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changegroup: increase write buffer size to 128k...
changegroup: increase write buffer size to 128k By default, Python defers to the operating system for choosing the default buffer size on opened files. On my Linux machine, the default is 4k, which is really small for 2016. This patch bumps the write buffer size when writing changegroups/bundles to 128k. This matches the 128k read buffer we already use on revlogs. It's worth noting that this only impacts when writing to an explicit file (such as during `hg bundle`). Buffers when writing to bundle files via the repo vfs or to a temporary file are not impacted. When producing a none-v2 bundle file of the mozilla-unified repository, this change caused the number of write() system calls to drop from 952,449 to 29,788. After this change, the most frequent system calls are fstat(), read(), lseek(), and open(). There were 2,523,672 system calls after this patch (so a net decrease of ~950k is statistically significant). This change shows no performance change on my system. But I have a high-end system with a fast SSD. It is quite possible this change will have a significant impact on network file systems, where extra network round trips due to excessive I/O system calls could introduce significant latency.

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test-http.t
321 lines | 12.2 KiB | text/troff | Tads3Lexer
#require serve
$ hg init test
$ cd test
$ echo foo>foo
$ mkdir foo.d foo.d/bAr.hg.d foo.d/baR.d.hg
$ echo foo>foo.d/foo
$ echo bar>foo.d/bAr.hg.d/BaR
$ echo bar>foo.d/baR.d.hg/bAR
$ hg commit -A -m 1
adding foo
adding foo.d/bAr.hg.d/BaR
adding foo.d/baR.d.hg/bAR
adding foo.d/foo
$ hg serve -p $HGPORT -d --pid-file=../hg1.pid -E ../error.log
$ hg serve --config server.uncompressed=False -p $HGPORT1 -d --pid-file=../hg2.pid
Test server address cannot be reused
#if windows
$ hg serve -p $HGPORT1 2>&1
abort: cannot start server at ':$HGPORT1': * (glob)
[255]
#else
$ hg serve -p $HGPORT1 2>&1
abort: cannot start server at ':$HGPORT1': Address already in use
[255]
#endif
$ cd ..
$ cat hg1.pid hg2.pid >> $DAEMON_PIDS
clone via stream
$ hg clone --uncompressed http://localhost:$HGPORT/ copy 2>&1
streaming all changes
6 files to transfer, 606 bytes of data
transferred * bytes in * seconds (*/sec) (glob)
searching for changes
no changes found
updating to branch default
4 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ hg verify -R copy
checking changesets
checking manifests
crosschecking files in changesets and manifests
checking files
4 files, 1 changesets, 4 total revisions
try to clone via stream, should use pull instead
$ hg clone --uncompressed http://localhost:$HGPORT1/ copy2
requesting all changes
adding changesets
adding manifests
adding file changes
added 1 changesets with 4 changes to 4 files
updating to branch default
4 files updated, 0 files merged, 0 files removed, 0 files unresolved
clone via pull
$ hg clone http://localhost:$HGPORT1/ copy-pull
requesting all changes
adding changesets
adding manifests
adding file changes
added 1 changesets with 4 changes to 4 files
updating to branch default
4 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ hg verify -R copy-pull
checking changesets
checking manifests
crosschecking files in changesets and manifests
checking files
4 files, 1 changesets, 4 total revisions
$ cd test
$ echo bar > bar
$ hg commit -A -d '1 0' -m 2
adding bar
$ cd ..
clone over http with --update
$ hg clone http://localhost:$HGPORT1/ updated --update 0
requesting all changes
adding changesets
adding manifests
adding file changes
added 2 changesets with 5 changes to 5 files
updating to branch default
4 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ hg log -r . -R updated
changeset: 0:8b6053c928fe
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: 1
$ rm -rf updated
incoming via HTTP
$ hg clone http://localhost:$HGPORT1/ --rev 0 partial
adding changesets
adding manifests
adding file changes
added 1 changesets with 4 changes to 4 files
updating to branch default
4 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ cd partial
$ touch LOCAL
$ hg ci -qAm LOCAL
$ hg incoming http://localhost:$HGPORT1/ --template '{desc}\n'
comparing with http://localhost:$HGPORT1/
searching for changes
2
$ cd ..
