Hello,
I have been running several benchmarks against 2.6.12-rc1 with differing
levels of CKRM config options on both x86 and ppc64. I finally (due to
the benchmarking system, not due to CKRM) was able to get consistent
results for the 5 key cases for CKRM on both x86 and ppc64:
2.6.12-rc1 stock kernel
2.6.12-rc1 + Gerrit's current stack of patches + CONFIG_CKRM=n
2.6.12-rc1 + Gerrit's current stack of patches + CONFIG_CKRM=y
2.6.12-rc1 + Gerrit's current stack of patches + Chandra's Memory RC
patches + CONFIG_CKRM=n
2.6.12-rc1 + Gerrit's current stack of patches + Chandra's Memory RC
patches + CONFIG_CKRM=y
The benchmarks I ran were (followed by the parameters passed in parens):
kernbench -- Workload generated by compiling kernels
(kernbench $num_cpus 5 -m 2)
tbench -- Simulates a Samba server _without_ filesystem calls
(tbench both 1)
dbench -- An FS benchmark that generates load patterns similar to those
of the commercial Netbench benchmark.
(dbench /tmp 4)
SPECjbb -- Simulation of a Java powered e-commerce website
(specjbb 1700 4 1 3 19 30 120)
SDET -- Workload created by parallel execution of common UNIX commands
(sdet "1 4 16 64")
ReAIM (x86 only) -- A multiuser benchmark that tests and measures the
performance of open system multiuser computers.
(reaim /tmp/diskdir workfile.short 1 10 2)
Contest (x86 only) -- Designed to test system responsiveness by running
kernel compilation under a number of different load conditions.
(no args)
The test machines were:
ppc64: 8-way pSeries (1.5 GHz Power4) with 64 GB RAM
x86: 4-way NUMA-Q (360 MHz PII) with 3GB RAM
I will be sending a total of 12 benchmark-related emails, one per
combination of architecture and benchmark.
The results are in a "raw" format, i.e. exactly what the benchmark
outputs; I figure the discussion of comparisons should occur on the
list.
I realize 2.6.12-rc1 is slightly dated, but it's the best I can do right
now. Hopefully, I can get updated results once I've re-run the tests
against 2.6.12-rc2.
Please ask questions/request more details, if you need them.
Thanks,
Nish
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