Recent AMD760MPX chipset PCI measurements??
Patrick Geoffray
patrick at myri.com
Tue Feb 19 01:00:39 PST 2002
Hello Luc,
Luc Renambot wrote:
> Nice point. Do you know if it's also true on the AMD-760 MP Chipset ?
Nope, I have never had the curiosity to check that on a MP. Anyone on
the list with a 760 MP to run "/sbin/lspci -tv" ?
> We have built here a small cluster for parallel rendering (9 dual-athlon
> 1500+ and GeForce3, inter-connected with old Myrinet card for now).
> We were thinking of doing pixels transfer from the graphics card to
> Myrinet, since it's possible on the Nvidia cards to allocate data
> either on AGP or video memory. Do you have any ideas/pointers about
> that ?
That should be easy. The support has been added to GM-1.5.1: you just
need to mmap the PCI/AGP memory into user space, and then gm_register
the segment. You can then send/recv from/to this piece of memory. It
should even be possible to send/recv with MPICH-GM when the PCI space is
mapped in user space. Note that it's only supported on x86, as there is
holes in the address space on Alpha and IA64.
Patrick
----------------------------------------------------------
| Patrick Geoffray, Ph.D. patrick at myri.com
| Myricom, Inc. http://www.myri.com
| Cell: 865-389-8852 685 Emory Valley Rd (B)
| Phone: 865-425-0978 Oak Ridge, TN 37830
----------------------------------------------------------
More information about the Beowulf
mailing list