jvonau at shaw.ca
Thu Jul 4 16:13:26 EDT 2013
On Thu, 2013-07-04 at 13:57 -0600, Daniel Drake wrote:
> On Thu, Jul 4, 2013 at 12:48 PM, Yioryos Asprobounitis
> <mavrothal at yahoo.com> wrote:
> > Tried the following little script but I can not find a way to get the output of 'time' command to the output.txt file.
> Not really sure what you are trying to do here - sugar-launch will not
> return until the activity exits.
> I ran a couple of experiments here, with XO-1s running 12.1.0 and 13.2.0.
> Clock (which is a GTK2 activity on both versions) does start 0.5 - 1
> second slower on 13.2.0.
> On 12.1.0 it starts in 10.5 seconds. That is approx 5% change.
> Running under perf, the most noticable difference is that X uses 5% of
> CPU time on 12.1.0, and 10% on 13.2.0. A 5% change.
Of the total available, would that not be a 100% increase in CPU time
used by the process running X?
> Unfortunately perf doesn't tell me which part of X is eating CPU,
> apart from the fact that it is not in the kernel. Need to figure out
> why perf can't be more specific.
> The risk to this work is that we might fix the 5% X issue and see no
> noticable difference. But I will try to continue a bit of
> investigation here next week.
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