I tried benchmarking this: Hardware: Thinkpad T61, Core 2 Duo T7100, 2 GB RAM Kernel version: trunk Kernel config: i386 686-flavour
I started the system in runlevel 1, ran a clean build of a kernel tree
configured as 'allnoconfig', and then timed 5 more clean builds ('make
clean && time make -j4').
With cgroups disabled at build time:
135.72user 12.59system 1:16.17elapsed 194%CPU (0avgtext+0avgdata
119248maxresident)k
135.93user 12.13system 1:15.65elapsed 195%CPU (0avgtext+0avgdata
119264maxresident)k
135.78user 12.17system 1:15.61elapsed 195%CPU (0avgtext+0avgdata
119248maxresident)k
135.52user 12.42system 1:16.03elapsed 194%CPU (0avgtext+0avgdata
119264maxresident)k
135.97user 12.04system 1:15.54elapsed 195%CPU (0avgtext+0avgdata
119264maxresident)k
With cgroups enabled at build time, disabled at init time:
136.11user 12.33system 1:15.82elapsed 195%CPU (0avgtext+0avgdata
119264maxresident)k
136.01user 12.35system 1:15.93elapsed 195%CPU (0avgtext+0avgdata
119248maxresident)k
135.66user 12.72system 1:16.09elapsed 195%CPU (0avgtext+0avgdata
119264maxresident)k
135.54user 12.82system 1:16.34elapsed 194%CPU (0avgtext+0avgdata
119248maxresident)k
135.95user 12.31system 1:15.93elapsed 195%CPU (0avgtext+0avgdata
119264maxresident)k
System time is about 2% higher on average, but I think the times are
variable enough that this may not be statistically significant. Could
someone who remembers some statistics tell me how many times I need to
repeat this to be able to tell?
Ben.
--
Ben Hutchings
You can't have everything. Where would you put it?
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