Messages in this thread | | | Date | Tue, 30 Oct 2012 09:18:07 +0100 | From | Ingo Molnar <> | Subject | Re: [GIT PULL 0/9] perf/core improvements and fixes |
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* Ingo Molnar <mingo@kernel.org> wrote:
> > * Arnaldo Carvalho de Melo <acme@infradead.org> wrote: > > > Em Fri, Oct 26, 2012 at 04:54:51PM +0200, Ingo Molnar escreveu: > > > * Arnaldo Carvalho de Melo <acme@infradead.org> wrote: > > > > . Makefile improvements from Namhyung Kim. > > > > > > These are really useful: there used to be a couple of > > > seconds of wait time at the beginning of every perf build - > > > these are now nicely explained with the various CHK entries. > > > > The optimal way, I guess, would be to have some cache file > > with the results of such feature tests, that would be created > > and then used till the build fails using its findings, which > > would trigger a new feature check round, followed by an > > automatic rebuild. > > > > That would be tricky because we would have to have an > > automated way of discovering if the build failed due to > > missing packages or if it failed due to some ordinary coding > > mistake. > > The feature tests aren't a big problem right now - but making > it *visible* is really useful. It also tells us which feature > test fails, etc.
Btw., there's another thing that would be nice in addition to simplifying the PERF-VERSION-GEN script: to be able to run the CHK tests in parallel, like the object file runes.
Right now the CHK tests are serialized and they take several seconds to build and run. A parallel make rule would reduce that to about a second I think.
Thanks,
Ingo
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