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lix/src/libutil
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Daniël de Kok 2de232d2b3 Add x86_64 compute levels as additional system types 
When performing distributed builds of machine learning packages, it
would be nice if builders without the required SIMD instructions can
be excluded as build nodes.

Since x86_64 has accumulated a large number of different instruction
set extensions, listing all possible extensions would be unwieldy.
AMD, Intel, Red Hat, and SUSE have recently defined four different
microarchitecture levels that are now part of the x86-64 psABI
supplement and will be used in glibc 2.33:

https://gitlab.com/x86-psABIs/x86-64-ABI
https://lwn.net/Articles/844831/

This change uses libcpuid to detect CPU features and then uses them to
add the supported x86_64 levels to the additional system types. For
example on a Ryzen 3700X:

$ ~/aps/bin/nix -vv --version | grep "Additional system"
Additional system types: i686-linux, x86_64-v1-linux, x86_64-v2-linux, x86_64-v3-linux
2021-02-22 09:11:15 +01:00
..
tests Improve error formatting 2021-01-21 11:02:09 +01:00
abstract-setting-to-json.hh abstractsettingtojson.hh -> abstract-setting-to-json.hh 2020-09-21 18:49:43 +02:00
affinity.cc affinity operator<< 2020-05-04 14:44:00 -06:00
affinity.hh Run the daemon worker on the same CPU as the client 2013-08-07 14:02:04 +02:00
ansicolor.hh Fix ANSI color constants 2020-07-12 16:52:20 +02:00
archive.cc read(): Use char * instead of unsigned char * 2020-12-02 14:17:27 +01:00
archive.hh Add forgotten override annotation 2020-12-02 14:23:38 +01:00
args.cc Support --no-net for backwards compatibility 2021-02-07 20:44:56 +01:00
args.hh Support --no-net for backwards compatibility 2021-02-07 20:44:56 +01:00
callback.hh Move Callback into its own header 2020-09-21 18:42:21 +02:00
comparator.hh Move the GENERATE_CMP macro to its own file 2021-02-05 11:42:33 +01:00
compression.cc Sink: Use std::string_view 2020-12-02 14:17:27 +01:00
compression.hh Fix Brotli decompression in 'nix log' 2018-08-06 15:40:29 +02:00
compute-levels.cc Add x86_64 compute levels as additional system types 2021-02-22 09:11:15 +01:00
compute-levels.hh Add x86_64 compute levels as additional system types 2021-02-22 09:11:15 +01:00
config.cc string2Int(): Return std::optional 2021-01-08 12:22:21 +01:00
config.hh Generalize extra-* settings 2020-10-29 18:17:39 +01:00
error.cc Merge pull request #4467 from edolstra/error-formatting 2021-01-25 12:50:57 +01:00
error.hh Improve error formatting 2021-01-21 11:02:09 +01:00
finally.hh Add missing #include 2016-11-07 14:35:47 +01:00
fmt.hh Formatting 2020-10-07 16:33:19 +02:00
hash.cc Sink: Use std::string_view 2020-12-02 14:17:27 +01:00
hash.hh Sink: Use std::string_view 2020-12-02 14:17:27 +01:00
json.cc Fix build 2020-07-30 15:27:28 +02:00
json.hh Make std::uncaught_exception warning less noisy 2019-10-09 23:04:11 +02:00
local.mk Add x86_64 compute levels as additional system types 2021-02-22 09:11:15 +01:00
logging.cc Improve error formatting 2021-01-21 11:02:09 +01:00
logging.hh Add lvlNotice log level 2020-12-10 16:41:24 +01:00
lru-cache.hh Missing #include <cassert> in lru-cache.hh (#3654) 2020-06-03 10:15:22 +00:00
monitor-fd.hh monitor-fds: Fix on macOS. 2018-02-14 18:26:37 -05:00
pool.hh RemoteStore: Close connection if an exception occurs 2018-10-16 23:36:15 +02:00
ref.hh Allow setting the state directory as a store parameter 2016-06-02 16:02:48 +02:00
rust-ffi.cc StorePath: Rewrite in C++ 2020-06-16 14:28:41 +02:00
rust-ffi.hh StorePath: Rewrite in C++ 2020-06-16 14:28:41 +02:00
serialise.cc Improve error formatting 2021-01-21 11:02:09 +01:00
serialise.hh read(): Use char * instead of unsigned char * 2020-12-02 14:17:27 +01:00
split.hh Typo 2020-09-17 20:21:04 +02:00
sync.hh sync.hh: return cv_status instead of dropping it, in case useful. 2018-06-18 17:31:00 -05:00
tarfile.cc read(): Use char * instead of unsigned char * 2020-12-02 14:17:27 +01:00
tarfile.hh libarchive proof of concept 2019-12-07 22:35:14 +07:00
thread-pool.cc Fix a hang in ThreadPool 2017-10-09 15:41:09 +02:00
thread-pool.hh Fix extra ; warnings involving MakeError 2019-11-10 11:24:47 -05:00
topo-sort.hh Add missing #pragma once 2020-10-06 10:40:07 +02:00
types.hh Move Explicit 2020-10-26 17:01:20 +01:00
url-parts.hh Merge branch 'slashes-in-github-branches' of https://github.com/Ma27/nix 2021-01-18 12:55:06 +01:00
url.cc Don't include <regex> in header files 2020-09-21 18:22:45 +02:00
url.hh Don't include <regex> in header files 2020-09-21 18:22:45 +02:00
util.cc Remove trailing whitespace 2021-01-21 11:02:09 +01:00
util.hh Remove trailing whitespace 2021-01-21 11:02:09 +01:00
xml-writer.cc Cleanup 2019-11-06 16:53:02 +01:00
xml-writer.hh Fix some random -Wconversion warnings 2018-05-02 13:56:34 +02:00