On Sun, 13 Jul 2008, Nate Eldredge wrote:
On Sun, 13 Jul 2008, Kris Kennaway wrote:
Nate Eldredge wrote:
On Sun, 13 Jul 2008, Kris Kennaway wrote:
Nate Eldredge wrote:
Hi folks,
Hopefully this is a good list for this topic.
It seems like there has been a regression in interactivity from
6.3-RELEASE to 7.0-RELEASE when using the SCHED_4BSD scheduler. After
upgrading my single-cpu amd64 box, 7.0 has much worse latency. When
running a kernel compile, there is a noticeable lag to echo my typing or
scroll my browser windows, and playing an mp3 frequently cuts out for a
second or two. This did not happen on 6.3-RELEASE.
Are you sure it's not the x.org server bug that was present in the
version shipped with 7.0? Update to the latest version and see if your X
interactivity improves.
Yes, I had not yet upgraded my x.org port when testing this, so it was the
same x.org that was fine under 6.3. Also:
I wrote a small program which forks two processes that run
gettimeofday() in a tight loop to see how long they get scheduled out.
On 6.3 the maximum latency is usually under 100 ms. On 7.0 it is 500 ms
or more even when nothing else is running on the system. When a compile
is also running it is sometimes 1400 ms or more.
This test shows a difference even in single user mode, when X is not
running at all.
It shows *a* difference, but perhaps not the *same* difference. Please
humour me and rule it out.
Okay. I am in the process of recompiling all my ports, so after that is done
I will boot with a GENERIC kernel and see what happens.
After trying this, I can't seem to reproduce the sound skipping behavior,
unless I do something fairly extreme like "make -j 6". But the mouse does
seem to skip when a compile is running, so I do believe there is a
regression.
--
Nate Eldredge
[EMAIL PROTECTED]
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