Use hwloc for setting task affinity. #8
Closed
Conversation
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Using sched_set_affinity, sched_get_affinity, and pthread_attr_setaffinity_np are not portable beyond glibc/Linux. hwloc has APIs for setting the affinity, so we can use those instead. The plumbing for doing this for a thread in particular is a little annoying, as it requires a function prior to testcase_trampoline to set the affinity.
Closed
|
Since the thread affinity is now set after creating the thread, it might be worthwhile to create the thread after setting process affinity (similar to what's done for processes). A quick question. While testing your patch on freebsd 11.2, noticed that hwloc-ps does not work on freebsd. Does hwlock-ps work on netbsd? If not, how do you confirm the process/thread cpu affinity? |
|
Solved by #12 |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Using sched_set_affinity, sched_get_affinity, and
pthread_attr_setaffinity_np are not portable beyond glibc/Linux. hwloc
has APIs for setting the affinity, so we can use those instead. The
plumbing for doing this for a thread in particular is a little annoying,
as it requires a function prior to testcase_trampoline to set the
affinity.