* [LKP] [Btrfs] 3a8b36f3780: -62.6% fileio.requests_per_sec
@ 2015-03-18 8:20 Huang Ying
2015-03-18 10:05 ` Filipe Manana
0 siblings, 1 reply; 6+ messages in thread
From: Huang Ying @ 2015-03-18 8:20 UTC (permalink / raw)
To: Filipe Manana; +Cc: Chris Mason, LKML, LKP ML
[-- Attachment #1: Type: text/plain, Size: 31081 bytes --]
FYI, we noticed the below changes on
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
commit 3a8b36f378060d20062a0918e99fae39ff077bf0 ("Btrfs: fix data loss in the fast fsync path")
testbox/testcase/testparams: lkp-sb02/fileio/performance-600s-100%-1HDD-btrfs-64G-1024f-rndwr-sync
f5c0a122800c301e 3a8b36f378060d20062a0918e9
---------------- --------------------------
%stddev %change %stddev
\ | \
45.33 ± 0% -62.6% 16.94 ± 0% fileio.requests_per_sec
138983 ± 0% +15.1% 160000 ± 0% fileio.time.voluntary_context_switches
16035 ± 0% +13.0% 18124 ± 0% fileio.time.involuntary_context_switches
2504328 ± 0% -7.2% 2324488 ± 0% fileio.time.file_system_outputs
1.35 ± 1% +2.8% 1.38 ± 0% turbostat.CorWatt
0.77 ± 6% +34.6% 1.03 ± 3% turbostat.Pkg%pc3
7224199 ± 22% -26.7% 5298697 ± 12% cpuidle.C1-SNB.time
8377756 ± 1% +15.7% 9690687 ± 4% cpuidle.C3-SNB.time
16035 ± 0% +13.0% 18124 ± 0% time.involuntary_context_switches
138983 ± 0% +15.1% 160000 ± 0% time.voluntary_context_switches
45941 ± 0% +11.0% 50983 ± 0% softirqs.BLOCK
35635 ± 2% +13.7% 40524 ± 2% softirqs.RCU
26255 ± 1% +10.5% 29017 ± 0% softirqs.SCHED
50650 ± 2% +11.3% 56371 ± 0% softirqs.TIMER
3448 ± 0% +1.6% 3503 ± 0% vmstat.io.bo
4010 ± 0% +2.7% 4119 ± 0% vmstat.system.cs
294711 ± 1% -17.1% 244365 ± 0% meminfo.Active
275793 ± 2% -18.1% 225971 ± 0% meminfo.Active(file)
53614 ± 6% +27.6% 68412 ± 15% meminfo.DirectMap4k
3781 ± 0% -46.9% 2006 ± 0% meminfo.Dirty
47786 ± 0% -14.7% 40780 ± 0% meminfo.SReclaimable
66047 ± 0% -10.7% 58973 ± 0% meminfo.Slab
68947 ± 2% -18.1% 56492 ± 0% proc-vmstat.nr_active_file
337110 ± 0% -10.0% 303330 ± 0% proc-vmstat.nr_dirtied
944 ± 0% -46.9% 501 ± 0% proc-vmstat.nr_dirty
11946 ± 0% -14.7% 10195 ± 0% proc-vmstat.nr_slab_reclaimable
335424 ± 0% -9.7% 302754 ± 0% proc-vmstat.nr_written
55839 ± 3% -15.0% 47438 ± 0% proc-vmstat.pgactivate
1142 ± 5% -16.2% 957 ± 17% slabinfo.btrfs_delayed_ref_head.active_objs
1146 ± 5% -16.0% 962 ± 17% slabinfo.btrfs_delayed_ref_head.num_objs
1246 ± 6% -29.4% 880 ± 15% slabinfo.btrfs_delayed_tree_ref.active_objs
1246 ± 6% -29.4% 880 ± 15% slabinfo.btrfs_delayed_tree_ref.num_objs
2037 ± 2% +60.0% 3260 ± 1% slabinfo.btrfs_extent_buffer.num_objs
2023 ± 2% +60.7% 3250 ± 1% slabinfo.btrfs_extent_buffer.active_objs
13307 ± 0% -57.7% 5634 ± 0% slabinfo.btrfs_extent_state.num_objs
260 ± 0% -57.8% 110 ± 0% slabinfo.btrfs_extent_state.num_slabs
13292 ± 0% -57.6% 5634 ± 0% slabinfo.btrfs_extent_state.active_objs
260 ± 0% -57.8% 110 ± 0% slabinfo.btrfs_extent_state.active_slabs
713 ± 1% -51.2% 348 ± 1% slabinfo.btrfs_ordered_extent.active_objs
718 ± 1% -48.1% 373 ± 1% slabinfo.btrfs_ordered_extent.num_objs
26930 ± 0% -57.1% 11557 ± 0% slabinfo.btrfs_path.num_objs
961 ± 0% -57.1% 412 ± 0% slabinfo.btrfs_path.active_slabs
961 ± 0% -57.1% 412 ± 0% slabinfo.btrfs_path.num_slabs
26930 ± 0% -57.1% 11557 ± 0% slabinfo.btrfs_path.active_objs
789 ± 4% -48.5% 406 ± 0% slabinfo.ext4_extent_status.num_objs
789 ± 4% -48.5% 406 ± 0% slabinfo.ext4_extent_status.active_objs
26083 ± 0% -28.3% 18697 ± 0% slabinfo.radix_tree_node.num_objs
26083 ± 0% -28.3% 18697 ± 0% slabinfo.radix_tree_node.active_objs
931 ± 0% -28.3% 667 ± 0% slabinfo.radix_tree_node.active_slabs
931 ± 0% -28.3% 667 ± 0% slabinfo.radix_tree_node.num_slabs
4 ± 38% +129.4% 9 ± 31% sched_debug.cfs_rq[0]:/.runnable_load_avg
17 ± 32% -54.9% 8 ± 45% sched_debug.cfs_rq[3]:/.runnable_load_avg
385 ± 14% -25.3% 287 ± 17% sched_debug.cfs_rq[3]:/.load
51947 ± 3% +15.4% 59938 ± 3% sched_debug.cpu#0.nr_load_updates
200860 ± 5% +11.6% 224079 ± 4% sched_debug.cpu#1.ttwu_local
47218 ± 2% +7.4% 50701 ± 2% sched_debug.cpu#1.nr_load_updates
5 ± 37% +105.0% 10 ± 26% sched_debug.cpu#1.cpu_load[1]
226755 ± 4% +11.4% 252611 ± 4% sched_debug.cpu#1.ttwu_count
2500 ± 34% -45.6% 1360 ± 33% sched_debug.cpu#3.curr->pid
385 ± 14% -25.8% 285 ± 16% sched_debug.cpu#3.load
testbox/testcase/testparams: bay/fileio/performance-600s-100%-1HDD-btrfs-64G-1024f-rndrw-sync
f5c0a122800c301e 3a8b36f378060d20062a0918e9
---------------- --------------------------
62.17 ± 0% -64.6% 22.03 ± 0% fileio.requests_per_sec
712336 ± 0% -64.2% 255005 ± 0% fileio.time.file_system_inputs
712336 ± 0% -64.2% 255005 ± 0% time.file_system_inputs
0.73 ± 3% -21.1% 0.58 ± 3% time.user_time
46562 ± 0% +29.5% 60303 ± 1% softirqs.RCU
57662 ± 0% +16.7% 67299 ± 0% softirqs.SCHED
259 ± 0% -64.3% 92 ± 0% vmstat.io.bi
3638 ± 1% -10.1% 3272 ± 2% meminfo.Dirty
432 ± 8% -25.8% 320 ± 28% proc-vmstat.allocstall
253 ± 9% -21.9% 197 ± 19% proc-vmstat.compact_fail
506 ± 8% -17.8% 416 ± 14% proc-vmstat.compact_stall
11262 ± 3% -20.1% 8996 ± 2% proc-vmstat.kswapd_low_wmark_hit_quickly
910 ± 1% -10.5% 815 ± 0% proc-vmstat.nr_dirty
17652 ± 2% -16.0% 14833 ± 3% proc-vmstat.pageoutrun
59446 ± 0% -20.2% 47455 ± 0% proc-vmstat.pgactivate
169701 ± 0% +11.5% 189186 ± 5% proc-vmstat.pgmigrate_success
355946 ± 0% -64.2% 127593 ± 0% proc-vmstat.pgpgin
27402 ± 7% -23.9% 20844 ± 29% proc-vmstat.pgsteal_direct_dma32
4868 ± 0% -56.8% 2104 ± 1% proc-vmstat.workingset_refault
1624 ± 3% -5.7% 1530 ± 1% slabinfo.Acpi-ParseExt.active_objs
1624 ± 3% -5.7% 1530 ± 1% slabinfo.Acpi-ParseExt.num_objs
1009 ± 6% -28.6% 720 ± 17% slabinfo.btrfs_delayed_data_ref.active_objs
1016 ± 6% -28.5% 726 ± 16% slabinfo.btrfs_delayed_data_ref.num_objs
849 ± 0% -10.3% 761 ± 4% slabinfo.btrfs_delayed_ref_head.active_objs
851 ± 0% -9.9% 767 ± 4% slabinfo.btrfs_delayed_ref_head.num_objs
10883 ± 1% -47.5% 5709 ± 4% slabinfo.btrfs_extent_state.num_objs
213 ± 1% -47.6% 111 ± 4% slabinfo.btrfs_extent_state.num_slabs
10794 ± 1% -48.6% 5551 ± 3% slabinfo.btrfs_extent_state.active_objs
213 ± 1% -47.6% 111 ± 4% slabinfo.btrfs_extent_state.active_slabs
6596 ± 0% -58.5% 2735 ± 1% slabinfo.btrfs_path.num_objs
