Try running
perl -e 'while(1) { $a++ }'
In one window on that system, and look at /proc/cpuinfo in another.
You'll probably find that the CPU speed ramps up on at least one, if not
all, of the cores to full speed. If you have TurboBoost enabled, you
may even see some CPUs exceed the frequency in the model string.
AMD processors do not include the frequency in the model string at all:
processor : 11
vendor_id : AuthenticAMD
cpu family : 16
model : 8
model name : Six-Core AMD Opteron(tm) Processor 2431
stepping : 0
cpu MHz : 2394.001
Paul Krizak 7171 Southwest Pkwy MS B200.3A
MTS Systems Engineer Austin, TX 78735
Advanced Micro Devices Desk: (512) 602-8775
Linux/Unix Systems Engineering Cell: (512) 791-0686
Global IT Infrastructure Fax: (512) 602-0468
On 05/31/2011 12:47 PM, nodata wrote:
On 31/05/11 18:40, Win Htin wrote:
Hi folks,
When I do cat /proc/cpuinfo on my IBM HS-22 blade servers I see:
model name : Intel(R) Xeon(R) CPU X5670 @ 2.93GHz
compare the last number on that line
cpu MHz : 1596.000
with the current speed on this line
where as on the older HS-21 servers I see:
model name : Intel(R) Xeon(R) CPU E5440 @ 2.83GHz
cpu MHz : 2833.505
Why do I see the cpu MHz to be a lot less on the HS-22 than what the
model name info represents? Any ideas?
Thanks in advance.
Win
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