Messages in this thread | | | From | (Måns Rullgård) | Subject | Re: 2.6 ide i/o performance | Date | Mon, 04 Aug 2003 11:04:42 +0200 |
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Vitalis Tiknius <vt@vt.fermentas.lt> writes:
> i simultaneously burned (audio mode, without scsi emulation) and ripped cd's > under 2.6.0-test2-mm2. devices are: > > ../ide/host0/bus1/target0/lun0/cd (Teac CD-W552E) > ../ide/host0/bus1/target1/lun0/cd (Teac DV-516E). > > mobo is Intel 875. software is k3b-0.9, cdrtools-2.01_alpha18, grip-3.1.1, and > cdparanoia-3.9.8 with all paranoia options on. > > when burning and ripping are performed separately, their speeds are approx. > 42x and 6.3x. when simultaneously, 12x and 1.6x with no options touched. > > although devices are on the same controller (my first controller is > SATA) and on the same bus, i'd rather expect linear and not almost > square-law throughput regression observed. are the things expected > to go this way, or there is some room for optimizations, etc.?
The first thing to do is to use separate cables for those devices, and see if it helps.
-- Måns Rullgård mru@users.sf.net
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