Filip Palian wrote:
Hi folks,
I've also encountered problems with write performnce on PE860, below are
some details.
I believe that a fix for this went into RELENG_6 this week.
Scott Long MFC'd the following fix at 2007-06-05 21:32:57.
Tom
Commit Message:
scottl 2007-06-03 23:13:05 UTC
FreeBSD src repository
Modified files:
sys/dev/mpt mpt.c mpt.h mpt_cam.c
Log:
mpt.c:
mpt.h:
Add support for reading extended configuration pages.
mpt_cam.c:
Do a top level topology scan on the SAS controller. If any
SATA device are discovered in this scan, send a passthrough FIS to set
the write cache. This is controllable through the following tunable at
boot:
hw.mpt.enable_sata_wc:
-1 = Do not configure, use the controller default
0 = Disable the write cache
1 = Enable the write cache
The default is -1. This tunable is just a hack and may be
deprecated in the future.
Turning on the write cache alleviates the write performance problems
with SATA that many people have observed. It is not recommend for those
who value data reliability! I cannot stress this strongly enough.
However, it is useful in certain circumstances, and it brings the
performence in line with what a generic SATA controller running under
the FreeBSD ATA driver provides (and the ATA driver has had the WC
enabled by default for years).
DELL PE860
==========
product:
========
chipset LSI SAS 1068B0
LSI SAS 1068-IR 06.50.00
mptbios 6.06.00.02 (2006.04.05)
disks:
======
2x ST3160812AS in RAID1
dmesg:
======
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-RELEASE #4: Wed May 30 10:34:00 CEST 2007
[EMAIL PROTECTED]:/usr/obj/usr/src/sys/GF-sn
Timecounter "i8254" frequency 1193182 Hz quality 0
CPU: Intel(R) Xeon(R) CPU X3210 @ 2.13GHz (2133.42-MHz
K8-class CPU)
Origin = "GenuineIntel" Id = 0x6f7 Stepping = 7
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=0xe3bd<SSE3,RSVD2,MON,DS_CPL,VMX,EST,TM2,<b9>,CX16,<b14>,<b15>>
AMD Features=0x20100800<SYSCALL,NX,LM>
AMD Features2=0x1<LAHF>
Cores per package: 4
real memory = 4831838208 (4608 MB)
avail memory = 4130754560 (3939 MB)
ACPI APIC Table: <DELL PE_SC3 >
...
mpt0: <LSILogic SAS/SATA Adapter> port 0xec00-0xecff mem
0xfe9fc000-0xfe9fffff,0xfe9e0000-0xfe9effff irq 16 at device 8.0 on pci2
mpt0: [GIANT-LOCKED]
mpt0: MPI Version=1.5.12.0
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).
mpt0: mpt_cam_event: 0xb
mpt0: Unhandled Event Notify Frame. Event 0xb (ACK not required).
da0 at mpt0 bus 0 target 0 lun 0
blogbench:
==========
Frequency = 10 secs
Scratch dir = [/var/tmp/]
Spawning 3 writers...
Spawning 1 rewriters...
Spawning 5 commenters...
Spawning 100 readers...
Benchmarking for 30 iterations.
The test will run during 5 minutes.
...
Final score for writes: 17
Final score for reads : 2026
Currently I'm during upgrading firmware and applaying upgrades from
Dell, if this will help I let you know.
Regards,
Filip Palian
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