A tool has been developed to look at power consumption, PowerTOP:
https://www.redhat.com/archives/fedora-devel-list/2007-May/msg00796.html
I have been able to run it on the XO- beta 2 machine I have. However, the
really
interesting information about power consumption isn't available. The code
Jordan Crouse wrote:
On 14/05/07 12:20 -0400, William Cohen wrote:
interesting information about power consumption isn't available. The code
attempts to read the ACPI information (/proc/acpi/processor/) for C state
information. Is there some other place that this type of information would
William Cohen wrote:
snip
Setup of SystemTap on OLPC Machine
To run systemtap kernel modules on olpc machine the hacked
systemtap-runtime
module needs to be installed on the olpc machine:
rpm -Uvh systemtap-runtime-0.5.12-1olpc.i386.rpm
The instrumentation needs to be run as root
Jim Gettys wrote:
Heh. More and more cursors are images these days, rather than two
plane. The question is if we hit the hardware alpha blending unit for
cursors or not. I'd suspect not, but profiling would provide the answer
if you don't know instantly...
-
Marco Pesenti Gritti wrote:
On Mon, 2007-04-09 at 18:53 -0400, William Cohen wrote:
Hi all,
I was taking a closer look at where the startup time was spent when starting
the
web browser activity. The profile from python profiler looks like the
following:
import pstats
p = pstats.Stats
Hi all,
I was taking a closer look at where the startup time was spent when starting
the
web browser activity. The profile from python profiler looks like the
following:
import pstats
p = pstats.Stats('/tmp/pywebprof')
p.sort_stats('time').print_stats(10)
Mon Apr 9 18:19:30 2007
William Cohen wrote:
According to the profile the import hippo is taking a couple of
seconds. I tried it from an interactive python command line and it does
seems to take a while (2 or 3 seconds). Why does the import take so long?
Where is the code for browser_startup, main and present
I have been thinking about the little XO people that are used to show who is
connected in the neighbor hood. The only aspect of them that can be changed is
color. Given that the screen works in both color and black and white, it will be
very hard to distiguish between different people in the
I was running a simple script iotime.stp on the 314 build. The script monitors
the reads and write performed by the systemt. When the process does the close it
prints a summary: a time stamp in microseconds, pid, process name, type of
information (number of accesses or amount of time), the file
Jim Gettys wrote:
On Wed, 2007-03-28 at 21:49 -0500, Gopi Palaniappan wrote:
Hi:
[...]
2. What kind of sleep modes does it support?
Suspend to RAM.
But we can leave the display image intact on the screen, and the
wireless interface forwarding packets. So the system can appear to be
Marco Pesenti Gritti wrote:
On Thu, 2007-03-29 at 09:43 -0400, William Cohen wrote:
I was running a simple script iotime.stp on the 314 build. The script monitors
the reads and write performed by the systemt. When the process does the close it
prints a summary: a time stamp in microseconds
Ivan Krstić wrote:
Neal Norwitz wrote:
I'm missing a bit of context. Ivan is correct that we probably
wouldn't want an inotify module in the core. However, there can
certainly be a module created to provide access to inotify from
python. I'm not sure what the goal is.
Sorry, I misread
Hi all,
There is a page that describes modifying python scripts to get hotshot profiling
information:
http://wiki.laptop.org/go/Sugar_Performance
The wiki page says that the profile module is depricated. However, it seems
mucheasire to run profile with:
python -m profile -o
Hi all,
I was trying to make sense of the data that I collected earlier with the
idle1.stp probe. It displayed the percentage of time spent in halted mode, which
the highest I saw on an idle machine was 17 percentage. This seemed rather low
for a machine that was doing nothing, so I took a
Jordan Crouse wrote:
On 22/03/07 18:26 +0100, Jens Axboe wrote:
The tickless kernel just _enables_ low number of interrupts per second,
it'll still wakeup everytime something is scheduled to run. So you
probably want to look into _why_ th timer interrupts happen so often -
who is the user of
Chris Ball wrote:
Hi Will,
I need to put a probe at a higher level to see what is run when the
timer fires. Is there something that can print out what is in the
clockevents_chain?
Not sure if you're aware that there are timer statistics available:
Chris,
Thanks for the
Albert Cahalan wrote:
Dan Williams writes:
You may want to update to the Q2B81 firmware which disables the branch
prediction workaround, and yields about 25% performance increase when
using any USB network devices (including the builtin wireless).
Uh, is that safe?
I thought that this was
Experiences Getting SystemTap work on OLPC Machine
Right now the stock Systemtap does not allow cross compiling of
systemtap scripts between different subarchitectures. The stock
systemtap assumes that the host and target systems are the same
subarchitecture. If the host systemtap is a i686
William Cohen wrote:
This particular script attempts to determine the amount of the time
spent in the power saving halted mode. It will run until control-c is
typed on the command line. When control-c is pressed, the script
prints out information about how long it ran, the number of entries
Jim Gettys wrote:
Thank you for your efforts!
On Mon, 2007-03-12 at 16:39 -0400, William Cohen wrote:
I have been successful in getting OProfile in timer mode to work on a OLPC Beta
2 machine. Would it be worthwhile to build the OProfile module in the kernel
build?
Yes.
Could we turn
Carl Worth wrote:
[Pardon me for quoting several separate messages in a single reply
here---I wasn't previously on this list, and it's difficult enough to
fish out the Message-ID of a single message to try to get a properly
formatted reply.]
On Mon, 2007-02-12, William Cohen wrote:
samples
Looked at where the processor spends its time when browsing the web.
Hardware configuration:
OLPC Beta 2 machine
Linksys USB200M USB 10/100 for ethernet connection
4GB memorex Mini Travel Drive for storage of image
Software configuration:
William Cohen wrote:
Looked at where the processor spends its time when browsing the web.
Hardware configuration:
OLPC Beta 2 machine
Linksys USB200M USB 10/100 for ethernet connection
4GB memorex Mini Travel Drive for storage of image
Software configuration:
/tmp/olpc-redhat-stream
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