Re: [Myrinet] [Q] VIGM performance
Patrick Geoffray <[email protected]>
| Newsgroups | gmane.network.myrinet.general |
|---|---|
| Message-ID | <1031619306.444.48.camel@asterix> |
Hi Moon-Sang, On Sun, 2002-09-08 at 11:03, Moon-Sang Lee wrote: > Our cluster consists of P-III 850MHz dual-SMP nodes, and I'm testing > VIGM on Myrinet NIC M2L-PCI64B. According to our measurement using the > pingpong program in VIGM source tree, the latency shows 62 us for 4bytes > messages (not the round-trip latency). I think it's terrible. :( Which command line do you use to run the ping pong test ? > Could anybody tell me the true latency of VIGM? I'm afraid of having > a mistake to measure the latency. On my Dual PIII at 1 GHz, using PCI64C cards, I get 10 us for 4 Bytes. > While I have tried to find out the performance of VIGM over the internet, > it was not easy. Trying to find a ping pong code on the web was not easy either. I had to write my own, and it's not a perfect one. > p.s. the bandwidth data would also be appreciated. Peak bandwidth is roughly the same than MPICH-GM, aka 245 MB/s on L9 at 200 MHz. Patrick -- ---------------------------------------------------------- | Patrick Geoffray, Ph.D. [email protected] | Myricom, Inc. http://www.myri.com | Cell: 865-389-8852 685 Emory Valley Rd (B) | Phone: 626-821-5555 Oak Ridge, TN 37830 ----------------------------------------------------------