High cpu usage by many select() syscalls
Bug #1876918 reported by
Tobias Karnat
This bug affects 1 person
| Affects | Status | Importance | Assigned to | Milestone | |
|---|---|---|---|---|---|
| arpon (Ubuntu) |
New
|
Undecided
|
Unassigned | ||
Bug Description
Please consider the following patch to switch from select() with 1 ms timeout to epoll_wait() without timeout.
# syscount-bpfcc -i 1
Tracing syscalls, printing top 10... Ctrl+C to quit
[14:48:24]
SYSCALL COUNT
select 1497
With applied patch the used system time is greatly reduced.
Revision history for this message
| Tobias Karnat (tobiaskarnat-remondis) wrote | #1 |
Revision history for this message
| Ubuntu Foundations Team Bug Bot (crichton) wrote | #2 |
| tags: | added: patch |
Revision history for this message
| Tobias Karnat (tobiaskarnat-remondis) wrote | #3 |
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The attachment "arpon-epoll.patch" seems to be a patch. If it isn't, please remove the "patch" flag from the attachment, remove the "patch" tag, and if you are a member of the ~ubuntu-reviewers, unsubscribe the team.
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