235 ± 0% -58.6% 97 ± 1% slabinfo.btrfs_path.active_slabs
235 ± 0% -58.6% 97 ± 1% slabinfo.btrfs_path.num_slabs
6592 ± 0% -58.6% 2731 ± 1% slabinfo.btrfs_path.active_objs
5055 ± 6% -9.0% 4601 ± 2% slabinfo.kmalloc-32.num_objs
5055 ± 6% -9.0% 4601 ± 2% slabinfo.kmalloc-32.active_objs
1512 ± 2% -12.2% 1328 ± 5% slabinfo.kmalloc-96.num_objs
1512 ± 2% -12.2% 1328 ± 5% slabinfo.kmalloc-96.active_objs
459 ± 2% -16.8% 382 ± 6% sched_debug.cfs_rq[0]:/.blocked_load_avg
478 ± 1% -15.6% 403 ± 5% sched_debug.cfs_rq[0]:/.tg_load_contrib
49 ± 7% -9.1% 45 ± 11% sched_debug.cfs_rq[3]:/.tg_runnable_contrib
2337 ± 6% -9.9% 2106 ± 11% sched_debug.cfs_rq[3]:/.avg->runnable_avg_sum
25079 ± 3% -10.1% 22542 ± 4% sched_debug.cfs_rq[3]:/.exec_clock
28 ± 17% -35.7% 18 ± 9% sched_debug.cfs_rq[3]:/.nr_spread_over
499222 ± 12% -59.7% 201330 ± 40% sched_debug.cpu#0.sched_goidle
1018389 ± 12% -58.2% 425747 ± 37% sched_debug.cpu#0.nr_switches
90529 ± 4% -17.6% 74603 ± 8% sched_debug.cpu#0.nr_load_updates
513982 ± 13% -56.9% 221386 ± 36% sched_debug.cpu#0.ttwu_count
1019018 ± 12% -58.2% 426387 ± 37% sched_debug.cpu#0.sched_count
320 ± 3% -14.3% 274 ± 13% sched_debug.cpu#0.load
323974 ± 21% +131.6% 750473 ± 12% sched_debug.cpu#1.sched_count
323373 ± 21% +131.9% 749837 ± 12% sched_debug.cpu#1.nr_switches
89555 ± 46% +230.0% 295518 ± 16% sched_debug.cpu#1.ttwu_local
13 ± 30% +59.0% 20 ± 8% sched_debug.cpu#1.cpu_load[2]
8 ± 41% +111.8% 18 ± 12% sched_debug.cpu#1.cpu_load[4]
68535 ± 4% +22.2% 83732 ± 1% sched_debug.cpu#1.nr_load_updates
10 ± 33% +84.1% 19 ± 9% sched_debug.cpu#1.cpu_load[3]
160382 ± 16% +122.7% 357238 ± 12% sched_debug.cpu#1.ttwu_count
151508 ± 22% +140.8% 364820 ± 12% sched_debug.cpu#1.sched_goidle
388481 ± 2% -42.8% 222376 ± 46% sched_debug.cpu#2.ttwu_local
87970 ± 3% -6.8% 81971 ± 6% sched_debug.cpu#2.nr_load_updates
452753 ± 3% -37.3% 283785 ± 36% sched_debug.cpu#2.ttwu_count
916511 ± 5% -36.7% 580526 ± 36% sched_debug.cpu#2.nr_switches
917118 ± 5% -36.6% 581168 ± 36% sched_debug.cpu#2.sched_count
448592 ± 5% -37.9% 278755 ± 38% sched_debug.cpu#2.sched_goidle
140376 ± 7% +179.3% 392097 ± 28% sched_debug.cpu#3.sched_goidle
68344 ± 2% +24.1% 84790 ± 8% sched_debug.cpu#3.nr_load_updates
78592 ± 33% +335.3% 342125 ± 33% sched_debug.cpu#3.ttwu_local
300663 ± 7% +168.1% 806077 ± 27% sched_debug.cpu#3.sched_count
149690 ± 12% +182.2% 422447 ± 26% sched_debug.cpu#3.ttwu_count
300054 ± 7% +168.5% 805498 ± 27% sched_debug.cpu#3.nr_switches
testbox/testcase/testparams: bay/fileio/performance-600s-100%-1HDD-btrfs-64G-1024f-rndwr-sync
f5c0a122800c301e 3a8b36f378060d20062a0918e9
---------------- --------------------------
1.32 ± 6% +8834.3% 117.71 ±171% fileio.request_latency_max_ms
44.70 ± 0% -56.7% 19.35 ± 0% fileio.requests_per_sec
156010 ± 0% +38.4% 215846 ± 0% fileio.time.voluntary_context_switches
2663864 ± 0% -6.2% 2499112 ± 0% fileio.time.file_system_outputs
156010 ± 0% +38.4% 215846 ± 0% time.voluntary_context_switches
39761 ± 1% +22.5% 48712 ± 2% softirqs.RCU
37048 ± 1% +17.1% 43380 ± 2% softirqs.SCHED
52147 ± 1% +15.3% 60140 ± 1% softirqs.TIMER
2142 ± 0% +4.6% 2239 ± 0% vmstat.system.in
4067 ± 0% +5.9% 4307 ± 0% vmstat.system.cs
315172 ± 0% -13.9% 271267 ± 0% meminfo.Active
296097 ± 0% -14.5% 253063 ± 0% meminfo.Active(file)
3678 ± 0% -42.1% 2131 ± 1% meminfo.Dirty
47204 ± 0% -14.5% 40351 ± 0% meminfo.SReclaimable
64571 ± 0% -10.7% 57634 ± 0% meminfo.Slab
74024 ± 0% -14.5% 63263 ± 0% proc-vmstat.nr_active_file
919 ± 0% -42.1% 532 ± 1% proc-vmstat.nr_dirty
11801 ± 0% -14.5% 10087 ± 0% proc-vmstat.nr_slab_reclaimable
59906 ± 0% -25.1% 44895 ± 0% proc-vmstat.pgactivate
1971 ± 5% -8.0% 1814 ± 3% slabinfo.anon_vma.active_objs
1971 ± 5% -8.0% 1814 ± 3% slabinfo.anon_vma.num_objs
1759 ± 7% -17.1% 1457 ± 5% slabinfo.btrfs_delayed_data_ref.active_objs
1768 ± 7% -17.2% 1464 ± 5% slabinfo.btrfs_delayed_data_ref.num_objs
1081 ± 15% -41.9% 628 ± 11% slabinfo.btrfs_delayed_tree_ref.active_objs
1082 ± 15% -41.9% 628 ± 11% slabinfo.btrfs_delayed_tree_ref.num_objs
2313 ± 1% -21.9% 1805 ± 0% slabinfo.btrfs_extent_buffer.num_objs
2301 ± 1% -22.1% 1792 ± 0% slabinfo.btrfs_extent_buffer.active_objs
13162 ± 0% -51.8% 6341 ± 0% slabinfo.btrfs_extent_state.num_objs
257 ± 0% -51.9% 123 ± 0% slabinfo.btrfs_extent_state.num_slabs
13152 ± 0% -51.8% 6341 ± 0% slabinfo.btrfs_extent_state.active_objs
257 ± 0% -51.9% 123 ± 0% slabinfo.btrfs_extent_state.active_slabs
715 ± 0% -46.2% 385 ± 5% slabinfo.btrfs_ordered_extent.active_objs
720 ± 0% -43.4% 408 ± 5% slabinfo.btrfs_ordered_extent.num_objs
26591 ± 0% -51.4% 12924 ± 0% slabinfo.btrfs_path.num_objs
949 ± 0% -51.4% 461 ± 0% slabinfo.btrfs_path.active_slabs
949 ± 0% -51.4% 461 ± 0% slabinfo.btrfs_path.num_slabs
26591 ± 0% -51.4% 12924 ± 0% slabinfo.btrfs_path.active_objs
670 ± 8% -39.2% 407 ± 0% slabinfo.ext4_extent_status.num_objs
670 ± 8% -39.2% 407 ± 0% slabinfo.ext4_extent_status.active_objs
503 ± 6% -13.2% 437 ± 8% slabinfo.mnt_cache.active_objs
522 ± 7% -13.4% 452 ± 6% slabinfo.mnt_cache.num_objs
26243 ± 0% -26.8% 19212 ± 0% slabinfo.radix_tree_node.num_objs
26243 ± 0% -26.8% 19212 ± 0% slabinfo.radix_tree_node.active_objs
937 ± 0% -26.8% 685 ± 0% slabinfo.radix_tree_node.active_slabs
937 ± 0% -26.8% 685 ± 0% slabinfo.radix_tree_node.num_slabs
lkp-sb02: Sandy Bridge-EP
Memory: 4G
bay: Pentium D
Memory: 2G
fileio.requests_per_sec
50 ++---------------------------------------------------------------------+
| |
45 *+.*..*...*..*..*..*...*..*..*..*...*..*..*..*..*...*..*..*..*...*..*..*
40 ++ |
| |
35 ++ |
| |
30 ++ |
| |
25 ++ |
20 ++ |
O O O O O |
15 ++ O O O O O O O O O O O O O |
| |
10 ++--------------O------------------------------------------------------+
fileio.time.file_system_outputs
2.6e+06 ++----------------------------------------------------------------+
2.5e+06 *+.*..*..*..*..*..*..*..*..*..*..*..*..*..*..*..*..*..*..*..*..*..*
| |
2.4e+06 O+ O O O O O O O O O |
2.3e+06 ++ O O O O O O O O |
2.2e+06 ++ |
2.1e+06 ++ |
| |
2e+06 ++ |
1.9e+06 ++ |
1.8e+06 ++ |
1.7e+06 ++ |
| |
1.6e+06 ++ O |
