 | 6 |
| Kernel_panic-not_syncing:Fatal_exception | 0 | 6 |
| backtrace:blk_mq_work_fn | 0 | 6 |
| kernel_BUG_at_arch/x86/mm/pageattr.c | 0 | 3 |
| RIP:change_page_attr_set_clr | 0 | 3 |
+------------------------------------------+------------+------------+
[ 725.907416] EXT4-fs (vda): mounted filesystem with ordered data mode. Opts: acl,user_xattr
[ 728.625269] EXT4-fs (vdd): mounted filesystem without journal. Opts: acl,user_xattr,noload
[ 729.053064] ------------[ cut here ]------------
[ 729.053181] kernel BUG at drivers/block/virtio_blk.c:166!
[ 729.053181] invalid opcode: 0000 [#1] SMP [ 729.053181] Modules linked in: ext4 mbcache jbd2 dm_mod fuse sg sr_mod cdrom ata_generic pata_acpi floppy parport_pc snd_pcm parport snd_timer cirrus syscopyarea sysfillrect snd sysimgblt ttm drm_kms_helper soundcore drm pcspkr ata_piix libata i2c_piix4
[ 729.053181] CPU: 0 PID: 1645 Comm: kworker/0:1H Not tainted 3.15.0-rc5-next-20140521 #1
[ 729.053181] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 729.053181] task: ffff880119add880 ti: ffff880103264000 task.ti: ffff880103264000
[ 729.053181] RIP: 0010:[<ffffffff81425b27>] [<ffffffff81425b27>] virtio_queue_rq+0x217/0x220
[ 729.053181] RSP: 0018:ffff880103265d58 EFLAGS: 00010202
[ 729.053181] RAX: 0000000000000081 RBX: ffff880116164900 RCX: dead000000200200
[ 729.053181] RDX: 0000000000007530 RSI: ffff8800a16c4800 RDI: ffff8800a1693400
[ 729.053181] RBP: ffff880103265d98 R08: ffff8800a16c4800 R09: ffff880103265dc8
[ 729.053181] R10: dffd025bd0493448 R11: 0000000000001000 R12: ffff8800a16c4800
[ 729.053181] R13: ffff880103265dc8 R14: 0000000110000001 R15: ffff8800a1693400
[ 729.053181] FS: 0000000000000000(0000) GS:ffff88011fc00000(0000) knlGS:0000000000000000
[ 729.053181] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[ 729.053181] CR2: 000000000225a000 CR3: 000000008fc00000 CR4: 00000000000006f0
[ 729.053181] Stack:
[ 729.053181] ffff880103265d80 ffffffff810a7295 ffff8800a16c4970 ffff8800a1559680
[ 729.053181] ffff8800a1693400 ffff880103265dc8 ffff8800a16c4800 ffff8800a14e1280
[ 729.053181] ffff880103265e00 ffffffff812e0335 ffff8800a1693408 ffff8800a1559680
[ 729.053181] Call Trace:
[ 729.053181] [<ffffffff810a7295>] ? set_next_entity+0x95/0xb0
[ 729.053181] [<ffffffff812e0335>] __blk_mq_run_hw_queue+0x245/0x410
[ 729.053181] [<ffffffff812e0772>] blk_mq_run_work_fn+0x12/0x20
[ 729.053181] [<ffffffff810893b3>] process_one_work+0x183/0x490
[ 729.053181] [<ffffffff81089b7d>] worker_thread+0x11d/0x5c0
[ 729.053181] [<ffffffff81089a60>] ? rescuer_thread+0x3a0/0x3a0
[ 729.053181] [<ffffffff81090832>] kthread+0xd2/0xf0
[ 729.053181] [<ffffffff81090760>] ? kthread_create_on_node+0x180/0x180
[ 729.053181] [<ffffffff8175e47c>] ret_from_fork+0x7c/0xb0
[ 729.053181] [<ffffffff81090760>] ? kthread_create_on_node+0x180/0x180
[ 729.053181] Code: 00 00 00 00 0f b7 86 f4 00 00 00 c7 86 78 01 00 00 02 00 00 00 48 c7 86 80 01 00 00 00 00 00 00 89 86 7c 01 00 00 e9 6f fe ff ff <0f> 0b 0f 1f 80 00 00 00 00 0f 1f 44 00 00 55 48 89 e5 41 57 41 [ 729.053181] RIP [<ffffffff81425b27>] virtio_queue_rq+0x217/0x220
[ 729.053181] RSP <ffff880103265d58>
[ 729.053181] ------------[ cut here ]------------
Full dmesg and reproduce script attached.
