* dbench throughput on xfs over hardware limit(6Gb/s)
@ 2020-10-13 14:09 Wang Yugui
2020-10-13 14:13 ` Wang Yugui
0 siblings, 1 reply; 2+ messages in thread
From: Wang Yugui @ 2020-10-13 14:09 UTC (permalink / raw)
To: linux-btrfs
Hi,
dbench throughput on xfs over hardware limit(6Gb/s=750MB/s).
Is this a bug or some feature of performance optimization?
Disk: TOSHIBA PX05SMQ040
This is a 12Gb/s SAS SSD disk, but connect to 6Gb/s SAS HBA,
so it works with 6Gb/s.
dbench -s -t 60 -D /xfs 32
#Throughput 884.406 MB/sec (sync open)
dbench -s -t 60 -D /xfs 1
#Throughput 149.172 MB/sec (sync open)
we test the same disk with ext4 filesystem,
the throughput is very close to, but less than the hardware limit.
dbench -s -t 60 -D /ext4 32
#Throughput 740.95 MB/sec (sync open)
dbench -s -t 60 -D /ext4 1
#Throughput 124.67 MB/sec (sync open)
linux kernel: 5.4.70, 5.9.0
Best Regards
王玉贵
2020/10/13
--------------------------------------
北京京垓科技有限公司
王玉贵 wangyugui@e16-tech.com
电话：+86-136-71123776
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: dbench throughput on xfs over hardware limit(6Gb/s)
2020-10-13 14:09 dbench throughput on xfs over hardware limit(6Gb/s) Wang Yugui
@ 2020-10-13 14:13 ` Wang Yugui
0 siblings, 0 replies; 2+ messages in thread
From: Wang Yugui @ 2020-10-13 14:13 UTC (permalink / raw)
To: linux-btrfs
Sorrry. This should be send to linux-xfs@vger.kernel.org.
> Hi,
>
> dbench throughput on xfs over hardware limit(6Gb/s=750MB/s).
>
> Is this a bug or some feature of performance optimization?
>
> Disk: TOSHIBA PX05SMQ040
> This is a 12Gb/s SAS SSD disk, but connect to 6Gb/s SAS HBA,
> so it works with 6Gb/s.
>
> dbench -s -t 60 -D /xfs 32
> #Throughput 884.406 MB/sec (sync open)
>
> dbench -s -t 60 -D /xfs 1
> #Throughput 149.172 MB/sec (sync open)
>
> we test the same disk with ext4 filesystem,
> the throughput is very close to, but less than the hardware limit.
>
> dbench -s -t 60 -D /ext4 32
> #Throughput 740.95 MB/sec (sync open)
>
> dbench -s -t 60 -D /ext4 1
> #Throughput 124.67 MB/sec (sync open)
>
> linux kernel: 5.4.70, 5.9.0
>
> Best Regards
> 王玉贵
> 2020/10/13
>
> --------------------------------------
> 北京京垓科技有限公司
> 王玉贵 wangyugui@e16-tech.com
> 电话：+86-136-71123776
--------------------------------------
北京京垓科技有限公司
王玉贵 wangyugui@e16-tech.com
电话：+86-136-71123776
^ permalink raw reply [flat|nested] 2+ messages in thread
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