https://bugzilla.redhat.com/show_bug.cgi?id=2401972
Bug ID: 2401972
Summary: Review Request: qthreads - Lightweight locality-aware
user-level threading runtime
Product: Fedora
Version: rawhide
OS: Linux
Status: NEW
Component: Package Review
Severity: medium
Assignee: [email protected]
Reporter: [email protected]
QA Contact: [email protected]
CC: [email protected]
Target Milestone: ---
Classification: Fedora
spec: https://fed500.fedorapeople.org/qthreads.spec
srpm: https://fed500.fedorapeople.org/qthreads-1.22-1.fc42.src.rpm
description:
The Qthreads API is designed to make using large numbers of threads convenient
and easy. The Qthreads API also provides access to full/empty-bit (FEB)
semantics, where every word of memory can be marked either full or empty, and a
thread can wait for any word to attain either state.
Qthreads is essentially a library for spawning and controlling stackful
coroutines: threads with small (4-8k) stacks. The exposed user API resembles
OS threads, however the threads are entirely in user-space and use their
locked/unlocked status as part of their scheduling.
The library's metaphor is that there are many Qthreads and several "shepherds".
Shepherds generally map to specific processors or memory regions, but this is
not an explicit part of the API. Qthreads are assigned to specific shepherds
and are only allowed to migrate when running on a scheduler that supports work
stealing or when migration is explicitly triggered via user APIs.
The API includes utility functions for making threaded loops, sorting, and
similar operations convenient.
fas: fed500
Reproducible: Always
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