Date: Sat, 12 Dec 2009 10:44:04 +0100 From: Phillip Spring <gatinhodosseussonhos@hotmail.com> To: <ivoras@freebsd.org>, <freebsd-hackers@freebsd.org> Subject: RE: Request for information - timers, hz, interrupts Message-ID: <SNT102-W310DA3B1D3A4AB7CC1BFFBD38B0@phx.gbl> In-Reply-To: <hfb7ne$mi$1@ger.gmane.org> References: <hfb7ne$mi$1@ger.gmane.org>
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fact:
=20
I had to clean up a motherboard to boot Suse 10.2 kernel.
I think that dust and dead insects are for Windows 2003 only.
=20
dog -- now with the right sender name :)
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=20
> To: freebsd-hackers@freebsd.org
> From: ivoras@freebsd.org
> Date: Fri=2C 4 Dec 2009 15:52:39 +0100
> Subject: Request for information - timers=2C hz=2C interrupts
>=20
> For a long time=2C at least in the 6-stable timeframe=2C I was used to=20
> seeing timer interrupts going at the frequency of 2*HZ=2C e.g. this is=20
> from 6.4-RELEASE:
>=20
> kern.clockrate: { hz =3D 250=2C tick =3D 4000=2C profhz =3D 166=2C stathz=
=3D 33 }
> debug.psm.hz: 20
>=20
> cpu0: timer 6789885563 499
> cpu2: timer 6789885538 499
> cpu1: timer 6789885538 499
> cpu3: timer 6789885537 499
>=20
> Then sometime in 7.x this changed to 4*HZ=2C which continues in 8.x=2C e.=
g.=20
> from 7.2-RELEASE:
>=20
> kern.clockrate: { hz =3D 250=2C tick =3D 4000=2C profhz =3D 1000=2C stath=
z =3D 142 }
> kern.hz: 250
>=20
> cpu0: timer 1368329715 988
> cpu1: timer 1368324640 988
> cpu2: timer 1367642854 988
> cpu3: timer 1367642874 988
>=20
> I'm not very worried about it (though maybe laptop users might be=20
> because of potential power drainage) but would like to know the=20
> explanation behind it.
>=20
> Presumably it has something to do with profhz but what and why? There=20
> isn't an obvious correlation between profhz frequency in 6.x and HZ and=20
> in 7.x. and HZ.
>=20
> _______________________________________________
> freebsd-hackers@freebsd.org mailing list
> http://lists.freebsd.org/mailman/listinfo/freebsd-hackers
> To unsubscribe=2C send any mail to "freebsd-hackers-unsubscribe@freebsd.o=
rg"
=20
_________________________________________________________________
Windows 7: agora com conex=F5es autom=E1ticas de rede. Conhe=E7a.
http://www.microsoft.com/brasil/windows7/default.html?WT.mc_id=3D1539=
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