Re: [myrinet] Re: Re: Fast Directed Writes
Patrick Geoffray <[email protected]>
| Newsgroups | gmane.network.myrinet.general |
|---|---|
| Organization | Myricom Inc |
| Message-ID | <[email protected]> |
Greg Lindahl wrote: > > On Wed, Sep 05, 2001 at 12:30:02PM -0700, Jarek Nieplocha wrote: > > > You imply that Myrinet provides in-order delivery of not only > > messages but also all the packets the message is composed of. Is it > > true in 100% of the cases? > > Good point. I'm not sure, and it's not easy to test because it doesn't > happen very often. Can someone who actually understands GM answer? On Intel, all of the packets composing a message are delivered in-order. It's not the case for Directed_send on Lanai4 when the message is not 64-bits aligned (and on Irix and Solaris using consitent DMA). On all architecture, GM guarantees that the last byte is written last. Patrick ----------------------------------------------------------- | Patrick Geoffray, Ph.D. [email protected] | | Myricom, Inc. http://www.myri.com | | Cell: 865-389-8852 325 N. Santa Anita Ave. | | Fax: 865-974-1950 Arcadia, CA 91006 | -----------------------------------------------------------