From: Christian Schoenebeck <qemu_oss@crudebyte.com>
To: qemu-devel@nongnu.org
Cc: "Dr. David Alan Gilbert" <dgilbert@redhat.com>,
Vivek Goyal <vgoyal@redhat.com>,
"Venegas Munoz,
Jose Carlos" <jose.carlos.venegas.munoz@intel.com>,
"cdupontd@redhat.com" <cdupontd@redhat.com>,
virtio-fs-list <virtio-fs@redhat.com>,
Stefan Hajnoczi <stefanha@redhat.com>,
"Shinde, Archana M" <archana.m.shinde@intel.com>
Subject: Re: virtiofs vs 9p performance(Re: tools/virtiofs: Multi threading seems to hurt performance)
Date: Fri, 25 Sep 2020 15:04:06 +0200 [thread overview]
Message-ID: <4973513.bp6ERB8pJA@silver> (raw)
In-Reply-To: <20200925124139.GJ2873@work-vm>
On Freitag, 25. September 2020 14:41:39 CEST Dr. David Alan Gilbert wrote:
> > Hi Carlos,
> >
> > So you are running following test.
> >
> > fio --direct=1 --gtod_reduce=1 --name=test
> > --filename=random_read_write.fio --bs=4k --iodepth=64 --size=4G
> > --readwrite=randrw --rwmixread=75 --output=/output/fio.txt
> >
> > And following are your results.
> >
> > 9p
> > --
> > READ: bw=211MiB/s (222MB/s), 211MiB/s-211MiB/s (222MB/s-222MB/s),
> > io=3070MiB (3219MB), run=14532-14532msec
> >
> > WRITE: bw=70.6MiB/s (74.0MB/s), 70.6MiB/s-70.6MiB/s (74.0MB/s-74.0MB/s),
> > io=1026MiB (1076MB), run=14532-14532msec
> >
> > virtiofs
> > --------
> >
> > Run status group 0 (all jobs):
> > READ: bw=159MiB/s (167MB/s), 159MiB/s-159MiB/s (167MB/s-167MB/s),
> > io=3070MiB (3219MB), run=19321-19321msec>
> > WRITE: bw=53.1MiB/s (55.7MB/s), 53.1MiB/s-53.1MiB/s (55.7MB/s-55.7MB/s),
> > io=1026MiB (1076MB), run=19321-19321msec>
> > So looks like you are getting better performance with 9p in this case.
>
> That's interesting, because I've just tried similar again with my
> ramdisk setup:
>
> fio --direct=1 --gtod_reduce=1 --name=test --filename=random_read_write.fio
> --bs=4k --iodepth=64 --size=4G --readwrite=randrw --rwmixread=75
> --output=aname.txt
>
>
> virtiofs default options
> test: (g=0): rw=randrw, bs=(R) 4096B-4096B, (W) 4096B-4096B, (T)
> 4096B-4096B, ioengine=psync, iodepth=64 fio-3.21
> Starting 1 process
> test: Laying out IO file (1 file / 4096MiB)
>
> test: (groupid=0, jobs=1): err= 0: pid=773: Fri Sep 25 12:28:32 2020
> read: IOPS=18.3k, BW=71.3MiB/s (74.8MB/s)(3070MiB/43042msec)
> bw ( KiB/s): min=70752, max=77280, per=100.00%, avg=73075.71,
> stdev=1603.47, samples=85 iops : min=17688, max=19320, avg=18268.92,
> stdev=400.86, samples=85 write: IOPS=6102, BW=23.8MiB/s
> (24.0MB/s)(1026MiB/43042msec); 0 zone resets bw ( KiB/s): min=23128,
> max=25696, per=100.00%, avg=24420.40, stdev=583.08, samples=85 iops
> : min= 5782, max= 6424, avg=6105.09, stdev=145.76, samples=85 cpu
> : usr=0.10%, sys=30.09%, ctx=1245312, majf=0, minf=6 IO depths :
> 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit :
> 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete :
> 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts:
> total=785920,262656,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0,
> window=0, percentile=100.00%, depth=64
>
> Run status group 0 (all jobs):
> READ: bw=71.3MiB/s (74.8MB/s), 71.3MiB/s-71.3MiB/s (74.8MB/s-74.8MB/s),
> io=3070MiB (3219MB), run=43042-43042msec WRITE: bw=23.8MiB/s (24.0MB/s),
> 23.8MiB/s-23.8MiB/s (24.0MB/s-24.0MB/s), io=1026MiB (1076MB),
> run=43042-43042msec
>
> virtiofs cache=none
> test: (g=0): rw=randrw, bs=(R) 4096B-4096B, (W) 4096B-4096B, (T)
> 4096B-4096B, ioengine=psync, iodepth=64 fio-3.21
> Starting 1 process
>
> test: (groupid=0, jobs=1): err= 0: pid=740: Fri Sep 25 12:30:57 2020
> read: IOPS=22.9k, BW=89.6MiB/s (93.0MB/s)(3070MiB/34256msec)
> bw ( KiB/s): min=89048, max=94240, per=100.00%, avg=91871.06,
> stdev=967.87, samples=68 iops : min=22262, max=23560, avg=22967.76,
> stdev=241.97, samples=68 write: IOPS=7667, BW=29.0MiB/s
