FreeBSD 9.1 vs CentOS 6.3

[Jia-Shiun Li]

Hi,

that's ok, just to make sure the spec. Are you running
- a 2-socket Xeon E5-2640 system, and
- not running VM (and assigning only partial CPUs to it)?

It will need someone else having similar machines to help reproduce
it. My guess is some counting bits got overflown, or the CPU topology
reported by the BIOS is too new for 9.1R. And the result is it saw
less CPUs than actual case, and thus gives you worse performance than
you expected.

CC -hackers@ to see if anyone has ideas or access to similar systems.

-Jia-Shiun.


On Mon, Apr 29, 2013 at 8:29 PM, Davide D'Amico
<davide.damico at contactlab.com> wrote:
> Il 29/04/13 14:20, Jia-Shiun Li ha scritto:
>
>> On Fri, Mar 22, 2013 at 5:03 PM, Davide D'Amico
>> <davide.damico at contactlab.com> wrote:
>>>
>>> Hi, I'm doing performance tests on a DELL R720, follows dmesg:
>>>
>>> Copyright (c) 1992-2012 The FreeBSD Project.
>>> Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
>>>          The Regents of the University of California. All rights
>>> reserved.
>>> FreeBSD is a registered trademark of The FreeBSD Foundation.
>>> FreeBSD 9.1-RELEASE #0: Tue Mar 19 10:24:21 CET 2013
>>>      root:/usr/obj/usr/src/sys/R720 amd64
>>> CPU: Intel(R) Xeon(R) CPU E5-2640 0 @ 2.50GHz (2500.05-MHz K8-class CPU)
>>>    Origin = "GenuineIntel"  Id = 0x206d7  Family = 6  Model = 2d Stepping
>>> = 7
>>>
>>> Features=0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE>
>>>
>>> Features2=0x1fbee3ff<SSE3,PCLMULQDQ,DTES64,MON,DS_CPL,VMX,SMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,PCID,DCA,SSE4.1,SSE4.2,x2APIC,POPCNT,TSCDLT,AESNI,XSAVE,OSXSAVE,AVX>
>>>    AMD Features=0x2c100800<SYSCALL,NX,Page1GB,RDTSCP,LM>
>>>    AMD Features2=0x1<LAHF>
>>>    TSC: P-state invariant, performance statistics
>>> real memory  = 34359738368 (32768 MB)
>>> avail memory = 33027436544 (31497 MB)
>>> Event timer "LAPIC" quality 600
>>> ACPI APIC Table: <DELL   PE_SC3  >
>>> FreeBSD/SMP: Multiprocessor System Detected: 8 CPUs
>>> FreeBSD/SMP: 2 package(s) x 2 core(s) x 2 SMT threads
>>>   cpu0 (BSP): APIC ID:  0
>>>   cpu1 (AP): APIC ID:  1
>>>   cpu2 (AP): APIC ID: 10
>>>   cpu3 (AP): APIC ID: 11
>>>   cpu4 (AP): APIC ID: 32
>>>   cpu5 (AP): APIC ID: 33
>>>   cpu6 (AP): APIC ID: 42
>>>   cpu7 (AP): APIC ID: 43
>>
>>
>>
>> According to CPU model you appear to have a system w/ 2 CPU packages x
>> 6-core x 2-thread, which should be 12C/24T total. But it appears 9.1R
>> only recognized 4C/8T. It does not look like a VM. Could you confirm?
>> If it is really so 9.1R and your BIOS may have problem playing well
>> together.
>>
> Sorry, I had to 'reuse' these servers so they are not available for testing
> anymore.
>
> I hope I'll have similar servers in the future.
>
> Best,
> d.
>