17 messages in org.freebsd.freebsd-performancedecreasing interrupt CPU load| From | Sent On | Attachments |
|---|---|---|
| Oleg Gawriloff | Oct 20, 2004 5:10 am | |
| Eric Anderson | Oct 20, 2004 6:08 am | |
| Oleg Gawriloff | Oct 20, 2004 7:05 am | |
| Steven Hartland | Oct 20, 2004 8:14 am | |
| Uwe Doering | Oct 20, 2004 1:16 pm | |
| Jason Stone | Oct 20, 2004 1:34 pm | |
| Steven Hartland | Oct 20, 2004 1:37 pm | |
| Uwe Doering | Oct 20, 2004 2:08 pm | |
| Jason Stone | Oct 20, 2004 3:06 pm | |
| Lucas Holt | Oct 21, 2004 6:56 am | |
| Jason Stone | Oct 21, 2004 1:44 pm | |
| Oleg Gawriloff | Oct 22, 2004 5:31 am | |
| Steven Hartland | Oct 22, 2004 6:05 am | |
| Oleg Gawriloff | Oct 22, 2004 7:04 am | |
| Steven Hartland | Oct 22, 2004 8:56 am | |
| Steven Hartland | Oct 22, 2004 9:02 am | |
| Steven Hartland | Oct 22, 2004 9:31 am |
| Subject: | decreasing interrupt CPU load | |
|---|---|---|
| From: | Jason Stone (free...@dfmm.org) | |
| Date: | Oct 20, 2004 1:34:36 pm | |
| List: | org.freebsd.freebsd-performance | |
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Since you mentioned earlier that you run this on an SMP system, are you aware that device polling is available only for single CPU kernels, that is, not in SMP mode?
I read somewhere that there wasn't a specific reason for not allowing device polling and smp to be used at the same time, and that it was fairly safe to remove the #ifdef SMP/#error block in sys/kern/kern_poll.c and compile in both smp and device polling.
I haven't done this in a production environment, but I've done it on my smp desktop box, and it seems to work okay.
-Jason
-------------------------------------------------------------------------- Freud himself was a bit of a cold fish, and one cannot avoid the suspicion that he was insufficiently fondled when he was an infant. -- Ashley Montagu
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