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Re: gcc build / test times on multi-core hosts?

Andrew Haley wrote:


As a comparison point, I get

real    73m39.275s
user    113m19.549s
sys     15m26.010s

for the bootstrap: that's 1h14 elapsed time. That's on a "AMD
Athlon(tm) 64 X2 Dual Core Processor 4800+" (2.4 GHz) with make -j3.
That's 129min of CPU time in 74min of elapsed time, a pretty good
processor utilization ratio of 1.75 : 2.


Is that using the i686 or amd64 instruction set? If the latter, does it use 32 or 64 bit pointers?
How much RAM dos this machine have, and how fast is it?

Has anybody any figures what impact the choice of CAS 2 / CAS 2.5 / CAS3 NON-ECC / ECC
memory has on system performance when doing gcc builds / regression tests?


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