Messages in this thread |  | | Date | Thu, 10 May 2001 08:38:13 -0500 | From | "Andrew M. Theurer" <> | Subject | Re: Linux 2.4 Scalability, Samba, and Netbench |
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Bruce Allan wrote: > > Andrew Theurer wrote: > > I do have kernprof ACG and lockmeter for a 4P run. We saw no > > significant problems with lockmeter. csum_partial_copy_generic was the > > highest % in profile, at 4.34%. I'll see if we can get some space on > > http://lse.sourceforge.net to post the test data. > > The Netfinity system that you are using has two different supported GigE > adapters. I assume you are using one of these types - Netfinity Gigabit > Ethernet Adapter (19K4401) and the Netfinity Gigabit Ethernet SX Server > Adapter (06P3701); using the acenic.c and e1000.c drivers, respectively. > >From what I understand after initial perusal of the two drivers, the former > has receive checksumming support on the adapter itself while the latter, > the one you are using, does not support hardware checksumming (at least, it > is not enabled by the driver).
Bruce,
According to Intel's driver for Pro/1000, it supports checksum on Rx via module option "XsunRX=1". I have not tried this yet because we are waiting on our Gbps switch hardware. > Are you able to re-run your tests with GigE adapters that support > checksumming on the hardware instead of doing it in the kernel? If not, I > will be running similar tests in a very similar configuration (with the > 19K4401 adapters) in the near future and can share results if you'd like.
Yes, hopefully we will be running the new setup (64 clients, many Gbps adapters) in about 2-3 weeks. At that point I'd like to get some results for 8-way as well. It would definitely be a good idea to compare results.
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