Messages in this thread | | | From | Samium Gromoff <> | Subject | Sound clicking under disk IO load resolved | Date | Tue, 19 Feb 2002 16:07:47 +0300 (MSK) |
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Recently i`ve finally had enough info to shed some light to the well known problem of sound clickage under disk IO load.
Facts collected so far were the next: 1. Sometimes heavy disk IO produces sound clicks 2. Heavy IO load doesnt necessarily produces clicks 3. Cpu load isnt the reason in no way. 4. disk DMA is enabled.
So the situation looked rather weird until recently.
What i have suddenly found out is that sometimes disk IO produces not the usual, and perfectly sane 100-200 interrupts/s, but mind-blowing 5000-8000 interrupts per sec, and i found some correlation of these with the VM load, which effectively was the swap io.
Comparing this value with 600irq/sec generated by isa SB, one can suppose that the isa sound card experiences inetrrupt starvation.
My further thinking was based on the assumption that no one sane IDE single-spindle device (and in my case is was the IBM Deskstar 60GXP) can not fulfill such request rate.
Info: linux-2.4.17-rmap12e, IBM Deskstar 60GXP, SB16 Vibra ISA p166, 40M ram, pIIx3 IDE
regards, Samium Gromoff - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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