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Author SHA1 Message Date
Jade Lovelace
473d2d56fc Remove 100s of CPU time (10%) from build times (1465s -> 1302s) 
Result's from Mic92's framework 13th Gen Intel Core i7-1360P:

Before: 3595.92s user 183.01s system 1360% cpu 4:37.74 total
After: 3486.07s user 168.93s system 1354% cpu 4:29.79 total

I saw that boost/lexical_cast was costing about 100s in CPU time on our
compiles. We can fix this trivially by doing explicit template
instantiation in exactly one place and eliminating all other includes of
it, which is a code improvement anyway by hiding the boost.

Before:
```
lix/lix2 » ClangBuildAnalyzer --analyze buildtimeold.bin
Analyzing build trace from 'buildtimeold.bin'...
**** Time summary:
Compilation (551 times):
  Parsing (frontend):         1465.3 s
  Codegen & opts (backend):   1110.9 s

<snip>

**** Expensive headers:
178153 ms: ../src/libcmd/installable-value.hh (included 52 times, avg 3426 ms), included via:
  40x: command.hh
  5x: command-installable-value.hh
  3x: installable-flake.hh
  2x: <direct include>
  2x: installable-attr-path.hh

176217 ms: ../src/libutil/error.hh (included 246 times, avg 716 ms), included via:
  36x: command.hh installable-value.hh installables.hh derived-path.hh config.hh experimental-features.hh
  12x: globals.hh config.hh experimental-features.hh
  11x: file-system.hh file-descriptor.hh
  6x: serialise.hh strings.hh
  6x: <direct include>
  6x: archive.hh serialise.hh strings.hh
  ...

173243 ms: ../src/libstore/store-api.hh (included 152 times, avg 1139 ms), included via:
  55x: <direct include>
  39x: command.hh installable-value.hh installables.hh
  7x: libexpr.hh
  4x: local-store.hh
  4x: command-installable-value.hh installable-value.hh installables.hh
  3x: binary-cache-store.hh
  ...

170482 ms: ../src/libutil/serialise.hh (included 201 times, avg 848 ms), included via:
  37x: command.hh installable-value.hh installables.hh built-path.hh realisation.hh hash.hh
  14x: store-api.hh nar-info.hh hash.hh
  11x: <direct include>
  7x: primops.hh eval.hh attr-set.hh nixexpr.hh value.hh source-path.hh archive.hh
  7x: libexpr.hh value.hh source-path.hh archive.hh
  6x: fetchers.hh hash.hh
  ...

169397 ms: ../src/libcmd/installables.hh (included 53 times, avg 3196 ms), included via:
  40x: command.hh installable-value.hh
  5x: command-installable-value.hh installable-value.hh
  3x: installable-flake.hh installable-value.hh
  2x: <direct include>
  1x: installable-derived-path.hh
  1x: installable-value.hh
  ...

159740 ms: ../src/libutil/strings.hh (included 221 times, avg 722 ms), included via:
  37x: command.hh installable-value.hh installables.hh built-path.hh realisation.hh hash.hh serialise.hh
  19x: <direct include>
  14x: store-api.hh nar-info.hh hash.hh serialise.hh
  11x: serialise.hh
  7x: primops.hh eval.hh attr-set.hh nixexpr.hh value.hh source-path.hh archive.hh serialise.hh
  7x: libexpr.hh value.hh source-path.hh archive.hh serialise.hh
  ...

156796 ms: ../src/libcmd/command.hh (included 51 times, avg 3074 ms), included via:
  42x: <direct include>
  7x: command-installable-value.hh
  2x: installable-attr-path.hh

150392 ms: ../src/libutil/types.hh (included 251 times, avg 599 ms), included via:
  36x: command.hh installable-value.hh installables.hh path.hh
  11x: file-system.hh
  10x: globals.hh
  6x: fetchers.hh
  6x: serialise.hh strings.hh error.hh
  5x: archive.hh
  ...

133101 ms: /nix/store/644b90j1vms44nr18yw3520pzkrg4dd1-boost-1.81.0-dev/include/boost/lexical_cast.hpp (included 226 times, avg 588 ms), included via
:
  37x: command.hh installable-value.hh installables.hh built-path.hh realisation.hh hash.hh serialise.hh strings.hh
  19x: file-system.hh
  11x: store-api.hh nar-info.hh hash.hh serialise.hh strings.hh
  7x: primops.hh eval.hh attr-set.hh nixexpr.hh value.hh source-path.hh archive.hh serialise.hh strings.hh
  7x: libexpr.hh value.hh source-path.hh archive.hh serialise.hh strings.hh
  6x: eval.hh attr-set.hh nixexpr.hh value.hh source-path.hh archive.hh serialise.hh strings.hh
  ...

132887 ms: /nix/store/h2abv2l8irqj942i5rq9wbrj42kbsh5y-gcc-12.3.0/include/c++/12.3.0/memory (included 262 times, avg 507 ms), included via:
  36x: command.hh installable-value.hh installables.hh path.hh types.hh ref.hh
  16x: gtest.h
  11x: file-system.hh types.hh ref.hh
  10x: globals.hh types.hh ref.hh
  10x: json.hpp
  6x: serialise.hh
  ...

  done in 0.6s.
```

