[Discuss] Next AMD FX-8120 update

[gaf at blu.org (Jerry Feldman)]

On 03/18/2012 10:06 AM, markw at mohawksoft.com wrote:
> Here is an output from sysbench:
>
> FX-8120:
> markw at snoopy:~$ sysbench --test=cpu --cpu-max-prime=20000 --num-threads=8 run
> sysbench 0.4.12:  multi-threaded system evaluation benchmark
>
> Running the test with following options:
> Number of threads: 8
>
> Doing CPU performance benchmark
>
> Threads started!
> Done.
>
> Maximum prime number checked in CPU test: 20000
>
>
> Test execution summary:
>     total time:                          3.2178s
>     total number of events:              10000
>     total time taken by event execution: 25.7120
>     per-request statistics:
>          min:                                  2.23ms
>          avg:                                  2.57ms
>          max:                                  4.94ms
>          approx.  95 percentile:               2.71ms
>
> Threads fairness:
>     events (avg/stddev):           1250.0000/1.87
>     execution time (avg/stddev):   3.2140/0.00
>
> AMD Phenom(tm) II X4 925 Processor
> markw at huey:~$ sysbench --test=cpu --cpu-max-prime=20000 --num-threads=4 run
> sysbench 0.4.10:  multi-threaded system evaluation benchmark
>
> Running the test with following options:
> Number of threads: 4
>
> Doing CPU performance benchmark
>
> Threads started!
> Done.
>
> Maximum prime number checked in CPU test: 20000
>
>
> Test execution summary:
>     total time:                          8.3527s
>     total number of events:              10000
>     total time taken by event execution: 33.4005
>     per-request statistics:
>          min:                                  3.28ms
>          avg:                                  3.34ms
>          max:                                 10.62ms
>          approx.  95 percentile:               3.35ms
>
> Threads fairness:
>     events (avg/stddev):           2500.0000/35.81
>     execution time (avg/stddev):   8.3501/0.00
>
>
>
>> I finally got my AMD FX-8120 8 core system and have migrated to it. My old
>> system, an AMD Athlon Dual Core, 8G RAM is now powered off waiting for a
>> new job. My initial problem was a bad motherboard and my biggest obstacle
>> to migration was wife and family and the responsibilities there of.
>>
>> So, quick summary:
>> AMD FX-8120 8 core CPU
>> 16 Gig RAM
>> 1TB Boot drive (new)
>> 1.5TB Data drive (removed from previous machine)
>> Ubuntu 12.04
>>
>> My first impression was that it is not much faster than the old Dual Core
>> Athlon when running a single task, but that turned out to be false. It
>> does seem faster than the previous machine. I only have anecdotal
>> information.
>>
>> Does anyone know of a good Linux benchmark?
>>
>> At work we have IBM servers using XEON Westmere processors, running
>> similar clock speeds, the inexpensive AMD calculated SHA1 hashes faster
>> than the XEON. I was surprised.
>>
>> The big win, of course, is multiple processes and threads. With the extra
>> RAM, I am able to create good sized virtual machines with multiple CPUs.
>>
>> The processor itself is interesting. It isn't quite "8" true processors,
>> but it isn't quite as useless as Intel's "Hyperthreaded" cores either. I
>> will need to find time time to really test it.
MArk,
Can you run the same test (1 thread per real core) on the Xeons with
hyperthreading turned off.

-- 
Jerry Feldman <gaf at blu.org>
Boston Linux and Unix
PGP key id:3BC1EB90 
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