*Any* git clone fails with:
fatal: premature end of pack file, 106 bytes missing
fatal: index-pack failed
At first, I tried 1.8.0, and it failed. Then I tried to build 1.7.10.5
then, and it worked. Then I tried 1.7.12.2, but it fails the same way
as 1.8.0.
So I decided to git bisect.
b8a2486f1524947f232f657e9f2ebf44e3e7a243 is the first bad commit
``index-pack: support multithreaded delta resolving''
--------------------------------------------------------------------------------
b8a2486f1524947f232f657e9f2ebf44e3e7a243 is the first bad commit
commit b8a2486f1524947f232f657e9f2ebf44e3e7a243
Author: Nguyễn Thái Ngọc Duy <pclouds@xxxxxxxxx>
Date: Sun May 6 19:31:55 2012 +0700
index-pack: support multithreaded delta resolving
This puts delta resolving on each base on a separate thread, one base
cache per thread. Per-thread data is grouped in struct thread_local.
When running with nr_threads == 1, no pthreads calls are made. The
system essentially runs in non-thread mode.
An experiment on a Xeon 24 core machine with git.git shows that
performance does not increase proportional to the number of cores. So
by default, we use maximum 3 cores. Some numbers with --threads from 1
to 16:
1..4
real 0m8.003s 0m5.307s 0m4.321s 0m3.830s
user 0m7.720s 0m8.009s 0m8.133s 0m8.305s
sys 0m0.224s 0m0.372s 0m0.360s 0m0.360s
5..8
real 0m3.727s 0m3.604s 0m3.332s 0m3.369s
user 0m9.361s 0m9.817s 0m9.525s 0m9.769s
sys 0m0.584s 0m0.624s 0m0.540s 0m0.560s
9..12
real 0m3.036s 0m3.139s 0m3.177s 0m2.961s
user 0m8.977s 0m10.205s 0m9.737s 0m10.073s
sys 0m0.596s 0m0.680s 0m0.684s 0m0.680s
13..16
real 0m2.985s 0m2.894s 0m2.975s 0m2.971s
user 0m9.825s 0m10.573s 0m10.833s 0m11.361s
sys 0m0.788s 0m0.732s 0m0.904s 0m1.016s
On an Intel dual core and linux-2.6.git
1..4
real 2m37.789s 2m7.963s 2m0.920s 1m58.213s
user 2m28.415s 2m52.325s 2m50.176s 2m41.187s
sys 0m7.808s 0m11.181s 0m11.224s 0m10.731s
Thanks Ramsay Jones for troubleshooting and support on MinGW platform.
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@xxxxxxxxx>
Signed-off-by: Junio C Hamano <gitster@xxxxxxxxx>
:040000 040000 e5597fe041cd7985648030c8cf1cc35ea57786bb
6e64f3e76b350c04c9d0c435e0a53b89e0821339 M Documentation
:100644 100644 cf2c40b44f8383d002235400660d76ef7f6de33c
e41955ff955693ddc78722c14fff2a6e98663a46 M Makefile
:040000 040000 1e6b5ac5f11bf7ba3eff7b5be4410bad379feee6
85bc79414f00b7fc3698c069161ea10039641082 M builtin
:040000 040000 04916545d959c8af772cd3a2de5e6b470529bea1
325c8c748dd41d469135db84c7621d8225cc1cdd M t
$ git bisect log
git bisect start
# bad: [d8cf053dacb4f78920c112d10c7be21e4f5a5817] Git 1.7.12.2
git bisect bad d8cf053dacb4f78920c112d10c7be21e4f5a5817
# good: [785ee4960c3d334cbc2b17ab74d2cebdf1b4db64] Git 1.7.10.5
git bisect good 785ee4960c3d334cbc2b17ab74d2cebdf1b4db64
# bad: [d692d34653f74be6b16add3e993e957f33fe049b] Merge branch
'rs/git-blame-mapcar-mapc'
git bisect bad d692d34653f74be6b16add3e993e957f33fe049b
# good: [73ff8cf784b6ee447072fad6c06fd0eef0e9c9f6] Merge branch
'lp/diffstat-with-graph'
git bisect good 73ff8cf784b6ee447072fad6c06fd0eef0e9c9f6
# bad: [7903e66a3e10e98f29fc9524c13274376bae5303] Merge branch
'mh/test-keep-prove-cache'
git bisect bad 7903e66a3e10e98f29fc9524c13274376bae5303
# good: [499e7b31509cfbb59dcb2a046f8e2fd1a3e73d6f] Merge branch
'jc/install-no-hardlinks'
git bisect good 499e7b31509cfbb59dcb2a046f8e2fd1a3e73d6f
# bad: [2e464dd5b220d4d2d8a16d5c43efe7af3c9adda9] Merge branch
'rs/xdiff-lose-emit-func'
git bisect bad 2e464dd5b220d4d2d8a16d5c43efe7af3c9adda9
# good: [8fbe0db4fce68ed8239742b14e9d77d45201870b] Merge branch
'master' of git://github.com/git-l10n/git-po
git bisect good 8fbe0db4fce68ed8239742b14e9d77d45201870b
# bad: [2b26b65f9abc77c4af87626452005a73edda0c8f] git-svn: clarify
the referent of dcommit's optional argument
git bisect bad 2b26b65f9abc77c4af87626452005a73edda0c8f
# bad: [cc13431a49800a6a1d2b7ff0b94f67da0fecdbab] Merge branch
'nd/threaded-index-pack'
git bisect bad cc13431a49800a6a1d2b7ff0b94f67da0fecdbab
# bad: [b8a2486f1524947f232f657e9f2ebf44e3e7a243] index-pack:
support multithreaded delta resolving
git bisect bad b8a2486f1524947f232f657e9f2ebf44e3e7a243
# good: [5272f75587abb4cb396059ecbf1a6130bb2e69d3] index-pack:
restructure pack processing into three main functions
git bisect good 5272f75587abb4cb396059ecbf1a6130bb2e69d3
$ git bisect reset
Previous HEAD position was 5272f75... index-pack: restructure pack
processing into three main functions
HEAD is now at d8cf053... Git 1.7.12.2
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