1.5e+06 ++----------------------------------------------------------------+
proc-vmstat.nr_active_file
75000 ++------------------------------------------------------------------+
| |
70000 ++ .*..|
*..*..*..*..*..*...*..*..*..*..*..*..*.. .*.. .*...*..*..*..*. *
| *. *. |
65000 ++ |
| |
60000 ++ |
| O O |
55000 O+ O O O O O O O O O O O O O O O |
| |
| |
50000 ++ O |
| |
45000 ++------------------------------------------------------------------+
proc-vmstat.nr_dirty
1000 ++-------------------------------------------------------------------+
*..*..*..*...*..*..*..*..*..*..*... .*.. .*.. .*..*..*...*..*..*..*
900 ++ *. *. *. |
| |
800 ++ |
| |
700 ++ |
| |
600 ++ |
| |
500 O+ O O O O O O O O O O O O O O O O O |
| |
400 ++ O |
| |
300 ++-------------------------------------------------------------------+
proc-vmstat.nr_slab_reclaimable
12000 ++--------------------------*--*-----*-----*-----*---*-----*--*-----*
| .. *. .. .. *. *. |
*..*..*..*..*..*...*..*..* * * |
11500 ++ |
| |
| |
11000 ++ |
| |
10500 ++ |
| |
| O O O O O O O O |
10000 ++ O O |
O O O O O O O O |
| |
9500 ++-------------O----------------------------------------------------+
proc-vmstat.nr_dirtied
340000 *+-*--*--*--*--*--*--*--*--*--*---*--*--*--*--*--*--*--*--*--*--*--*
| |
320000 ++ |
| O |
300000 O+ O O O O O O O O O O O O O O O O |
| |
280000 ++ |
| |
260000 ++ |
| |
240000 ++ |
| |
220000 ++ |
| |
200000 ++-------------O---------------------------------------------------+
proc-vmstat.nr_written
340000 ++-*-----*--------*------------------*--*--*--*-----*--*--*--*-----*
*. *. *..*. *..*..*..*...*. *. *. |
320000 ++ |
| |
300000 O+ O O O O O O O O O O O O O O O O O |
| |
280000 ++ |
| |
260000 ++ |
| |
240000 ++ |
| |
220000 ++ |
| |
200000 ++-------------O---------------------------------------------------+
proc-vmstat.pgactivate
60000 ++---------------------------------------------------------------*--+
| .. |
55000 *+.*..*..*..*..*...*..*..*..*..*..*..*..*..*..*..*...*..*..*..* *
| |
50000 ++ |
O O O O O O O O O O O O O O O O O |
45000 ++ O |
| |
40000 ++ |
| |
35000 ++ |
| |
30000 ++ O |
| |
25000 ++------------------------------------------------------------------+
meminfo.Active
310000 ++-----------------------------------------------------------------+
300000 ++ *..|
| .*..*..*..*.. .*... .*.. *.. .. *
290000 *+ *..*..*..*..*. *. .*.. .. *..*..*..* |
280000 ++ *. * |
| |
270000 ++ |
260000 ++ |
250000 ++ |
O O O O O O O O O O O O O O O O O |
240000 ++ O |
230000 ++ |
| |
220000 ++ O |
210000 ++-----------------------------------------------------------------+
meminfo.Active(file)
290000 ++-----------------------------------------------------------------+
280000 ++ *..|
| .*..*..*..*..*..*..*..*..*..*... .*.. *..*.. .. *
270000 *+ *. *..*.. .. *..*..* |
260000 ++ * |
| |
250000 ++ |
240000 ++ |
230000 ++ |
O O O O O O O O O O O O O O O O O |
220000 ++ O |
210000 ++ |
| |
200000 ++ O |
190000 ++-----------------------------------------------------------------+
meminfo.Dirty
4000 ++-------------------------------------------------------------------+
*..*..*..*...*..*..*..*..*..*..*... .*.. .*..*..*...*..*..*..*
| *. *..*..*. |
3500 ++ |
| |
| |
3000 ++ |
| |
2500 ++ |
| |
| |
2000 O+ O O O O O O O O O O O O O O O O O |
| |
| |
1500 ++--------------O----------------------------------------------------+
meminfo.Slab
67000 ++------------------------------------------------------------------+
66000 ++ *..*.. .*.. *.. ..*.. .*.. .*..*
| .. *. .. .*. *. *. |
65000 *+.*..*..*..*..*...*..*..* * *. |
64000 ++ |
63000 ++ |
62000 ++ |
| |
61000 ++ |
60000 ++ |
59000 ++ O O O O O O O O O |
58000 ++ O O O O |
O O O O O |
57000 ++ O |
56000 ++------------------------------------------------------------------+
meminfo.SReclaimable
48000 ++--------------------------*--*-----*-----*-----*---*-----*--*-----*
47000 ++ .. *. .. .. *. *. |
*..*..*..*..*..*...*..*..* * * |
46000 ++ |
45000 ++ |
| |
44000 ++ |
43000 ++ |
42000 ++ |
| |
41000 ++ O O O O O O O O |
40000 ++ O O |
O O O O O O O O |
39000 ++ |
38000 ++-------------O----------------------------------------------------+
[*] bisect-good sample
[O] bisect-bad sample
To reproduce:
apt-get install ruby
git clone git://git.kernel.org/pub/scm/linux/kernel/git/wfg/lkp-tests.git
cd lkp-tests
bin/setup-local job.yaml # the job file attached in this email
bin/run-local job.yaml
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,
Ying Huang
[-- Attachment #2: job.yaml --]
[-- Type: text/plain, Size: 1831 bytes --]
---
testcase: fileio
default-monitors:
wait: pre-test
uptime:
iostat:
vmstat:
numa-numastat:
numa-vmstat:
numa-meminfo:
proc-vmstat:
proc-stat:
meminfo:
slabinfo:
interrupts:
lock_stat:
latency_stats:
softirqs:
bdi_dev_mapping:
diskstats:
nfsstat:
cpuidle:
cpufreq-stats:
turbostat:
pmeter:
sched_debug:
interval: 10
default_watchdogs:
watch-oom:
watchdog:
cpufreq_governor: performance
commit: 9eccca0843205f87c00404b663188b88eb248051
model: Sandy Bridge-EP
memory: 4G
hdd_partitions: "/dev/disk/by-id/ata-HDT722516DLA380_VDSD1DTCEKYAEJ-part2"
swap_partitions:
rootfs_partition: "/dev/disk/by-id/ata-HDT722516DLA380_VDSD1DTCEKYAEJ-part1"
period: 600s
nr_threads: 100%
disk: 1HDD
fs: btrfs
size: 64G
fileio:
filenum: 1024f
rwmode: rndwr
iomode: sync
testbox: lkp-sb02
tbox_group: lkp-sb02
kconfig: x86_64-rhel
enqueue_time: 2015-03-09 18:58:56.664224511 +08:00
head_commit: 22b0731038c7bed19161c232134e457bfd0ab7c7
base_commit: 9eccca0843205f87c00404b663188b88eb248051
branch: linux-devel/devel-hourly-2015031206
kernel: "/kernel/x86_64-rhel/9eccca0843205f87c00404b663188b88eb248051/vmlinuz-4.0.0-rc3"
user: wfg
queue: cyclic
rootfs: debian-x86_64-2015-02-07.cgz
result_root: "/result/lkp-sb02/fileio/performance-600s-100%-1HDD-btrfs-64G-1024f-rndwr-sync/debian-x86_64-2015-02-07.cgz/x86_64-rhel/9eccca0843205f87c00404b663188b88eb248051/0"
job_file: "/lkp/scheduled/lkp-sb02/cyclic_fileio-performance-600s-100%-1HDD-btrfs-64G-1024f-rndwr-sync-x86_64-rhel-BASE-9eccca0843205f87c00404b663188b88eb248051-0-20150309-106430-ne86sn.yaml"
dequeue_time: 2015-03-12 13:29:16.651686503 +08:00
