Grant Grundler wrote:
[EMAIL PROTECTED]:/# dd if=/dev/shm/test of=/dev/null bs=4K 196608+0 records in 196608+0 records out 805306368 bytes transferred in 0.628504 seconds (1281306571 bytes/sec)
Yeah. Sounds like there is. Should be able to do several GB/s like that.
I suppose it's possibly an issue with the Memory controller too. ZX1 interleaves accesses across 4 DIMMs to get the memory bandwidth. Might check to make sure your box is "optimally" configured too.
[EMAIL PROTECTED] dd if=/dev/shm/test of=/dev/null bs=4K dd: opening `/dev/shm/test': No such file or directory
I just did dd if=/dev/zero of=test bs=1M count=768 I assume that the speed would be the same if there was non-zero data :)
I only have 2GB of ram.
Sorry - what do I need to do to create /dev/shm/test?
I should probably "cheat" and use 16KB block since that is the native page size on ia64.
"cheating" in that sense is good. 16KB blocks will probably increase the performance a lot. I was even thinking I would try to do that on my Xeon system. (I don't know if that's possible.)
Jeff _______________________________________________ openib-general mailing list [email protected] http://openib.org/mailman/listinfo/openib-general
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