[email protected] wrote:
On Wednesday 21 September 2005 16:20, [email protected] wrote:
Hello,
I noticed that the bogomips results for the two cores on my machine are
consistently not the same, the second one is always reported slightly
faster, it's a small difference and I saw the same in a posted dmesg
from
somebody else on the list. Which made me wonder:
I guess it's a cache warming effect. Please show the numbers.
--
vda
Probably not, got this one from a web site, and on this one the first core
seems to be faster (can't check my own machine it's off and at home and
I'm at work.) The difference I get is similar, but always with the second
one faster. It's the same when using cat on /proc/cpuinfo. Oh and I saw it
on 2.6.11 and 2.6.12 as supplied with fedora core 4 myself.
Calibrating delay using timer specific routine.. 4014.73 BogoMIPS
(lpj=8029470)
Mount-cache hash table entries: 512
CPU: L1 I Cache: 64K (64 bytes/line), D cache 64K (64 bytes/line)
CPU: L2 Cache: 512K (64 bytes/line)
CPU 0(2) -> Core 0
Intel machine check architecture supported.
Intel machine check reporting enabled on CPU#0.
mtrr: v2.0 (20020519)
Enabling fast FPU save and restore... done.
Enabling unmasked SIMD FPU exception support... done.
Checking 'hlt' instruction... OK.
CPU0: AMD Athlon(tm) 64 X2 Dual Core Processor 3800+ stepping 02
Booting processor 1/1 eip 2000
Initializing CPU#1
Calibrating delay using timer specific routine.. 4005.37 BogoMIPS
(lpj=8010751)
CPU: L1 I Cache: 64K (64 bytes/line), D cache 64K (64 bytes/line)
CPU: L2 Cache: 512K (64 bytes/line)
CPU 1(2) -> Core 1
Intel machine check architecture supported.
Intel machine check reporting enabled on CPU#1.
CPU1: AMD Athlon(tm) 64 X2 Dual Core Processor 3800+ stepping 02
Total of 2 processors activated (8020.11 BogoMIPS).
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opposite result here - 2nd one is faster (from /proc/cpuinfo):
processor : 0
vendor_id : AuthenticAMD
model name : AMD Athlon(tm) 64 X2 Dual Core Processor 4400+
cpu MHz : 2211.337
bogomips : 4374.52
...
processor : 1
vendor_id : AuthenticAMD
model name : AMD Athlon(tm) 64 X2 Dual Core Processor 4400+
cpu MHz : 2211.337
...
bogomips : 4407.29
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