[v4,0/1] Add thread affinity
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Message ID 20241015065533.356466-1-chenghaoyang@chromium.org
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  • Add thread affinity
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Harvey Yang Oct. 15, 2024, 6:54 a.m. UTC 
Hi folks,

This patch adds a method to set thread affinity, which is needed to
ensure performance in mtkisp7 pipeline handler and IPA.

This passes gitlab pipeline:
https://gitlab.freedesktop.org/chenghaoyang/libcamera/-/pipelines/1290319

v4:
- Use `sizeof(data_->cpuset_.value())`.

v3:
- Keep the cpu indices in ThreadData.

v2:
- Check cpu indices within [0, `std::thread::hardware_concurrency()`).
- Limit max size of cpus to be CPU_SETSIZE.

BR,
Harvey

Han-Lin Chen (1):
  libcamera: add method to set thread affinity

 include/libcamera/base/thread.h |  5 ++++
 src/libcamera/base/thread.cpp   | 53 +++++++++++++++++++++++++++++++++
 2 files changed, 58 insertions(+)