New WU's running slowww on my Opty 2218
30 Sep 2007 11:48:01 UTC
Topic 193185
(moderation:
The new strain of wu's are processing fine on all of my systems except for one.
Average times are around 10 hours.
Even my Opteron 1218 is around 10 hours-ish.
Except for this one at 30 hours.
Dual Opteron 2218, Asus L1N64 mobo
BOINC benchmarks are the same Dhrystones 2900 Whetstones 5400 for the Opty 1218 and the Opty 2218
I updated the bios to 505 and re-installed the chipset drivers...still no improvement.
any idea's ?
New WU's running slowww on my Opty 2218
)
Hi!
Your S5R3 results do not yet show up in your stats, I guess they are not reported yet. Anyway, that host did have a few Compute Errors in S5R2. Another thing: S5R3 might require higher memory bandwidth than S5R2 (more a speculation than a fact right now, tho) so on a 4 core system this might be an issue if the memory is not the fastest.
Just for a test drive, you could try to limit BOINC to using only 2 CPUs (cores) on your machine. I think there is a local preferences override in the newest BOINC managers that allow you to do that without affecting other hosts. Alternatively, configure your Einstein@Home preferences to use only 2 CPUs for computers in a special Location (you can choose location profiles work, school, home) and associate the Opteron in question with this location profile.
If the crunching performance goes up significantly when you are running E@H only on 2 of the 4 cores, then you probably have a memory bottleneck situation.
Hope this helps,
H-BE
M,y own Opteron 285 ran
)
M,y own Opteron 285 ran 76,111 seconds for a 0518.05 WU on S5R2
On S5R3 the same 0518.05 WU batch runs between 60,600 to 66,500 seconds.
So running at 2.77 to 4.44 hours faster but giving far less cobblestones dropping me from over 21 an hour to 12.5 an hour.
This is on Linux, I think Windows machine are now faster than Linux on Einstein under S5R3.
RE: M,y own Opteron 285 ran
)
In fact, that is the case. My AMD 6000+ machine, running Linux, is now only marginally faster than my AMD 3500+ machine that's running WindowsXP. With the S5R2 workunits, the 6000+ used to be roughly twice as fast.
Anyway, you'll find more details in this thread.