> (31.4MB/s)(1026MiB/34256msec); 0 zone resets bw ( KiB/s): min=29264,
> max=32248, per=100.00%, avg=30700.82, stdev=541.97, samples=68 iops
> : min= 7316, max= 8062, avg=7675.21, stdev=135.49, samples=68 cpu
> : usr=1.03%, sys=27.64%, ctx=1048635, majf=0, minf=5 IO depths :
> 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit :
> 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete :
> 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts:
> total=785920,262656,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0,
> window=0, percentile=100.00%, depth=64
>
> Run status group 0 (all jobs):
> READ: bw=89.6MiB/s (93.0MB/s), 89.6MiB/s-89.6MiB/s (93.0MB/s-93.0MB/s),
> io=3070MiB (3219MB), run=34256-34256msec WRITE: bw=29.0MiB/s (31.4MB/s),
> 29.0MiB/s-29.0MiB/s (31.4MB/s-31.4MB/s), io=1026MiB (1076MB),
> run=34256-34256msec
>
> virtiofs cache=none thread-pool-size=1
> test: (g=0): rw=randrw, bs=(R) 4096B-4096B, (W) 4096B-4096B, (T)
> 4096B-4096B, ioengine=psync, iodepth=64 fio-3.21
> Starting 1 process
>
> test: (groupid=0, jobs=1): err= 0: pid=738: Fri Sep 25 12:33:17 2020
> read: IOPS=23.7k, BW=92.4MiB/s (96.9MB/s)(3070MiB/33215msec)
> bw ( KiB/s): min=89808, max=111952, per=100.00%, avg=94762.30,
> stdev=4507.43, samples=66 iops : min=22452, max=27988, avg=23690.58,
> stdev=1126.86, samples=66 write: IOPS=7907, BW=30.9MiB/s
> (32.4MB/s)(1026MiB/33215msec); 0 zone resets bw ( KiB/s): min=29424,
> max=37112, per=100.00%, avg=31668.73, stdev=1558.69, samples=66 iops
> : min= 7356, max= 9278, avg=7917.18, stdev=389.67, samples=66 cpu
> : usr=0.43%, sys=29.07%, ctx=1048627, majf=0, minf=7 IO depths :
> 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit :
> 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete :
> 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts:
> total=785920,262656,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0,
> window=0, percentile=100.00%, depth=64
>
> Run status group 0 (all jobs):
> READ: bw=92.4MiB/s (96.9MB/s), 92.4MiB/s-92.4MiB/s (96.9MB/s-96.9MB/s),
> io=3070MiB (3219MB), run=33215-33215msec WRITE: bw=30.9MiB/s (32.4MB/s),
> 30.9MiB/s-30.9MiB/s (32.4MB/s-32.4MB/s), io=1026MiB (1076MB),
> run=33215-33215msec
>
> 9p ( mount -t 9p -o trans=virtio kernel /mnt
> -oversion=9p2000.L,cache=mmap,msize=1048576 ) test: (g=0): rw=randrw,
Bottleneck ------------------------------^
By increasing 'msize' you would encounter better 9P I/O results.
> bs=(R) 4096B-4096B, (W) 4096B-4096B, (T) 4096B-4096B, ioengine=psync,
> iodepth=64 fio-3.21
> Starting 1 process
>
> test: (groupid=0, jobs=1): err= 0: pid=736: Fri Sep 25 12:36:00 2020
> read: IOPS=16.2k, BW=63.5MiB/s (66.6MB/s)(3070MiB/48366msec)
> bw ( KiB/s): min=63426, max=82776, per=100.00%, avg=65054.28,
> stdev=2014.88, samples=96 iops : min=15856, max=20694, avg=16263.34,
> stdev=503.74, samples=96 write: IOPS=5430, BW=21.2MiB/s
> (22.2MB/s)(1026MiB/48366msec); 0 zone resets bw ( KiB/s): min=20916,
> max=27632, per=100.00%, avg=21740.64, stdev=735.73, samples=96 iops
> : min= 5229, max= 6908, avg=5434.99, stdev=183.95, samples=96 cpu
> : usr=1.60%, sys=14.28%, ctx=1049348, majf=0, minf=7 IO depths :
> 1=100.0%, 2=0.0%, 4=0.0%, 8=0.0%, 16=0.0%, 32=0.0%, >=64=0.0% submit :
> 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% complete :
> 0=0.0%, 4=100.0%, 8=0.0%, 16=0.0%, 32=0.0%, 64=0.0%, >=64=0.0% issued rwts:
> total=785920,262656,0,0 short=0,0,0,0 dropped=0,0,0,0 latency : target=0,
> window=0, percentile=100.00%, depth=64
>
> Run status group 0 (all jobs):
> READ: bw=63.5MiB/s (66.6MB/s), 63.5MiB/s-63.5MiB/s (66.6MB/s-66.6MB/s),
> io=3070MiB (3219MB), run=48366-48366msec WRITE: bw=21.2MiB/s (22.2MB/s),
> 21.2MiB/s-21.2MiB/s (22.2MB/s-22.2MB/s), io=1026MiB (1076MB),
> run=48366-48366msec
>
> So I'm sitll beating 9p; the thread-pool-size=1 seems to be great for
> read performance here.