Thanks,
Jet
6 years, 1 month
[perf] BUG: unable to handle kernel NULL pointer dereference at 00000000000000eb
by Jet Chen
Hi Jiri,
FYI, we noticed the below changes on
git://git.kernel.org/pub/scm/linux/kernel/git/jolsa/perf.git perf/fd_master_1
commit 93b6a1f2384ec43677bc555a7d5508710f1068d5 ("perf: Add fd_master interface")
test case: lkp-ws02/hackbench/1600%-process-pipe
8210dbfcf40bb8a 93b6a1f2384ec43677bc555a7
--------------- -------------------------
0 +Inf% 1 ~ 0% TOTAL dmesg.BUG:unable_to_handle_kernel_NULL_pointer_dereference
0 +Inf% 1 ~ 0% TOTAL dmesg.Oops
0 +Inf% 1 ~ 0% TOTAL dmesg.RIP:SYSC_perf_event_open
0 +Inf% 1 ~ 0% TOTAL dmesg.Kernel_panic-not_syncing:Fatal_exception
Legend:
~XX% - stddev percent
[+-]XX% - change percent
[ 165.001824] BUG: unable to handle kernel NULL pointer dereference at 00000000000000eb
[ 165.009126] IP: [<ffffffff811404d3>] SYSC_perf_event_open+0x313/0xc00
[ 165.015062] PGD 3cbb7f067 PUD 3a215e067 PMD 0
[ 165.018631] Oops: 0000 [#1] SMP
[ 165.024064] Modules linked in: dm_mod fuse btrfs raid6_pq xor ses enclosure sg sd_mod crct10dif_generic crct10dif_pclmul sr_mod crc_t10dif ata_generic cdrom crct10dif_common pata_acpi snd_pcm snd_timer snd mptsas ahci soundcore mptscsih pata_jmicron libahci pcspkr serio_raw ipmi_si mptbase libata i2c_i801 i7core_edac parport_pc scsi_transport_sas ipmi_msghandler parport edac_core shpchp acpi_cpufreq
[ 165.058119] CPU: 22 PID: 1110 Comm: perf_3.14 Not tainted 3.15.0-rc5-wl-02776-geec4f9d #1
[ 165.067936] Hardware name: Supermicro X8DTN/X8DTN, BIOS 4.6.3 01/06/2010
[ 165.078069] task: ffff88007fd63b00 ti: ffff8801d96f8000 task.ti: ffff8801d96f8000
[ 165.084172] RIP: 0010:[<ffffffff811404d3>] [<ffffffff811404d3>] SYSC_perf_event_open+0x313/0xc00
[ 165.084172] RSP: 0018:ffff8801d96f9ea0 EFLAGS: 00010246
[ 165.096386] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 165.096386] RDX: 00000000000000a7 RSI: 00000000013d07a0 RDI: ffff8801d96f9f40
[ 165.096386] RBP: ffff8801d96f9f68 R08: 0000000000000000 R09: 0000000000000000
[ 165.122926] R10: 00000000ffffffff R11: 0000000000000202 R12: 0000000000000000
[ 165.129153] R13: 0000000000000002 R14: 00000000013e50e0 R15: 0000000000000000
[ 165.137074] FS: 00007f7a8741b740(0000) GS:ffff88043fd40000(0000) knlGS:0000000000000000
[ 165.137074] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[ 165.137074] CR2: 00000000000000eb CR3: 00000003fa5f4000 CR4: 00000000000007e0
[ 165.157185] Stack:
[ 165.157185] ffff8801d96f9ee8 ffffffff811bc023 0000000000000000 0000000000000000
[ 165.164467] 0000000000000000 ffffffff00000000 ffff8800ffffffff ffff880000000000
[ 165.175111] 0000006000000000 0000000000000000 0000000000000320 00000000000001a7
[ 165.175111] Call Trace:
[ 165.175111] [<ffffffff811bc023>] ? __fput+0x1a3/0x230
[ 165.192139] [<ffffffff81141179>] SyS_perf_event_open+0x9/0x10
