Hello everyone,
On 10/02/2022 03:48, Chuck Silvers wrote:
The branch main has been updated by chs:
URL:
https://cgit.FreeBSD.org/src/commit/?id=f339a3ef6369b368f3a2455792a7a3a4c28f92c4
commit f339a3ef6369b368f3a2455792a7a3a4c28f92c4
Author: Chuck Silvers <[email protected]>
AuthorDate: 2022-02-10 01:09:26 +0000
Commit: Chuck Silvers <[email protected]>
CommitDate: 2022-02-10 01:09:26 +0000
dtrace: remove unnecessary fflush()
This call was added back in the early days of dtrace porting and
no one knows why anymore. The extra flushing causes lots of
unnecessary CPU overhead when a script produces lots of output,
as well as easily losing output because the command can't keep up.
Did you have some specific way to measure the CPU overhead of DTrace here? I'm interested in this
kind of performance measurements and I wonder if anything more sophisticated than observing top(1)
was used to test this change. Thanks!
Best,
Mateusz Piotrowski