>
> Dave
Best regards,
Christian Schoenebeck
next prev parent reply other threads:[~2020-09-25 13:11 UTC|newest]
Thread overview: 55+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-18 21:34 tools/virtiofs: Multi threading seems to hurt performance Vivek Goyal
2020-09-21 8:39 ` Stefan Hajnoczi
2020-09-21 13:39 ` Vivek Goyal
2020-09-21 16:57 ` Stefan Hajnoczi
2020-09-21 8:50 ` Dr. David Alan Gilbert
2020-09-21 13:35 ` Vivek Goyal
2020-09-21 14:08 ` Daniel P. Berrangé
2020-09-21 15:32 ` Dr. David Alan Gilbert
2020-09-22 10:25 ` Dr. David Alan Gilbert
2020-09-22 17:47 ` Vivek Goyal
2020-09-24 21:33 ` Venegas Munoz, Jose Carlos
2020-09-24 22:10 ` virtiofs vs 9p performance(Re: tools/virtiofs: Multi threading seems to hurt performance) Vivek Goyal
2020-09-25 8:06 ` virtiofs vs 9p performance Christian Schoenebeck
2020-09-25 13:13 ` Vivek Goyal
2020-09-25 15:47 ` Christian Schoenebeck
2021-02-19 16:08 ` Can not set high msize with virtio-9p (Was: Re: virtiofs vs 9p performance) Vivek Goyal
2021-02-19 17:33 ` Christian Schoenebeck
2021-02-19 19:01 ` Vivek Goyal
2021-02-20 15:38 ` Christian Schoenebeck
2021-02-22 12:18 ` Greg Kurz
2021-02-22 15:08 ` Christian Schoenebeck
2021-02-22 17:11 ` Greg Kurz
2021-02-23 13:39 ` Christian Schoenebeck
2021-02-23 14:07 ` Michael S. Tsirkin
2021-02-24 15:16 ` Christian Schoenebeck
2021-02-24 15:43 ` Dominique Martinet
2021-02-26 13:49 ` Christian Schoenebeck
2021-02-27 0:03 ` Dominique Martinet
2021-03-03 14:04 ` Christian Schoenebeck
2021-03-03 14:50 ` Dominique Martinet
2021-03-05 14:57 ` Christian Schoenebeck
2020-09-25 12:41 ` virtiofs vs 9p performance(Re: tools/virtiofs: Multi threading seems to hurt performance) Dr. David Alan Gilbert
2020-09-25 13:04 ` Christian Schoenebeck [this message]
2020-09-25 13:05 ` Dr. David Alan Gilbert
2020-09-25 16:05 ` Christian Schoenebeck
2020-09-25 16:33 ` Christian Schoenebeck
2020-09-25 18:51 ` Dr. David Alan Gilbert
2020-09-27 12:14 ` Christian Schoenebeck
2020-09-29 13:03 ` Vivek Goyal
2020-09-29 13:28 ` Christian Schoenebeck
2020-09-29 13:49 ` Vivek Goyal
2020-09-29 13:59 ` Christian Schoenebeck
2020-09-29 13:17 ` Vivek Goyal
2020-09-29 13:49 ` [Virtio-fs] " Miklos Szeredi
2020-09-29 14:01 ` Vivek Goyal
2020-09-29 14:54 ` Miklos Szeredi
2020-09-29 15:28 ` Vivek Goyal
2020-09-25 12:11 ` tools/virtiofs: Multi threading seems to hurt performance Dr. David Alan Gilbert
2020-09-25 13:11 ` Vivek Goyal
2020-09-21 20:16 ` Vivek Goyal
2020-09-22 11:09 ` Dr. David Alan Gilbert
2020-09-22 22:56 ` Vivek Goyal
2020-09-23 12:50 ` [Virtio-fs] " Chirantan Ekbote
2020-09-23 12:59 ` Vivek Goyal
2020-09-25 11:35 ` Dr. David Alan Gilbert
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