Messages in this thread | | | Date | Mon, 22 Oct 2001 02:23:57 +0800 (PHT) | From | Federico Sevilla III <> | Subject | Re: [PATCH] updated preempt-kernel |
| |
On 20 Oct 2001 at 03:27, Robert Love wrote: > A preemptible kernel. It lowers your latency.
I'm using 2.4.12-xfs with the preempt-kernel-rml-1 patch. Just this morning I noticed a minute or so of the system being in "freeze". There was no significant disk activity, my open windows were working (ICQ, IPTraf under wterm, Opera), but things like opening a new wterm would work but no prompt (bash) would come out, or "ps ax" on a system with stay there.
In the IPTraf window I saw a lot of domain lookups going back and forth. Since IPTraf does reverse name lookups I quit it to hopefully bring down the load. I'm running bind 9.1.3. After the freeze everything was 100% normal. I checked the syslog and found close to a hundred lines one after the other about named complaining of a lame server.
I am under the impression that it was bind hogging system resources, although I do not know how to look at historical data of memory usage and CPU usage for such a small time.
I am curious, what does the preempt patch do for such situations? I honestly don't know how the system would have felt otherwise (if I didn't have support for preemption). And it's not so easy to reproduce since I don't cause this myself.
Thanks for your input, and I'll give your second patch a shot as soon as I can. :)
--> Jijo
-- Federico Sevilla III :: jijo@leathercollection.ph Network Administrator :: The Leather Collection, Inc. GnuPG Key: <http://jijo.leathercollection.ph/jijo.gpg>
- 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/
| |