Date: Tue, 05 Jan 2010 18:46:06 +0300 From: Baginski Darren <kickbsd@ya.ru> To: freebsd-questions@freebsd.org Subject: LSILogic SAS/SATA Adapter performance under FreeBSD 8.0 and 7.2 ( 20!!! times slower then in RHEL ) Message-ID: <921262706366@webmail5.yandex.ru>
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Hi!
I have a Dell 1435 with folowing LSI config:
mpt0:vol0(mpt0:0:0): Settings ( Hot-Plug-Spares High-Priority-ReSync )
mpt0:vol0(mpt0:0:0): Using Spare Pool: 0
mpt0:vol0(mpt0:0:0): 2 Members:
(mpt0:1:32:0): Primary Online
(mpt0:1:1:0): Secondary Online
mpt0:vol0(mpt0:0:0): RAID-1 - Optimal
mpt0:vol0(mpt0:0:0): Status ( Enabled )
(mpt0:vol0:1): Physical (mpt0:0:1:0), Pass-thru (mpt0:1:0:0)
(mpt0:vol0:1): Online
(mpt0:vol0:0): Physical (mpt0:0:32:0), Pass-thru (mpt0:1:1:0)
(mpt0:vol0:0): Online
da0 at mpt0 bus 0 target 0 lun 0
da0: <Dell VIRTUAL DISK 1028> Fixed Direct Access SCSI-5 device
da0: 300.000MB/s transfers
da0: Command Queueing enabled
da0: 237464MB (486326272 512 byte sectors: 255H 63S/T 30272C)
Here is simple test
[root@FreeBSD tmp]# dd if=/dev/zero of=1g bs=1M count=1000 conv=sync
1000+0 records in
1000+0 records out
1048576000 bytes transferred in 196.386202 secs (5339357 bytes/sec)
[root@FreeBSD tmp]# time $(dd if=/dev/zero of=1g bs=1M count=1000 ; sync)
1000+0 records in
1000+0 records out
1048576000 bytes transferred in 198.980241 secs (5269749 bytes/sec)
real 3m24.876s
user 0m0.002s
sys 0m1.869s
So I've got _only_ 5Megabytes per second.
Now is the same server under RHEL5
[root@RHEL5 tmp]# dd if=/dev/zero of=1g bs=1M count=1000 conv=sync
1000+0 records in
1000+0 records out
1048576000 bytes (1.0 GB) copied, 5.34952 seconds, 196 MB/s
[root@RHEL5 tmp]# time $(dd if=/dev/zero of=1g bs=1M count=1000 ; sync)
1000+0 records in
1000+0 records out
1048576000 bytes (1.0 GB) copied, 4.70584 seconds, 223 MB/s
real 0m42.567s
user 0m0.007s
sys 0m6.038s
Both systems default install, no tweaking or custom kernels.
FreeBSD 8.0-release is on UFS, RHEL is on ext3.
I've tried same test on zfs/ufs FreeBSD 7.2 and 8.0 and got always about 6megabytes per sec.
Any ideas ?
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