Messages in this thread |  | | Date | Sun, 3 Nov 1996 15:22:15 +0000 (GMT) | From | Gerard Roudier <> | Subject | Re: 53c7,8xx vs. 53c8xx? |
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On Sat, 2 Nov 1996 psychos@xeo.net wrote:
> Any suggestions for testing programs? If not, I'll run some real-world > tests with both drivers...
Thanks. Just do it.
As you can see at the results below, a ncr driver giving 15% better performance with my configuration cannot exist. I am interesting in your performance problem with the 53c8xx driver and I will be happy to track it and to fix it (if necessary).
Do all benckmarks you like to do and send me accurate informations about conditions of tests as I asked you in my previous mail.
Thanks in advance.
Gerard.
bonnie -s 200 ------------- -------Sequential Output-------- ---Sequential Input-- --Random-- -Per Char- --Block--- -Rewrite-- -Per Char- --Block--- --Seeks--- Machine MB K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU K/sec %CPU /sec %CPU XPW-4kfs 200 5991 96.5 7045 27.3 3233 27.1 5650 91.9 6791 26.7 97.7 3.7 XPW-1kfs 200 5022 93.6 6823 43.1 2976 34.2 5007 87.2 6404 31.2 53.2 3.1 S12-4kfs 200 3914 60.8 4036 16.0 1922 15.0 4045 65.4 4377 15.6 66.9 2.6 S12-1kfs 200 3715 68.3 3927 22.3 1761 19.2 4030 69.5 4405 20.3 43.4 2.9
hdparm -t /dev/sdb (Atlas wide) ------------------ /dev/sdb: Timing buffer-cache reads: 32 MB in 0.91 seconds =35.16 MB/sec Timing buffered disk reads: 16 MB in 2.35 seconds = 6.81 MB/sec Estimating raw driver speed: 16 MB in 1.90 seconds = 8.44 MB/sec
hdparm -t /dev/sda (IBM S12) ------------------ /dev/sda: Timing buffer-cache reads: 32 MB in 0.90 seconds =35.56 MB/sec Timing buffered disk reads: 16 MB in 3.69 seconds = 4.34 MB/sec Estimating raw driver speed: 16 MB in 3.24 seconds = 4.94 MB/sec
Configuration: -------------- P133 / Tyan Tomcat II / 512K plb / 32 MB EDO / NCR53C825 rev. 2 Quantum Atlas XP32150W / IBM S12 OEM Linux-2.1.7 / NCR53C8XX 1.14b (patch available at linux-scsi list) (NCR53C8XX 1.12c and 1.14a should give same results) - tagged commands enabled, up to 12 - 25 ns transfer period factor (i.e: 10 MHz synchronous data transfer) - disconnections allowed
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