Re: [lkp] [xfs] ad68972acb: xfstests.time.file_system_outputs -6.0% improvement

From: Ye Xiaolong
Date: Wed Apr 06 2016 - 21:39:08 EST

Please ignore this report, we just found that it was tested on a virtual
machine, its result is not so reliable. Sorry for that.

On Thu, Apr 07, 2016 at 09:12:45AM +0800, kernel test robot wrote:
>FYI, we noticed that xfstests.time.file_system_outputs -6.0% improvement on
>
>https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
>commit ad68972acb82c3e8bba316d542ab204984cb1f1c ("xfs: xfs_cluster_write is redundant")
>
>
>=========================================================================================
>compiler/disk/fs/kconfig/rootfs/tbox_group/test/testcase:
> gcc-4.9/4HDD/xfs/x86_64-rhel/debian-x86_64-2015-02-07.cgz/vm-kbuild-4G/generic-127/xfstests
>
>commit:
> fbcc025613590d7b1d15521555dcc6393a148a6b
> ad68972acb82c3e8bba316d542ab204984cb1f1c
>
>fbcc025613590d7b ad68972acb82c3e8bba316d542
>---------------- --------------------------
> %stddev %change %stddev
> \ | \
> 8055643 ± 0% -6.0% 7568459 ± 0% xfstests.time.file_system_outputs
> 11.74 ± 2% +28.9% 15.13 ± 21% xfstests.time.user_time
> 11.74 ± 2% +28.9% 15.13 ± 21% time.user_time
>
>
>vm-kbuild-4G: qemu-system-x86_64 -enable-kvm -cpu qemu64,+ssse3
>Memory: 4G
>
>
>
> xfstests.time.file_system_outputs
>
> 9e+06 ++------------------------------------------------------------------+
> *.*.*.*.*.*.*.*.*.*.*.* *.*.*.*.*.*.*.*.*.*.*.*.* *.*.*.*.*.*.*.*
> 8e+06 O+O O O O O O O O O O O O O O O O O O O O O O : |
> 7e+06 ++ : : : : |
> | : : : : |
> 6e+06 ++ : : : : |
> 5e+06 ++ : : : : |
> | : : : : |
> 4e+06 ++ : : : : |
> 3e+06 ++ : : : : |
> | : : : : |
> 2e+06 ++ : : |
> 1e+06 ++ : : |
> | : : |
> 0 ++--O-O-O-O-------------*---------------------------*---------------+
>
>
>
> [*] bisect-good sample
> [O] bisect-bad sample
>
>To reproduce:
>
> git clone git://git.kernel.org/pub/scm/linux/kernel/git/wfg/lkp-tests.git
> cd lkp-tests
> bin/lkp install job.yaml # job file is attached in this email
> bin/lkp run 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,
>Xiaolong Ye