pull
$ cd copy-pull
$ echo '[hooks]' >> .hg/hgrc
$ echo "changegroup = printenv.py changegroup" >> .hg/hgrc
$ hg pull
pulling from http://localhost:$HGPORT1/
searching for changes
adding changesets
adding manifests
adding file changes
added 1 changesets with 1 changes to 1 files
changegroup hook: HG_NODE=5fed3813f7f5e1824344fdc9cf8f63bb662c292d HG_NODE_LAST=5fed3813f7f5e1824344fdc9cf8f63bb662c292d HG_SOURCE=pull HG_TXNID=TXN:* HG_URL=http://localhost:$HGPORT1/ (glob)
(run 'hg update' to get a working copy)
$ cd ..
clone from invalid URL
$ hg clone http://localhost:$HGPORT/bad
abort: HTTP Error 404: Not Found
[255]
test http authentication
+ use the same server to test server side streaming preference
$ cd test
$ cat << EOT > userpass.py
> import base64
> from mercurial.hgweb import common
> def perform_authentication(hgweb, req, op):
> auth = req.env.get('HTTP_AUTHORIZATION')
> if not auth:
> raise common.ErrorResponse(common.HTTP_UNAUTHORIZED, 'who',
> [('WWW-Authenticate', 'Basic Realm="mercurial"')])
> if base64.b64decode(auth.split()[1]).split(':', 1) != ['user', 'pass']:
> raise common.ErrorResponse(common.HTTP_FORBIDDEN, 'no')
> def extsetup():
> common.permhooks.insert(0, perform_authentication)
> EOT
$ hg serve --config extensions.x=userpass.py -p $HGPORT2 -d --pid-file=pid \
> --config server.preferuncompressed=True \
> --config web.push_ssl=False --config web.allow_push=* -A ../access.log
$ cat pid >> $DAEMON_PIDS
$ cat << EOF > get_pass.py
> import getpass
> def newgetpass(arg):
> return "pass"
> getpass.getpass = newgetpass
> EOF
$ hg id http://localhost:$HGPORT2/
abort: http authorization required for http://localhost:$HGPORT2/
[255]
$ hg id http://localhost:$HGPORT2/
abort: http authorization required for http://localhost:$HGPORT2/
[255]
$ hg id --config ui.interactive=true --config extensions.getpass=get_pass.py http://user@localhost:$HGPORT2/
http authorization required for http://localhost:$HGPORT2/
realm: mercurial
user: user
password: 5fed3813f7f5
$ hg id http://user:pass@localhost:$HGPORT2/
5fed3813f7f5
$ echo '[auth]' >> .hg/hgrc
$ echo 'l.schemes=http' >> .hg/hgrc
$ echo 'l.prefix=lo' >> .hg/hgrc
$ echo 'l.username=user' >> .hg/hgrc
$ echo 'l.password=pass' >> .hg/hgrc
$ hg id http://localhost:$HGPORT2/
5fed3813f7f5
$ hg id http://localhost:$HGPORT2/
5fed3813f7f5
$ hg id http://user@localhost:$HGPORT2/
5fed3813f7f5
$ hg clone http://user:pass@localhost:$HGPORT2/ dest 2>&1
streaming all changes
7 files to transfer, 916 bytes of data
transferred * bytes in * seconds (*/sec) (glob)
searching for changes
no changes found
updating to branch default
5 files updated, 0 files merged, 0 files removed, 0 files unresolved
--pull should override server's preferuncompressed
$ hg clone --pull http://user:pass@localhost:$HGPORT2/ dest-pull 2>&1
requesting all changes
adding changesets
adding manifests
adding file changes
added 2 changesets with 5 changes to 5 files
updating to branch default
