Charles:
If this program is ready for public use, we could list it here:
http://boinc.berkeley.edu/addons.php
-- David
On 09-Jul-2013 4:15 AM, Charles Elliott wrote:
Three of my computers are in a small second floor bedroom with an asphalt
roof and a box fan placed in a window close to the ground for its only
ventilation. During the afternoons room temperatures are 95 F or higher,
too much for the computers.
If heat is the problem, it makes more sense to measure CPU/GPU temperatures
and reduce the load on a device if the temperature rises above a set point,
and increase it if the temps go below a lower set point.
I wrote a Java program that does exactly that. It accesses temperatures by
parsing a SpeedFan logging file on each computer, and affects Boinc by
changing the <ncpus>N</ncpus> line in cc_config.xml and issuing a
<read_cc_config> RPC. Something similar might be possible for the GPUs.
It seems to work. Yesterday, its first day of operation, during the
afternoon it lowered the CPUs used of the three computers from 8 to 6, and
then last night, starting about 10:30, it slowly raised them back to 8,
where it is now.
Charles Elliott
-----Original Message-----
From: boinc_dev [mailto:boinc_dev-boun...@ssl.berkeley.edu] On Behalf
Of McLeod, John
Sent: Monday, July 8, 2013 11:21 AM
To: David Anderson; boinc_dev@ssl.berkeley.edu
Subject: Re: [boinc_dev] CPU throttling and GPU apps
How about changing it to not throttle apps that use less than the
current throttling value? E.g. if throttling is set at .9, don't
throttle a task that uses .8.
-----Original Message-----
From: boinc_dev [mailto:boinc_dev-boun...@ssl.berkeley.edu] On Behalf
Of David Anderson
Sent: Friday, July 05, 2013 11:50 PM
To: boinc_dev@ssl.berkeley.edu
Subject: Re: [boinc_dev] CPU throttling and GPU apps
I changed it not throttle apps that use < .5 CPUs
-- David
On 04-Jul-2013 2:38 PM, Eric J Korpela wrote:
The only pro I can think of would be to reduce GPU use to keep
temperature or power use down, but that would be better implemented
as
GPU throttling.
On Thu, Jul 4, 2013 at 5:52 AM, Bernd Machenschalk
<bernd.machensch...@aei.mpg.de> wrote:
On 04.07.13 13:15, Heinz-Bernd Eggenstein wrote:
I guess there are several pros and cons, e.g.:
cons:
- one one hand, GPU apps (depending on the CPU share?) get a
higher OS
prio (in terms of "niceness") to prevent the GPU being starved.
Throttling
the CPU might very well cause this starvation
- if a GPU app has a rather low CPU runtime share in the first
place,
further CPU throttling does not seem too useful.
- in order to avoid GPU load to interfere with the user doing
non-BOINC
related stuff, there is already the setting "Suspend GPU work while
computer is in use".
Here's one more:
When not synchronized with GPU-CPU communication (kernel launches,
data
transfer) throtteling an App can break any running GPU task. I'm not
sure
whether the throtteling implementations of all BOINC Clients that
are being
used properly honor critical sections, nor am I that all GPU apps of
all
projects make proper use of these.
pros:
I can't think about many
Actually I can't think about any.
Best,
Bernd
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