- Feb 01, 2018
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durin42 authored
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- Jan 31, 2018
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Wagner Bruna authored
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- Jan 28, 2018
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Matt Harbison authored
After f2aeff8a87b6, the fileset was evaluated to a set of files against the working directory, and then those files were applied against each revision. The result was nonsense. For example, `hg log -r 'file("set:exec()")'` on the Mercurial repo listed revision 0 because it has the `hg` script, which is currently +x. But that bit wasn't applied until revision 280 (which 'contains()' properly indicates). This technique was borrowed from checkstatus(), which services adds(), modifies(), and removes(), so it seems safe enough. The 'r:' case is explicitly assigned to wdirrev, freeing up rev=None to mean "re-evaluate at each revision". The distinction is important to avoid behavior changes with `hg log set:...` (test-largefiles-misc.t and test-fileset-generated.t drop current log output without this). I'm not sure what the right behavior for that is (1fd352aa08fc explicitly enabled this behavior for graphlog), but the day before the release isn't the time to experiment.
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- Feb 01, 2018
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Matt Harbison authored
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Anton Shestakov authored
Artful Aardvark was released on 2017-10-19 and will be supported until 2018-07.
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- Jan 31, 2018
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Boris Feld authored
Use the same pre-encoded normalization as bundlespecs for the stream v2 part requirements. As it touch the wire protocol, it needs to change before the release. This was spotted by Gregory Szorc. Differential Revision: https://phab.mercurial-scm.org/D1950
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- Jan 29, 2018
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Boris Feld authored
It will be reused for the formatting of the requirements of the stream v2 part requirement and later for the stream v2 requirements. Differential Revision: https://phab.mercurial-scm.org/D1949
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- Jan 30, 2018
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Boris Feld authored
The namespace used for the compatibility mode was missing a trailing 's'.
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- Jan 31, 2018
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Jun Wu authored
I got errors running tests with clang UBSAN [1] enabled. One of them is: ``` --- test-dirstate.t +++ test-dirstate.t.err @@ -85,9 +85,115 @@ $ echo "[extensions]" >> .hg/hgrc $ echo "dirstateex=../dirstateexception.py" >> .hg/hgrc $ hg up 0 - abort: simulated error while recording dirstateupdates - [255] + mercurial/cext/manifest.c:781:13: runtime error: load of value 190, which is not a valid value for type 'bool' + #0 0x7f668a8cf748 in lazymanifest_diff mercurial/cext/manifest.c:781 + #1 0x7f6692fc1dc4 in call_function Python-2.7.11/Python/ceval.c:4350 + ....... + SUMMARY: UndefinedBehaviorSanitizer: invalid-bool-load mercurial/cext/manifest.c:781:13 in + [1] $ hg log -r . -T '{rev}\n' 1 $ hg status - ? a ``` While the code is not technically wrong, but switching the condition would make clang UBSAN happy. So let's do it. The uninitialized memory could come from, for example, `lazymanifest_copy` allocates `self->maxlines` items but only writes the first `self->lines` items. [1]: https://clang.llvm.org/docs/UndefinedBehaviorSanitizer.html Test Plan: Run `test-dirstate.t` with UBSAN and it no longer reports the issue. Differential Revision: https://phab.mercurial-scm.org/D1948
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- Jan 26, 2018
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Martin von Zweigbergk authored
Before this patch, the docstring started with a newline, which led the summary line (shown in e.g. `hg help -c`) to be blank. Differential Revision: https://phab.mercurial-scm.org/D1943
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- Jan 29, 2018
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Gregory Szorc authored
Otherwise output can be non-deterministic if there are warnings for multiple sections. Differential Revision: https://phab.mercurial-scm.org/D1947
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- Jan 30, 2018
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Matt Harbison authored
The .hgignore file doesn't need to be tracked, nor does the git equivalent of this file. I'm still a little concerned about the effects of forgetting to commit this file. But the fact that conversions maintain the hashes if only the normal vs external storage changes, should make this less risky.
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- Jan 28, 2018
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Augie Fackler authored
Test Plan: ran all tests with and without --pure, everything passed on gcc112. Differential Revision: https://phab.mercurial-scm.org/D1946
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- Jan 26, 2018
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Boris Feld authored
This change was suggested by Gregory Szorc.
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Boris Feld authored
This change was suggested by Gregory Szorc.
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- Jan 24, 2018
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Boris Feld authored
Yuya Nishihara pointed out that it is safer.
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Boris Feld authored
This change was suggested by Gregory Szorc.
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- Jan 23, 2018
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Yuya Nishihara authored
Follows up 41ef02ba329b.
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- Jan 25, 2018
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Matt Harbison authored
This was useful in debugging, because I stupidly quoted it out of habit from the command line. This isn't a great example that clearly shows the problem, but I don't know how to improve it. The problem *is* obvious once a complex statement or a clearly bogus string is used.
