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perf: add command to benchmark bundle reading...
perf: add command to benchmark bundle reading Upcoming commits will be refactoring bundle2 I/O code. This commit establishes a `hg perfbundleread` command that measures how long it takes to read a bundle using various mechanisms. As a baseline, here's output from an uncompressed bundle1 bundle of my Firefox repo (7,098,622,890 bytes): ! read(8k) ! wall 0.763481 comb 0.760000 user 0.160000 sys 0.600000 (best of 6) ! read(16k) ! wall 0.644512 comb 0.640000 user 0.110000 sys 0.530000 (best of 16) ! read(32k) ! wall 0.581172 comb 0.590000 user 0.060000 sys 0.530000 (best of 18) ! read(128k) ! wall 0.535183 comb 0.530000 user 0.010000 sys 0.520000 (best of 19) ! cg1 deltaiter() ! wall 0.873500 comb 0.880000 user 0.840000 sys 0.040000 (best of 12) ! cg1 getchunks() ! wall 6.283797 comb 6.270000 user 5.570000 sys 0.700000 (best of 3) ! cg1 read(8k) ! wall 1.097173 comb 1.100000 user 0.400000 sys 0.700000 (best of 10) ! cg1 read(16k) ! wall 0.810750 comb 0.800000 user 0.200000 sys 0.600000 (best of 13) ! cg1 read(32k) ! wall 0.671215 comb 0.670000 user 0.110000 sys 0.560000 (best of 15) ! cg1 read(128k) ! wall 0.597857 comb 0.600000 user 0.020000 sys 0.580000 (best of 15) And from an uncompressed bundle2 bundle (6,070,036,163 bytes): ! read(8k) ! wall 0.676997 comb 0.680000 user 0.160000 sys 0.520000 (best of 15) ! read(16k) ! wall 0.592706 comb 0.590000 user 0.080000 sys 0.510000 (best of 17) ! read(32k) ! wall 0.529395 comb 0.530000 user 0.050000 sys 0.480000 (best of 16) ! read(128k) ! wall 0.491270 comb 0.490000 user 0.010000 sys 0.480000 (best of 19) ! bundle2 forwardchunks() ! wall 2.997131 comb 2.990000 user 2.270000 sys 0.720000 (best of 4) ! bundle2 iterparts() ! wall 12.247197 comb 10.670000 user 8.170000 sys 2.500000 (best of 3) ! bundle2 part seek() ! wall 11.761675 comb 10.500000 user 8.240000 sys 2.260000 (best of 3) ! bundle2 part read(8k) ! wall 9.116163 comb 9.110000 user 8.240000 sys 0.870000 (best of 3) ! bundle2 part read(16k) ! wall 8.984362 comb 8.970000 user 8.110000 sys 0.860000 (best of 3) ! bundle2 part read(32k) ! wall 8.758364 comb 8.740000 user 7.860000 sys 0.880000 (best of 3) ! bundle2 part read(128k) ! wall 8.749040 comb 8.730000 user 7.830000 sys 0.900000 (best of 3) We already see some interesting data. Notably that bundle2 has significant overhead compared to bundle1. This matters for e.g. stream clone bundles, which can be applied at >1Gbps. Differential Revision: https://phab.mercurial-scm.org/D1385
Yuya Nishihara - - Load All Authors

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Makefile.python
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PYTHONVER=2.7.10
PYTHONNAME=python-
PREFIX=$(HOME)/bin/prefix-$(PYTHONNAME)$(PYTHONVER)
SYMLINKDIR=$(HOME)/bin
help:
@echo
@echo 'Make a custom installation of a Python version'
@echo
@echo 'Common make parameters:'
@echo ' PYTHONVER=... [$(PYTHONVER)]'
@echo ' PREFIX=... [$(PREFIX)]'
@echo ' SYMLINKDIR=... [$(SYMLINKDIR) creating $(PYTHONNAME)$(PYTHONVER)]'
@echo
@echo 'Common make targets:'
@echo ' python - install Python $$PYTHONVER in $$PREFIX'
@echo ' symlink - create a $$SYMLINKDIR/$(PYTHONNAME)$$PYTHONVER symlink'
@echo
@echo 'Example: create a temporary Python installation:'
@echo ' $$ make -f Makefile.python python PYTHONVER=${PYTHONVER} PREFIX=/tmp/p27'
@echo ' $$ /tmp/p27/bin/python -V'
@echo ' Python 2.7'
@echo
@echo 'Some external libraries are required for building Python: zlib bzip2 openssl.'