nr_cpu: "$(nproc)"
job_state: finished
loadavg: 3.14 3.34 1.92 1/132 12642
start_time: '1426138196'
end_time: '1426138827'
version: "/lkp/wfg/.src-20150312-111505"
[-- Attachment #3: reproduce --]
[-- Type: text/plain, Size: 37304 bytes --]
echo performance > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
echo performance > /sys/devices/system/cpu/cpu1/cpufreq/scaling_governor
echo performance > /sys/devices/system/cpu/cpu2/cpufreq/scaling_governor
echo performance > /sys/devices/system/cpu/cpu3/cpufreq/scaling_governor
mkfs -t btrfs /dev/sda2
mount -t btrfs /dev/sda2 /fs/sda2
cd /fs/sda2
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sysbench --test=fileio --max-requests=0 --num-threads=4 --max-time=600 --file-test-mode=rndwr --file-total-size=68719476736 --file-io-mode=sync --file-num=1024 run
[-- Attachment #4: Type: text/plain, Size: 89 bytes --]
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* Re: [LKP] [Btrfs] 3a8b36f3780: -62.6% fileio.requests_per_sec
2015-03-18 8:20 [LKP] [Btrfs] 3a8b36f3780: -62.6% fileio.requests_per_sec Huang Ying
@ 2015-03-18 10:05 ` Filipe Manana
2015-03-31 8:32 ` Huang Ying
0 siblings, 1 reply; 6+ messages in thread
From: Filipe Manana @ 2015-03-18 10:05 UTC (permalink / raw)
To: Huang Ying; +Cc: Chris Mason, LKML, LKP ML
On 03/18/2015 08:20 AM, Huang Ying wrote:
> FYI, we noticed the below changes on
>
> git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> commit 3a8b36f378060d20062a0918e99fae39ff077bf0 ("Btrfs: fix data loss in the fast fsync path")
>
>
> testbox/testcase/testparams: lkp-sb02/fileio/performance-600s-100%-1HDD-btrfs-64G-1024f-rndwr-sync
>
> f5c0a122800c301e 3a8b36f378060d20062a0918e9
> ---------------- --------------------------
> %stddev %change %stddev
> \ | \
> 45.33 ± 0% -62.6% 16.94 ± 0% fileio.requests_per_sec
> 138983 ± 0% +15.1% 160000 ± 0% fileio.time.voluntary_context_switches
> 16035 ± 0% +13.0% 18124 ± 0% fileio.time.involuntary_context_switches
> 2504328 ± 0% -7.2% 2324488 ± 0% fileio.time.file_system_outputs
> 1.35 ± 1% +2.8% 1.38 ± 0% turbostat.CorWatt
> 0.77 ± 6% +34.6% 1.03 ± 3% turbostat.Pkg%pc3
> 7224199 ± 22% -26.7% 5298697 ± 12% cpuidle.C1-SNB.time
> 8377756 ± 1% +15.7% 9690687 ± 4% cpuidle.C3-SNB.time
> 16035 ± 0% +13.0% 18124 ± 0% time.involuntary_context_switches
> 138983 ± 0% +15.1% 160000 ± 0% time.voluntary_context_switches
> 45941 ± 0% +11.0% 50983 ± 0% softirqs.BLOCK
> 35635 ± 2% +13.7% 40524 ± 2% softirqs.RCU
> 26255 ± 1% +10.5% 29017 ± 0% softirqs.SCHED
> 50650 ± 2% +11.3% 56371 ± 0% softirqs.TIMER
> 3448 ± 0% +1.6% 3503 ± 0% vmstat.io.bo
> 4010 ± 0% +2.7% 4119 ± 0% vmstat.system.cs
> 294711 ± 1% -17.1% 244365 ± 0% meminfo.Active
> 275793 ± 2% -18.1% 225971 ± 0% meminfo.Active(file)
> 53614 ± 6% +27.6% 68412 ± 15% meminfo.DirectMap4k
> 3781 ± 0% -46.9% 2006 ± 0% meminfo.Dirty
> 47786 ± 0% -14.7% 40780 ± 0% meminfo.SReclaimable
> 66047 ± 0% -10.7% 58973 ± 0% meminfo.Slab
> 68947 ± 2% -18.1% 56492 ± 0% proc-vmstat.nr_active_file
> 337110 ± 0% -10.0% 303330 ± 0% proc-vmstat.nr_dirtied
> 944 ± 0% -46.9% 501 ± 0% proc-vmstat.nr_dirty
> 11946 ± 0% -14.7% 10195 ± 0% proc-vmstat.nr_slab_reclaimable
> 335424 ± 0% -9.7% 302754 ± 0% proc-vmstat.nr_written
> 55839 ± 3% -15.0% 47438 ± 0% proc-vmstat.pgactivate
> 1142 ± 5% -16.2% 957 ± 17% slabinfo.btrfs_delayed_ref_head.active_objs
> 1146 ± 5% -16.0% 962 ± 17% slabinfo.btrfs_delayed_ref_head.num_objs
> 1246 ± 6% -29.4% 880 ± 15% slabinfo.btrfs_delayed_tree_ref.active_objs
> 1246 ± 6% -29.4% 880 ± 15% slabinfo.btrfs_delayed_tree_ref.num_objs
> 2037 ± 2% +60.0% 3260 ± 1% slabinfo.btrfs_extent_buffer.num_objs
> 2023 ± 2% +60.7% 3250 ± 1% slabinfo.btrfs_extent_buffer.active_objs
> 13307 ± 0% -57.7% 5634 ± 0% slabinfo.btrfs_extent_state.num_objs
> 260 ± 0% -57.8% 110 ± 0% slabinfo.btrfs_extent_state.num_slabs
> 13292 ± 0% -57.6% 5634 ± 0% slabinfo.btrfs_extent_state.active_objs
> 260 ± 0% -57.8% 110 ± 0% slabinfo.btrfs_extent_state.active_slabs
> 713 ± 1% -51.2% 348 ± 1% slabinfo.btrfs_ordered_extent.active_objs
> 718 ± 1% -48.1% 373 ± 1% slabinfo.btrfs_ordered_extent.num_objs
> 26930 ± 0% -57.1% 11557 ± 0% slabinfo.btrfs_path.num_objs
> 961 ± 0% -57.1% 412 ± 0% slabinfo.btrfs_path.active_slabs
> 961 ± 0% -57.1% 412 ± 0% slabinfo.btrfs_path.num_slabs
> 26930 ± 0% -57.1% 11557 ± 0% slabinfo.btrfs_path.active_objs
> 789 ± 4% -48.5% 406 ± 0% slabinfo.ext4_extent_status.num_objs
> 789 ± 4% -48.5% 406 ± 0% slabinfo.ext4_extent_status.active_objs
> 26083 ± 0% -28.3% 18697 ± 0% slabinfo.radix_tree_node.num_objs
> 26083 ± 0% -28.3% 18697 ± 0% slabinfo.radix_tree_node.active_objs
> 931 ± 0% -28.3% 667 ± 0% slabinfo.radix_tree_node.active_slabs
> 931 ± 0% -28.3% 667 ± 0% slabinfo.radix_tree_node.num_slabs
> 4 ± 38% +129.4% 9 ± 31% sched_debug.cfs_rq[0]:/.runnable_load_avg
> 17 ± 32% -54.9% 8 ± 45% sched_debug.cfs_rq[3]:/.runnable_load_avg
> 385 ± 14% -25.3% 287 ± 17% sched_debug.cfs_rq[3]:/.load
> 51947 ± 3% +15.4% 59938 ± 3% sched_debug.cpu#0.nr_load_updates
> 200860 ± 5% +11.6% 224079 ± 4% sched_debug.cpu#1.ttwu_local
> 47218 ± 2% +7.4% 50701 ± 2% sched_debug.cpu#1.nr_load_updates
> 5 ± 37% +105.0% 10 ± 26% sched_debug.cpu#1.cpu_load[1]
> 226755 ± 4% +11.4% 252611 ± 4% sched_debug.cpu#1.ttwu_count
> 2500 ± 34% -45.6% 1360 ± 33% sched_debug.cpu#3.curr->pid
> 385 ± 14% -25.8% 285 ± 16% sched_debug.cpu#3.load
>
> testbox/testcase/testparams: bay/fileio/performance-600s-100%-1HDD-btrfs-64G-1024f-rndrw-sync
>
> f5c0a122800c301e 3a8b36f378060d20062a0918e9
> ---------------- --------------------------
> 62.17 ± 0% -64.6% 22.03 ± 0% fileio.requests_per_sec
> 712336 ± 0% -64.2% 255005 ± 0% fileio.time.file_system_inputs
> 712336 ± 0% -64.2% 255005 ± 0% time.file_system_inputs
> 0.73 ± 3% -21.1% 0.58 ± 3% time.user_time
> 46562 ± 0% +29.5% 60303 ± 1% softirqs.RCU
> 57662 ± 0% +16.7% 67299 ± 0% softirqs.SCHED
> 259 ± 0% -64.3% 92 ± 0% vmstat.io.bi
> 3638 ± 1% -10.1% 3272 ± 2% meminfo.Dirty
> 432 ± 8% -25.8% 320 ± 28% proc-vmstat.allocstall
> 253 ± 9% -21.9% 197 ± 19% proc-vmstat.compact_fail
> 506 ± 8% -17.8% 416 ± 14% proc-vmstat.compact_stall
