I have a 3Ware 7500-4 card. I am experiencing some sluggishness with the RAID5 implementation. It has been running in a stable state for quite some time, however, I have always wondered if there was something I was not doing because it is very slow.
System Specs: pharos# dmesg | grep twe twe0: <3ware Storage Controller driver ver. 1.40.01.001 <http://1.40.01.001>> port 0xccd0-0xccdf mem 0xfe000000-0xfe7fffff,0xfe800400-0xfe80040f irq 2 at device 16.0 on pci0 twe0: 4 ports, Firmware FE7X 1.05.00.068 <http://1.05.00.068>, BIOS BE7X 1.08.00.048 <http://1.08.00.048> twed0: <Unit 0, RAID5, Normal> on twe0 twed0: 152636MB (312598784 sectors) Mounting root from ufs:/dev/twed0s1a uname -a FreeBSD 4.10-RELEASE FreeBSD 4.10-RELEASE #4: Sat Sep 3 15:53:44 EDT 2005 i386 3ware CLI> info List of controllers ------------------- Controller 0: 7500-4 (4) 3ware CLI> info c0 Controller: c0 ------------- Driver: 1.40.01.001 <http://1.40.01.001> Model: 7500-4 FW: FE7X 1.05.00.068 <http://1.05.00.068> BIOS: BE7X 1.08.00.048 <http://1.08.00.048> Monitor: ME7X 1.01.00.040 <http://1.01.00.040> Serial #: PCB: Rev3 PCHIP: 1.30-33 ACHIP: 3.20 # of units: 1 Unit 0: RAID 5 149.05 GB ( 312598784 blocks): OK # of ports: 4 Port 0: ST380020A 74.53 GB (156301488 blocks): OK(unit 0) Port 1: ST380020A 74.53 GB (156301488 blocks): OK(unit 0) Port 2: ST380020A 74.53 GB (156301488 blocks): OK(unit 0) 3ware CLI> info c0 u0 Unit /c0/u0 --------------------- Status: OK Unit Type: RAID 5 Stripe Size: 64k Size: 149.05 GB (312598784 blocks) # of subunits: 3 Subunit 0: CBOD: OK Physical Port: 0 Logical Port: 0 Subunit 1: CBOD: OK Physical Port: 1 Logical Port: 1 Subunit 2: CBOD: OK Physical Port: 2 Logical Port: 2 When I run systat -vmstat 1, I continually see twed0 running at 100% busy. In addition KB/t is between 1 and 10. tps is about 50. The dmesg says that the device is on irq2. The vmstat shows the interrupt as mux irq2 and is about 300 to 500 calls. As far as I know, I am using the most up to date firmware for the card. The computer itself is a dual 600 Mhz PIII (Dell). When I attempt to write many small files or remove a directory is when the slowness kicks in. Is this just something due to Raid5? Here is the output of Bonnie++: 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 pharos. 300M 53 94 16394 24 7163 14 121 95 35991 35 249.8 12 Latency 261ms 400ms 485ms 93237us 26252us 12216ms Version 1.93c ------Sequential Create------ --------Random Create-------- pharos -Create-- --Read--- -Delete-- -Create-- --Read--- -Delete-- files /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP /sec %CP 16 3835 45 28846 93 8255 85 4249 56 26604 84 4835 52 Latency 43557us 3422us 8544us 169ms 39158us 6936us _______________________________________________ freebsd-performance@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-performance To unsubscribe, send any mail to "[EMAIL PROTECTED]"
