Mercurial > hg
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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 | f1c2552c2de7 |
children | ea70512b1ad6 |
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#!/bin/sh -e # # Build a Mercurial debian package from the current repo # # Tested on Jessie (stable as of original script authoring.) . $(dirname $0)/packagelib.sh BUILD=1 CLEANUP=1 DISTID=`(lsb_release -is 2> /dev/null | tr '[:upper:]' '[:lower:]') || echo debian` CODENAME=`lsb_release -cs 2> /dev/null || echo unknown` DEBFLAGS=-b while [ "$1" ]; do case "$1" in --distid ) shift DISTID="$1" shift ;; --codename ) shift CODENAME="$1" shift ;; --cleanup ) shift BUILD= ;; --build ) shift CLEANUP= ;; --source-only ) shift DEBFLAGS=-S ;; * ) echo "Invalid parameter $1!" 1>&2 exit 1 ;; esac done trap "if [ '$CLEANUP' ] ; then rm -r '$PWD/debian' ; fi" EXIT set -u if [ ! -d .hg ]; then echo 'You are not inside a Mercurial repository!' 1>&2 exit 1 fi gethgversion debver="$version" if [ -n "$type" ] ; then debver="$debver~$type" fi if [ -n "$distance" ] ; then debver="$debver+$distance-$CODENAME-$node" elif [ "$DEBFLAGS" = "-S" ] ; then # for building a ppa (--source-only) for a release (distance == 0), we need # to version the distroseries so that we can upload to launchpad debver="$debver~${CODENAME}1" fi control=debian/control changelog=debian/changelog if [ "$BUILD" ]; then if [ -d debian ] ; then echo "Error! debian control directory already exists!" exit 1 fi cp -r "$PWD"/contrib/debian debian sed -i.tmp "s/__VERSION__/$debver/" $changelog sed -i.tmp "s/__DATE__/$(date --rfc-2822)/" $changelog sed -i.tmp "s/__CODENAME__/$CODENAME/" $changelog rm $changelog.tmp # remove the node from the version string SRCFILE="mercurial_$(echo $debver | sed "s,-$node,,").orig.tar.gz" "$PWD/hg" archive $SRCFILE mv $SRCFILE .. debuild -us -uc -i -I $DEBFLAGS if [ $? != 0 ]; then echo 'debuild failed!' exit 1 fi fi if [ "$CLEANUP" ] ; then echo OUTPUTDIR=${OUTPUTDIR:=packages/$DISTID-$CODENAME} mkdir -p "$OUTPUTDIR" find ../mercurial*.deb ../mercurial_*.build ../mercurial_*.changes \ ../mercurial*.dsc ../mercurial*.gz \ -type f -newer $control -print0 2>/dev/null | \ xargs -Inarf -0 mv narf "$OUTPUTDIR" echo "Built packages for $debver:" find "$OUTPUTDIR" -type f -newer $control -name '*.deb' fi