[ 165.192139] [<ffffffff81760069>] system_call_fastpath+0x16/0x1b
[ 165.202110] Code: 48 c7 c0 ea ff ff ff eb 85 0f 1f 80 00 00 00 00 c7 85 70 ff ff ff 00 00 00 00 45 31 e4 48 c7 85 48 ff ff ff 00 00 00 00 45 31 ff <41> f6 87 eb 00 00 00 01 0f 84 67 02 00 00 f6 45 a3 01 74 39 48
[ 165.225103] RIP [<ffffffff811404d3>] SYSC_perf_event_open+0x313/0xc00
[ 165.229113] RSP <ffff8801d96f9ea0>
[ 165.229113] CR2: 00000000000000eb
[ 165.242082] ---[ end trace e56e4b305beca08e ]---
[ 165.246822] Kernel panic - not syncing: Fatal exception
Append full dmesg file and kconfig as attachments
Thanks,
Jet
6 years, 1 month
[x86, vdso] cfda7bb9ecb: +14.7% will-it-scale.per_thread_ops
by Jet Chen
Hi Andy,
FYI, we noticed the below changes on
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git x86/vdso
commit cfda7bb9ecbf9d96264bb5bade33a842966d1062 ("x86, vdso: Move syscall and sysenter setup into kernel/cpu/common.c")
test case: nhm4/will-it-scale/sched_yield
3d7ee969bffcc98 cfda7bb9ecbf9d96264bb5bad
--------------- -------------------------
5497021 ~ 0% +14.7% 6303424 ~ 0% TOTAL will-it-scale.per_thread_ops
0.54 ~ 0% +5.6% 0.57 ~ 0% TOTAL will-it-scale.scalability
6209483 ~ 0% +1.6% 6305917 ~ 0% TOTAL will-it-scale.per_process_ops
2455 ~ 5% +16.9% 2870 ~ 5% TOTAL cpuidle.C1-NHM.usage
8829 ~ 7% +15.2% 10169 ~10% TOTAL slabinfo.kmalloc-64.active_objs
24.13 ~12% +48.9% 35.93 ~14% TOTAL time.user_time
393 ~ 0% -3.0% 382 ~ 1% TOTAL time.system_time
Legend:
~XX% - stddev percent
[+-]XX% - change percent
Thanks,
Jet
6 years, 1 month
[tracing] b1169cc69ba: +10060.4% proc-vmstat.numa_pte_updates
by Jet Chen
Hi Steven,
FYI, we noticed the below changes on
git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace.git ftrace/core
commit b1169cc69ba96b124df820904a6d3eb775491d7f ("tracing: Remove mock up poll wait function")
f4874261049e3ab b1169cc69ba96b124df820904
--------------- -------------------------
191 ~15% +10060.4% 19487 ~ 8% lkp-ne04/dd-write/1HDD-ext4-2dd.4k
191 ~15% +10060.4% 19487 ~ 8% TOTAL proc-vmstat.numa_pte_updates
f4874261049e3ab b1169cc69ba96b124df820904
--------------- -------------------------
2419721 ~ 0% +88.0% 4549654 ~ 2% lkp-ws02/dd-write/11HDD-JBOD-cfq-xfs-1dd
2419721 ~ 0% +88.0% 4549654 ~ 2% TOTAL perf-stat.context-switches
f4874261049e3ab b1169cc69ba96b124df820904
--------------- -------------------------
954 ~ 0% +52.7% 1457 ~ 0% lkp-ne04/dd-write/1HDD-ext4-2dd.4k
3932 ~ 0% +89.1% 7438 ~ 2% lkp-ws02/dd-write/11HDD-JBOD-cfq-xfs-1dd
4887 ~ 0% +82.0% 8895 ~ 2% TOTAL vmstat.system.cs
f4874261049e3ab b1169cc69ba96b124df820904
--------------- -------------------------
163477 ~ 0% +60.1% 261769 ~ 0% lkp-ws02/dd-write/11HDD-JBOD-cfq-xfs-1dd
163477 ~ 0% +60.1% 261769 ~ 0% TOTAL perf-stat.cpu-migrations
f4874261049e3ab b1169cc69ba96b124df820904
--------------- -------------------------
28742 ~ 0% +6.4% 30574 ~ 0% lkp-ws02/dd-write/11HDD-JBOD-cfq-xfs-1dd
