From mboxrd@z Thu Jan 1 00:00:00 1970 MIME-Version: 1.0 In-Reply-To: <2f9f914d7711bc393368ab53809b1c97@quanstro.net> References: <3e1162e60908291020t21a67c2m4ac3504868cb95b6@mail.gmail.com> <2f9f914d7711bc393368ab53809b1c97@quanstro.net> Date: Sat, 29 Aug 2009 10:39:53 -0700 Message-ID: <3e1162e60908291039x62d59ec2v5324b028cdcb9428@mail.gmail.com> From: David Leimbach To: Fans of the OS Plan 9 from Bell Labs <9fans@9fans.net> Content-Type: multipart/alternative; boundary=000e0cd485dadc6f5c04724b492b Subject: Re: [9fans] new 9atom.iso Topicbox-Message-UUID: 5bedfde4-ead5-11e9-9d60-3106f5b1d025 --000e0cd485dadc6f5c04724b492b Content-Type: text/plain; charset=ISO-8859-1 On Sat, Aug 29, 2009 at 10:25 AM, erik quanstrom wrote: > > Now that I've had a chance to really examine the system, I'm noticing a > > rather high interrupt count (1584), and I'm not exactly sure how to > figure > > out what's triggering them. > > i set HZ=1000. so that accounts for 1000 of them. i've also modified > /dev/irqalloc to count up the interrupts, so you should get a rough idea > of which irqs are responsible. i say rough because chaned interrupts > can confuse the matter a bit. > > > I did not install venti. I just configured my ip address for DHCP, and > I've > > got aux/timesync running (I think that was suspect before for some > reason). > > Stats shows interrupts as a solid rectangle of activity all the time. > > i get that too from stats. it's just tuned to HZ=100. the reason for the > increase is so that millisecond sleeps can work a bit better. on all the > systems i use, the overhead is not worth worring about. > Ah, I see so these are just normal interrupts of a healthy beating heart of a system. :-) I was a little concerned I had configured something incorrectly. Thanks for the explanation. > > - erik > > --000e0cd485dadc6f5c04724b492b Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable

On Sat, Aug 29, 2009 at 10:25 AM, erik q= uanstrom <qua= nstro@quanstro.net> wrote:
> Now that I've had a chance to really examine the= system, I'm noticing a
> rather high interrupt count (1584), and I'm not exactly sure how t= o figure
> out what's triggering them.

i set HZ=3D1000. =A0so that accounts for 1000 of them. =A0i've al= so modified
/dev/irqalloc to count up the interrupts, so you should get a rough idea of which irqs are responsible. =A0i say rough because chaned interrupts
can confuse the matter a bit.

> I did not install venti. =A0I just configured my ip address for DHCP, = and I've
> got aux/timesync running (I think that was suspect before for some rea= son).
> =A0Stats shows interrupts as a solid rectangle of activity all the tim= e.

i get that too from stats. =A0it's just tuned to HZ=3D100. =A0the= reason for the
increase is so that millisecond sleeps can work a bit better. =A0on all the=
systems i use, the overhead is not worth worring about.

Ah, I see s= o these are just normal interrupts of a healthy beating heart of a system. = =A0:-)

I was a little concerned I had configured s= omething incorrectly.

Thanks for the explanation.
=A0

- erik


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