Re: [btrfs] 4c468fd7485: +7.8% blogbench.write_score, -5.1% turbostat.Pkg_W

[Fengguang Wu <fengguang.wu@intel.com>]

Hi Abhay,

On Sat, Aug 16, 2014 at 05:30:35PM +0530, Abhay Sachan wrote:
> Hi Fengguag,
> Sorry for the out of topic question, but what benchmark is this?
> I have heard about blogbench, but it doesn't give output in this format AFAIK.

It is blogbench run in the lkp-tests framework.

https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/

It will collect various system stats when blogbench runs. Then it
presents you the collected blogbench stats together with slabinfo,
meminfo, proc-vmstat, turbostat, softirqs etc. stats.

The basic steps to reproduce this report are

        $ split-job jobs/blogbench.yaml
        jobs/blogbench.yaml => ./blogbench-1HDD-ext4.yaml
        jobs/blogbench.yaml => ./blogbench-1HDD-xfs.yaml
        jobs/blogbench.yaml => ./blogbench-1HDD-btrfs.yaml

        # requires debian/ubuntu for now
        $ bin/setup-local --hdd /dev/sdaX ./blogbench-1HDD-btrfs.yaml

        $ bin/run-local ./blogbench-1HDD-btrfs.yaml

The report is generated by the "sbin/compare" script.

