A new application has been uploaded:
1) this application has drastically reduced CPU-usage
2) it reports the time per step in output, as now the cputime is not anymore a good estimate of elapsed time.

unless I am mistaken, we need the new client for BOTH Linux and Windows to not need the CPU to run a WU....

unless I am mistaken, we need the new client for BOTH Linux and Windows to not need the CPU to run a WU....

What do yo mean? The time that is shown in BOINC manager?

It is not. Right now the process is consuming only 7-8% CPU load on my C2D E7200@3,4GHz and the process took almost 5 minutes of CPU time up to now. But the progress is already at 8.x% That would give a calculation time of roughly one hour. While my CPU time was around 12hours for one unit before, this fits together.

Nice job GDF! Now we are only lacking BOINC 6.3.11, which lets us use the spare 90% of the CPU time. Woohoo, I'm so much looking forward to it =)

On the clock at my wall it will still take 12 hours, but when the process ends it has collected only ~1hour of CPU time. I think the same time will be displayed in each WUs listing on the web page.

This should be the reason for the new feature 2 which GDF describes...

2) it reports the time per step in output, as now the cputime is not anymore a good estimate of elapsed time.

Linux box results:

Boinc 6.3.8
177.13 driver
Ubuntu 64
8800GS no OC

http://www.ps3grid.net/result.php?resultid=56032

____________


Consciousness: That annoying time between naps......

Experience is a wonderful thing: it enables you to recognize a mistake every time you repeat it.

Like other users reported it for the Windows app, I see pretty different CPU times on my two Linux 64 boxes.

The one with CentOS 5.2, and the 9800GTX uses about 2550 CPU seconds per WU. That's pretty the same CPU usage on every WU.

The other one with Ubuntu 7.10 and a 8800GT is using between 99 and 55 CPU seconds per WU which is a really big difference compared to the CentOS host...

It doesn't really fit in the Linux thread, but on the Vista computer I noticed that the application is also using approximately 2500 CPU seconds per WU on a GTX 260.

So why is the Ubuntu box using much less of the CPU than the CentOS and Vista box?
Both Linux computers are full time crunchers without keyboard, mouse and monitor attached and are not used for anything else than crunching, and both use the same drivers (177.67 for Linux64). Both Linux boxes have a Q6600 CPU, both sligtly ocerclocked to 2.6 Ghz, both have DDR2 800 RAM, the only difference is that the CentOS box (the one which uses more CPU time) has 4 GB RAM and the other one only 2 GB.
____________

pixelicious.at - my little photoblog

My Linux box with 8800GT reports more or less the same time per step that yours do.

I have a server 2008 x64 box if you need some help testing.

On my Linux box
# Device 0: "GeForce 8800 GT"
# Clock rate: 1512000 kilohertz
MDIO ERROR: cannot open file "restart.coor"
# Time per step: 70.266 ms

So, the new application takes exactly as before, as I knew the performance before. We will test on Windows vista in the next few days.

You must be comparing previous cpu time with current elapsed time. As the cpu was really doing nothing even before, it is likely that 1 h cpu time corresponds to 1.1 hours elapsed time.

GDF

It is possible that faster cards as yours suffers more with the new app. Could you try to run with just 3 other jobs to see if the GPU time reduces?

gdf