Hi all,
Using the last code submitted to CFS, I reran the Lustre echo
(diskless) tests using MXLND on MX-10G. The updated page is at:
https://mail.clusterfs.com/wikis/lustre/MX-10G
and it has a link to the original results.
As before, MXLND can nearly saturate the wire using a single client
for read and write. Using 3 clients slightly increases the read and
write performance, but there is not much room for an increase to
begin with. ;-)
The big change is the drop in CPU usage. MXLND uses a single thread
to handle completions and it can be set to block or poll on
completions. I tested blocking, polling 5,000 times before blocking
and polling 10,000 times before blocking. The blocking performance
for metadata was better than the polling results. For reading and
writing 1 MB messages, polling added 0.25% throughput but required
much more CPU.
Scott
--
Scott Atchley
Myricom Inc.
http://www.myri.com
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