FYI, we found performance increasement, which is expected as commit patch says,
on `fsmark.files_per_sec' by c9dc4c6578502c2085705347375b82089aad18d0:
> commit c9dc4c6578502c2085705347375b82089aad18d0
> Author: Chris Mason <c...@fb.com>
> AuthorDate: Sat Apr 4 17:14:42 2015 -0700
> Commit: Chris Mason <c...@fb.com>
> CommitDate: Fri Apr 10 14:07:11 2015 -0700
>
> Btrfs: two stage dirty block group writeout
4c6d1d85ad89fd8e32dc9204b7f944854399bda9
c9dc4c6578502c2085705347375b82089aad18d0
----------------------------------------
----------------------------------------
run time(m) metric_value ±stddev run time(m) metric_value
±stddev change testbox/benchmark/testcase-params
--- ------ ---------------------------- --- ------
---------------------------- -------- ------------------------------
3 7.3 |35.267| ±0.5 5 6.6 |38.740|
±1.6 9.8% ivb44/fsmark/1x-1t-1HDD-btrfs-4M-60G-NoSync
NOTE: here are some more explanation about those test parameters for you to
know what the testcase does better:
1x: where 'x' means iterations or loop, corresponding to the 'L' option
of fsmark
1t, 64t: where 't' means thread
4M: means the single file size, corresponding to the '-s' option of fsmark
60G: means the total test size
And FYI, here are more changes by the same commit:
4c6d1d85ad89fd8e c9dc4c6578502c208570534737
---------------- --------------------------
%stddev %change %stddev
\ | \
9864 ± 2% +156.9% 25345 ± 4%
fsmark.time.voluntary_context_switches
9 ± 0% +17.8% 10 ± 4%
fsmark.time.percent_of_cpu_this_job_got
462211 ± 1% +16.8% 539707 ± 0% fsmark.app_overhead
35.27 ± 0% +9.8% 38.74 ± 1% fsmark.files_per_sec
435 ± 0% -9.0% 396 ± 1% fsmark.time.elapsed_time.max
435 ± 0% -9.0% 396 ± 1% fsmark.time.elapsed_time
5.20 ± 2% -70.3% 1.54 ± 6% turbostat.Pkg%pc6
2447873 ± 42% -67.9% 785086 ± 33% numa-numastat.node1.numa_hit
2413662 ± 43% -68.1% 771115 ± 31% numa-numastat.node1.local_node
9864 ± 2% +156.9% 25345 ± 4% time.voluntary_context_switches
187680 ± 10% +126.8% 425676 ± 7% numa-vmstat.node1.nr_dirty
747361 ± 9% +127.8% 1702809 ± 7% numa-meminfo.node1.Dirty
1787510 ± 1% +117.0% 3878984 ± 2% meminfo.Dirty
446861 ± 1% +117.0% 969472 ± 2% proc-vmstat.nr_dirty
1655962 ± 37% -59.3% 673988 ± 29% numa-vmstat.node1.numa_local
1036191 ± 8% +110.3% 2179311 ± 3% numa-meminfo.node0.Dirty
259069 ± 8% +110.3% 544783 ± 3% numa-vmstat.node0.nr_dirty
1687987 ± 37% -58.6% 698626 ± 29% numa-vmstat.node1.numa_hit
1 ± 0% +100.0% 2 ± 0% vmstat.procs.b
0.02 ± 0% +100.0% 0.04 ± 22% turbostat.CPU%c3
6.03 ± 1% +76.9% 10.67 ± 1% turbostat.CPU%c1
5.189e+08 ± 0% +72.6% 8.956e+08 ± 1% cpuidle.C1-IVT.time
2646692 ± 7% +75.0% 4630890 ± 23% cpuidle.C3-IVT.time
5301 ± 6% -31.7% 3620 ± 3%
slabinfo.btrfs_ordered_extent.active_objs
10549 ± 16% -30.3% 7349 ± 12%
numa-vmstat.node1.nr_slab_reclaimable
5353 ± 6% -31.4% 3670 ± 3%
slabinfo.btrfs_ordered_extent.num_objs
42169 ± 16% -30.3% 29397 ± 12% numa-meminfo.node1.SReclaimable
1619825 ± 22% +39.4% 2258188 ± 4% proc-vmstat.pgfree
4611 ± 7% -28.0% 3318 ± 1%
slabinfo.btrfs_delayed_ref_head.num_objs
4471 ± 8% -27.0% 3264 ± 2%
slabinfo.btrfs_delayed_ref_head.active_objs
67.93 ± 1% -24.7% 51.15 ± 4% turbostat.Pkg%pc2
2332975 ± 21% +45.6% 3396446 ± 4% numa-vmstat.node1.numa_other
2300949 ± 22% +46.5% 3371807 ± 4% numa-vmstat.node1.numa_miss
