Date: Thu, 29 Nov 2007 11:06:04 -0800 From: "Matt Reimer" <mattjreimer@gmail.com> To: "Kris Kennaway" <kris@freebsd.org> Cc: freebsd-stable@freebsd.org, Pete French <petefrench@ticketswitch.com> Subject: Re: Also seeing 2 x quad-core system slower that 2 x dual core Message-ID: <f383264b0711291106x4b431cbaj56967bb4b8762408@mail.gmail.com> In-Reply-To: <474F0BDF.8070605@FreeBSD.org> References: <E1IxklH-000ElU-3w@dilbert.ticketswitch.com> <474F0BDF.8070605@FreeBSD.org>
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On Nov 29, 2007 10:58 AM, Kris Kennaway <kris@freebsd.org> 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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