Date: Tue, 20 May 2008 08:32:14 -0600 From: Scott Long <scottl@samsco.org> To: Warren Guy <warren.guy@calorieking.com> Cc: freebsd-scsi@freebsd.org Subject: Re: Very poor performance from Dell/LSI Logic SAS 3000 series SATA/SAS RAID controller FreeBSD 6.3 Message-ID: <4832E0EE.3030402@samsco.org> In-Reply-To: <4832C397.3090004@calorieking.com> References: <4832C397.3090004@calorieking.com>
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Add the following to /boot/loader.conf: hw.mpt.enable_sata_wc=1 Scott Warren Guy wrote: > Hi, > > We have a few recently acquired Dell Poweredge SC440 machines in our office > running FreeBSD 6.3 that are experiencing very poor disk performance. The RAID > controller they are supplied with appears to be an "LSI Logic SAS 3000 Series". > There are two 250GB SATA disks in RAID 1 configuration. 6-7MB/s seems to be the > best I can get out of them. A Linux 2.6 machine with identical hardware and > disk/controller configuration exhibits no such performance impediments. > > Any information or pointers are greatly appreciated. > > bonnie++ output: > > Version 1.93c ------Sequential Output------ --Sequential Input- --Random- > Concurrency 1 -Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks-- > Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec %CP > eva.internal 300M 306 99 6722 1 5591 1 533 99 +++++ +++ 2359 37 > Latency 26715us 157ms 2193ms 25385us 808us 3852us > Version 1.93c ------Sequential Create------ --------Random Create-------- > eva.internal -Create-- --Read--- -Delete-- -Create-- --Read--- -Delete-- > files /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP > 16 4572 11 +++++ +++ +++++ +++ 3019 7 +++++ +++ 28367 40 > Latency 1277ms 23us 33us 1396ms 92us 317ms > 1.93c,1.93c,eva.internal,1,1211281869,300M,,306,99,6722,1,5591,1,533,99,+++++,+++,2359,37,16,,,,,4572,11,+++++,+++,+++++,+++,3019,7,+++++,+++,28367,40,26715us,157ms,2193ms,25385us,808us,3852us,1277ms,23us,33us,1396ms,92us,317ms > > and bonnie++ from the Linux 2.6 machine: > > Version 1.03 ------Sequential Output------ --Sequential Input- --Random- > -Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks-- > Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec %CP > webvms 300M 41255 78 114551 26 565402 88 52867 94 +++++ +++ +++++ +++ > ------Sequential Create------ --------Random Create-------- > -Create-- --Read--- -Delete-- -Create-- --Read--- -Delete-- > files /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP > 16 3571 95 +++++ +++ +++++ +++ 3543 92 +++++ +++ 10787 82 > webvms,300M,41255,78,114551,26,565402,88,52867,94,+++++,+++,+++++,+++,16,3571,95,+++++,+++,+++++,+++,3543,92,+++++,+++,10787,82 > > > > uname: > FreeBSD eva.internal 6.3-RELEASE-p1 FreeBSD 6.3-RELEASE-p1 #0: Wed Feb 13 > 02:56:56 UTC 2008 root@i386-builder.daemonology.net:/usr/obj/usr/src/sys/SMP > i386 > > from dmesg: > CPU: Intel(R) Xeon(R) CPU 3050 @ 2.13GHz (2128.01-MHz 686-class CPU) > real memory = 2145894400 (2046 MB) > avail memory = 2090598400 (1993 MB) > ... > mpt0: <LSILogic SAS/SATA Adapter> port 0xdc00-0xdcff mem > 0xefdec000-0xefdeffff,0xefdf0000-0xefdfffff irq 16 at device 8.0 on pci2 > mpt0: [GIANT-LOCKED] > mpt0: MPI Version=1.5.13.0 > mpt0: mpt_cam_event: 0x16 > mpt0: Unhandled Event Notify Frame. Event 0x16 (ACK not required). > mpt0: mpt_cam_event: 0x12 > mpt0: Unhandled Event Notify Frame. Event 0x12 (ACK not required). > mpt0: mpt_cam_event: 0x12 > mpt0: Unhandled Event Notify Frame. Event 0x12 (ACK not required). > mpt0: mpt_cam_event: 0x16 > mpt0: Unhandled Event Notify Frame. Event 0x16 (ACK not required). > ... > 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, Tagged Queueing Enabled > da0: 237464MB (486326272 512 byte sectors: 255H 63S/T 30272C) > > pciconf: > mpt0@pci2:8:0: class=0x010000 card=0x1f091028 chip=0x00541000 rev=0x01 hdr=0x00 > vendor = 'LSI Logic (Was: Symbios Logic, NCR)' > device = 'SAS 3000 series, 8-port with 1068 -StorPort' > class = mass storage > subclass = SCSI >
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