> 11262 ± 3% -20.1% 8996 ± 2% proc-vmstat.kswapd_low_wmark_hit_quickly
> 910 ± 1% -10.5% 815 ± 0% proc-vmstat.nr_dirty
> 17652 ± 2% -16.0% 14833 ± 3% proc-vmstat.pageoutrun
> 59446 ± 0% -20.2% 47455 ± 0% proc-vmstat.pgactivate
> 169701 ± 0% +11.5% 189186 ± 5% proc-vmstat.pgmigrate_success
> 355946 ± 0% -64.2% 127593 ± 0% proc-vmstat.pgpgin
> 27402 ± 7% -23.9% 20844 ± 29% proc-vmstat.pgsteal_direct_dma32
> 4868 ± 0% -56.8% 2104 ± 1% proc-vmstat.workingset_refault
> 1624 ± 3% -5.7% 1530 ± 1% slabinfo.Acpi-ParseExt.active_objs
> 1624 ± 3% -5.7% 1530 ± 1% slabinfo.Acpi-ParseExt.num_objs
> 1009 ± 6% -28.6% 720 ± 17% slabinfo.btrfs_delayed_data_ref.active_objs
> 1016 ± 6% -28.5% 726 ± 16% slabinfo.btrfs_delayed_data_ref.num_objs
> 849 ± 0% -10.3% 761 ± 4% slabinfo.btrfs_delayed_ref_head.active_objs
> 851 ± 0% -9.9% 767 ± 4% slabinfo.btrfs_delayed_ref_head.num_objs
> 10883 ± 1% -47.5% 5709 ± 4% slabinfo.btrfs_extent_state.num_objs
> 213 ± 1% -47.6% 111 ± 4% slabinfo.btrfs_extent_state.num_slabs
> 10794 ± 1% -48.6% 5551 ± 3% slabinfo.btrfs_extent_state.active_objs
> 213 ± 1% -47.6% 111 ± 4% slabinfo.btrfs_extent_state.active_slabs
> 6596 ± 0% -58.5% 2735 ± 1% slabinfo.btrfs_path.num_objs
> 235 ± 0% -58.6% 97 ± 1% slabinfo.btrfs_path.active_slabs
> 235 ± 0% -58.6% 97 ± 1% slabinfo.btrfs_path.num_slabs
> 6592 ± 0% -58.6% 2731 ± 1% slabinfo.btrfs_path.active_objs
> 5055 ± 6% -9.0% 4601 ± 2% slabinfo.kmalloc-32.num_objs
> 5055 ± 6% -9.0% 4601 ± 2% slabinfo.kmalloc-32.active_objs
> 1512 ± 2% -12.2% 1328 ± 5% slabinfo.kmalloc-96.num_objs
> 1512 ± 2% -12.2% 1328 ± 5% slabinfo.kmalloc-96.active_objs
> 459 ± 2% -16.8% 382 ± 6% sched_debug.cfs_rq[0]:/.blocked_load_avg
> 478 ± 1% -15.6% 403 ± 5% sched_debug.cfs_rq[0]:/.tg_load_contrib
> 49 ± 7% -9.1% 45 ± 11% sched_debug.cfs_rq[3]:/.tg_runnable_contrib
> 2337 ± 6% -9.9% 2106 ± 11% sched_debug.cfs_rq[3]:/.avg->runnable_avg_sum
> 25079 ± 3% -10.1% 22542 ± 4% sched_debug.cfs_rq[3]:/.exec_clock
> 28 ± 17% -35.7% 18 ± 9% sched_debug.cfs_rq[3]:/.nr_spread_over
> 499222 ± 12% -59.7% 201330 ± 40% sched_debug.cpu#0.sched_goidle
> 1018389 ± 12% -58.2% 425747 ± 37% sched_debug.cpu#0.nr_switches
> 90529 ± 4% -17.6% 74603 ± 8% sched_debug.cpu#0.nr_load_updates
> 513982 ± 13% -56.9% 221386 ± 36% sched_debug.cpu#0.ttwu_count
> 1019018 ± 12% -58.2% 426387 ± 37% sched_debug.cpu#0.sched_count
> 320 ± 3% -14.3% 274 ± 13% sched_debug.cpu#0.load
> 323974 ± 21% +131.6% 750473 ± 12% sched_debug.cpu#1.sched_count
> 323373 ± 21% +131.9% 749837 ± 12% sched_debug.cpu#1.nr_switches
> 89555 ± 46% +230.0% 295518 ± 16% sched_debug.cpu#1.ttwu_local
> 13 ± 30% +59.0% 20 ± 8% sched_debug.cpu#1.cpu_load[2]
> 8 ± 41% +111.8% 18 ± 12% sched_debug.cpu#1.cpu_load[4]
> 68535 ± 4% +22.2% 83732 ± 1% sched_debug.cpu#1.nr_load_updates
> 10 ± 33% +84.1% 19 ± 9% sched_debug.cpu#1.cpu_load[3]
> 160382 ± 16% +122.7% 357238 ± 12% sched_debug.cpu#1.ttwu_count
> 151508 ± 22% +140.8% 364820 ± 12% sched_debug.cpu#1.sched_goidle
> 388481 ± 2% -42.8% 222376 ± 46% sched_debug.cpu#2.ttwu_local
> 87970 ± 3% -6.8% 81971 ± 6% sched_debug.cpu#2.nr_load_updates
> 452753 ± 3% -37.3% 283785 ± 36% sched_debug.cpu#2.ttwu_count
> 916511 ± 5% -36.7% 580526 ± 36% sched_debug.cpu#2.nr_switches
> 917118 ± 5% -36.6% 581168 ± 36% sched_debug.cpu#2.sched_count
> 448592 ± 5% -37.9% 278755 ± 38% sched_debug.cpu#2.sched_goidle
> 140376 ± 7% +179.3% 392097 ± 28% sched_debug.cpu#3.sched_goidle
> 68344 ± 2% +24.1% 84790 ± 8% sched_debug.cpu#3.nr_load_updates
> 78592 ± 33% +335.3% 342125 ± 33% sched_debug.cpu#3.ttwu_local
> 300663 ± 7% +168.1% 806077 ± 27% sched_debug.cpu#3.sched_count
> 149690 ± 12% +182.2% 422447 ± 26% sched_debug.cpu#3.ttwu_count
> 300054 ± 7% +168.5% 805498 ± 27% sched_debug.cpu#3.nr_switches
>
> testbox/testcase/testparams: bay/fileio/performance-600s-100%-1HDD-btrfs-64G-1024f-rndwr-sync
>
> f5c0a122800c301e 3a8b36f378060d20062a0918e9
> ---------------- --------------------------
> 1.32 ± 6% +8834.3% 117.71 ±171% fileio.request_latency_max_ms
> 44.70 ± 0% -56.7% 19.35 ± 0% fileio.requests_per_sec
> 156010 ± 0% +38.4% 215846 ± 0% fileio.time.voluntary_context_switches
> 2663864 ± 0% -6.2% 2499112 ± 0% fileio.time.file_system_outputs
> 156010 ± 0% +38.4% 215846 ± 0% time.voluntary_context_switches
> 39761 ± 1% +22.5% 48712 ± 2% softirqs.RCU
> 37048 ± 1% +17.1% 43380 ± 2% softirqs.SCHED
> 52147 ± 1% +15.3% 60140 ± 1% softirqs.TIMER
> 2142 ± 0% +4.6% 2239 ± 0% vmstat.system.in
> 4067 ± 0% +5.9% 4307 ± 0% vmstat.system.cs
> 315172 ± 0% -13.9% 271267 ± 0% meminfo.Active
> 296097 ± 0% -14.5% 253063 ± 0% meminfo.Active(file)
> 3678 ± 0% -42.1% 2131 ± 1% meminfo.Dirty
> 47204 ± 0% -14.5% 40351 ± 0% meminfo.SReclaimable
> 64571 ± 0% -10.7% 57634 ± 0% meminfo.Slab
> 74024 ± 0% -14.5% 63263 ± 0% proc-vmstat.nr_active_file
> 919 ± 0% -42.1% 532 ± 1% proc-vmstat.nr_dirty
> 11801 ± 0% -14.5% 10087 ± 0% proc-vmstat.nr_slab_reclaimable
> 59906 ± 0% -25.1% 44895 ± 0% proc-vmstat.pgactivate
> 1971 ± 5% -8.0% 1814 ± 3% slabinfo.anon_vma.active_objs
> 1971 ± 5% -8.0% 1814 ± 3% slabinfo.anon_vma.num_objs
> 1759 ± 7% -17.1% 1457 ± 5% slabinfo.btrfs_delayed_data_ref.active_objs
> 1768 ± 7% -17.2% 1464 ± 5% slabinfo.btrfs_delayed_data_ref.num_objs
> 1081 ± 15% -41.9% 628 ± 11% slabinfo.btrfs_delayed_tree_ref.active_objs
> 1082 ± 15% -41.9% 628 ± 11% slabinfo.btrfs_delayed_tree_ref.num_objs
> 2313 ± 1% -21.9% 1805 ± 0% slabinfo.btrfs_extent_buffer.num_objs
> 2301 ± 1% -22.1% 1792 ± 0% slabinfo.btrfs_extent_buffer.active_objs
> 13162 ± 0% -51.8% 6341 ± 0% slabinfo.btrfs_extent_state.num_objs
> 257 ± 0% -51.9% 123 ± 0% slabinfo.btrfs_extent_state.num_slabs
> 13152 ± 0% -51.8% 6341 ± 0% slabinfo.btrfs_extent_state.active_objs
> 257 ± 0% -51.9% 123 ± 0% slabinfo.btrfs_extent_state.active_slabs
> 715 ± 0% -46.2% 385 ± 5% slabinfo.btrfs_ordered_extent.active_objs
> 720 ± 0% -43.4% 408 ± 5% slabinfo.btrfs_ordered_extent.num_objs
> 26591 ± 0% -51.4% 12924 ± 0% slabinfo.btrfs_path.num_objs
> 949 ± 0% -51.4% 461 ± 0% slabinfo.btrfs_path.active_slabs
> 949 ± 0% -51.4% 461 ± 0% slabinfo.btrfs_path.num_slabs
