Messages in this thread | | | Date | Mon, 11 Feb 2002 12:55:28 +0100 | Subject | Re: Disk-I/O and % system (2.4.18-pre9) | From | Florian Hars <> |
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Heinz Diehl wrote: > Downgrade to 2.4.18-pre8 and use Michael Cohen's patch from > "ftp://ftp.kernel.org/pub/linux/kernel/people/mjc/linux-2.4/",
That doesn't help. I tried 2.4.16 with Debian modifications, said kernel patched to 2.4.18-pre9, stock 2.4.17, stock 2.4.18-pre9 and 2.4.18-pre8-mjc with preempt and lockbreak, and all behave alike.
On a plain ext2-filesystem on a primary partition I get (with -mjc):
During the sync the system is extremly sluggish, and once during my tests it froze completely (it did still return pings with a normal speed) so that I had to press reset.
The same operations on a slower computer running 2.2.20 are consideraby faster:
$ time tar -xzf linux-2.4.17.tar.gz; time sync
real 0m7.716s user 0m5.430s sys 0m2.110s
real 0m6.332s user 0m0.000s sys 0m0.120s
> Latency in stock 2.4.17/18-pre kernels is well known :\
this looks like more than a latency issue :-(.
Yours, Florian Hars. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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