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| author | Lasse Collin <lasse.collin@tukaani.org> | 2022-04-14 12:59:09 +0300 |
|---|---|---|
| committer | Lasse Collin <lasse.collin@tukaani.org> | 2022-04-14 13:00:40 +0300 |
| commit | 0adc13bfe32c14f3e4c6ce9f2d4fdf4112ab53f4 (patch) | |
| tree | 3be604a3828ab11f6286340bec3df3a5ddbe946a /src/xz/hardware.h | |
| parent | xz: Changes to --memlimit-compress and --no-adjust. (diff) | |
| download | xz-0adc13bfe32c14f3e4c6ce9f2d4fdf4112ab53f4.tar.xz | |
xz: Make -T0 use multithreaded mode on single-core systems.
The main problem withi the old behavior is that the compressed
output is different on single-core systems vs. multicore systems.
This commit fixes it by making -T0 one thread in multithreaded mode
on single-core systems.
The downside of this is that it uses more memory. However, if
--memlimit-compress is used, xz can (thanks to the previous commit)
drop to the single-threaded mode still.
Diffstat (limited to 'src/xz/hardware.h')
| -rw-r--r-- | src/xz/hardware.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/src/xz/hardware.h b/src/xz/hardware.h index cefd7d10..1a5a7a67 100644 --- a/src/xz/hardware.h +++ b/src/xz/hardware.h @@ -21,6 +21,10 @@ extern void hardware_threads_set(uint32_t threadlimit); /// Get the maximum number of worker threads. extern uint32_t hardware_threads_get(void); +/// Returns true if multithreaded mode should be used for .xz compression. +/// This can be true even if the number of threads is one. +extern bool hardware_threads_is_mt(void); + /// Set the memory usage limit. There are separate limits for compression, /// decompression (also includes --list), and multithreaded decompression. |