Date: Wed, 21 Jan 2009 12:39:59 +0100 From: Ivan Voras <ivoras@freebsd.org> To: freebsd-current@freebsd.org Subject: Re: Binding timer interrupt to a cpu core Message-ID: <gl71in$tp5$1@ger.gmane.org> In-Reply-To: <433125.16474.qm@web63903.mail.re1.yahoo.com> References: <433125.16474.qm@web63903.mail.re1.yahoo.com>
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Barney Cordoba wrote:
> Is there a way in 7.1 to bind a timer software interrupt? I see cpuset =
for userland threads, but its not clear how to do it within the kernel.
Each CPU already has its own timer ticking:
3 users Load 0.00 0.00 0.00 Jan 21 12:36
Mem:KB REAL VIRTUAL VN PAGER SWAP
PAGER
Tot Share Tot Share Free in out in
out
Act 2152484 21140 2945416 46804 169412 count
All 2267140 25916 7497096 71436 pages
Proc: Interrup=
ts
r p d s w Csw Trp Sys Int Sof Flt 19 cow 3204 tot=
al
6 170 476 213 119 4 147 203 101 zfod
atkbd0 1
ozfod
ata0 irq14
0.1%Sys 0.1%Intr 0.0%User 0.0%Nice 99.8%Idle %ozfod 1
ciss0 uhci
| | | | | | | | | | | daefr
uhci4 22
118 prcfr 400
cpu0: time
51 dtbuf 173 totfr 3
bce0 256
Namei Name-cache Dir-cache 100000 desvn react 400
cpu5: time
Calls hits % hits % 83412 numvn pdwak 400
cpu7: time
33 28 85 1 3 24999 frevn pdpgs 400
cpu6: time
intrn 400
cpu3: time
Disks da0 pass0 478268 wire 400
cpu4: time
KB/t 18.00 0.00 2240976 act 400
cpu2: time
tps 2 0 1131116 inact 400
cpu1: time
MB/s 0.04 0.00 129228 cache
%busy 0 0 40184 free
Interrupts can be bound to CPUs but only by using APIs within the kernel
(there's no userland utility for it).
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