After:
```
lix/lix2 » maintainers/buildtime_report.sh build
Processing all files and saving to '/home/jade/lix/lix2/maintainers/../buildtime.bin'...
  done in 0.6s. Run 'ClangBuildAnalyzer --analyze /home/jade/lix/lix2/maintainers/../buildtime.bin' to analyze it.
Analyzing build trace from '/home/jade/lix/lix2/maintainers/../buildtime.bin'...
**** Time summary:
Compilation (551 times):
  Parsing (frontend):         1302.1 s
  Codegen & opts (backend):    956.3 s

<snip>

**** Expensive headers:
178145 ms: ../src/libutil/error.hh (included 246 times, avg 724 ms), included via:
  36x: command.hh installable-value.hh installables.hh derived-path.hh config.hh experimental-features.hh
  12x: globals.hh config.hh experimental-features.hh
  11x: file-system.hh file-descriptor.hh
  6x: <direct include>
  6x: serialise.hh strings.hh
  6x: fetchers.hh hash.hh serialise.hh strings.hh
  ...

154043 ms: ../src/libcmd/installable-value.hh (included 52 times, avg 2962 ms), included via:
  40x: command.hh
  5x: command-installable-value.hh
  3x: installable-flake.hh
  2x: <direct include>
  2x: installable-attr-path.hh

153593 ms: ../src/libstore/store-api.hh (included 152 times, avg 1010 ms), included via:
  55x: <direct include>
  39x: command.hh installable-value.hh installables.hh
  7x: libexpr.hh
  4x: local-store.hh
  4x: command-installable-value.hh installable-value.hh installables.hh
  3x: binary-cache-store.hh
  ...

149948 ms: ../src/libutil/types.hh (included 251 times, avg 597 ms), included via:
  36x: command.hh installable-value.hh installables.hh path.hh
  11x: file-system.hh
  10x: globals.hh
  6x: fetchers.hh
  6x: serialise.hh strings.hh error.hh
  5x: archive.hh
  ...

144560 ms: ../src/libcmd/installables.hh (included 53 times, avg 2727 ms), included via:
  40x: command.hh installable-value.hh
  5x: command-installable-value.hh installable-value.hh
  3x: installable-flake.hh installable-value.hh
  2x: <direct include>
  1x: installable-value.hh
  1x: installable-derived-path.hh
  ...

136585 ms: ../src/libcmd/command.hh (included 51 times, avg 2678 ms), included via:
  42x: <direct include>
  7x: command-installable-value.hh
  2x: installable-attr-path.hh

133394 ms: /nix/store/h2abv2l8irqj942i5rq9wbrj42kbsh5y-gcc-12.3.0/include/c++/12.3.0/memory (included 262 times, avg 509 ms), included via:
  36x: command.hh installable-value.hh installables.hh path.hh types.hh ref.hh
  16x: gtest.h
  11x: file-system.hh types.hh ref.hh
  10x: globals.hh types.hh ref.hh
  10x: json.hpp
  6x: serialise.hh
  ...

89315 ms: ../src/libstore/derived-path.hh (included 178 times, avg 501 ms), included via:
  37x: command.hh installable-value.hh installables.hh
  25x: store-api.hh realisation.hh
  7x: primops.hh eval.hh attr-set.hh nixexpr.hh value.hh context.hh
  6x: eval.hh attr-set.hh nixexpr.hh value.hh context.hh
  6x: libexpr.hh value.hh context.hh
  6x: shared.hh
  ...

87347 ms: /nix/store/h2abv2l8irqj942i5rq9wbrj42kbsh5y-gcc-12.3.0/include/c++/12.3.0/ostream (included 273 times, avg 319 ms), included via:
  35x: command.hh installable-value.hh installables.hh path.hh types.hh ref.hh memory unique_ptr.h
  12x: regex sstream istream
  10x: file-system.hh types.hh ref.hh memory unique_ptr.h
  10x: gtest.h memory unique_ptr.h
  10x: globals.hh types.hh ref.hh memory unique_ptr.h
  6x: fetchers.hh types.hh ref.hh memory unique_ptr.h
  ...

85249 ms: ../src/libutil/config.hh (included 213 times, avg 400 ms), included via:
  37x: command.hh installable-value.hh installables.hh derived-path.hh
  20x: globals.hh
  20x: logging.hh
  16x: store-api.hh logging.hh
  6x: <direct include>
  6x: eval.hh attr-set.hh nixexpr.hh value.hh context.hh derived-path.hh
  ...

  done in 0.5s.
```

Adapated from 18aa3e1d57
 2024-05-31 13:00:09 +02:00
John Ericson
5384ceacc3 Document field being initialized in Machine constructor 2024-05-23 11:28:25 -04:00
John Ericson
f2bcebc450 Restore exposing machine file parsing 
This was accidentally removed in
e989c83b44. I restored it and also did a
few other cleanups:

- Make a static method for namespacing purposes

- Put the test files in the data dir with the other test data

- Avoid mutating globals in the machine config tests

This will be used by Hydra.
 2024-05-23 00:03:52 -04:00
John Ericson
b3ebcc5aad Use the new StoreReference in Machine 
This makes the remote builder abstract syntax more robust.
 2024-05-22 09:20:15 -04:00
John Ericson
1e24db6f9a Convert Machine::speedFactor from a non-neg int to a non-neg float 
The short motivation is to match Hydra, so we can de-dup.

