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Re: [PATCH] autodetect number of CPUs by default when using threads

From
Junio C Hamano <gitster@pobox.com>
Date
Dec 11, 2008, 22:25 UTC
Message-ID
<7v63lqcptn.fsf@gitster.siamese.dyndns.org>
In-Reply-To
<alpine.LFD.2.00.0812111524370.14328@xanadu.home>
Nicolas Pitre <nico@cam.org> writes:
Show 7 quoted lines
> I've spent quite a while wondering why repacking in one repo was faster 
> than repacking in a clone of that repo on the same machine.  So let's 
> display how many threads are actually used.
>
> We have comprehensive test in Makefile to determine if threads are 
> available, just to not use them by default.  I think that code has 
> proven itself for long enough now not to let people benefit from it.

Hmm, it does appear that distros compile with THREADED_DELTA_SEARCH turned on (I only checked Fedora and Debian), and I tend to agree with "long enough" but "proven itself" feels bit too strong a statement.

I think defaulting to autodetect is a good change. I do not like to add new output to stderr deep in -rc, though.

Can we park this in 'next' and move it to 'master' after 1.6.1?
Previous: Nicolas PitreNext: Nicolas Pitre
Message 2 of 11 in “autodetect number of CPUs by default when using threads”
  1. autodetect number of CPUs by default when using threadsNicolas Pitre, Dec 11, 2008
  2. Junio C HamanoDec 11, 2008
  3. Nicolas PitreDec 12, 2008
  4. Jeff KingDec 13, 2008
  5. Nicolas PitreDec 13, 2008
  6. pack-objects: don't use too many threads with few objectsNicolas Pitre, Dec 13, 2008
  7. Jeff KingDec 14, 2008
  8. Mike RalphsonDec 15, 2008
  9. Junio C HamanoDec 16, 2008
  10. Jeff KingDec 16, 2008
  11. Nicolas PitreDec 16, 2008

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