Date: Mon, 17 May 2010 17:28:45 -0400 From: dieterbsd@engineer.com To: freebsd-hardware@freebsd.org, freebsd-performance@freebsd.org Subject: SATA controller speed, JMB 363 vs. Sil 3132 Message-ID: <8CCC41F10E5080B-1B6C-354B@web-mmc-m09.sysops.aol.com>
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I ran a few quick&dirty performance tests comparing the JMB 363 and Sil=20
3132
SATA controllers. Both are PCIe-x1 cards costing under $US20. The same
pair of drives was used with both controllers. System was otherwise=20
idle.
Each test was run at least 3 times and the fastest results were used.
FreeBSD 8.0 amd64
Hitachi 2 TB 7200rpm drives
Sil 3132 siis(4) ada[0-3]
JMB 363 achi(4) ada[45]
read from 1 disk:
dd if=3D/dev/ada5 bs=3D1m count=3D1000 of=3D/dev/null
jmb363: 128414841 bytes/sec 7.2% faster=20
than sil 3132
sil3132: 119762153
read from both disks:
dd if=3D/dev/ada4 bs=3D1m count=3D1000 of=3D/dev/null & dd if=3D/dev/=
ada5=20
bs=3D1m count=3D1000 of=3D/dev/null
jmb363: 193589185 bytes/sec (total) 25.1% faster=20
than sil 3132
sil3132: 154734047
write to 1 disk:
dd of=3D/dev/ada4 bs=3D1m count=3D1000 if=3D/dev/zero
jmb363: 122418113 bytes/sec 20.1% faster=20
than sil 3132
sil3132: 101934754
write to both disks:
dd of=3D/dev/ada4 bs=3D1m count=3D1000 if=3D/dev/zero & dd of=3D/dev/=
ada5=20
bs=3D1m count=3D1000 if=3D/dev/zero
jmb363: 175237444 bytes/sec (total) 10.1% faster=20
than sil 3132
sil3132: 159158014
read from 1 disk & write to 1 disk:
dd if=3D/dev/ada4 bs=3D1m count=3D1000 of=3D/dev/null & dd of=3D/dev/=
ada5=20
bs=3D1m count=3D1000 if=3D/dev/zero
jmb363: 231763096 bytes/sec (total) 16.7% faster=20
than sil 3132
sil3132: 198604276
In all cases, the jmb363 outperformed the sil3132.
In all cases, using both disks at once results in less than the expected
performance.
The Sil 3132 can write to both drives faster than it can read from both
drives. I would expect reading to be at least as fast as writing.
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