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lscpu: don't abort if cache size is unknown 

There are systems where the size file does not exist. Most badly even
lscpu -p would abort allthough it does not use the size:
$ lscpu -p
lscpu: error: cannot open
/sys/devices/system/cpu/cpu0/cache/index0/size: No such file or directory

This patch does not abort in this case and prints "unknown size" in
human-readable case. For examle on this qemu pcc test machine:
$ lscpu
Architecture:          ppc
CPU op-mode(s):        32-bit
Byte Order:            Big Endian
CPU(s):                1
On-line CPU(s) list:   0
Thread(s) per core:    1
Core(s) per socket:    1
Socket(s):             1
Model:                 Power Macintosh
BogoMIPS:              33.25
L1d cache:             unknown size
L1i cache:             unknown size

Signed-off-by: Ruediger Meier <ruediger.meier@ga-group.nl>
This commit is contained in:
Ruediger Meier 2014-03-26 22:18:17 +01:00
parent 9c72131065
commit 10d927ab3b
1 changed files with 7 additions and 4 deletions
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11
sys-utils/lscpu.c
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@ -897,10 +897,13 @@ read_cache(struct lscpu_desc *desc, int idx)
ca->name = xstrdup(buf);
/* cache size */
path_read_str(buf, sizeof(buf),
_PATH_SYS_CPU "/cpu%d/cache/index%d/size",
num, i);
ca->size = xstrdup(buf);
if (path_exist(_PATH_SYS_CPU "/cpu%d/cache/index%d/size",num, i)) {
path_read_str(buf, sizeof(buf),
_PATH_SYS_CPU "/cpu%d/cache/index%d/size", num, i);
ca->size = xstrdup(buf);
} else {
ca->size = xstrdup("unknown size");
}
}
/* information about how CPUs share different caches */