Hello Samuel, Thank you for your quick reply.
I've inlined /proc/cpuinfo at the end of this message. Yes, the cache path you indicated doesn't exist! Is there any reliable alternate way to retrieve cache information (without CPUID) for those older kernels (/proc/cpuinfo only appears to report L3 cache)? Kind regards, Dan processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 26 model name : Intel(R) Xeon(R) CPU X5550 @ 2.67GHz stepping : 5 cpu MHz : 1596.000 cache size : 8192 KB physical id : 16 siblings : 1 core id : 255 cpu cores : 1 fpu : yes fpu_exception : yes cpuid level : 11 wp : yes flags : 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 ht tm syscall nx rdtscp lm pni monitor ds_cpl est tm2 cx16 xtpr popcnt lahf_lm bogomips : 5324.34 clflush size : 64 cache_alignment : 64 address sizes : 40 bits physical, 48 bits virtual power management: processor : 1 vendor_id : GenuineIntel cpu family : 6 model : 26 model name : Intel(R) Xeon(R) CPU X5550 @ 2.67GHz stepping : 5 cpu MHz : 1596.000 cache size : 8192 KB physical id : 18 siblings : 1 core id : 255 cpu cores : 1 fpu : yes fpu_exception : yes cpuid level : 11 wp : yes flags : 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 ht tm syscall nx rdtscp lm pni monitor ds_cpl est tm2 cx16 xtpr popcnt lahf_lm bogomips : 5319.97 clflush size : 64 cache_alignment : 64 address sizes : 40 bits physical, 48 bits virtual power management: processor : 2 vendor_id : GenuineIntel cpu family : 6 model : 26 model name : Intel(R) Xeon(R) CPU X5550 @ 2.67GHz stepping : 5 cpu MHz : 1596.000 cache size : 8192 KB physical id : 20 siblings : 1 core id : 255 cpu cores : 1 fpu : yes fpu_exception : yes cpuid level : 11 wp : yes flags : 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 ht tm syscall nx rdtscp lm pni monitor ds_cpl est tm2 cx16 xtpr popcnt lahf_lm bogomips : 5319.95 clflush size : 64 cache_alignment : 64 address sizes : 40 bits physical, 48 bits virtual power management: processor : 3 vendor_id : GenuineIntel cpu family : 6 model : 26 model name : Intel(R) Xeon(R) CPU X5550 @ 2.67GHz stepping : 5 cpu MHz : 1596.000 cache size : 8192 KB physical id : 22 siblings : 1 core id : 255 cpu cores : 1 fpu : yes fpu_exception : yes cpuid level : 11 wp : yes flags : 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 ht tm syscall nx rdtscp lm pni monitor ds_cpl est tm2 cx16 xtpr popcnt lahf_lm bogomips : 5319.96 clflush size : 64 cache_alignment : 64 address sizes : 40 bits physical, 48 bits virtual power management: processor : 4 vendor_id : GenuineIntel cpu family : 6 model : 26 model name : Intel(R) Xeon(R) CPU X5550 @ 2.67GHz stepping : 5 cpu MHz : 1596.000 cache size : 8192 KB physical id : 0 siblings : 1 core id : 255 cpu cores : 1 fpu : yes fpu_exception : yes cpuid level : 11 wp : yes flags : 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 ht tm syscall nx rdtscp lm pni monitor ds_cpl est tm2 cx16 xtpr popcnt lahf_lm bogomips : 5320.00 clflush size : 64 cache_alignment : 64 address sizes : 40 bits physical, 48 bits virtual power management: processor : 5 vendor_id : GenuineIntel cpu family : 6 model : 26 model name : Intel(R) Xeon(R) CPU X5550 @ 2.67GHz stepping : 5 cpu MHz : 1596.000 cache size : 8192 KB physical id : 2 siblings : 1 core id : 255 cpu cores : 1 fpu : yes fpu_exception : yes cpuid level : 11 wp : yes flags : 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 ht tm syscall nx rdtscp lm pni monitor ds_cpl est tm2 cx16 xtpr popcnt lahf_lm bogomips : 5319.96 clflush size : 64 cache_alignment : 64 address sizes : 40 bits physical, 48 bits virtual power management: processor : 6 vendor_id : GenuineIntel cpu family : 6 model : 26 model name : Intel(R) Xeon(R) CPU X5550 @ 2.67GHz stepping : 5 cpu MHz : 1596.000 cache size : 8192 KB physical id : 4 siblings : 1 core id : 255 cpu cores : 1 fpu : yes fpu_exception : yes cpuid level : 11 wp : yes flags : 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 ht tm syscall nx rdtscp lm pni monitor ds_cpl est tm2 cx16 xtpr popcnt lahf_lm bogomips : 5319.99 clflush size : 64 cache_alignment : 64 address sizes : 40 bits physical, 48 bits virtual power management: processor : 7 vendor_id : GenuineIntel cpu family : 6 model : 26 model name : Intel(R) Xeon(R) CPU X5550 @ 2.67GHz stepping : 5 cpu MHz : 1596.000 cache size : 8192 KB physical id : 6 siblings : 1 core id : 255 cpu cores : 1 fpu : yes fpu_exception : yes cpuid level : 11 wp : yes flags : 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 ht tm syscall nx rdtscp lm pni monitor ds_cpl est tm2 cx16 xtpr popcnt lahf_lm bogomips : 5320.23 clflush size : 64 cache_alignment : 64 address sizes : 40 bits physical, 48 bits virtual power management: -----Original Message----- From: hwloc-users-boun...@open-mpi.org [mailto:hwloc-users-boun...@open-mpi.org] On Behalf Of Samuel Thibault Sent: Thursday, January 28, 2010 9:21 AM To: Hardware locality user list Subject: Re: [hwloc-users] No caches or hiearchy on RHEL 4.7 or 4.8 Dan Eaton, le Thu 28 Jan 2010 08:44:38 -0700, a écrit : > Is this expected behaviour on those Linux versions? I would be surprised if > this was the case, because it's possible to fully reconstruct the hiarachy > from > /proc/cpuinfo alone on them (caches aside). Could you send us that /proc/cpuinfo so we too can have a look? :) About caches, do you have /sys/devices/system/cpu/cpu0/cache directories? IIRC RHEL has old kernels, so I wouldn't be surprised that the information isn't available. You can as well just use the tests/linux/gather-topology.sh script to automatically fetch all the useful files from /proc and /sys Samuel _______________________________________________ hwloc-users mailing list hwloc-us...@open-mpi.org http://www.open-mpi.org/mailman/listinfo.cgi/hwloc-users
cpuinfo
Description: cpuinfo