> 26591 ± 0% -51.4% 12924 ± 0% slabinfo.btrfs_path.active_objs
> 670 ± 8% -39.2% 407 ± 0% slabinfo.ext4_extent_status.num_objs
> 670 ± 8% -39.2% 407 ± 0% slabinfo.ext4_extent_status.active_objs
> 503 ± 6% -13.2% 437 ± 8% slabinfo.mnt_cache.active_objs
> 522 ± 7% -13.4% 452 ± 6% slabinfo.mnt_cache.num_objs
> 26243 ± 0% -26.8% 19212 ± 0% slabinfo.radix_tree_node.num_objs
> 26243 ± 0% -26.8% 19212 ± 0% slabinfo.radix_tree_node.active_objs
> 937 ± 0% -26.8% 685 ± 0% slabinfo.radix_tree_node.active_slabs
> 937 ± 0% -26.8% 685 ± 0% slabinfo.radix_tree_node.num_slabs
>
> lkp-sb02: Sandy Bridge-EP
> Memory: 4G
>
> bay: Pentium D
> Memory: 2G
>
>
>
>
> fileio.requests_per_sec
>
> 50 ++---------------------------------------------------------------------+
> | |
> 45 *+.*..*...*..*..*..*...*..*..*..*...*..*..*..*..*...*..*..*..*...*..*..*
> 40 ++ |
> | |
> 35 ++ |
> | |
> 30 ++ |
> | |
> 25 ++ |
> 20 ++ |
> O O O O O |
> 15 ++ O O O O O O O O O O O O O |
> | |
> 10 ++--------------O------------------------------------------------------+
>
>
> fileio.time.file_system_outputs
>
> 2.6e+06 ++----------------------------------------------------------------+
> 2.5e+06 *+.*..*..*..*..*..*..*..*..*..*..*..*..*..*..*..*..*..*..*..*..*..*
> | |
> 2.4e+06 O+ O O O O O O O O O |
> 2.3e+06 ++ O O O O O O O O |
> 2.2e+06 ++ |
> 2.1e+06 ++ |
> | |
> 2e+06 ++ |
> 1.9e+06 ++ |
> 1.8e+06 ++ |
> 1.7e+06 ++ |
> | |
> 1.6e+06 ++ O |
> 1.5e+06 ++----------------------------------------------------------------+
>
>
> proc-vmstat.nr_active_file
>
> 75000 ++------------------------------------------------------------------+
> | |
> 70000 ++ .*..|
> *..*..*..*..*..*...*..*..*..*..*..*..*.. .*.. .*...*..*..*..*. *
> | *. *. |
> 65000 ++ |
> | |
> 60000 ++ |
> | O O |
> 55000 O+ O O O O O O O O O O O O O O O |
> | |
> | |
> 50000 ++ O |
> | |
> 45000 ++------------------------------------------------------------------+
>
>
> proc-vmstat.nr_dirty
>
> 1000 ++-------------------------------------------------------------------+
> *..*..*..*...*..*..*..*..*..*..*... .*.. .*.. .*..*..*...*..*..*..*
> 900 ++ *. *. *. |
> | |
> 800 ++ |
> | |
> 700 ++ |
> | |
> 600 ++ |
> | |
> 500 O+ O O O O O O O O O O O O O O O O O |
> | |
> 400 ++ O |
> | |
> 300 ++-------------------------------------------------------------------+
>
>
> proc-vmstat.nr_slab_reclaimable
>
> 12000 ++--------------------------*--*-----*-----*-----*---*-----*--*-----*
> | .. *. .. .. *. *. |
> *..*..*..*..*..*...*..*..* * * |
> 11500 ++ |
> | |
> | |
> 11000 ++ |
> | |
> 10500 ++ |
> | |
> | O O O O O O O O |
> 10000 ++ O O |
> O O O O O O O O |
> | |
> 9500 ++-------------O----------------------------------------------------+
>
>
> proc-vmstat.nr_dirtied
>
> 340000 *+-*--*--*--*--*--*--*--*--*--*---*--*--*--*--*--*--*--*--*--*--*--*
> | |
> 320000 ++ |
> | O |
> 300000 O+ O O O O O O O O O O O O O O O O |
> | |
> 280000 ++ |
> | |
> 260000 ++ |
> | |
> 240000 ++ |
> | |
> 220000 ++ |
> | |
> 200000 ++-------------O---------------------------------------------------+
>
>
> proc-vmstat.nr_written
>
> 340000 ++-*-----*--------*------------------*--*--*--*-----*--*--*--*-----*
> *. *. *..*. *..*..*..*...*. *. *. |
> 320000 ++ |
> | |
> 300000 O+ O O O O O O O O O O O O O O O O O |
> | |
> 280000 ++ |
> | |
> 260000 ++ |
> | |
> 240000 ++ |
> | |
> 220000 ++ |
> | |
> 200000 ++-------------O---------------------------------------------------+
>
>
> proc-vmstat.pgactivate
>
> 60000 ++---------------------------------------------------------------*--+
> | .. |
> 55000 *+.*..*..*..*..*...*..*..*..*..*..*..*..*..*..*..*...*..*..*..* *
> | |
> 50000 ++ |
> O O O O O O O O O O O O O O O O O |
> 45000 ++ O |
> | |
> 40000 ++ |
> | |
> 35000 ++ |
> | |
> 30000 ++ O |
> | |
> 25000 ++------------------------------------------------------------------+
>
>
> meminfo.Active
>
> 310000 ++-----------------------------------------------------------------+
> 300000 ++ *..|
> | .*..*..*..*.. .*... .*.. *.. .. *
> 290000 *+ *..*..*..*..*. *. .*.. .. *..*..*..* |
> 280000 ++ *. * |
> | |
> 270000 ++ |
> 260000 ++ |
> 250000 ++ |
> O O O O O O O O O O O O O O O O O |
> 240000 ++ O |
> 230000 ++ |
> | |
> 220000 ++ O |
> 210000 ++-----------------------------------------------------------------+
>
>
> meminfo.Active(file)
>
> 290000 ++-----------------------------------------------------------------+
> 280000 ++ *..|
> | .*..*..*..*..*..*..*..*..*..*... .*.. *..*.. .. *
> 270000 *+ *. *..*.. .. *..*..* |
> 260000 ++ * |
> | |
> 250000 ++ |
> 240000 ++ |
> 230000 ++ |
> O O O O O O O O O O O O O O O O O |
> 220000 ++ O |
> 210000 ++ |
> | |
> 200000 ++ O |
> 190000 ++-----------------------------------------------------------------+
>
>
> meminfo.Dirty
>
> 4000 ++-------------------------------------------------------------------+
> *..*..*..*...*..*..*..*..*..*..*... .*.. .*..*..*...*..*..*..*
> | *. *..*..*. |
> 3500 ++ |
> | |
> | |
> 3000 ++ |
> | |
> 2500 ++ |
> | |
> | |
> 2000 O+ O O O O O O O O O O O O O O O O O |
> | |
> | |
> 1500 ++--------------O----------------------------------------------------+
>
>
> meminfo.Slab
>
> 67000 ++------------------------------------------------------------------+
> 66000 ++ *..*.. .*.. *.. ..*.. .*.. .*..*
> | .. *. .. .*. *. *. |
> 65000 *+.*..*..*..*..*...*..*..* * *. |
> 64000 ++ |
> 63000 ++ |
> 62000 ++ |
> | |
> 61000 ++ |
> 60000 ++ |
> 59000 ++ O O O O O O O O O |
> 58000 ++ O O O O |
> O O O O O |
> 57000 ++ O |
> 56000 ++------------------------------------------------------------------+
>
>
> meminfo.SReclaimable
>
> 48000 ++--------------------------*--*-----*-----*-----*---*-----*--*-----*
> 47000 ++ .. *. .. .. *. *. |
> *..*..*..*..*..*...*..*..* * * |
> 46000 ++ |
> 45000 ++ |
> | |
> 44000 ++ |
> 43000 ++ |
> 42000 ++ |
> | |
> 41000 ++ O O O O O O O O |
> 40000 ++ O O |
> O O O O O O O O |
> 39000 ++ |
> 38000 ++-------------O----------------------------------------------------+
>
>
> [*] bisect-good sample
> [O] bisect-bad sample
>
> To reproduce:
>