5 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ hg id http://user2@localhost:$HGPORT2/
abort: http authorization required for http://localhost:$HGPORT2/
[255]
$ hg id http://user:pass2@localhost:$HGPORT2/
abort: HTTP Error 403: no
[255]
$ hg -R dest tag -r tip top
$ hg -R dest push http://user:pass@localhost:$HGPORT2/
pushing to http://user:***@localhost:$HGPORT2/
searching for changes
remote: adding changesets
remote: adding manifests
remote: adding file changes
remote: added 1 changesets with 1 changes to 1 files
$ hg rollback -q
$ sed 's/.*] "/"/' < ../access.log
"GET /?cmd=capabilities HTTP/1.1" 200 -
"GET /?cmd=lookup HTTP/1.1" 200 - x-hgarg-1:key=tip
"GET /?cmd=listkeys HTTP/1.1" 401 - x-hgarg-1:namespace=namespaces
"GET /?cmd=capabilities HTTP/1.1" 200 -
"GET /?cmd=lookup HTTP/1.1" 200 - x-hgarg-1:key=tip
"GET /?cmd=listkeys HTTP/1.1" 401 - x-hgarg-1:namespace=namespaces
"GET /?cmd=capabilities HTTP/1.1" 200 -
"GET /?cmd=lookup HTTP/1.1" 200 - x-hgarg-1:key=tip
"GET /?cmd=listkeys HTTP/1.1" 401 - x-hgarg-1:namespace=namespaces
"GET /?cmd=listkeys HTTP/1.1" 200 - x-hgarg-1:namespace=namespaces
"GET /?cmd=listkeys HTTP/1.1" 200 - x-hgarg-1:namespace=bookmarks
"GET /?cmd=capabilities HTTP/1.1" 200 -
"GET /?cmd=lookup HTTP/1.1" 200 - x-hgarg-1:key=tip
"GET /?cmd=listkeys HTTP/1.1" 401 - x-hgarg-1:namespace=namespaces
"GET /?cmd=listkeys HTTP/1.1" 200 - x-hgarg-1:namespace=namespaces
"GET /?cmd=listkeys HTTP/1.1" 200 - x-hgarg-1:namespace=bookmarks
"GET /?cmd=capabilities HTTP/1.1" 200 -
"GET /?cmd=lookup HTTP/1.1" 200 - x-hgarg-1:key=tip
"GET /?cmd=listkeys HTTP/1.1" 401 - x-hgarg-1:namespace=namespaces
"GET /?cmd=listkeys HTTP/1.1" 200 - x-hgarg-1:namespace=namespaces
"GET /?cmd=listkeys HTTP/1.1" 200 - x-hgarg-1:namespace=bookmarks
"GET /?cmd=capabilities HTTP/1.1" 200 -
"GET /?cmd=lookup HTTP/1.1" 200 - x-hgarg-1:key=tip
"GET /?cmd=listkeys HTTP/1.1" 401 - x-hgarg-1:namespace=namespaces
"GET /?cmd=listkeys HTTP/1.1" 200 - x-hgarg-1:namespace=namespaces
"GET /?cmd=listkeys HTTP/1.1" 200 - x-hgarg-1:namespace=bookmarks
"GET /?cmd=capabilities HTTP/1.1" 200 -
"GET /?cmd=lookup HTTP/1.1" 200 - x-hgarg-1:key=tip
"GET /?cmd=listkeys HTTP/1.1" 401 - x-hgarg-1:namespace=namespaces
"GET /?cmd=listkeys HTTP/1.1" 200 - x-hgarg-1:namespace=namespaces
"GET /?cmd=listkeys HTTP/1.1" 200 - x-hgarg-1:namespace=bookmarks
"GET /?cmd=capabilities HTTP/1.1" 200 -
"GET /?cmd=branchmap HTTP/1.1" 200 -
"GET /?cmd=stream_out HTTP/1.1" 401 -
"GET /?cmd=stream_out HTTP/1.1" 200 -
"GET /?cmd=batch HTTP/1.1" 200 - x-hgarg-1:cmds=heads+%3Bknown+nodes%3D5fed3813f7f5e1824344fdc9cf8f63bb662c292d
"GET /?cmd=getbundle HTTP/1.1" 200 - x-hgarg-1:bundlecaps=HG20%2Cbundle2%3DHG20%250Achangegroup%253D01%252C02%250Adigests%253Dmd5%252Csha1%252Csha512%250Aerror%253Dabort%252Cunsupportedcontent%252Cpushraced%252Cpushkey%250Ahgtagsfnodes%250Alistkeys%250Apushkey%250Aremote-changegroup%253Dhttp%252Chttps&cg=0&common=5fed3813f7f5e1824344fdc9cf8f63bb662c292d&heads=5fed3813f7f5e1824344fdc9cf8f63bb662c292d&listkeys=phases%2Cbookmarks