@echo 'Make sure their development packages are installed systemwide.'
# fedora: yum install zlib-devel bzip2-devel openssl-devel
# debian: apt-get install zlib1g-dev libbz2-dev libssl-dev
@echo
@echo 'To build a nice collection of interesting Python versions:'
@echo ' $$ for v in 2.{6{,.1,.2,.9},7{,.8,.10}}; do'
@echo ' make -f Makefile.python symlink PYTHONVER=$$v || break; done'
@echo 'To run a Mercurial test on all these Python versions:'
@echo ' $$ for py in `cd ~/bin && ls $(PYTHONNAME)2.*`; do'
@echo ' echo $$py; $$py run-tests.py test-http.t; echo; done'
@echo
export LANGUAGE=C
export LC_ALL=C
python: $(PREFIX)/bin/python docutils
printf 'import sys, zlib, bz2, docutils, ssl' | $(PREFIX)/bin/python
PYTHON_SRCDIR=Python-$(PYTHONVER)
PYTHON_SRCFILE=$(PYTHON_SRCDIR).tgz
$(PREFIX)/bin/python:
[ -f $(PYTHON_SRCFILE) ] || wget http://www.python.org/ftp/python/$(PYTHONVER)/$(PYTHON_SRCFILE) || curl -OL http://www.python.org/ftp/python/$(PYTHONVER)/$(PYTHON_SRCFILE) || [ -f $(PYTHON_SRCFILE) ]
rm -rf $(PYTHON_SRCDIR)
tar xf $(PYTHON_SRCFILE)
# Debian/Ubuntu disables SSLv2,3 the hard way, disable it on old Pythons too
-sed -i 's,self.*SSLv[23]_method(),0;//\0,g' $(PYTHON_SRCDIR)/Modules/_ssl.c
# Find multiarch system libraries on Ubuntu and disable fortify error when setting argv
LDFLAGS="-L/usr/lib/`dpkg-architecture -qDEB_HOST_MULTIARCH`"; \
BASECFLAGS=-U_FORTIFY_SOURCE; \
export LDFLAGS BASECFLAGS; \
cd $(PYTHON_SRCDIR) && ./configure --prefix=$(PREFIX) && make all SVNVERSION=pwd && make install
printf 'import sys, zlib, bz2, ssl' | $(PREFIX)/bin/python
rm -rf $(PYTHON_SRCDIR)
DOCUTILSVER=0.12
DOCUTILS_SRCDIR=docutils-$(DOCUTILSVER)
DOCUTILS_SRCFILE=$(DOCUTILS_SRCDIR).tar.gz
docutils: $(PREFIX)/bin/python
@$(PREFIX)/bin/python -c 'import docutils' || ( set -ex; \
[ -f $(DOCUTILS_SRCFILE) ] || wget http://downloads.sourceforge.net/project/docutils/docutils/$(DOCUTILSVER)/$(DOCUTILS_SRCFILE) || [ -f $(DOCUTILS_SRCFILE) ]; \
rm -rf $(DOCUTILS_SRCDIR); \
tar xf $(DOCUTILS_SRCFILE); \
cd $(DOCUTILS_SRCDIR) && $(PREFIX)/bin/python setup.py install --prefix=$(PREFIX); \
$(PREFIX)/bin/python -c 'import docutils'; \
rm -rf $(DOCUTILS_SRCDIR); )
symlink: python $(SYMLINKDIR)
ln -sf $(PREFIX)/bin/python $(SYMLINKDIR)/$(PYTHONNAME)$(PYTHONVER)
.PHONY: help python docutils symlink