> apt-get install ruby
> git clone git://git.kernel.org/pub/scm/linux/kernel/git/wfg/lkp-tests.git
> cd lkp-tests
> bin/setup-local job.yaml # the job file attached in this email
> bin/run-local job.yaml
Hi, thanks for this.
However this doesn't make sense to me.
This commit only touches btrfs' fsync handler and the test uses sysbench
without passing --file-fsync-freq to it, which means sysbench will never
do fsyncs according to its man page (default for fsync frequency is 0).
Or maybe I missed something?
thanks
>
>
> 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,
> Ying Huang
>
>
>
> _______________________________________________
> LKP mailing list
> LKP@linux.intel.com
>
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [LKP] [Btrfs] 3a8b36f3780: -62.6% fileio.requests_per_sec
2015-03-18 10:05 ` Filipe Manana
@ 2015-03-31 8:32 ` Huang Ying
2015-03-31 14:59 ` Filipe Manana
0 siblings, 1 reply; 6+ messages in thread
From: Huang Ying @ 2015-03-31 8:32 UTC (permalink / raw)
To: Filipe Manana; +Cc: Chris Mason, LKML, LKP ML
Hi, Filipe,
On Wed, 2015-03-18 at 10:05 +0000, Filipe Manana wrote:
[snip]
> Hi, thanks for this.
>
> However this doesn't make sense to me.
> This commit only touches btrfs' fsync handler and the test uses sysbench
> without passing --file-fsync-freq to it, which means sysbench will never
> do fsyncs according to its man page (default for fsync frequency is 0).
>
> Or maybe I missed something?
Sorry for late.
I checked source code of sysbench and found that the actual default
value of --file-fsync-freq is 100 instead of 0 in man page, as in the
following lines.
{"file-fsync-freq", "do fsync() after this number of requests (0 - don't use fsync())",
SB_ARG_TYPE_INT, "100"},
I double checked that via a debug patch to sysbench too.
Best Regards,
Huang, Ying
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [LKP] [Btrfs] 3a8b36f3780: -62.6% fileio.requests_per_sec
2015-03-31 8:32 ` Huang Ying
@ 2015-03-31 14:59 ` Filipe Manana
2015-04-01 4:59 ` Huang Ying
0 siblings, 1 reply; 6+ messages in thread
From: Filipe Manana @ 2015-03-31 14:59 UTC (permalink / raw)
To: Huang Ying; +Cc: Chris Mason, LKML, LKP ML
On 03/31/2015 09:32 AM, Huang Ying wrote:
> Hi, Filipe,
>
> On Wed, 2015-03-18 at 10:05 +0000, Filipe Manana wrote:
> [snip]
>
>> Hi, thanks for this.
>>
>> However this doesn't make sense to me.
>> This commit only touches btrfs' fsync handler and the test uses sysbench
>> without passing --file-fsync-freq to it, which means sysbench will never
>> do fsyncs according to its man page (default for fsync frequency is 0).
>>
>> Or maybe I missed something?
>
> Sorry for late.
>
> I checked source code of sysbench and found that the actual default
> value of --file-fsync-freq is 100 instead of 0 in man page, as in the
> following lines.
>
> {"file-fsync-freq", "do fsync() after this number of requests (0 - don't use fsync())",
> SB_ARG_TYPE_INT, "100"},
>
> I double checked that via a debug patch to sysbench too.
Ok, thanks for checking that.
What the 100 means is that an fsync is done after every 100 requests
(both writes and reads I assume).
The patch removed an optimization where we would not do any IO if no new
data was written to the file between 2 consecutive fsync requests and if
a btrfs transaction was committed between the 2 fsync requests as well
(by default it happens about every 30 seconds, changeable with -o
commit=xx). Which I think it's a rare/uncommon scenario.
With that optimization removed, the inode's metadata data is always
synced to disk
I've just tested on kvm guest with a debug kernel and got similar
decrease of file io requests as you reported.
The following brought back the performance for me (without reverting the
data loss fix from 3a8b36f37806 of course). Can you give it a try?
Thanks.
From: Filipe Manana <fdmanana@suse.com>
Date: Tue, 31 Mar 2015 14:16:52 +0100
Subject: [PATCH] Btrfs: avoid syncing log in the fast fsync path when not
necessary
Commit 3a8b36f37806 ("Btrfs: fix data loss in the fast fsync path") added
a performance regression for that causes an unnecessary sync of the log
trees (fs/subvol and root log trees) when 2 consecutive fsyncs are done
against a file, without no writes or any metadata updates to the inode in
between them and if a transaction is committed before the second fsync is
called.
Huang Ying reported this to lkml after a test sysbench test that measured
a -62% decrease of file io requests for that tests' workload.
The test is:
echo performance > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
echo performance > /sys/devices/system/cpu/cpu1/cpufreq/scaling_governor
echo performance > /sys/devices/system/cpu/cpu2/cpufreq/scaling_governor
echo performance > /sys/devices/system/cpu/cpu3/cpufreq/scaling_governor
mkfs -t btrfs /dev/sda2
mount -t btrfs /dev/sda2 /fs/sda2
cd /fs/sda2
for ((i = 0; i < 1024; i++)); do fallocate -l 67108864 testfile.$i; done
sysbench --test=fileio --max-requests=0 --num-threads=4 --max-time=600 \
--file-test-mode=rndwr --file-total-size=68719476736 --file-io-mode=sync \
--file-num=1024 run
A test on kvm guest, running a debug kernel gave me the following results:
Without 3a8b36f378060d: 16.01 reqs/sec
With 3a8b36f378060d: 3.39 reqs/sec
With 3a8b36f378060d and this patch: 16.04 reqs/sec
Reported-by: Huang Ying <ying.huang@intel.com>
Signed-off-by: Filipe Manana <fdmanana@suse.com>
---
fs/btrfs/file.c | 9 ++++++---
fs/btrfs/ordered-data.c | 14 ++++++++++++++
fs/btrfs/ordered-data.h | 3 +++
3 files changed, 23 insertions(+), 3 deletions(-)
diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index 309dd57..379275c 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -1878,6 +1878,7 @@ int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
struct btrfs_log_ctx ctx;
int ret = 0;
bool full_sync = 0;
+ const u64 len = end - start + 1;
trace_btrfs_sync_file(file, datasync);
@@ -1906,7 +1907,7 @@ int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
* all extents are persisted and the respective file extent
* items are in the fs/subvol btree.