>---
>LKP_SERVER: inn
>LKP_CGI_PORT: 80
>LKP_CIFS_PORT: 139
>testcase: xfstests
>default-monitors:
> wait: activate-monitor
> kmsg:
> heartbeat:
> interval: 10
>default-watchdogs:
> oom-killer:
> watchdog:
>cpufreq_governor:
>model: qemu-system-x86_64 -enable-kvm -cpu qemu64,+ssse3
>nr_vm: 6
>nr_cpu: 4
>memory: 4G
>rootfs: debian-x86_64-2015-02-07.cgz
>hdd_partitions: "/dev/vda /dev/vdb /dev/vdc /dev/vdd /dev/vde /dev/vdf"
>swap_partitions: "/dev/vdg"
>ssh_base_port: 23032
>category: functional
>disk: 4HDD
>fs: xfs
>xfstests:
> test: generic-127
>branch: scsi/misc
>commit: ad68972acb82c3e8bba316d542ab204984cb1f1c
>queue: bisect
>repeat_to: 2
>testbox: vm-kbuild-4G-3
>tbox_group: vm-kbuild-4G
>kconfig: x86_64-rhel
>enqueue_time: 2016-04-02 17:18:10.328935599 +08:00
>compiler: gcc-4.9
>id: 12de6ecf92d02c668f45f8c0c55ae8b553c74100
>user: lkp
>head_commit: 00e8a46b50f800991e89446fb98dcad5f72e786f
>base_commit: f55532a0c0b8bb6148f4e07853b876ef73bc69ca
>result_root: "/result/xfstests/4HDD-xfs-generic-127/vm-kbuild-4G/debian-x86_64-2015-02-07.cgz/x86_64-rhel/gcc-4.9/ad68972acb82c3e8bba316d542ab204984cb1f1c/0"
>job_file: "/lkp/scheduled/vm-kbuild-4G-3/bisect_xfstests-4HDD-xfs-generic-127-debian-x86_64-2015-02-07.cgz-x86_64-rhel-ad68972acb82c3e8bba316d542ab204984cb1f1c-20160402-87765-161tnhy-0.yaml"
>max_uptime: 3600
>initrd: "/osimage/debian/debian-x86_64-2015-02-07.cgz"
>bootloader_append:
>- root=/dev/ram0
>- user=lkp
>- job=/lkp/scheduled/vm-kbuild-4G-3/bisect_xfstests-4HDD-xfs-generic-127-debian-x86_64-2015-02-07.cgz-x86_64-rhel-ad68972acb82c3e8bba316d542ab204984cb1f1c-20160402-87765-161tnhy-0.yaml
>- ARCH=x86_64
>- kconfig=x86_64-rhel
>- branch=scsi/misc
>- commit=ad68972acb82c3e8bba316d542ab204984cb1f1c
>- BOOT_IMAGE=/pkg/linux/x86_64-rhel/gcc-4.9/ad68972acb82c3e8bba316d542ab204984cb1f1c/vmlinuz-4.5.0-rc2-00004-gad68972
>- max_uptime=3600
>- RESULT_ROOT=/result/xfstests/4HDD-xfs-generic-127/vm-kbuild-4G/debian-x86_64-2015-02-07.cgz/x86_64-rhel/gcc-4.9/ad68972acb82c3e8bba316d542ab204984cb1f1c/0
>- LKP_SERVER=inn
>- |2-
>
>
> earlyprintk=ttyS0,115200 systemd.log_level=err
> debug apic=debug sysrq_always_enabled rcupdate.rcu_cpu_stall_timeout=100
> panic=-1 softlockup_panic=1 nmi_watchdog=panic oops=panic load_ramdisk=2 prompt_ramdisk=0
> console=ttyS0,115200 console=tty0 vga=normal
>
> rw
>lkp_initrd: "/lkp/lkp/lkp-x86_64.cgz"
>modules_initrd: "/pkg/linux/x86_64-rhel/gcc-4.9/ad68972acb82c3e8bba316d542ab204984cb1f1c/modules.cgz"
>bm_initrd: "/osimage/deps/debian-x86_64-2015-02-07.cgz/lkp.cgz,/osimage/deps/debian-x86_64-2015-02-07.cgz/run-ipconfig.cgz,/osimage/deps/debian-x86_64-2015-02-07.cgz/fs.cgz,/osimage/deps/debian-x86_64-2015-02-07.cgz/xfstests.cgz,/lkp/benchmarks/xfstests.cgz"
>linux_headers_initrd: "/pkg/linux/x86_64-rhel/gcc-4.9/ad68972acb82c3e8bba316d542ab204984cb1f1c/linux-headers.cgz"
>kernel: "/pkg/linux/x86_64-rhel/gcc-4.9/ad68972acb82c3e8bba316d542ab204984cb1f1c/vmlinuz-4.5.0-rc2-00004-gad68972"
>dequeue_time: 2016-04-02 17:22:24.997334668 +08:00
>job_state: finished
>loadavg: 0.92 0.99 0.93 1/116 2273
>start_time: '1459588990'
>end_time: '1459591516'
>version: "/lkp/lkp/.src-20160401-231508"

>2016-04-02 17:23:01 mkfs -t xfs /dev/vdb
>2016-04-02 17:23:01 mkfs -t xfs /dev/vda
>2016-04-02 17:23:01 mkfs -t xfs /dev/vdc
>2016-04-02 17:23:01 mkfs -t xfs /dev/vdd
>2016-04-02 17:23:09 mount -t xfs -o nobarrier,inode64 /dev/vda /fs/vda
>2016-04-02 17:23:09 mount -t xfs -o nobarrier,inode64 /dev/vdb /fs/vdb
>2016-04-02 17:23:09 mount -t xfs -o nobarrier,inode64 /dev/vdc /fs/vdc
>2016-04-02 17:23:09 mount -t xfs -o nobarrier,inode64 /dev/vdd /fs/vdd
>2016-04-02 17:23:10 export TEST_DIR=/fs/vda
>2016-04-02 17:23:10 export TEST_DEV=/dev/vda
>2016-04-02 17:23:10 export FSTYP=xfs
>2016-04-02 17:23:10 export SCRATCH_MNT=/fs/scratch
>2016-04-02 17:23:10 mkdir /fs/scratch -p
>2016-04-02 17:23:10 export SCRATCH_DEV=/dev/vdd
>2016-04-02 17:23:10 export SCRATCH_LOGDEV=/dev/vdb
>2016-04-02 17:23:10 ./check generic/127