Re: gettimeofday() goes backwards on FreeBSD 4.9

On November 28, 2003 04:19 pm, Tom Lane wrote:
> I said:
> > The failure is definitely quite repeatable on pgsql74.hub.org. I don't
> > see it on svr1.postgresql.org, though, which seems to be running almost
> > the same kernel.
>
> After looking more closely, I take that back: svr1 is failing too,
>

After 30+ minutes I'm now starting to see the same problems on my 5.2 testbed
as well. I'm going to fire this test up on my FreeBSD 3.x and 2.x boxen and
see if' it's there too. I can confirm that this not a SMP issue as that it's
happeing on both UP and SMP boxen for me.

> though not as often:
> > uname -a
>
> FreeBSD svr1.postgresql.org 4.9-PRERELEASE FreeBSD 4.9-PRERELEASE #4: Sat
> Sep 20 14:41:58 ADT 2003
> root(at)jupiter(dot)hub(dot)org:/usr/obj/usr/src/sys/kernel i386
>
> > ./a.out
>
> out of order tv_sec: 1070064182 410497, prev 1070064877 836691
> <----------- out of order tv_usec: 1070064182 410497, prev 1070064877
> 836691
> out of order tv_sec: 1070064877 920579, prev 1070064182 410497
> out of order tv_sec: 1070064901 126624, prev 1070064899 897160
> out of order tv_usec: 1070064901 126624, prev 1070064899 897160
> out of order tv_sec: 1070064907 306286, prev 1070064905 481423
> out of order tv_usec: 1070064907 306286, prev 1070064905 481423
> out of order tv_sec: 1070064218 861047, prev 1070064914 337241
> <----------- out of order tv_sec: 1070064914 570717, prev 1070064218 861047
> out of order tv_usec: 1070064914 570717, prev 1070064218 861047
> out of order tv_sec: 1070064241 411391, prev 1070064936 837585
> <----------- out of order tv_usec: 1070064241 411391, prev 1070064936
> 837585
> out of order tv_sec: 1070064937 497925, prev 1070064241 411391
> out of order tv_sec: 1070064251 811548, prev 1070064947 337739
> <----------- out of order tv_sec: 1070064947 508364, prev 1070064251 811548
> out of order tv_usec: 1070064947 508364, prev 1070064251 811548
>
> Maybe it's a 4.9-PRERELEASE bug?
>
> regards, tom lane

--
Darcy Buskermolen
Wavefire Technologies Corp.
ph: 250.717.0200
fx: 250.763.1759
http://www.wavefire.com