*/
- ret = btrfs_wait_ordered_range(inode, start, end - start + 1);
+ ret = btrfs_wait_ordered_range(inode, start, len);
} else {
/*
* Start any new ordered operations before starting to log the
@@ -1978,8 +1979,10 @@ int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
*/
smp_mb();
if (btrfs_inode_in_log(inode, root->fs_info->generation) ||
- (full_sync && BTRFS_I(inode)->last_trans <=
- root->fs_info->last_trans_committed)) {
+ (BTRFS_I(inode)->last_trans <=
+ root->fs_info->last_trans_committed &&
+ (full_sync ||
+ !btrfs_have_ordered_extents_in_range(inode, start, len)))) {
/*
* We'v had everything committed since the last time we were
* modified so clear this flag in case it was set for whatever
diff --git a/fs/btrfs/ordered-data.c b/fs/btrfs/ordered-data.c
index 157cc54..72b6f0d 100644
--- a/fs/btrfs/ordered-data.c
+++ b/fs/btrfs/ordered-data.c
@@ -838,6 +838,20 @@ out:
return entry;
}
+bool btrfs_have_ordered_extents_in_range(struct inode *inode,
+ u64 file_offset,
+ u64 len)
+{
+ struct btrfs_ordered_extent *oe;
+
+ oe = btrfs_lookup_ordered_range(inode, file_offset, len);
+ if (oe) {
+ btrfs_put_ordered_extent(oe);
+ return true;
+ }
+ return false;
+}
+
/*
* lookup and return any extent before 'file_offset'. NULL is returned
* if none is found
diff --git a/fs/btrfs/ordered-data.h b/fs/btrfs/ordered-data.h
index e96cd4c..9ba7209 100644
--- a/fs/btrfs/ordered-data.h
+++ b/fs/btrfs/ordered-data.h
@@ -191,6 +191,9 @@ btrfs_lookup_first_ordered_extent(struct inode * inode, u64 file_offset);
struct btrfs_ordered_extent *btrfs_lookup_ordered_range(struct inode *inode,
u64 file_offset,
u64 len);
+bool btrfs_have_ordered_extents_in_range(struct inode *inode,
+ u64 file_offset,
+ u64 len);
int btrfs_ordered_update_i_size(struct inode *inode, u64 offset,
struct btrfs_ordered_extent *ordered);
int btrfs_find_ordered_sum(struct inode *inode, u64 offset, u64 disk_bytenr,
--
2.1.3
^ permalink raw reply related [flat|nested] 6+ messages in thread
* Re: [LKP] [Btrfs] 3a8b36f3780: -62.6% fileio.requests_per_sec
2015-03-31 14:59 ` Filipe Manana
@ 2015-04-01 4:59 ` Huang Ying
2015-04-01 9:56 ` Filipe Manana
0 siblings, 1 reply; 6+ messages in thread
From: Huang Ying @ 2015-04-01 4:59 UTC (permalink / raw)
To: Filipe Manana; +Cc: Chris Mason, LKML, LKP ML
On Tue, 2015-03-31 at 15:59 +0100, Filipe Manana wrote:
[snip]
> From: Filipe Manana <fdmanana@suse.com>
> Date: Tue, 31 Mar 2015 14:16:52 +0100
> Subject: [PATCH] Btrfs: avoid syncing log in the fast fsync path when not
> necessary
>
> Commit 3a8b36f37806 ("Btrfs: fix data loss in the fast fsync path") added
> a performance regression for that causes an unnecessary sync of the log
> trees (fs/subvol and root log trees) when 2 consecutive fsyncs are done
> against a file, without no writes or any metadata updates to the inode in
> between them and if a transaction is committed before the second fsync is
> called.
>
> Huang Ying reported this to lkml after a test sysbench test that measured
> a -62% decrease of file io requests for that tests' workload.
>
> The test is:
>
> echo performance > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
> echo performance > /sys/devices/system/cpu/cpu1/cpufreq/scaling_governor
> echo performance > /sys/devices/system/cpu/cpu2/cpufreq/scaling_governor
> echo performance > /sys/devices/system/cpu/cpu3/cpufreq/scaling_governor
> mkfs -t btrfs /dev/sda2
> mount -t btrfs /dev/sda2 /fs/sda2
> cd /fs/sda2
> for ((i = 0; i < 1024; i++)); do fallocate -l 67108864 testfile.$i; done
> sysbench --test=fileio --max-requests=0 --num-threads=4 --max-time=600 \
> --file-test-mode=rndwr --file-total-size=68719476736 --file-io-mode=sync \
> --file-num=1024 run
>
> A test on kvm guest, running a debug kernel gave me the following results:
>
> Without 3a8b36f378060d: 16.01 reqs/sec
> With 3a8b36f378060d: 3.39 reqs/sec
> With 3a8b36f378060d and this patch: 16.04 reqs/sec
>
> Reported-by: Huang Ying <ying.huang@intel.com>
I have tested your patch, the regression restored in our test. Thanks!
Tested-by: Huang, Ying <ying.huang@intel.com>
Best Regards,
Huang, Ying
[snip]
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [LKP] [Btrfs] 3a8b36f3780: -62.6% fileio.requests_per_sec
2015-04-01 4:59 ` Huang Ying
@ 2015-04-01 9:56 ` Filipe Manana
0 siblings, 0 replies; 6+ messages in thread
From: Filipe Manana @ 2015-04-01 9:56 UTC (permalink / raw)
To: Huang Ying; +Cc: Chris Mason, LKML, LKP ML
On 04/01/2015 05:59 AM, Huang Ying wrote:
> On Tue, 2015-03-31 at 15:59 +0100, Filipe Manana wrote:
>
> [snip]
>
>> From: Filipe Manana <fdmanana@suse.com>
>> Date: Tue, 31 Mar 2015 14:16:52 +0100
>> Subject: [PATCH] Btrfs: avoid syncing log in the fast fsync path when not
>> necessary
>>
>> Commit 3a8b36f37806 ("Btrfs: fix data loss in the fast fsync path") added
>> a performance regression for that causes an unnecessary sync of the log
>> trees (fs/subvol and root log trees) when 2 consecutive fsyncs are done
>> against a file, without no writes or any metadata updates to the inode in
>> between them and if a transaction is committed before the second fsync is
>> called.
>>
>> Huang Ying reported this to lkml after a test sysbench test that measured
>> a -62% decrease of file io requests for that tests' workload.
>>
>> The test is:
>>
>> echo performance > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor
>> echo performance > /sys/devices/system/cpu/cpu1/cpufreq/scaling_governor
>> echo performance > /sys/devices/system/cpu/cpu2/cpufreq/scaling_governor
>> echo performance > /sys/devices/system/cpu/cpu3/cpufreq/scaling_governor
>> mkfs -t btrfs /dev/sda2
>> mount -t btrfs /dev/sda2 /fs/sda2
>> cd /fs/sda2
>> for ((i = 0; i < 1024; i++)); do fallocate -l 67108864 testfile.$i; done
>> sysbench --test=fileio --max-requests=0 --num-threads=4 --max-time=600 \
>> --file-test-mode=rndwr --file-total-size=68719476736 --file-io-mode=sync \
>> --file-num=1024 run
>>
>> A test on kvm guest, running a debug kernel gave me the following results:
>>
>> Without 3a8b36f378060d: 16.01 reqs/sec
>> With 3a8b36f378060d: 3.39 reqs/sec
>> With 3a8b36f378060d and this patch: 16.04 reqs/sec
>>
>> Reported-by: Huang Ying <ying.huang@intel.com>
>
> I have tested your patch, the regression restored in our test. Thanks!
>
> Tested-by: Huang, Ying <ying.huang@intel.com>
Thank you very much for testing it and the report.
I'll now send the exact same patch, with your Tested-by tag, to the
btrfs mailing list, so that Chris can pick it from patchwork and can
more easily be noticed by the btrfs community (for review, test, etc).
regards,
Filipe Manana
>
> Best Regards,
> Huang, Ying
>
> [snip]
>
>
>
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2015-04-01 9:56 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
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2015-03-18 8:20 [LKP] [Btrfs] 3a8b36f3780: -62.6% fileio.requests_per_sec Huang Ying
2015-03-18 10:05 ` Filipe Manana
2015-03-31 8:32 ` Huang Ying
2015-03-31 14:59 ` Filipe Manana
2015-04-01 4:59 ` Huang Ying
2015-04-01 9:56 ` Filipe Manana
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