28742 ~ 0% +6.4% 30574 ~ 0% TOTAL vmstat.system.in
Legend:
~XX% - stddev percent
[+-]XX% - change percent
Thanks,
Jet
6 years, 2 months
[uprobes/x86] 8ad8e9d3fd6: -7.5% aim7.2000.jobs-per-min, -45.7% turbostat.%c1
by Jet Chen
Hi Oleg,
we noticed the below changes on
git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
commit 8ad8e9d3fd64f101eed6652964670672d699e563 ("uprobes/x86: Introduce uprobe_xol_ops and arch_uprobe->ops")
Test case: lkp-snb01/aim7/signal_test
34e7317d6ae8f61 8ad8e9d3fd64f101eed665296
--------------- -------------------------
230689 ~ 0% -7.5% 213485 ~ 0% TOTAL aim7.2000.jobs-per-min
0.51 ~30% -45.7% 0.28 ~10% TOTAL turbostat.%c1
430 ~17% +27.8% 549 ~15% TOTAL vmstat.procs.r
0.83 ~14% +38.1% 1.15 ~12% TOTAL perf-profile.cpu-cycles.copy_pte_range.copy_page_range.copy_process.do_fork.sys_clone
106076 ~ 4% +22.4% 129816 ~ 3% TOTAL softirqs.RCU
12117 ~ 6% -9.9% 10914 ~ 6% TOTAL slabinfo.kmalloc-256.active_objs
32163 ~17% +39.4% 44824 ~12% TOTAL time.voluntary_context_switches
276487 ~ 1% +16.5% 322091 ~ 1% TOTAL time.involuntary_context_switches
83.14 ~ 0% +13.3% 94.21 ~ 0% TOTAL time.user_time
108800 ~ 2% +9.4% 119014 ~ 3% TOTAL time.minor_page_faults
1255 ~ 0% +9.9% 1379 ~ 0% TOTAL time.system_time
6774 ~ 1% +8.8% 7373 ~ 1% TOTAL vmstat.system.cs
52.15 ~ 0% +8.0% 56.34 ~ 0% TOTAL time.elapsed_time
25185 ~ 0% +2.4% 25784 ~ 0% TOTAL vmstat.system.in
79.23 ~ 0% +2.0% 80.80 ~ 0% TOTAL turbostat.%c0
2567 ~ 0% +1.9% 2615 ~ 0% TOTAL time.percent_of_cpu_this_job_got
112 ~ 0% +1.3% 113 ~ 0% TOTAL turbostat.Cor_W
138 ~ 0% +1.0% 139 ~ 0% TOTAL turbostat.Pkg_W
Legend:
~XX% - stddev percent
[+-]XX% - change percent
Thanks,
Jet
6 years, 2 months
[cgroup] a0f9ec1f181: -4.3% will-it-scale.per_thread_ops
by Jet Chen
Hi Tejun,
FYI, we noticed the below changes on
git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup.git review-kill-tree_mutex
commit a0f9ec1f181534694cb5bf40b7b56515b8cabef9 ("cgroup: use cgroup_kn_lock_live() in other cgroup kernfs methods")
Test case : lkp-nex05/will-it-scale/writeseek
2074b6e38668e62 a0f9ec1f181534694cb5bf40b
--------------- -------------------------
1027273 ~ 0% -4.3% 982732 ~ 0% TOTAL will-it-scale.per_thread_ops
136 ~ 3% -43.1% 77 ~43% TOTAL proc-vmstat.nr_dirtied
0.51 ~ 3% +98.0% 1.01 ~ 4% TOTAL perf-profile.cpu-cycles.shmem_write_end.generic_perform_write.__generic_file_aio_write.generic_file_aio_write.do_sync_write
1078 ~ 9% -16.3% 903 ~11% TOTAL numa-meminfo.node0.Unevictable
269 ~ 9% -16.2% 225 ~11% TOTAL numa-vmstat.node0.nr_unevictable
1.64 ~ 1% -14.3% 1.41 ~ 4% TOTAL perf-profile.cpu-cycles.find_lock_entry.shmem_getpage_gfp.shmem_write_begin.generic_perform_write.__generic_file_aio_write
1.62 ~ 2% +14.1% 1.84 ~ 1% TOTAL perf-profile.cpu-cycles.lseek64
Legend:
~XX% - stddev percent
[+-]XX% - change percent
Thanks,
Jet
6 years, 2 months