2300941 ± 22% +46.5% 3371793 ± 4% numa-vmstat.node0.numa_foreign
2952 ± 8% -23.3% 2263 ± 3%
slabinfo.btrfs_delayed_data_ref.num_objs
2570716 ± 3% +25.7% 3230157 ± 2% numa-meminfo.node1.Writeback
642367 ± 3% +25.7% 807533 ± 2% numa-vmstat.node1.nr_writeback
95408 ± 13% -17.3% 78910 ± 6% numa-meminfo.node1.Slab
2803 ± 7% -21.1% 2210 ± 3%
slabinfo.btrfs_delayed_data_ref.active_objs
240 ± 9% +23.1% 295 ± 16%
numa-vmstat.node0.nr_page_table_pages
4626942 ± 19% +49.6% 6924087 ± 22% cpuidle.C1E-IVT.time
5585235 ± 0% +25.5% 7011242 ± 0% meminfo.Writeback
1396232 ± 0% +25.5% 1752892 ± 0% proc-vmstat.nr_writeback
962 ± 9% +23.0% 1184 ± 16% numa-meminfo.node0.PageTables
9 ± 0% +17.8% 10 ± 4% time.percent_of_cpu_this_job_got
754027 ± 2% +25.2% 944312 ± 1% numa-vmstat.node0.nr_writeback
3018674 ± 2% +25.1% 3777338 ± 1% numa-meminfo.node0.Writeback
23509 ± 1% -16.9% 19530 ± 0% slabinfo.kmalloc-1024.active_objs
2972 ± 1% +21.4% 3607 ± 0% proc-vmstat.nr_alloc_batch
13956 ± 4% -15.6% 11773 ± 8% slabinfo.kmalloc-192.active_objs
743 ± 1% -16.0% 624 ± 0% slabinfo.kmalloc-1024.active_slabs
743 ± 1% -16.0% 624 ± 0% slabinfo.kmalloc-1024.num_slabs
23790 ± 1% -16.0% 19983 ± 0% slabinfo.kmalloc-1024.num_objs
68983 ± 2% +19.1% 82190 ± 4% softirqs.RCU
222 ± 11% +47.0% 326 ± 25% cpuidle.POLL.usage
14177 ± 0% +17.8% 16702 ± 1% slabinfo.kmalloc-2048.num_objs
14045 ± 0% +18.0% 16568 ± 1% slabinfo.kmalloc-2048.active_objs
885 ± 0% +17.8% 1043 ± 1% slabinfo.kmalloc-2048.num_slabs
885 ± 0% +17.8% 1043 ± 1% slabinfo.kmalloc-2048.active_slabs
14025 ± 4% -13.3% 12157 ± 7% slabinfo.kmalloc-192.num_objs
8287205 ± 10% +16.0% 9611684 ± 0% numa-numastat.node0.numa_hit
8276795 ± 10% +15.9% 9592682 ± 0% numa-numastat.node0.local_node
2615463 ± 5% -9.6% 2365256 ± 2% numa-vmstat.node1.nr_written
1814 ± 5% -12.7% 1584 ± 11% numa-meminfo.node1.PageTables
453 ± 5% -12.6% 396 ± 11%
numa-vmstat.node1.nr_page_table_pages
105943 ± 6% +13.6% 120352 ± 2% numa-meminfo.node0.SReclaimable
26492 ± 6% +13.6% 30086 ± 2%
numa-vmstat.node0.nr_slab_reclaimable
0.41 ± 1% +17.1% 0.48 ± 4% time.user_time
2155 ± 4% -11.1% 1916 ± 5%
slabinfo.btrfs_delayed_tree_ref.active_objs
2.028e+10 ± 0% -11.1% 1.803e+10 ± 1% cpuidle.C6-IVT.time
2155 ± 4% -10.8% 1922 ± 5%
slabinfo.btrfs_delayed_tree_ref.num_objs
1202 ± 4% -11.2% 1067 ± 9%
slabinfo.btrfs_trans_handle.num_objs
1202 ± 4% -11.2% 1067 ± 9%
slabinfo.btrfs_trans_handle.active_objs
192641 ± 5% +9.8% 211569 ± 2% numa-meminfo.node0.Slab
268137 ± 0% +12.2% 300911 ± 2% cpuidle.C6-IVT.usage
435 ± 0% -9.0% 396 ± 1% time.elapsed_time
435 ± 0% -9.0% 396 ± 1% time.elapsed_time.max
21057 ± 0% -9.0% 19165 ± 1% uptime.idle
29.89 ± 0% +37.2% 41.01 ± 3% turbostat.CorWatt
59.95 ± 0% +19.6% 71.69 ± 2% turbostat.PkgWatt
18873 ± 0% +14.9% 21692 ± 1% vmstat.system.cs
21 ± 2% +8.8% 23 ± 3% turbostat.Avg_MHz
135 ± 0% +9.1% 147 ± 0% iostat.sda.avgqu-sz
0.69 ± 2% +7.2% 0.74 ± 3% turbostat.%Busy
7478 ± 0% +5.1% 7861 ± 0% iostat.sda.await
7478 ± 0% +5.1% 7861 ± 0% iostat.sda.w_await
239 ± 0% +3.6% 247 ± 0% iostat.sda.wrqm/s
3.54 ± 0% +3.9% 3.68 ± 0% turbostat.RAMWatt
129619 ± 0% +3.2% 133743 ± 0% vmstat.io.bo
128667 ± 0% +1.9% 131056 ± 0% iostat.sda.wkB/s
--yliu
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