freebsd question

[Giorgos Keramidas]

On Sat, Sep 09, 2000 at 12:16:13PM +0300, Giorgos Keramidas wrote:
> On Sat, Sep 09, 2000 at 09:47:01AM +0300, Nick Apostolakis wrote:
> > 
> > 
> > Hello all
> > 
> > mia erwtisi pou den einai sxetiki me to linux alla einai 
> > sxetiki me to freebsd.

Nomiza pos den einai kai apagoreumeno na milame gia otidhpote Unix edo
mesa.  Entaksei, xoris na to parakanoume kiolas, bebaia.

> Sto /usr/src/sys/i386/conf/LINT ena sxolio leei:
> 
> 	# If you see the "calcru: negative time of %ld usec for pid %d (%s)\n"
> 	# message you probably have some broken sw/hw which disables interrupts
> 	# for too long.  You can make the system more resistant to this by
> 	# choosing a high value for NTIMECOUNTER.  The default is 5, there
> 	# is no upper limit but more than a couple of hundred are not productive.
> 	# A better strategy may be to sysctl -w kern.timecounter.method=1
> 
> 	options         NTIMECOUNTER=20

By the way, ego auto to fainomeno me to microuptime to parathro entona
otan metafero megala arxeia pano apo to rl0 interface tou BSD, pou
shmainei oti mallon o rl0 driver pou basizetai pano ston miibus, kapou
xanei interrupts.  Den eimai sigouros an auto to kanei mono me tin
sugkekrimeni RealTek karta diktuou omws, h me oles tis RealTek, h akoma
xeirotera me oles tis PCI ethernet kartes pou basizontai ston miibus
kwdika.

Me sysctl -w kern.timecounter.method=0 kai NTIMECOUNTER=10 den janaeida
tetoia minimata.  Tha deiksei... perimenoume ta apotelesmata kai twn
test pou ginontai tora sto -CURRENT branch.

-- 
Giorgos Keramidas, <keramida at ceid.upatras.gr>
For my public pgp2 key: finger -l keramida at diogenis.ceid.upatras.gr

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