From: "Toralf Förster" <toralf.foerster@gmx.de>
To: Linux Kernel <linux-kernel@vger.kernel.org>
Subject: Why are the MB/s of avx and raid6: twice as high for a docked ThinkPad than for an undocked ?
Date: Wed, 15 Jun 2016 23:46:34 +0200 [thread overview]
Message-ID: <5761CCBA.7050405@gmx.de> (raw)
This diff is reliable depending whether the T440s is docked (right) or not (left) :
Linux t44 4.5.7-hardened-r2 #1 SMP Wed Jun 15 23:39:10 CEST 2016 x86_64 Intel(R) Core(TM) i5-4300U CPU @ 1.90GHz GenuineIntel GNU/Linux
215c215
< avx : 10196.000 MB/sec
---
> avx : 23504.000 MB/sec
225,234c225,234
< raid6: sse2x1 gen() 2578 MB/s
< raid6: sse2x1 xor() 2007 MB/s
< raid6: sse2x2 gen() 3246 MB/s
< raid6: sse2x2 xor() 2203 MB/s
< raid6: sse2x4 gen() 3773 MB/s
< raid6: sse2x4 xor() 2640 MB/s
< raid6: avx2x1 gen() 5042 MB/s
< raid6: avx2x2 gen() 5812 MB/s
< raid6: avx2x4 gen() 6824 MB/s
< raid6: using algorithm avx2x4 gen() 6824 MB/s
---
> raid6: sse2x1 gen() 5816 MB/s
> raid6: sse2x1 xor() 4515 MB/s
> raid6: sse2x2 gen() 7261 MB/s
> raid6: sse2x2 xor() 4968 MB/s
> raid6: sse2x4 gen() 8511 MB/s
> raid6: sse2x4 xor() 5916 MB/s
> raid6: avx2x1 gen() 11378 MB/s
> raid6: avx2x2 gen() 13117 MB/s
> raid6: avx2x4 gen() 15398 MB/s
> raid6: using algorithm avx2x4 gen() 15398 MB/s
And why do the units differ (MB/sec versus MB/s) ?
--
Toralf
PGP: C4EACDDE 0076E94E, OTR: 420E74C8 30246EE7
next reply other threads:[~2016-06-15 21:46 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-15 21:46 Toralf Förster [this message]
2016-06-16 9:14 ` Why are the MB/s of avx and raid6: twice as high for a docked ThinkPad than for an undocked ? Henrique de Moraes Holschuh
2016-06-16 10:16 ` Toralf Förster
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