Recent AMD760MPX chipset PCI measurements??
paullu at cs.ualberta.ca
Thu Feb 7 18:56:52 PST 2002
In late November/December, there was some exciting news about the
(then) forthcoming AMD 760 MPX chipset and the Tyan S2466 motherboard,
especially wrt 64-bit/66 MHz PCI performance with Myrinet.
Understandably, the details were under NDA and could not be made public.
Now, I find some results at:
DMA rate for 4096 Byte transfers (64bit / 66MHz bus)
1st: 8 pages from bogus sdma pg, 8 to bogus rdma
bus_read (send) = 315 MBytes/s
bus_write (recv) = 341 MBytes/s
which is a bit disappointing. I guess the numbers are not outright
horrible, but they are not nearly as good as the Serverworks-based boards
we have now (yes, this may be an apples-oranges thing :-)
Please, please tell me these numbers are not representative.
Since the chipset and boards are now released, perhaps the NDAs have
expired now and we hear about the original numbers??
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