Mercurial > hg
view contrib/packagelib.sh @ 35599:af25237be091
perf: add threading capability to perfbdiff
Since we are releasing the GIL during diffing, it is interesting to see how a
thread pool would perform on diffing. We add a new `--threads` argument to
commands. Synchronizing the thread pool is a bit complex because we want to be
able to reuse it from one run to another.
On my computer (i7 with 4 cores + hyperthreading), I get the following data for
about 12000 revisions:
threads wall comb wall gain comb overhead
none 31.596715 31.59 0.00% 0.00%
1 31.621228 31.62 -0.08% 0.09%
2 16.406202 32.8 48.08% 3.83%
3 11.598334 34.76 63.29% 10.03%
4 9.205421 36.77 70.87% 16.40%
5 8.517604 42.51 73.04% 34.57%
6 7.94645 47.58 74.85% 50.62%
7 7.434972 51.92 76.47% 64.36%
8 7.070638 55.34 77.62% 75.18%
Compared to the feature disabled (threads=0), the overhead is negligible with
the threading code (threads=1), and the gain is already 48% with two threads.
author | Boris Feld <boris.feld@octobus.net> |
---|---|
date | Sun, 17 Dec 2017 04:31:27 +0100 |
parents | 16d9f0b3e134 |
children |
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# Extract version number into 4 parts, some of which may be empty: # # version: the numeric part of the most recent tag. Will always look like 1.3. # # type: if an rc build, "rc", otherwise empty # # distance: the distance from the nearest tag, or empty if built from a tag # # node: the node|short hg was built from, or empty if built from a tag gethgversion() { export HGRCPATH= export HGPLAIN= make cleanbutpackages make local PURE=--pure HG="$PWD/hg" "$HG" version > /dev/null || { echo 'abort: hg version failed!'; exit 1 ; } hgversion=`LANGUAGE=C "$HG" version | sed -ne 's/.*(version \(.*\))$/\1/p'` if echo $hgversion | grep + > /dev/null 2>&1 ; then tmp=`echo $hgversion | cut -d+ -f 2` hgversion=`echo $hgversion | cut -d+ -f 1` distance=`echo $tmp | cut -d- -f 1` node=`echo $tmp | cut -d- -f 2` else distance='' node='' fi if echo $hgversion | grep -- '-' > /dev/null 2>&1; then version=`echo $hgversion | cut -d- -f1` type=`echo $hgversion | cut -d- -f2` else version=$hgversion type='' fi }