Comment 96 for bug 217580

top-firefox-scrolling.log

2009/5/2 Stefano Doni <email address hidden>

> top-idle.log
>
> 2009/5/2 Stefano Doni <email address hidden>
>
> Here's some hard performance data.
>>
>> I've measured Xorg and firefox CPU consumption in two scenarios:
>>
>> 1) System completely idle
>> 2) Firefox open on gmail, only 1 tab, no firefox extensions, scrolling
>> down this launchpad thread fully expaned with mouse wheel.
>>
>> In both cases I've recorded CPU utilization, 10 top recordings every 5
>> seconds each of the two processes. Command line:
>>
>> top -b -n 10 -d 5 -p $(pidof firefox),$(pidof X)
>>
>> I'm attaching the two top logs. Two noteworthy things to point out:
>>
>> 1) CPU fully saturated (constantly 100%) when scrolling in gmail!
>> 2) Process responsible for this is Xorg!
>>
>> See the attached logs. One important thing: I'm using nouveau now in
>> Jaunty. Later I'll redo the recordings with nv and possibily NVIDIA closed
>> drivers. I don't think it is a matter of driver though, I've opened this
>> slowness bug when I was using Intrepid with nv and the situation was the
>> same.
>>
>> Now, next step could be to profile the driver and see where the time is
>> spent. Anyone willing to dive into this with me? I'm willing to profile this
>> workload, if someone can guide me.
>>
>> 2009/5/1 phinn <email address hidden>
>>
>> Because it's not entirely an Nvidia bug either. My IBM T60 laptop draws
>>> Firefox pages perfectly smooth with crappy ATI X1400 card compared to my
>>> high end PC, its ridiculous. However, If you try Opera or Webkit based
>>> browsers in Linux this problem does not occur. It is only between
>>> Firefox + Nvidia.
>>>
>>> Yea, there should be some kind of bug report filled with Nvidia for sure
>>> though. As both Firefox and them are to blame.
>>>
>>> --
>>> Slow performance with Gmail
>>> https://bugs.launchpad.net/bugs/217580
>>> You received this bug notification because you are a direct subscriber
>>> of the bug.
>>>
>>> Status in XUL + XPCOM application runner: Confirmed
>>> Status in “firefox-3.0” source package in Ubuntu: Invalid
>>> Status in “xulrunner-1.9” source package in Ubuntu: Fix Committed
>>>
>>> Bug description:
>>> Binary package hint: firefox-3.0
>>>
>>> When scrolling in Gmail (and other websites however its not as noticable)
>>> the scrolling performance is terrible. There is a slight lag from when it
>>> starts to scroll to when it actually does scroll. On my Windows XP machine
>>> it is MUCH faster (basically instant). This is present with both Compiz
>>> enabled and disabled.
>>>
>>> ProblemType: Bug
>>> Architecture: i386
>>> Date: Tue Apr 15 01:01:46 2008
>>> DistroRelease: Ubuntu 8.04
>>> NonfreeKernelModules: nvidia
>>> Package: firefox-3.0 3.0~b5+nobinonly-0ubuntu1
>>> PackageArchitecture: i386
>>> ProcEnviron:
>>>
>>> PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games
>>> LANG=en_US.UTF-8
>>> SHELL=/bin/bash
>>> SourcePackage: firefox-3.0
>>> Uname: Linux 2.6.24-16-generic i686
>>>
>>
>>
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