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On 22/11/10 05:19, Christopher Samuel wrote:
> Good catch - it exists but it is empty.
Still puzzled about why lstopo works reading this data
on an x86-64 laptop but not on the system itself so I
did a bit of poking with strace -e openat,faccessat to
see if I could see where it was diverging.
Here's what happens on the laptop:
faccessat(3, "sys/devices/system/cpu/cpu0/topology", R_OK) = -1 ENOENT
(No such file or directory)
openat(3, "proc/cpuinfo", O_RDONLY) = 4
openat(3, "proc/device-tree/cpus", O_RDONLY|O_DIRECTORY) = 4
openat(3, "proc/device-tree/cpus/l2-cache@2000/device_type", O_RDONLY) = 5
openat(3, "proc/device-tree/cpus/l2-cache@2000/reg", O_RDONLY) = 5
openat(3, "proc/device-tree/cpus/l2-cache@2000/l2-cache", O_RDONLY) = 5
openat(3, "proc/device-tree/cpus/l2-cache@2000/ibm,phandle", O_RDONLY) = 5
Here's what happens on the PPC64 box:
faccessat(3, "sys/devices/system/cpu/cpu0/topology", R_OK) = -1 ENOENT
(No such file or directory)
openat(3, "proc/cpuinfo", O_RDONLY) = 4
openat(3, "proc/device-tree/cpus", O_RDONLY|O_DIRECTORY) = 4
openat(3, "sys/class/dmi/id/product_name", O_RDONLY) = -1 ENOENT (No
such file or directory)
openat(3, "sys/class/dmi/id/product_version", O_RDONLY) = -1 ENOENT (No
such file or directory)
openat(3, "sys/class/dmi/id/product_serial", O_RDONLY) = -1 ENOENT (No
such file or directory)
openat(3, "sys/class/dmi/id/product_uuid", O_RDONLY) = -1 ENOENT (No
such file or directory)
openat(3, "sys/class/dmi/id/board_vendor", O_RDONLY) = -1 ENOENT (No
such file or directory)
I'll try applying the same patch to the x86-64 build and doing
a --enable-debug build there and compare them.
cheers,
Chris
- --
Christopher Samuel - Senior Systems Administrator
VLSCI - Victorian Life Sciences Computational Initiative
Email: sam...@unimelb.edu.au Phone: +61 (0)3 903 55545
http://www.vlsci.unimelb.edu.au/
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