Thanks,
Fengguang

> On Sat, Aug 16, 2014 at 1:22 PM, Fengguang Wu <fengguang.wu@intel.com> wrote:
> > Hi Chris,
> >
> > FYI, we noticed increased performance and reduced power consumption on
> >
> > commit 4c468fd74859d901c0b78b42bef189295e00d74f ("btrfs: disable strict file flushes for renames and truncates")
> >
> > test case: lkp-sb02/blogbench/1HDD-btrfs
> >
> > 0954d74f8f37a47  4c468fd74859d901c0b78b42b
> > ---------------  -------------------------
> >       1094 ± 1%      +7.8%       1180 ± 2%  TOTAL blogbench.write_score
> >       1396 ±19%    -100.0%          0 ± 0%  TOTAL slabinfo.btrfs_delalloc_work.active_objs
> >       1497 ±17%    -100.0%          0 ± 0%  TOTAL slabinfo.btrfs_delalloc_work.num_objs
> >        426 ±45%    -100.0%          0 ± 0%  TOTAL proc-vmstat.nr_vmscan_write
> >       1.02 ±38%    +193.1%       2.99 ±37%  TOTAL turbostat.%pc6
> >       0.12 ±48%    +113.8%       0.25 ±29%  TOTAL turbostat.%pc3
> >       0.38 ±18%    +117.7%       0.84 ±34%  TOTAL turbostat.%pc2
> >      19377 ±14%     -50.9%       9520 ±20%  TOTAL proc-vmstat.workingset_refault
> >         44 ±41%     +68.8%         75 ±28%  TOTAL cpuidle.POLL.usage
> >      31549 ± 1%     +95.7%      61732 ± 1%  TOTAL softirqs.BLOCK
> >       4547 ±10%     -38.3%       2804 ± 9%  TOTAL slabinfo.btrfs_ordered_extent.active_objs
> >       4628 ±10%     -37.1%       2913 ± 9%  TOTAL slabinfo.btrfs_ordered_extent.num_objs
> >      17597 ± 8%     -30.2%      12291 ±14%  TOTAL proc-vmstat.nr_writeback
> >      70335 ± 8%     -30.1%      49174 ±14%  TOTAL meminfo.Writeback
> >       3606 ± 6%     -29.1%       2556 ±10%  TOTAL slabinfo.mnt_cache.active_objs
> >      14763 ±12%     -29.9%      10350 ± 8%  TOTAL proc-vmstat.nr_dirty
> >       3766 ± 5%     -27.8%       2720 ±10%  TOTAL slabinfo.mnt_cache.num_objs
> >       3509 ± 6%     -28.5%       2510 ±11%  TOTAL slabinfo.kmalloc-4096.active_objs
> >      59201 ±11%     -30.1%      41396 ± 8%  TOTAL meminfo.Dirty
> >        479 ±13%     -30.5%        333 ±10%  TOTAL slabinfo.kmalloc-4096.num_slabs
> >        479 ±13%     -30.5%        333 ±10%  TOTAL slabinfo.kmalloc-4096.active_slabs
> >       3636 ± 6%     -26.6%       2669 ±10%  TOTAL slabinfo.kmalloc-4096.num_objs
> >       6040 ± 8%     -28.6%       4314 ± 6%  TOTAL slabinfo.kmalloc-96.num_objs
> >       5358 ± 5%     -25.1%       4011 ± 7%  TOTAL slabinfo.kmalloc-96.active_objs
> >     757208 ± 4%     -22.1%     589874 ± 4%  TOTAL meminfo.MemFree
> >     189508 ± 4%     -22.2%     147518 ± 4%  TOTAL proc-vmstat.nr_free_pages
> >     762781 ± 4%     -21.1%     601525 ± 4%  TOTAL vmstat.memory.free
> >      10491 ± 2%     -16.8%       8725 ± 2%  TOTAL slabinfo.kmalloc-64.num_objs
> >       2513 ± 4%     +16.3%       2923 ± 4%  TOTAL slabinfo.kmalloc-128.active_objs
> >       9768 ± 3%     -15.1%       8298 ± 1%  TOTAL slabinfo.kmalloc-64.active_objs
> >       2627 ± 4%     +14.0%       2995 ± 4%  TOTAL slabinfo.kmalloc-128.num_objs
> >      96242 ± 2%     +15.5%     111120 ± 2%  TOTAL slabinfo.btrfs_path.active_objs
> >       3448 ± 2%     +15.1%       3968 ± 2%  TOTAL slabinfo.btrfs_path.num_slabs
> >       3448 ± 2%     +15.1%       3968 ± 2%  TOTAL slabinfo.btrfs_path.active_slabs
> >      96580 ± 2%     +15.1%     111132 ± 2%  TOTAL slabinfo.btrfs_path.num_objs
> >       2526 ± 2%     +13.5%       2867 ± 1%  TOTAL slabinfo.btrfs_extent_state.num_slabs
> >       2526 ± 2%     +13.5%       2867 ± 1%  TOTAL slabinfo.btrfs_extent_state.active_slabs
> >     106133 ± 2%     +13.5%     120434 ± 1%  TOTAL slabinfo.btrfs_extent_state.num_objs
> >     104326 ± 2%     +12.3%     117189 ± 1%  TOTAL slabinfo.btrfs_extent_state.active_objs
> >     110759 ± 2%     +13.4%     125640 ± 2%  TOTAL slabinfo.btrfs_inode.active_objs
> >     110759 ± 2%     +13.4%     125642 ± 2%  TOTAL slabinfo.btrfs_delayed_node.active_objs
> >       4261 ± 2%     +13.4%       4832 ± 2%  TOTAL slabinfo.btrfs_delayed_node.num_slabs
> >       4261 ± 2%     +13.4%       4832 ± 2%  TOTAL slabinfo.btrfs_delayed_node.active_slabs
> >     110797 ± 2%     +13.4%     125663 ± 2%  TOTAL slabinfo.btrfs_delayed_node.num_objs
> >     110815 ± 2%     +13.4%     125669 ± 2%  TOTAL slabinfo.btrfs_inode.num_objs
> >       6926 ± 2%     +13.4%       7853 ± 2%  TOTAL slabinfo.btrfs_inode.num_slabs
> >       6926 ± 2%     +13.4%       7853 ± 2%  TOTAL slabinfo.btrfs_inode.active_slabs
> >       5607 ± 3%     -11.0%       4991 ± 3%  TOTAL slabinfo.kmalloc-256.active_objs
> >       6077 ± 2%      -9.9%       5476 ± 3%  TOTAL slabinfo.kmalloc-256.num_objs
> >      11153 ± 1%      -7.7%      10295 ± 2%  TOTAL proc-vmstat.nr_slab_unreclaimable
> >     547824 ± 3%     +16.5%     638368 ± 8%  TOTAL meminfo.Inactive(file)
> >     112124 ± 2%     +11.6%     125105 ± 2%  TOTAL slabinfo.radix_tree_node.active_objs
> >     112169 ± 2%     +11.6%     125134 ± 2%  TOTAL slabinfo.radix_tree_node.num_objs
> >       4005 ± 2%     +11.6%       4468 ± 2%  TOTAL slabinfo.radix_tree_node.num_slabs
> >       4005 ± 2%     +11.6%       4468 ± 2%  TOTAL slabinfo.radix_tree_node.active_slabs
> >     551119 ± 3%     +16.4%     641663 ± 8%  TOTAL meminfo.Inactive
> >     285596 ± 2%     +11.4%     318160 ± 2%  TOTAL meminfo.SReclaimable
> >        156 ± 3%    +118.0%        340 ± 2%  TOTAL iostat.sda.w/s
> >        282 ± 3%     -43.2%        160 ± 3%  TOTAL iostat.sda.avgrq-sz
> >       1.45 ±12%     -28.9%       1.03 ±18%  TOTAL iostat.sda.rrqm/s
> >        633 ± 2%     -26.5%        465 ± 2%  TOTAL iostat.sda.wrqm/s
> >     154423 ± 5%     +17.4%     181309 ± 3%  TOTAL time.voluntary_context_switches
> >        536 ± 5%     -11.5%        474 ± 9%  TOTAL iostat.sda.await
> >     102.71 ± 5%     +10.4%     113.36 ± 6%  TOTAL iostat.sda.avgqu-sz
> >      20842 ± 2%      -6.5%      19493 ± 2%  TOTAL iostat.sda.wkB/s
> >      20856 ± 2%      -6.4%      19525 ± 2%  TOTAL vmstat.io.bo
> >      75.48 ± 4%      -6.9%      70.27 ± 5%  TOTAL turbostat.%c0
> >        285 ± 4%      -6.6%        266 ± 5%  TOTAL time.percent_of_cpu_this_job_got
> >      34.58 ± 2%      -5.5%      32.68 ± 3%  TOTAL turbostat.Cor_W
> >      39.86 ± 2%      -5.1%      37.82 ± 3%  TOTAL turbostat.Pkg_W
> >       5805 ± 1%      -4.3%       5558 ± 3%  TOTAL vmstat.system.in
> >   10069454 ± 1%      +6.3%   10699830 ± 1%  TOTAL time.file_system_outputs
> >
> >
> > 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,
> > Fengguang
> 
> 
> 
> -- 
> Abhay