Date: Wed, 28 Apr 2010 09:22:03 +0100 From: krad <kraduk@googlemail.com> To: John <john@starfire.mn.org> Cc: Neil Short <neshort@yahoo.com>, freebsd-questions@freebsd.org Subject: Re: Improving SMP performance? Message-ID: <t2gd36406631004280122hc88a2314j1742b8b07b0dfef7@mail.gmail.com> In-Reply-To: <20100428032228.GA96137@elwood.starfire.mn.org> References: <535299.10507.qm@web56507.mail.re3.yahoo.com> <20100428032228.GA96137@elwood.starfire.mn.org>
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On 28 April 2010 04:22, John <john@starfire.mn.org> wrote: > On Tue, Apr 27, 2010 at 05:32:58PM -0700, Neil Short wrote: > > I'm somewhat disappointed in the performance in my laptop which is > supposed to have a really fast processor. Is there some way to get more out > of the processor? > > > > > > [neshort/] uname -a > > FreeBSD carmen 8.0-STABLE FreeBSD 8.0-STABLE #1: Thu Apr 15 19:54:24 MST > 2010 neshort@carmen:/usr/obj/usr/src/sys/CARMEN i386 > > [neshort/] dmesg > > ... > > Timecounter "i8254" frequency 1193182 Hz quality 0 > > CPU: Intel(R) Core(TM) i3 CPU M 330 @ 2.13GHz (2127.92-MHz > 686-class CPU) > > Origin = "GenuineIntel" Id = 0x20652 Family = 6 Model = 25 Stepping > = 2 > > > 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=0x98e3bd<SSE3,DTES64,MON,DS_CPL,VMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,SSE4.1,SSE4.2,POPCNT> > > AMD Features=0x28000000<RDTSCP,LM> > > AMD Features2=0x1<LAHF> > > TSC: P-state invariant > > real memory = 4294967296 (4096 MB) > > avail memory = 3066707968 (2924 MB) > > ACPI APIC Table: <HPQOEM SLIC-MPC> > > FreeBSD/SMP: Multiprocessor System Detected: 4 CPUs > > FreeBSD/SMP: 1 package(s) x 2 core(s) x 2 SMT threads > > cpu0 (BSP): APIC ID: 0 > > cpu1 (AP): APIC ID: 1 > > cpu2 (AP): APIC ID: 4 > > cpu3 (AP): APIC ID: 5 > > > > > > ====== > > > > "What did you do?" the man holding the flashlight asked. > > > > "I put down a spider," he said, wondering why the man didn't see; in the > beam of yellow light the spider bloated up larger than life. "So it could > get away." > > > > In what way are you disappointed? It may be SMP, but for any single > thread, it cannot go faster than one of the processors. If you are > measuring a single-threaded task, that's all you can get. Or could > it be that IO is limiting your performance? Without knowing what > it is you want to do, and what you are experiencing, it is very hard > to know how to help you. If you are just looking at the clock speed, > please understand that CPU manufacturers lately are working to LOWER > clocks speeds because it saves power, and to speed up the processors > by using wider microinstructions and more sophisticated pipelining > techniques to gain speed without just wiggling things at a higher > frequency. > -- > > John Lind > john@starfire.MN.ORG > _______________________________________________ > freebsd-questions@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to " > freebsd-questions-unsubscribe@freebsd.org" > put a 64bit os on for one, you would see all your 4g ram then
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