On 2013-05-07 10:59, Michael Stahl wrote:
On 07/05/13 10:52, Noel Grandin wrote:
Hi
Any build experts feel like speeding up "make check".
I will definitely owe you a beverage of your choice :-)
The "subsequentcheck" part of "make check" spends most of it's life
executing one test at a time,
huh, really? it's clearly running very much in parallel here.
what does "grep PARALLELISM config_host.mk" say?
cd ..apparently there are 2 variables, one is CHECK_PARALLELISM and both have
the same value here.
[noel@hexrex libo]$ grep PARALLELISM config_host.mk
export CHECK_PARALLELISM?=6
export PARALLELISM?=6
Yes, it currently runs somewhat in parallel.
But if you use top or a system monitor during the "subsequenctcheck"
phase, you will note that there is very little system activity going on.
This is because the only kind of parallelism it currently has is that it
runs modules in parallel.
Since (a) the bulk of the tests are in very few modules and (b) the
tests are quite lightweight, it leads to very low system utilization.
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