Re: Also seeing 2 x quad-core system slower that 2 x dual core

On Nov 29, 2007 10:58 AM, Kris Kennaway <kris@xxxxxxxxxxx> wrote:
Pete French wrote:
On the dual core processors this takes about 20 seconds. On the quad
cores it takes about 3 minutes! This is true for both the 32 and 64 bit
versions of FreeBSD :-(

That almost certainly has nothing to do with how many CPUs your system
has, since rm -rf is a single process running on a single core.

I wonder if I'm seeing this too. Running super-smack on a 2 x quad
core 1.6GHz Dell 1950 I get about 40000 qps, whereas on a 2 x dual
core 3.0GHz box I've seen 80000 qps. Is this expected?

Matt

CPU: Intel(R) Xeon(R) CPU E5310 @ 1.60GHz (1595.94-MHz K8-class CPU)
Origin = "GenuineIntel" Id = 0x6f7 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=0x4e33d<SSE3,RSVD2,MON,DS_CPL,VMX,TM2,SSSE3,CX16,xTPR,PDCM,DCA>
AMD Features=0x20100800<SYSCALL,NX,LM>
AMD Features2=0x1<LAHF>
Cores per package: 4
usable memory = 8577105920 (8179 MB)
avail memory = 8289787904 (7905 MB)

----

CPU: Intel(R) Xeon(R) CPU 5160 @ 3.00GHz (3000.02-MHz K8-class CPU)
Origin = "GenuineIntel" Id = 0x6f6 Stepping = 6
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=0x4e3bd<SSE3,RSVD2,MON,DS_CPL,VMX,EST,TM2,SSSE3,CX16,xTPR,<b15>,DCA>
AMD Features=0x20100800<SYSCALL,NX,LM>
AMD Features2=0x1<LAHF>
Cores per package: 2
usable memory = 17170817024 (16375 MB)
avail memory = 16629559296 (15859 MB)
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