Re: git: f339a3ef6369 - main - dtrace: remove unnecessary fflush()

From: Mateusz Piotrowski <>
Date: Fri, 11 Feb 2022 12:31:49 UTC
On 10/02/2022 20:32, Chuck Silvers wrote:
> On Thu, Feb 10, 2022 at 02:36:30PM +0100, Mateusz Piotrowski wrote:
>> 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!
> I just looked at top and saw that the CPU usage of the dtrace process
> dropped from 100% to around 13%.  More importantly, when the fflush was
> present dtrace would report that millions of output records were being
> dropped, and after the fflush was removed then dtrace no longer reported
> any dropped output.