In the next messages I'll be sending you some new results using 16, 24,
and 32 cpus on an AlphaServer 8400 TruCluster.
This method of interconnect is looser than traditional SMP, but tighter
than traditional MPP. In the first message after this one, I'll send
you an excerpt from the "Customer Update" article on TruClusters.
I would suggest that you call the result something like
DEC 8400tc 5/350
in your table, but of course the actual abbreviation is up to you! I'm
sure you don't have space for
Digital AlphaServer 8400 5/350 with TruCluster and Memory Channel
The starting point for the benchmark was a recent stream_d.f from your
web site. Jonathan Harris of our High Performance Computing Group
modified the source code to use F90 and to add the needed directives.
I'm sure you'll want to diff the sources, which will be in one of the
following messages. I did a diff and his modifications sure seemed to
make sense to me.
The benchmark was compiled using the Digital Fortran 90 compiler V4 with
F90 -wsf <n> -fast -non_shared -O5 -tune ev4
The "-wsf" switch is a legacy of the days of workstation farms, but does
NOT indicate the cluster interconnect used. In fact, it uses the memory
channel (and was measurably faster because of it).
The timer was F90 system clock intrinsic
call system_clock(count = clock_count, count_rate = clock_rate)
second = (dble(clock_count) / dble(clock_rate))
Have a great Memorial Day weekend!
CSD Performance Group
Digital Equipment Corporation
This archive was generated by hypermail 2b29 : Tue Apr 18 2000 - 05:23:06 CDT