kern/104624: Sound,
mouse and keyboard badly interrupted while I/O (disk, net)
Alexander Best
arundel at freebsd.org
Sun Dec 12 11:10:11 UTC 2010
The following reply was made to PR kern/104624; it has been noted by GNATS.
From: Alexander Best <arundel at freebsd.org>
To: bug-followup at freebsd.org
Cc:
Subject: Re: kern/104624: Sound, mouse and keyboard badly interrupted while I/O (disk, net)
Date: Sun, 12 Dec 2010 11:03:05 +0000
hi jaakko,
i can confirm that a similar issue exists for me running a very recent HEAD
snapshot on amd64. when the disk is performing heavy i/o (make -j8 buildworld
e.g.) sound starts stuttering and the system goes semi-responsive. mostly the
mouse input (usb) is lagging, but sometimes the cursor freezes in it's current
position for 10 seconds or so. in addition to that mouse input seems to get
corrupted and spontanious mouse clicks get generated. i talked to hps once and
he suspected that some mice require a certain polling rate. since under heavy
i/o the system seems unable to comply to that polling rate the mouse behavior
becomes whacky. i see this behavior both under ULE and 4BSD. this is the
output of vmstat -i on my system:
interrupt total rate
irq16: vgapci0++ 644115 6
irq18: uhci2 ehci0+ 130730 1
irq19: ath0 ahci0+ 24562200 259
irq20: hpet0 85278624 900
irq21: uhci1 2478835 26
irq256: ahci1 22677130 239
irq257: hdac0 5554487 58
Total 141326121 1492
this is my soundcard:
hdac0 at pci0:0:27:0: class=0x040300 card=0xa0021458 chip=0x293e8086 rev=0x02 hdr=0x00
vendor = 'Intel Corporation'
device = '82801IB/IR/IH (ICH9 Family) HD Audio Controller'
class = multimedia
subclass = HDA
cheers.
alex
--
a13x
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