On Fri, 2003-11-14 at 08:41, Takeshi Sone wrote: > On Fri, Nov 14, 2003 at 08:26:55AM +0100, Svante Signell wrote: > > For the erroneous motherboard with a 1.3GHz Tualatin CPU the numbers are > > around 400ns independent of array size. The only thing changig is that > > the latency numbers increase to 440-460ns for large values of the > > stride. My interpretation is that not even the L1 cache is working > > properly. All other tests indicate a _very_ slow CPU, around 7MHz is > > measured by lmbench (BTW how good is this value?) compared to the > > expected 1.3GHz. Two questions immediately arise. > > > > 1. Is this slowness reasonable if _no- caches are working properly? > > 2. If there is a problem with the on-chip voltage regulator and the CPU > > clock speed is really 7MHz, as measured by lmbench, can the CPU operate > > properly at this low speed. I thought there was a _lower_ limit as well > > as an upper limit for the operating frequency? > > What do these commands say? > > cat /proc/mtrr > cat /proc/cpuinfo Normal output: 1.4GHz Tualatin cat/proc/mtrr: reg00: base=0x00000000 ( 0MB), size= 256MB: write-back, count=1 reg01: base=0xe4000000 (3648MB), size= 8MB: write-combining, count=1
# Faulty system: cat /proc/mtrr cat: /proc/mtrr: No such file or directory Faulty system: $ cat /proc/cpuinfo processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 11 model name : Intel(R) Celeron(TM) CPU 1300MHz stepping : 4 cpu MHz : 1340.197 cache size : 256 KB fdiv_bug : no hlt_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 2 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 mmx fxsr sse bogomips : 2641.10 _______________________________________________ Linuxbios mailing list [EMAIL PROTECTED] http://www.clustermatic.org/mailman/listinfo/linuxbios