The long version is layed out in
https://github.com/NixOS/nix/issues/9840.
 2024-01-24 01:03:07 -05:00
John Ericson
0aa85088de Factor out Machine::systemSupported 
There's just enough logic (the `"builtin"` special case) that makes this
worthy of its own method.
 2024-01-23 12:53:51 -05:00
John Ericson
739032762a Make Machine::systemTypes a set not vector 
This is more conceptually correct (the order does not matter), and also
matches what Hydra already does.

(Nix and Hydra matching is needed for dedup
https://github.com/NixOS/hydra/issues/1164)
 2024-01-23 12:30:26 -05:00
John Ericson
ac89bb064a Split up util.{hh,cc} 
All OS and IO operations should be moved out, leaving only some misc
portable pure functions.

This is useful to avoid copious CPP when doing things like Windows and
Emscripten ports.

Newly exposed functions to break cycles:

 - `restoreSignals`
 - `updateWindowSize`
 2023-11-05 12:20:02 -05:00
Eelco Dolstra
df552ff53e Remove std::string alias (for real this time) 
Also use std::string_view in a few more places.
 2022-02-25 16:13:02 +01:00
Eelco Dolstra
e6795c4350 Style 2021-10-29 14:45:13 +02:00
Alexey Novikov
e989c83b44 Add error reporting to machine spec paser 
Currently machine specification (`/etc/nix/machine`) parser fails
with a vague exception if the file had incorrect format.
This commit adds verbose exceptions and unit-tests for the parser.
 2021-10-17 12:45:56 +04:00
Thomas Churchman
e3d11f9a9c Improve machine store URI parsing 2021-06-23 22:09:22 +01:00
Graham Christensen
1130b28824
distributed builds: load remote builder host key from the machines file 
This is already used by Hydra, and is very useful when materializing
a remote builder list from service discovery. This allows the service
discovery tool to only sync one file instead of two.
 2021-02-25 09:17:34 -05:00
John Ericson
4720853129 Make system-features a store setting 
This seems more correct. It also means one can specify the features a
store should support with --store and remote-store=..., which is useful.
I use this to clean up the build remotes test.
 2020-08-12 18:13:00 +00:00
Eelco Dolstra
2bc6304793 getMachines(): Cache result 2019-04-01 21:09:35 +02:00
Eelco Dolstra
d16fd24973
Allow shorter syntax for chroot stores 
You can now say '--store /tmp/nix' instead of '--store local?root=/tmp/nix'.
 2017-10-24 15:32:38 +02:00
Eelco Dolstra
af241ae7d3
Remove the builder-files option 
You can now include files via the "builders" option, using the syntax
"@<filename>". Having only one option makes it easier to override
builders completely.

For backward compatibility, the default is "@/etc/nix/machines", or
"@<filename>" for each file name in NIX_REMOTE_SYSTEMS.
 2017-10-24 10:54:43 +02:00
Jörg Thalheim
2fd8f8bb99 Replace Unicode quotes in user-facing strings by ASCII 
Relevant RFC: NixOS/rfcs#4

$ ag -l | xargs sed -i -e "/\"/s/’/'/g;/\"/s/‘/'/g"
 2017-07-30 12:32:45 +01:00
Eelco Dolstra
bb50c89319
Make the location of the build directory in the sandbox configurable 
This is mostly for use in the sandbox tests, since if the Nix store is
under /build, then we can't use /build as the build directory.
 2017-05-05 17:45:22 +02:00
Eelco Dolstra
7f6837a0f6
Replace $NIX_REMOTE_SYSTEMS with an option "builder-files" 
Also, to unify with hydra-queue-runner, allow it to be a list of
files.
 2017-05-02 15:46:09 +02:00
Eelco Dolstra
1a68710d4d
Add an option for specifying remote builders 
This is useful for one-off situations where you want to specify a
builder on the command line instead of having to mess with
nix.machines. E.g.

  $ nix-build -A hello --argstr system x86_64-darwin \
    --option builders 'root@macstadium1 x86_64-darwin'

will perform the specified build on "macstadium1".

It also removes the need for a separate nix.machines file since you
can specify builders in nix.conf directly. (In fact nix.machines is
yet another hack that predates the general nix.conf configuration
file, IIRC.)

Note: this option is supported by the daemon for trusted users. The
fact that this allows trusted users to specify paths to SSH keys to
which they don't normally have access is maybe a bit too much trust...
 2017-05-02 15:42:43 +02:00
Eelco Dolstra
ebc9f36a81
Factor out machines.conf parsing 
This allows hydra-queue-runner to use it.
 2017-05-02 13:17:37 +02:00