"GET /?cmd=capabilities HTTP/1.1" 200 -
"GET /?cmd=batch HTTP/1.1" 200 - x-hgarg-1:cmds=heads+%3Bknown+nodes%3D
"GET /?cmd=getbundle HTTP/1.1" 401 - x-hgarg-1:bundlecaps=HG20%2Cbundle2%3DHG20%250Achangegroup%253D01%252C02%250Adigests%253Dmd5%252Csha1%252Csha512%250Aerror%253Dabort%252Cunsupportedcontent%252Cpushraced%252Cpushkey%250Ahgtagsfnodes%250Alistkeys%250Apushkey%250Aremote-changegroup%253Dhttp%252Chttps&cg=1&common=0000000000000000000000000000000000000000&heads=5fed3813f7f5e1824344fdc9cf8f63bb662c292d&listkeys=phases%2Cbookmarks
"GET /?cmd=getbundle HTTP/1.1" 200 - x-hgarg-1:bundlecaps=HG20%2Cbundle2%3DHG20%250Achangegroup%253D01%252C02%250Adigests%253Dmd5%252Csha1%252Csha512%250Aerror%253Dabort%252Cunsupportedcontent%252Cpushraced%252Cpushkey%250Ahgtagsfnodes%250Alistkeys%250Apushkey%250Aremote-changegroup%253Dhttp%252Chttps&cg=1&common=0000000000000000000000000000000000000000&heads=5fed3813f7f5e1824344fdc9cf8f63bb662c292d&listkeys=phases%2Cbookmarks
"GET /?cmd=capabilities HTTP/1.1" 200 -
"GET /?cmd=lookup HTTP/1.1" 200 - x-hgarg-1:key=tip
"GET /?cmd=listkeys HTTP/1.1" 401 - x-hgarg-1:namespace=namespaces
"GET /?cmd=capabilities HTTP/1.1" 200 -
"GET /?cmd=lookup HTTP/1.1" 200 - x-hgarg-1:key=tip
"GET /?cmd=listkeys HTTP/1.1" 401 - x-hgarg-1:namespace=namespaces
"GET /?cmd=listkeys HTTP/1.1" 403 - x-hgarg-1:namespace=namespaces
"GET /?cmd=capabilities HTTP/1.1" 200 -
"GET /?cmd=batch HTTP/1.1" 200 - x-hgarg-1:cmds=heads+%3Bknown+nodes%3D7f4e523d01f2cc3765ac8934da3d14db775ff872
"GET /?cmd=listkeys HTTP/1.1" 401 - x-hgarg-1:namespace=phases
"GET /?cmd=listkeys HTTP/1.1" 200 - x-hgarg-1:namespace=phases
"GET /?cmd=listkeys HTTP/1.1" 200 - x-hgarg-1:namespace=bookmarks
"GET /?cmd=branchmap HTTP/1.1" 200 -
"GET /?cmd=branchmap HTTP/1.1" 200 -
"GET /?cmd=listkeys HTTP/1.1" 200 - x-hgarg-1:namespace=bookmarks
"POST /?cmd=unbundle HTTP/1.1" 200 - x-hgarg-1:heads=666f726365* (glob)
"GET /?cmd=listkeys HTTP/1.1" 200 - x-hgarg-1:namespace=phases
$ cd ..
clone of serve with repo in root and unserved subrepo (issue2970)
$ hg --cwd test init sub
$ echo empty > test/sub/empty
$ hg --cwd test/sub add empty
$ hg --cwd test/sub commit -qm 'add empty'
$ hg --cwd test/sub tag -r 0 something
$ echo sub = sub > test/.hgsub
$ hg --cwd test add .hgsub
$ hg --cwd test commit -qm 'add subrepo'
$ hg clone http://localhost:$HGPORT noslash-clone
requesting all changes
adding changesets
adding manifests
adding file changes
added 3 changesets with 7 changes to 7 files
updating to branch default
abort: HTTP Error 404: Not Found
[255]
$ hg clone http://localhost:$HGPORT/ slash-clone
requesting all changes
adding changesets
adding manifests
adding file changes
added 3 changesets with 7 changes to 7 files
updating to branch default
abort: HTTP Error 404: Not Found
[255]
check error log
$ cat error.log