Re: [mm] e6e88712e4: stress-ng.tmpfs.ops_per_sec -69.7% regression

From: Matthew Wilcox
Date: Fri Oct 30 2020 - 11:02:08 EST


On Fri, Oct 30, 2020 at 10:02:45PM +0800, Chen, Rong A wrote:
> On 10/30/2020 9:17 PM, Matthew Wilcox wrote:
> > On Fri, Oct 30, 2020 at 03:17:15PM +0800, kernel test robot wrote:
> > > Details are as below:
> > > -------------------------------------------------------------------------------------------------->
> > >
> > >
> > > To reproduce:
> > >
> > > git clone https://github.com/intel/lkp-tests.git
> > > cd lkp-tests
> > > bin/lkp install job.yaml # job file is attached in this email
> > > bin/lkp run job.yaml
> >
> > Do you actually test these instructions before you send them out?
> >
> > hdd_partitions: "/dev/disk/by-id/ata-WDC_WD2500BEKT-00PVMT0_WD-WX11A23L4840-part
> > 1"
> > ssd_partitions: "/dev/nvme1n1p1 /dev/nvme0n1p1"
> > rootfs_partition: "/dev/disk/by-id/ata-INTEL_SSDSC2CW240A3_CVCV204303WP240CGN-part1"
> >
> > That's _very_ specific to a given machine. I'm not familiar with
> > this test, so I don't know what I need to change.
>
>
> Hi Matthew,
>
> Sorry about that, I copied the job.yaml file from the server,
> the right way to do is to set your disk partitions in the yaml,
> please see https://github.com/intel/lkp-tests#run-your-own-disk-partitions.
>
> there is another reproduce script attached in the original mail
> for your reference.

Can you reproduce this? Here's my results:

# stress-ng "--timeout" "100" "--times" "--verify" "--metrics-brief" "--sequential" "96" "--class" "memory" "--minimize" "--exclude" "spawn,exec,swap,stack,atomic,bad-altstack,bsearch,context,full,heapsort,hsearch,judy,lockbus,lsearch,malloc,matrix-3d,matrix,mcontend,membarrier,memcpy,memfd,memrate,memthrash,mergesort,mincore,null,numa,pipe,pipeherd,qsort,radixsort,remap,resources,rmap,shellsort,skiplist,stackmmap,str,stream,tlb-shootdown,tree,tsearch,vm-addr,vm-rw,vm-segv,vm,wcs,zero,zlib"
stress-ng: info: [7670] disabled 'oom-pipe' as it may hang or reboot the machine (enable it with the --pathological option)
stress-ng: info: [7670] dispatching hogs: 96 tmpfs
stress-ng: info: [7670] successful run completed in 100.23s (1 min, 40.23 secs)
stress-ng: info: [7670] stressor bogo ops real time usr time sys time bogo ops/s bogo ops/s
stress-ng: info: [7670] (secs) (secs) (secs) (real time) (usr+sys time)
stress-ng: info: [7670] tmpfs 8216 100.10 368.02 230.89 82.08 13.72
stress-ng: info: [7670] for a 100.23s run time:
stress-ng: info: [7670] 601.38s available CPU time
stress-ng: info: [7670] 368.71s user time ( 61.31%)
stress-ng: info: [7670] 231.55s system time ( 38.50%)
stress-ng: info: [7670] 600.26s total time ( 99.81%)
stress-ng: info: [7670] load average: 78.32 27.87 10.10