Messages in this thread |  | | Date | Wed, 07 Nov 2001 12:29:06 -0800 | From | Andrew Morton <> | Subject | Re: Q:Howto benchmark preemptible kernel ? |
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szonyi calin wrote: > > Hi > I'm have a Cyrix 486/66 with 12Megs of ram. > I'm using preemptible patches from quite some time > now. > (2.4.10- 2.4.13) > I was using both Robert Love and Andrew Morton's > patch. > I would like to do some benhmarks but there are some > issues: > 1. The system is slow and has low memory so a big > benchmark is out of question (compiling the kernel > take 4 hours if i don't touch the console) > 2. The benchmark must be small and adequate (patching > the kernel to make a benchmark is out of discussion) > > Any ideas ? >
None of these patches make any significant difference to throughput of anything, really.
If you have a particular latency-sensitive application then that's the thing which you should be testing with.
There's a modified version of Mark Hahn's `realfeel' app in http://www.uow.edu.au/~andrewm/linux/amlat.tar.gz which I find to be a convenient way of quantitatively determining latencies. There are some grubby scripts in there which create graphical output too.
> P.S. (for Andrew ) Will there be a patch for 2.4.14 ?
J Sloan was the first to send me an updated patch this time. Thanks!
It needs a bit of maintenance at present - last time I gave it a good beating (a couple of weeks ago) there were a couple of ten millisecond blips.
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