Zapnout DMA pro CDROM
Milos Prudek
prudek na bvx.cz
Pátek Leden 16 14:44:36 CET 2004
> To je velmi prekvapive, osobne jsem se s tim jeste nesetkal.. pouzivam
> obvykle:
> -d1 (dma mi vsude vice ci mene vyrazne pomohlo)
> -c3 (32 bitove transfery na radic se synchronizacni sekvenci, po ksande
> samozrejme uz 16bit)
Mate pravdu, chce to spravnou kombinaci. Vase doporuceni se osvedcilo. I
hlucnost se zvysila na maximum :-)
Presne vysledky uvadim nize.
time -p cp -r /mnt/cdrom/100olymp/ .
real 48.63
user 0.11
sys 5.87
====
hdparm -c3 /dev/hdc; time -p cp -r /mnt/cdrom/100olymp/ .
/dev/hdc:
setting 32-bit IO_support flag to 3
IO_support = 3 (32-bit w/sync)
real 48.62
user 0.11
sys 5.57
====
hdparm -c1 /dev/hdc; time -p cp -r /mnt/cdrom/100olymp/ .
/dev/hdc:
setting 32-bit IO_support flag to 1
IO_support = 1 (32-bit)
real 59.81
user 0.11
sys 5.94
====
hdparm -c1 -d1 /dev/hdc; time -p cp -r /mnt/cdrom/100olymp/ .
/dev/hdc:
setting 32-bit IO_support flag to 1
setting using_dma to 1 (on)
IO_support = 1 (32-bit)
using_dma = 1 (on)
real 29.71
user 0.15
sys 5.95
====
hdparm -c3 -d1 /dev/hdc; time -p cp -r /mnt/cdrom/100olymp/ .
/dev/hdc:
setting 32-bit IO_support flag to 3
setting using_dma to 1 (on)
IO_support = 3 (32-bit w/sync)
using_dma = 1 (on)
real 26.00
user 0.16
sys 6.02
> Co vam na to reknou testy hdparmu (-Tt) ? A bonnie++ ? Jake je nastaveni
> ostatnich ide zarizeni? A jak je mate fyzicky zapojeny? Na zaklade
> vasich informaci me bohuzel pricina nenapada a vasemu zaveru se vzpiram
Harddisk je primary master, vypalovacka je secondary master.
--
Milos Prudek
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