Messages in this thread | | | From | Grant Coady <> | Subject | Odd IDE performance drop 2.4 vs 2.6? | Date | Mon, 13 Jun 2005 14:03:01 +1000 |
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Hi there,
A new 'old' box, with near 3:1 hdparm -Tt /dev/hda performance drop comparing 2.4.31 with 2.6.11.12. pII/266 on 440LX chipset. HDD set to udma2 (max for h/w) with manuf. utility. Single master on ribbon. CDROM on other ribbon. Two runs each via ssh login soon after boot:
Linux 2.4.31-si. root@silly:~# hdparm -tT /dev/hda
/dev/hda: Timing cached reads: 344 MB in 1.99 seconds = 172.86 MB/sec Timing buffered disk reads: 68 MB in 3.02 seconds = 22.52 MB/sec root@silly:~# hdparm -tT /dev/hda
/dev/hda: Timing cached reads: 356 MB in 2.00 seconds = 178.00 MB/sec Timing buffered disk reads: 68 MB in 3.04 seconds = 22.37 MB/sec root@silly:~#
Linux 2.6.11.12a. root@silly:~# hdparm -tT /dev/hda
/dev/hda: Timing cached reads: 340 MB in 2.01 seconds = 168.76 MB/sec Timing buffered disk reads: 26 MB in 3.02 seconds = 8.60 MB/sec root@silly:~# hdparm -tT /dev/hda
/dev/hda: Timing cached reads: 340 MB in 2.01 seconds = 169.26 MB/sec Timing buffered disk reads: 26 MB in 3.02 seconds = 8.61 MB/sec root@silly:~#
Hardware info, configs, etc at http://scatter.mine.nu/test/boxen/silly/ --Grant.
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