Messages in this thread | | | Subject | Re: [PATCH 0/4] linux-2.6-block: deactivating pagecache for benchmarks | From | Dirk Henning Gerdes <> | Date | Thu, 01 Dec 2005 14:43:43 +0100 |
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Probably I should have mentioned, how my benchmark should look like:
I have written a little c-program opening several files for reading and writing. The dentry-cache would only play a role the first time, the files are opened. I'm not quite sure about the inode-cache. I check if the page has buffer, and mark them as not uptodate, too. So the buffer-cache is disabled, too.
I'm using ext2/ext3. I don't think, they use any additional caches.
But anyway: Could you explain your fake-umount idea a little more ?
Am Donnerstag, den 01.12.2005, 14:29 +0100 schrieb Arjan van de Ven: > On Thu, 2005-12-01 at 14:17 +0100, Dirk Henning Gerdes wrote: > > Hi Jens! > > > > For doing benchmarks on the I/O-Schedulers, I thought it would be very > > useful to disable the pagecache. > > > for benchmarks this is not enough though, you also need to clean the > inode and dentry caches, as well as any filesystem specific caches > (might be buffer cache)..... > at which point it's probably nicer to just fake a limited umount since > that has to do all of that anyway > > - > 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/ > -- Dirk Henning Gerdes Bönnersdyk 47 47803 Krefeld
Tel: 02151-755745 0174-7776640 Mail: mail@dirk-gerdes.de
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