For example, the highest performing single-core Opteron (HP Proliant
System)
gets a 14.0 in SPECint peak, and 12.7 base. The best single-core Xeon
result (a Bull system), is 17.4 peak and 16.8 base. The best dual-core
Opteron submission is 14.9 peak and 13.5 base. The best dual-core score for
Xeon is 18.1 and 17.5 respectively.
SPECint_rate is a throughput benchmark vs. raw integer computing
performance
(meaning, it is intended for multi-CPU systems). The best Opteron
dual-core score is 27.0 peak, 24.3 base. The best Xeon score is 30.8 and
29.3 respectively. With 4 cores (two dual-cores, since AMD doesn't have a
native quad-core result), Opteron (in a Sun system) gets 60.4 peak and 51.6
base, whereas Xeon has a 59.4 peak and 56.7 base.
Once again, I think these numbers are meaningless when compared to
mainframes.
From the SPECint site:
" The CPU2006 benchmarks (code + workload) have been designed to fit within
about 1GB of memory (when compiled with 32 bit pointers), i.e. within the
capabilities of systems that allow user applications to use 32 bits (4GB).
(SPEC is aware that some systems that are commonly described as "32-bit" may
provide a smaller number of bits to user applications, for example if one or
more bits are reserved to privileged code. SPEC is also aware that there are
many ways to spend profligate amounts of virtual memory. Therefore, although
32-bit systems are within the design center for the CPU2006 suites, SPEC
does not guarantee any particular memory size for the benchmarks, nor that
they will necessarily fit on all systems that are described as 32-bit.) "
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