Summary:
This crate provides the core features of the commonly known `Bytes` crate:
zero-copy slicing and cloning, while also supports mmap-backed buffers.
The main motivation is to replace `Mmap` in `indexedlog`. That has multiple
benefits:
- Handles 0-sized mmap more cleanly.
- Handles clones more cleanly.
- Gain the flexibility to zero-copy data without lifetime / reference.
- Gain the flexibility to switch to non-mmap data.
The `bytes::Bytes` crate does not yet support mmap buffers as of its latest
release (0.5.4).
Implementation wise, `minibytes::Bytes` uses `Option<Arc<dyn Trait>>` for the
"trait object". This makes implementing the mmap storage just one line.
`bytes 0.5.4` re-invents the "trait object" manually using unsafe code. It requires
about 50 lines to implement the mmap storage (in D19756122).
Reviewed By: xavierd
Differential Revision: D19770856
fbshipit-source-id: 8cfa7052a18ac2e0cd6348b77d5e2a4acc61195c
Summary:
Our main data table has no information about the actual failure. Let's
upload a stack trace to blob storage and link to it from the main table.
Reviewed By: quark-zju
Differential Revision: D19780653
fbshipit-source-id: acaab29a47d32dd6ab81fed0c3ae50c8eb44b760
Summary:
If the main process forks, the connection to the cache client is likely
unusable. Let's drop that connection and we can recreate it later if needed.
Reviewed By: quark-zju
Differential Revision: D19796387
fbshipit-source-id: 59b0d3db9655d2233b55effcdf18cbd74a3f5edd
Summary: All the crates are present in third-party/rust, let's use it in the OSS build instead of fetching a tarball of all the crates.
Reviewed By: fanzeyi
Differential Revision: D19770783
fbshipit-source-id: f0d74bb0807be207d599d4868f907d38099c7f5b
Summary:
We're seeing an error where worker processes fail to fetch data from
the server. Our theory is that the forking messes up the ssh connection, so
let's not reuse ssh connections across forks.
Reviewed By: xavierd
Differential Revision: D19794281
fbshipit-source-id: 3954cd96617fd18ecf0d0aa9b9a6ce774c494067
Summary:
In D19581174 I made `--debug` trigger ipdb session for `.t` tests.
This diff adds similar feature for `.py` tests.
Reviewed By: DurhamG
Differential Revision: D19784795
fbshipit-source-id: 9118c74ea465320f15aa6ad5e1e04d8bc1a49966
Summary:
Currently existing validation won't catch a bug where commits `a <- b` get
replayed as `b <- a` as long as they don't touch the same files. Let's add
such check.
Reviewed By: StanislavGlebik
Differential Revision: D19723150
fbshipit-source-id: ddc15063b9ae4fc38416ab9b96681da302fec8d4
Summary: after reviewing my stack D18647089 , chadaustin recommended some documentation surrounding this area since it is a bit more complex now, and since it was easy to deadlock and there are a lot of moving parts, I added documentation about how the diff path works, including the new code path, and other non-trivial parts.
Reviewed By: chadaustin
Differential Revision: D19688435
fbshipit-source-id: f6512340421e7c25d4fb4d27177c6187eb57ccbf
Summary:
In order to uniquely identify a blobstore multiplexer configuration,
add an ID.
Reviewed By: krallin
Differential Revision: D19770058
fbshipit-source-id: 8e09d5531d1d27b337cf62a6126f88ce15de341b
Summary: fixes printing for no match found in revlog match
Reviewed By: quark-zju
Differential Revision: D19652374
fbshipit-source-id: 55bfcbff7919ad817173241e2792df27311b931e
Summary:
Follow up from D19718839 - let's add a function that will safely sync a commit
from one repo to another. Other function to sync a commit are prefixed with
unsafe
Reviewed By: krallin
Differential Revision: D19769762
fbshipit-source-id: 844da3e2c1cc39ef3cd86d282d275d860be55f44
Summary:
If we e.g. a getpack for path like "foo\"bar", then we can't decode it into a
`&str` because we need to allocate a new `String` to hold it. At the same time,
if the path is "foo bar", then having a reference into the JSON we received is
nicer.
Right now, we expect a `&str`, so the latter case. But, if we find command args
from the first case, we can't deserialize them. To fix this, let's use
`Cow<...>`, which lets us either have a referenced or an owned string.
Also, let's add tests to confirm this works.
Reviewed By: ikostia
Differential Revision: D19767689
fbshipit-source-id: bf9e06d4a885638073c819a25a68810ff44f2546
Summary:
Instead of fetching a tarball for the vendored Rust crates, let's just use
what's present in third-party/rust.
Reviewed By: wez, fanzeyi
Differential Revision: D19770580
fbshipit-source-id: ca6615a5f5c672d9a5527ad47feab6bdd33a39db
Summary:
Print out the name of the commit and the stack.
Hopefully this can help making debugging KeyErrors easier.
Reviewed By: DurhamG
Differential Revision: D19776181
fbshipit-source-id: 2eb985dd5355732a4d7728af68eb16173c48caa5
Summary: This makes the output more readable even if the "name" of a span is very long.
