This post is more than 5 years old
3 Posts
0
9522
March 5th, 2012 22:00
Poor performance for R910 server
Hi,
I have a R910 server, with E8837 * 4 CPU and 64 G memory (Windows Server 2008 standard can only support 32G),
our application uses Intel IPP package to do some image processing job.
if I bind our application to one of the CPU and run a performance test method, it takes 0.8 second.
if launch 4 copy of our application, bind each copy to one CPU, invokes the test method at the same time, each will take 1.9 second, the time is doubled
4 application only uses 10G memory, why it's so slow when run the same method?
the hardware seems is OK after tested by Dell_DSET, so what causes the delay??
|
| Status |
Connector Name |
Processor Brand |
Processor Version |
Current Speed |
State |
Core Count |
||||||
| Intel(R) Xeon(R) CPU E7- 8837 @ 2.67GHz |
Model 47 Stepping 2 |
2666 MHz |
Present |
8 |
||||||||
| Intel(R) Xeon(R) CPU E7- 8837 @ 2.67GHz |
Model 47 Stepping 2 |
2666 MHz |
Present |
8 |
||||||||
| Intel(R) Xeon(R) CPU E7- 8837 @ 2.67GHz |
Model 47 Stepping 2 |
2666 MHz |
Present |
8 |
||||||||
| Intel(R) Xeon(R) CPU E7- 8837 @ 2.67GHz |
Model 47 Stepping 2 |
2666 MHz |
Present |
8 |
| DIMM A1 |
28711928 |
NT4GC72B4PB0NL-CG |
N/A |
Nanya Technology (830B04B3830B) |
Mon May 16 20:00:00 2011 |
|||||
| DIMM A2 |
CE711926 |
NT4GC72B4PB0NL-CG |
N/A |
Nanya Technology (830B04B3830B) |
Mon May 16 20:00:00 2011 |
|||||
| DIMM A3 |
56721926 |
NT4GC72B4PB0NL-CG |
N/A |
Nanya Technology (830B04B3830B) |
Mon May 16 20:00:00 2011 |
|||||
| DIMM A4 |
DC711928 |
NT4GC72B4PB0NL-CG |
N/A |
Nanya Technology (830B04B3830B) |
Mon May 16 20:00:00 2011 |
|||||
| DIMM C1 |
1B72192A |
NT4GC72B4PB0NL-CG |
N/A |
Nanya Technology (830B04B3830B) |
Mon May 16 20:00:00 2011 |
|||||
| DIMM C2 |
A1711926 |
NT4GC72B4PB0NL-CG |
N/A |
Nanya Technology (830B04B3830B) |
Mon May 16 20:00:00 2011 |
|||||
| DIMM C3 |
64721926 |
NT4GC72B4PB0NL-CG |
N/A |
Nanya Technology (830B04B3830B) |
Mon May 16 20:00:00 2011 |
|||||
| DIMM C4 |
6C701928 |
NT4GC72B4PB0NL-CG |
N/A |
Nanya Technology (830B04B3830B) |
Mon May 16 20:00:00 2011 |
|||||
| DIMM E1 |
62711928 |
NT4GC72B4PB0NL-CG |
N/A |
Nanya Technology (830B04B3830B) |
Mon May 16 20:00:00 2011 |
|||||
| DIMM E2 |
81721927 |
NT4GC72B4PB0NL-CG |
N/A |
Nanya Technology (830B04B3830B) |
Mon May 16 20:00:00 2011 |
|||||
| DIMM E3 |
37721927 |
NT4GC72B4PB0NL-CG |
N/A |
Nanya Technology (830B04B3830B) |
Mon May 16 20:00:00 2011 |
|||||
| DIMM E4 |
00711928 |
NT4GC72B4PB0NL-CG |
N/A |
Nanya Technology (830B04B3830B) |
Mon May 16 20:00:00 2011 |
|||||
| DIMM G1 |
49721929 |
NT4GC72B4PB0NL-CG |
N/A |
Nanya Technology (830B04B3830B) |
Mon May 16 20:00:00 2011 |
|||||
| DIMM G2 |
A271192A |
NT4GC72B4PB0NL-CG |
N/A |
Nanya Technology (830B04B3830B) |
Mon May 16 20:00:00 2011 |
|||||
| DIMM G3 |
E9711927 |
NT4GC72B4PB0NL-CG |
N/A |
Nanya Technology (830B04B3830B) |
Mon May 16 20:00:00 2011 |
Hamboney
79 Posts
1
March 8th, 2012 11:00
If you check out the R910 Hardware Owners Manual ( HOM ) from pgs 91 - 107 it lays out the options there.
I am not at site to check out our 910s and there doesn't seem to be a Slot Layout diagram in the manual. So all references indicate the use of memory risers ( which we have ) so the references I include here will also.
For a R910 with 4 CPUs and a RAM BIOS setting of "Power Optimized" ( pg 95 ) using 4x 16 GB DIMMS does not appear to be supported. According to the manual to achieve 64 GB you would need to 4 x 4 GB DIMMs in Riser A of each CPU... If I am reading this right...
To make use of the 16 GB DIMMs your RAM/CPU and Total RAM would need to be 256 GB / CPU for a total of 1024 GB. To achieve this you will also need to be using "Power and Performance Optomized" or "Expandability" memory modes.
Like I said we had a dickens of a time getting a working config for our systems so I would advise you use the HOM to identify the capacity you want and then get the DIMMs indicated for the Memory Mode you wish to run...
"Table 3-2. Memory Configurations (Four Processors)"
* I tried to paste in the table but the formatting went wonky... *
pcmeiners
6 Operator
•
1.8K Posts
0
March 6th, 2012 05:00
If your hardware is optimized, no driver ,firmware issues or incorrect raid parameters....
Not a programer but ran into a somewhat similar situation. If your program is not using fairly recent Windows APIs, it is not optimized to run on multicore or multicpu machines . In my situation, a new fast multicore machine was purchased, the program we have would run 1/4 the speed of an older duo core ; even tried the program on my 4.8 Ghz OCed Intel I7, no difference . We contacted Intel, the tech recompiled the program with the newest APIs and it now runs as it should. Also note, just because you have multi CPUs, do not expect it to run X times faster than the number of CPUs, as I/O in multi/core or multicpu has added overhead. The program with the issue, at least the module we tested with ran in memory, the disk system was not involved past loading into memory.
Hamboney
79 Posts
0
March 6th, 2012 06:00
DELL has some pretty specific memory configurations. Could you please elaborate on how your memory is configured and installed.
OnceLamp
3 Posts
0
March 6th, 2012 17:00
we also worry about the memory configuration, we buy it from an agent company (for a cheaper price....), R910 only has 2 CPUs by deault, they said they install everything by themself....
There are 4 memory module installed at A, E, C and G slote, 16 G for each
how to configure it?
OnceLamp
3 Posts
1
March 11th, 2012 19:00
The manual is helpful.
after I upgrade the OS to 2008 R2 Enterprise, the situation is better.
thanks for the suggestions.