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- Jan 24, 2018
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Matt Harbison authored
The only reasons I did this in the first place was because tracking externally seems like it would always be a mistake, and the eol extension does the same thing. Yuya and Jun thought it might be better to not do this[1], so I'll defer to them on this. If a problem with say, .hgtags or .hgeol does arise, it can be added back without breaking existing repos. [1] https://www.mercurial-scm.org/pipermail/mercurial-devel/2018-January/110371.html
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Matt Harbison authored
Per Yuya, for consistency with {lfspointer}. It might be slightly confusing for there to be {lfsoid} and {lfspointer.oid}. But preventing ambiguity seems more important, and the latter is controlled by the git-lfs spec.
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- Jan 22, 2018
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Matt Harbison authored
Per Martin von Zweigbergk's suggestion to keep this unambiguous, for when it is migrated to {files} and friends.
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durin42 authored
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durin42 authored
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Augie Fackler authored
# no-check-commit because it's a clean merge
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- Jan 21, 2018
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Gregory Szorc authored
Bundle2 payload parts are framed chunks. Esentially, we obtain data in equal size chunks of size `preferedchunksize` and emit those to a generator. That generator is fed into a compressor (which can be the no-op compressor, which just re-emits the generator). And the output from the compressor likely goes to a file descriptor or socket. What this means is that small chunk sizes create more Python objects and Python function calls than larger chunk sizes. And as we know, Python object and function call overhead in performance sensitive code matters (at least with CPython). This commit increases the bundle2 part payload chunk size from 4k to 32k. Practically speaking, this means that the chunks we feed into a compressor (implemented in C code) or feed directly into a file handle or socket write() are larger. It's possible the chunks might be larger than what the receiver can handle in one logical operation. But at that point, we're in C code, which is much more efficient at dealing with splitting up the chunk and making multiple function calls than Python is. A downside to larger chunks is that the receiver has to wait for that much data to arrive (either raw or from a decompressor) before it can process the chunk. But 32kb still feels like a small buffer to have to wait for. And in many cases, the client will convert from 8 read(4096) to 1 read(32768). That's happening in Python land. So we cut down on the number of Python objects and function calls, making the client faster as well. I don't think there are any significant concerns to increasing the payload chunk size to 32kb. The impact of this change on performance significant. Using `curl` to obtain a stream clone bundle2 payload from a server on localhost serving the mozilla-unified repository: before: 20.78 user; 7.71 system; 80.5 MB/s after: 13.90 user; 3.51 system; 132 MB/s legacy: 9.72 user; 8.16 system; 132 MB/s bundle2 stream clone generation is still more resource intensive than legacy stream clone (that's likely because of the use of a util.chunkbuffer). But the throughput is the same. We might be in territory we're this is effectively a benchmark of the networking stack or Python's syscall throughput. From the client perspective, `hg clone -U --stream`: before: 33.50 user; 7.95 system; 53.3 MB/s after: 22.82 user; 7.33 system; 72.7 MB/s legacy: 29.96 user; 7.94 system; 58.0 MB/s And for `hg clone --stream` with a working directory update of ~230k files: after: 119.55 user; 26.47 system; 0:57.08 wall legacy: 126.98 user; 26.94 system; 1:05.56 wall So, it appears that bundle2's stream clone is now definitively faster than legacy stream clone! Differential Revision: https://phab.mercurial-scm.org/D1932
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- Jan 22, 2018
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Gregory Szorc authored
Previously, enabling of stream clone over bundle2 was a server-side only change. And clients would only advertise bundle2 support for stream clones if an experimental config option was set. This situation wasn't forward compatible because in the future (when the feature is enabled on servers by default), an old client would send a request to the server but it wouldn't send its own bundle2 capability support for stream parts. Servers would have to infer that clients not sending this capability were old Mercurial clients that only sent the capability if the feature was explicitly enabled. Implicit and inferred behavior makes implementing servers hard. It's much better to be explicit about client features. We should either make the config option for bundle2 stream clones disable the feature client-side as well (so a server doesn't see a request from a client not advertising stream support). Or we should always advertise stream support if a client is willing to accept stream parts. Since I anticipating stabilizing stream clone support in bundle2 quickly, I think it's safe to always advertise client support in the bundle2 capabilities. So this commit changes things to do that. Because capabilities now vary between client and server, we had to create variations of the variable substitutions for those strings. Differential Revision: https://phab.mercurial-scm.org/D1931
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Gregory Szorc authored
Previously, bundle2 stream support would send out data even though the streaming clone feature was disabled. This commit changes the part handler to respect the server config. Differential Revision: https://phab.mercurial-scm.org/D1930
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Gregory Szorc authored
The server.uncompressed config option can be used to disable streaming clones. While the top-level capability to advertise streaming clone support isn't advertised when this option is set, we were still sending the bundle2-level capabilities advertising support for stream parts. It makes sense to not advertise that support when streaming clones are globally disabled. If the structure of the new code seems a bit odd, it is because we'll have to further tweak the behavior in commit(s) ahead. Differential Revision: https://phab.mercurial-scm.org/D1929
