reporting lost ticks

From: Antoine Martin
Date: Sat Feb 10 2007 - 22:34:38 EST


Andi Kleen wrote:
[Snip]
You run with report_lost_ticks and report the results to linux-kernel

Doing as I am told, here we go:
This is 100% reproducible, ie: just doing a big rsync between 2 disks and burning a DVD at the same time. Note: the system isn't very responsive when this happens, most notably: audio seems to jump every ~1second.
Hardware is an ASUS K8N-DL with a pair of Opteron 270s, 4GB PC3200, SATA disks, software raid.

time.c: Lost 6 timer tick(s)! rip __do_softirq+0x44/0xc0)
time.c: Lost 6 timer tick(s)! rip __do_softirq+0x44/0xc0)
time.c: Lost 6 timer tick(s)! rip __do_softirq+0x44/0xc0)
time.c: Lost 6 timer tick(s)! rip __do_softirq+0x44/0xc0)
time.c: Lost 6 timer tick(s)! rip __do_softirq+0x44/0xc0)
time.c: Lost 6 timer tick(s)! rip __do_softirq+0x44/0xc0)
time.c: Lost 6 timer tick(s)! rip __do_softirq+0x44/0xc0)
time.c: Lost 6 timer tick(s)! rip __do_softirq+0x44/0xc0)
time.c: Lost 6 timer tick(s)! rip __do_softirq+0x44/0xc0)
time.c: Lost 6 timer tick(s)! rip __do_softirq+0x44/0xc0)
time.c: Lost 6 timer tick(s)! rip __do_softirq+0x44/0xc0)
time.c: Lost 6 timer tick(s)! rip _spin_unlock_irq+0x10/0x40)

You can find a much longer version of the kernel output here:
http://194.145.196.85/ticks
http://194.145.196.85/ticks2
If you need anything else just let me know.

Antoine
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