Re: Giving developers clue how many testers verified certain kernelversion

From: Alejandro Bonilla
Date: Fri Jul 22 2005 - 22:40:47 EST


Lee Revell wrote:

On Fri, 2005-07-22 at 21:15 -0500, Alejandro Bonilla wrote:


OK, I will, but I first of all need to learn how to tell if benchmarks are better or worse.



Con's interactivity benchmark looks quite promising for finding
scheduler related interactivity regressions. It certainly has confirmed
what we already knew re: SCHED_FIFO performance, if we extend that to
SCHED_OTHER which is a more interesting problem then there's serious
potential for improvement. AFAIK no one has posted any 2.4 vs 2.6
interbench results yet...


I will give it a try.

I suspect a lot of the boot time issue is due to userspace. But, it
should be trivial to benchmark this one, just use the TSC or whatever to
measure the time from first kernel entry to execing init().


You got it! As a laptop user, I think it just takes too much more. I think it is maybe hotplugs fault with the kernel? I don't know how much is done by the kernel or userspace but it definitely takes longer.

I could do some sort of benchmarks, but believe me, I hate to say this, but I use 2.6 because of much more power managements features in it. Else I like 2.4 a lot more. Is like, the feels is sharper. Sometimes when I got into a tty1, it takes some time after I put my username in to prompt me for a password. This does not occur when I boot with 2.4.27. Strange huh?

I don't want to be an ass and say that 2.4 is better, instead I want to help and let determine why is it that I feel 2.6 slower.

.Alejandro

Lee





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