From: NeilBrown <neilb@suse.de>
To: "Mathias Burén" <mathias.buren@gmail.com>
Cc: Linux-RAID <linux-raid@vger.kernel.org>
Subject: Re: SSSE6 / RAID6
Date: Wed, 23 May 2012 10:20:51 +1000 [thread overview]
Message-ID: <20120523102051.071bf55b@notabene.brown> (raw)
In-Reply-To: <CADNH=7HByQyQy=Bbn5AjO=nz8437QOCjGbkVhiUAKwp61_is0A@mail.gmail.com>
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On Tue, 22 May 2012 22:27:42 +0100 Mathias Burén <mathias.buren@gmail.com>
wrote:
> Hi list,
>
> I just compiled 3.4 for my little Atom box. Is there any way I can
> confirm if the RAID6 check is using SSSE6 instructions?
SSSE6 ? What is that? Some other name for SSSE3 ??
The SSSE3 RAID6 code was too late for 3.4. It is in -next and should appear
in 3.5-rc1.
NeilBrown
>
> $ zcat /proc/config.gz |grep -i -P '(raid|sss)'
> CONFIG_RAID_ATTRS=y
> CONFIG_MD_RAID0=m
> CONFIG_MD_RAID1=m
> CONFIG_MD_RAID10=m
> CONFIG_MD_RAID456=y
> # CONFIG_MULTICORE_RAID456 is not set
> CONFIG_DM_RAID=m
> CONFIG_ASYNC_RAID6_TEST=m
> CONFIG_ASYNC_RAID6_RECOV=y
> CONFIG_CRYPTO_SHA1_SSSE3=y
> CONFIG_RAID6_PQ=y
>
> $ cat /proc/cpuinfo |grep ssse
> flags : fpu vme de tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat
> clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx lm
> constant_tsc arch_perfmon pebs bts nopl aperfmperf pni dtes64 monitor
> ds_cpl tm2 ssse3 cx16 xtpr pdcm movbe lahf_lm dts
>
> $ cat /proc/mdstat
> Personalities : [raid6] [raid5] [raid4]
> md0 : active raid6 sdf1[5] sdh1[8] sdg1[0] sde1[7] sdc1[3] sdd1[4] sdb1[9]
> 9751756800 blocks super 1.2 level 6, 64k chunk, algorithm 2
> [7/7] [UUUUUUU]
> [>....................] check = 0.7% (15577860/1950351360)
> finish=1918.9min speed=16804K/sec
>
> unused devices: <none>
>
> $ ps aux |grep -i -P '(md|raid)'
> root 27 0.0 0.0 0 0 ? S< 21:52 0:00 [md]
> root 342 15.5 0.0 0 0 ? R 21:52 5:23 [md0_raid6]
> root 3937 65.2 0.0 0 0 ? R 22:13 9:11 [md0_resync]
>
> Thanks,
> Mathias
> --
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prev parent reply other threads:[~2012-05-23 0:20 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-05-22 21:27 SSSE6 / RAID6 Mathias Burén
2012-05-22 22:18 ` H. Peter Anvin
2012-05-22 23:37 ` Mathias Burén
2012-05-23 0:26 ` Jim Kukunas
2012-05-23 0:30 ` Mathias Burén
2012-05-23 0:20 ` NeilBrown [this message]
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