Message-ID: <YuzPMMnnY739Tnit@xsang-OptiPlex-9020>
Date:   Fri, 5 Aug 2022 16:05:04 +0800
From:   kernel test robot <oliver.sang@...el.com>
To:     John Garry <john.garry@...wei.com>
CC:     Christoph Hellwig <hch@....de>,
        Damien Le Moal <damien.lemoal@...nsource.wdc.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        LKML <linux-kernel@...r.kernel.org>,
        "Linux Memory Management List" <linux-mm@...ck.org>,
        <linux-ide@...r.kernel.org>, <lkp@...ts.01.org>, <lkp@...el.com>,
        <ying.huang@...el.com>, <feng.tang@...el.com>,
        <zhengjun.xing@...ux.intel.com>, <fengwei.yin@...el.com>
Subject: [ata]  0568e61225:  stress-ng.copy-file.ops_per_sec -15.0% regression



Greeting,

FYI, we noticed a -15.0% regression of stress-ng.copy-file.ops_per_sec due to commit:


commit: 0568e6122574dcc1aded2979cd0245038efe22b6 ("ata: libata-scsi: cap ata_device->max_sectors according to shost->max_sectors")
https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master

in testcase: stress-ng
on test machine: 96 threads 2 sockets Ice Lake with 256G memory
with following parameters:

	nr_threads: 10%
	disk: 1HDD
	testtime: 60s
	fs: f2fs
	class: filesystem
	test: copy-file
	cpufreq_governor: performance
	ucode: 0xb000280




If you fix the issue, kindly add following tag
Reported-by: kernel test robot <oliver.sang@...el.com>


Details are as below:
-------------------------------------------------------------------------------------------------->


To reproduce:

        git clone https://github.com/intel/lkp-tests.git
        cd lkp-tests
        sudo bin/lkp install job.yaml           # job file is attached in this email
        bin/lkp split-job --compatible job.yaml # generate the yaml file for lkp run
        sudo bin/lkp run generated-yaml-file

        # if come across any failure that blocks the test,
        # please remove ~/.lkp and /lkp dir to run from a clean state.

=========================================================================================
class/compiler/cpufreq_governor/disk/fs/kconfig/nr_threads/rootfs/tbox_group/test/testcase/testtime/ucode:
  filesystem/gcc-11/performance/1HDD/f2fs/x86_64-rhel-8.3/10%/debian-11.1-x86_64-20220510.cgz/lkp-icl-2sp1/copy-file/stress-ng/60s/0xb000280

commit: 
  4cbfca5f77 ("scsi: scsi_transport_sas: cap shost opt_sectors according to DMA optimal limit")
  0568e61225 ("ata: libata-scsi: cap ata_device->max_sectors according to shost->max_sectors")

4cbfca5f7750520f 0568e6122574dcc1aded2979cd0 
---------------- --------------------------- 
         %stddev     %change         %stddev
             \          |                \  
      1627           -14.9%       1385        stress-ng.copy-file.ops
     27.01           -15.0%      22.96        stress-ng.copy-file.ops_per_sec
   8935079           -11.9%    7870629        stress-ng.time.file_system_outputs
     14.88 ±  5%     -31.8%      10.14 ±  3%  stress-ng.time.percent_of_cpu_this_job_got
     50912           -14.7%      43413        vmstat.io.bo
     93.78            +1.4%      95.10        iostat.cpu.idle
      3.89           -31.6%       2.66        iostat.cpu.iowait
      4.01            -1.3        2.74        mpstat.cpu.all.iowait%
      0.23 ±  9%      -0.1        0.17 ± 11%  mpstat.cpu.all.sys%
      1.66 ± 37%      -1.2        0.51 ± 55%  perf-profile.calltrace.cycles-pp.f2fs_write_end.generic_perform_write.f2fs_buffered_write_iter.f2fs_file_write_iter.do_iter_readv_writev
      1.66 ± 37%      -1.1        0.59 ± 25%  perf-profile.children.cycles-pp.f2fs_write_end
      1.51 ± 40%      -1.1        0.45 ± 26%  perf-profile.children.cycles-pp.f2fs_dirty_data_folio
      1.21 ± 49%      -1.0        0.23 ± 33%  perf-profile.children.cycles-pp.f2fs_update_dirty_folio
      0.88 ± 56%      -0.8        0.04 ±111%  perf-profile.children.cycles-pp.native_queued_spin_lock_slowpath
      0.14 ± 26%      +0.1        0.25 ± 28%  perf-profile.children.cycles-pp.page_cache_ra_unbounded
      0.88 ± 56%      -0.8        0.04 ±112%  perf-profile.self.cycles-pp.native_queued_spin_lock_slowpath
   3164876 ±  9%     -20.2%    2524713 ±  7%  perf-stat.i.cache-misses
 4.087e+08            -4.6%  3.899e+08        perf-stat.i.dTLB-loads
    313050 ± 10%     -18.4%     255410 ±  6%  perf-stat.i.node-loads
    972573 ±  9%     -16.4%     812873 ±  6%  perf-stat.i.node-stores
   3114748 ±  9%     -20.2%    2484807 ±  7%  perf-stat.ps.cache-misses
 4.022e+08            -4.6%  3.837e+08        perf-stat.ps.dTLB-loads
    308178 ± 10%     -18.4%     251418 ±  6%  perf-stat.ps.node-loads
    956996 ±  9%     -16.4%     799948 ±  6%  perf-stat.ps.node-stores
    358486            -8.3%     328694        proc-vmstat.nr_active_file
   1121620           -11.9%     987816        proc-vmstat.nr_dirtied
    179906            -6.7%     167912        proc-vmstat.nr_dirty
   1151201            -1.7%    1131322        proc-vmstat.nr_file_pages
    100181            +9.9%     110078 ±  2%  proc-vmstat.nr_inactive_file
    846362           -14.6%     722471        proc-vmstat.nr_written
    358486            -8.3%     328694        proc-vmstat.nr_zone_active_file
    100181            +9.9%     110078 ±  2%  proc-vmstat.nr_zone_inactive_file
    180668            -6.8%     168456        proc-vmstat.nr_zone_write_pending
    556469            -3.5%     536985        proc-vmstat.pgactivate
   3385454           -14.6%    2889953        proc-vmstat.pgpgout




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.


-- 
0-DAY CI Kernel Test Service
https://01.org/lkp



View attachment "config-5.19.0-rc3-00027-g0568e6122574" of type "text/plain" (163907 bytes)

View attachment "job-script" of type "text/plain" (8488 bytes)

View attachment "job.yaml" of type "text/plain" (5842 bytes)

View attachment "reproduce" of type "text/plain" (531 bytes)

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