Date: Fri, 11 May 2007 14:51:44 +0100 From: Tom Judge <tom@tomjudge.com> To: Randy Schultz <schulra@earlham.edu> Cc: lydianconcepts@gmail.com, freebsd-performance@freebsd.org Subject: Re: possible issues with Dell/Perc5 raid Message-ID: <464474F0.3040306@tomjudge.com> In-Reply-To: <Pine.BSF.4.64.0705101545340.34925@tdream.lly.earlham.edu> References: <Pine.BSF.4.64.0705101545340.34925@tdream.lly.earlham.edu>
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Randy Schultz wrote: > Hi there, > > We just purchased a Dell 860 with these specifics: > - dual core pentium 915, 2.8 GHz, 800MHz FSB > - 2x512 MB 533 MHz DDR2 RAM > - Dell's SAS/SATA drive controller(which is actually an LSILogic) > - their 5IR PCI-Express internal RAID controller > - a pair of 250 GB SATA II's set up RAID 1 > > After installing 6.2-RELEASE on the system I noticed, while pulling the > ports > collection off the CDROM, that the speed to the drives started out just > fine > but long before the ports collection was installed the transfer rate was > down > to ~35kB/s. Huh. So I started paying closer attention. I installed a > couple > of ports and every time there was anything but miniscule data being > transferred to/from disk the transfer rate bottomed out. I installed the > blogbench port and it confirmed the I/O as tremendously sluggish. I've > attached the output of the blogbench runs. The first is from an old 700 > MHz > pc, Acer M25C mobo, with 1 IDE drive just for comparison. The second > data set > is the new Dell. I've also attached the output of dmesg. Everything looks > fine except for the mpt lines. Would those be telling of something > amiss or > are they innocuous barks? > > I understand that RAID 1 is not the fastest but I certainly expected it > to be > faster than it is, esp. with hw RAID. Are my expectations too high and > this > is normal? > > -- <SNIP> From the boot messages you have included below it seems that you have a Dell SAS-5i (Internal PCIe) controller and not a Perc/5[ie]. The SAS-5 known to have very poor performance (1Mb/s 100%busy) under certain loads (cvsup). I have CC'd the author of the mpt driver (Matthew Jacob) as he may be able to shed more light on the problem and time frame to resolution. Tom > > Copyright (c) 1992-2007 The FreeBSD Project. > Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994 > The Regents of the University of California. All rights reserved. > FreeBSD is a registered trademark of The FreeBSD Foundation. > FreeBSD 6.2-STABLE #0: Mon May 7 20:16:35 EDT 2007 > root@maxu.earlham.edu:/usr/obj/usr/src/sys/maxu.070507 > Timecounter "i8254" frequency 1193182 Hz quality 0 > CPU: Intel(R) Pentium(R) D CPU 2.80GHz (2800.11-MHz 686-class CPU) > Origin = "GenuineIntel" Id = 0xf64 Stepping = 4 > Features=0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36 > ,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE> > Features2=0xe49d<SSE3,RSVD2,MON,DS_CPL,EST,CNTX-ID,CX16,<b14>,<b15>> > AMD Features=0x20100000<NX,LM> > AMD Features2=0x1<LAHF> > Cores per package: 2 > real memory = 1073479680 (1023 MB) > avail memory = 1041326080 (993 MB) > ACPI APIC Table: <DELL PE_SC3 > > FreeBSD/SMP: Multiprocessor System Detected: 2 CPUs > cpu0 (BSP): APIC ID: 0 > cpu1 (AP): APIC ID: 1 <SNIP> > mpt0: <LSILogic SAS/SATA Adapter> port 0xec00-0xecff mem 0xfeafc000-0xfeafffff,0xfeae0000-0xf > eaeffff 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). <SNIP> > 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)
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