Reviewed By: DurhamG
Differential Revision: D19780536
fbshipit-source-id: dce0d3777409c32b0752db51341a572addb823ea
Summary:
The use of json meant the progress step was coming out as unicode when
it should be str. Use the mercurial.json functions to solve this for python 2
and 3.
Reviewed By: xavierd
Differential Revision: D19777255
fbshipit-source-id: 15c8e45425fc8742b6e118249104fc1fb2f3345d
Summary:
Fetching things from MySQL sequentially in a buffered fashion is a bad
practice, since we might end up saturating the underlying MySQL pool, and
starving other MySQL clients.
Instead, let's make fewer, bigger queries.
Reviewed By: ahornby
Differential Revision: D19766787
fbshipit-source-id: 1cf9102eaca8cc1ab55b7b85039ca99627a86b71
Summary:
Fetching things from MySQL sequentially in a buffered fashion is a bad
practice, since we might end up saturating the underlying MySQL pool with a lot
of requests. Doing so will result in other queries being delayed as they wait
behind our batch of queries, which results in higher dispatch latency.
Instead, let's make fewer, bigger queries. Also, while we're in here, let's
update blobrepo to have an up-to-date comment.
Reviewed By: StanislavGlebik
Differential Revision: D19766788
fbshipit-source-id: 318ec4778ca259b210d431fc2add8b327bfce99a
Summary: We don't need to log so many blob fetches. Let's not.
Reviewed By: HarveyHunt
Differential Revision: D19766017
fbshipit-source-id: 674dee276234f96938a9459af18dd78d09243350
Summary: This will let us lower Scuba utilization from Fastreplay.
Reviewed By: HarveyHunt
Differential Revision: D19766018
fbshipit-source-id: 4eac19b929914db910ed13096b2a5910c134ed3a
Summary:
If the user requests blame information for a file where the blame was rejected
(either becuase the file is too big, or because it is binary), this should be
considered a request error.
Reviewed By: farnz
Differential Revision: D19768261
fbshipit-source-id: 7f0d7ba53fe1087b68f4432ec0c6de0353dc3885
Summary: Mononoke is becoming part of Eden repository, remove it's getdeps manifest until we finalize the move.
Reviewed By: krallin
Differential Revision: D19769090
fbshipit-source-id: 9b471686728e9ff28317f9157f5f8a1834c5f5e4
Summary: They are not used much - let's use new futures instead
Reviewed By: krallin
Differential Revision: D19767952
fbshipit-source-id: c04bcf5efc6f8ee6f1d31254fcb2cb4603769b91
Summary:
Suggestions come in the error message as it is currently implemented in
Mercurial code. Format of suggestions also stays the same.
We give the hash, time, author and the title.
All suggestions are ordered (most recent go first).
We don't show them if there are two many.
Reviewed By: krallin
Differential Revision: D19732053
fbshipit-source-id: b94154cbc5a4f440a0053fc3fac2bca2ae0b7119
Summary:
Useful for debugging.
I also fixed how we open a SqlSyncedCommitMapping, because we used incorrect path for that.
Reviewed By: ikostia
Differential Revision: D19767148
fbshipit-source-id: baf67bceceb7b22429b05b41020cf4350e3c87bd
Summary:
This is the api that will be used by Sandcastle to remap a commit from one repo
to another.
Previously the implementation api was just looking in the commit mapping table,
but that's not enough - draft commit cloud commits are not in this table, so we
actually need to sync them.
There's a caveat though - we allow syncing public commits from a large repo to
a small repo, but not the other way around. Comment in the code has more info
about it.
Reviewed By: ikostia
Differential Revision: D19718839
fbshipit-source-id: 9939530f818fafd22bc3838b4647dd9cbc1c8c07
Summary:
Jump from "generating filenodes while generating hg changeset" to "generate
filenodes separately" is tricky to do without breaking production. This diff
adds additional logic in IncompleteFilenodes that should make this transition
smoother. See code comment for more details.
Reviewed By: krallin
Differential Revision: D19741913
fbshipit-source-id: 48987c15fc4144c50afcee7ae34072f6cd634271
Summary:
Now that the source of truth for third-party crates is in fbsource, let's use
it in our cargo build system. This removes the need to fetch a tarball and
untar it, which should have the benefit of speeding up the build.
A small caveat is the first build on EdenFS will be slightly slower, due to
crates needing to be individually fetched, subsequent builds will be faster.
Reviewed By: jsgf
Differential Revision: D19726217
fbshipit-source-id: 24f484d1e3118a76e052f07ff3eea0c66cccce96
Summary: In addition to duration and success, log object fetch counts and checkout type to Scuba.
Reviewed By: fanzeyi
Differential Revision: D19334276
fbshipit-source-id: dabf52427f2ebda2b58df93194df39d52f4fcb4f
Summary: Log the number of object lookups and cache hit rates for a checkout operation.
Reviewed By: simpkins
Differential Revision: D19191201
fbshipit-source-id: 5e9ad501e704810f072dabcda3fce86d027c452e
Summary:
During checkout and stats, count every object fetch and which level of
cache it was served from.
Reviewed By: simpkins
Differential Revision: D19186333
fbshipit-source-id: fc0a74db297b9c723682e245996a7befd762f933