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Gregory Szorc authored
We already have testing for server.uncompressed in test-http*.t. However, it doesn't cover the new bundle2 use case. And, we don't have comprehensive testing of advertised capabilities. We add tests to test-clone-uncompressed.t that demonstrate behavior for both legacy and bundle2 configurations. If you look closely, the bundle2 capabilities are advertising stream support when it isn't enabled. That's a bug. In addition, while the client is smart enough to not request a stream clone when the server doesn't have the feature enabled, the getbundle wire protocol command is still sending stream clone data. This doesn't match the behavior of the legacy stream_out wire protocol command. That's also a bug. Tests have been added. While I was here, I also changed how the PID is recorded in $DAEMON_PIDS. If we kill a process, the PID formerly in $DAEMON_PIDS no longer exists. So we should replace that file instead of appending to it. Differential Revision: https://phab.mercurial-scm.org/D1928
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Gregory Szorc authored
I don't like having version numbers as part parameters. It means that parts can theoretically vary wildly in their generation and processing semantics. I think that a named part should have consistent behavior over time. In other words, if you need to introduce new functionality or behavior, that should be expressed by inventing a new bundle2 part, not adding functionality to an existing part. This commit applies this advice to the just-introduced stream clone via bundle2 feature. The "version" part parameter is removed. The name of the bundle2 part is now "stream2" instead of "stream" with "version=v2". Differential Revision: https://phab.mercurial-scm.org/D1927
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Gregory Szorc authored
Stream clones don't compress well. And compression undermines a point of stream clones which is to trade significant CPU reductions by increasing size. Building upon our introduction of metadata to communicate bundle information back to callers of exchange.getbundlechunks(), we add an attribute to the bundler that communicates whether the bundle is best left uncompressed. We return this attribute as part of the bundle metadata. And the wire protocol honors it when determining whether to compress the wire protocol response. The added test demonstrates that the raw result from the wire protocol is not compressed. It also demonstrates that the server will serve stream responses when the feature isn't enabled. We'll address that in another commit. The effect of this change is that server-side CPU usage for bundle2 stream clones is significantly reduced by removing zstd compression. For the mozilla-unified repository: before: 37.69 user 8.01 system after: 27.38 user 7.34 system Assuming things are CPU bound, that ~10s reduction would translate to faster clones on the client. zstd can decompress at >1 GB/s. So the overhead from decompression on the client is small in the grand scheme of things. But if zlib compression were being used, the overhead would be much greater. Differential Revision: https://phab.mercurial-scm.org/D1926
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Gregory Szorc authored
It looks like Git 2.16 removed the "..." from some strings. Glob over those characters in the test output. Differential Revision: https://phab.mercurial-scm.org/D1935
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- Jan 20, 2018
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Gregory Szorc authored
We generally want a mechanism to pass information about the generated bundle back to callers (in addition to the byte stream). Ideally we would return a bundler from this function and have the caller code to an interface. But the bundling APIs are not great and getbundlechunks() is the best API we have for obtaining bundle contents in a unified manner. We change getbundlechunks() to return a dict that we can use to communicate metadata. We populate that dict with the bundle version number to demonstrate some value. .. api:: exchange.getbundlechunks() now returns a 2-tuple instead of just an iterator. Differential Revision: https://phab.mercurial-scm.org/D1925
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Gregory Szorc authored
repo.requirements is a set. We need to sort it so the part content is deterministic. Differential Revision: https://phab.mercurial-scm.org/D1924
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Gregory Szorc authored
We currently assume there is a symmetric relationship of bundle2 capabilities between client and server. However, this may not always be the case. We need a bundle2 capability to advertise bundle2 streaming clone support on servers to differentiate it from the existing, legacy streaming clone support. However, servers may wish to disable streaming clone support. If bundle2 capabilities were the same between client and server, a client (which may also be a server) that has disabled streaming clone support would not be able to perform a streaming clone itself! This commit introduces a "role" argument to bundle2.getrepocaps() that explicitly defines the role being performed. This will allow us (and extensions) to alter bundle2 capabilities depending on the operation being performed. Differential Revision: https://phab.mercurial-scm.org/D1923
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Gregory Szorc authored
Errors should be small. There's no real need to compress them. Truth be told, there's no good reason to not compress them either. But leaving them uncompressed makes it easier to test failures by looking at the raw HTTP response. This makes it easier for us to write tests. It may make it easier for people writing their own clients. Differential Revision: https://phab.mercurial-scm.org/D1922
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- Jan 21, 2018
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Gregory Szorc authored
We add the ability to specify arbitrary HTTP request headers and to save the HTTP response body to a file. These will be used in upcoming commits. Differential Revision: https://phab.mercurial-scm.org/D1921
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- Jan 20, 2018
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Gregory Szorc authored
I'm about to add another flag and I don't want to deal with this organic, artisanal argument parser. Differential Revision: https://phab.mercurial-scm.org/D1920
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