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lscpu: Add shared cached info for s390 lscpu -C 

The shared cache info for s390 can be found in /proc/cpuinfo.
lscpu without any options already processes this info. Fix this
in lscpu -C and provide detailed stat.

Test for s390:
./lscpu -C
NAME ONE-SIZE ALL-SIZE WAYS TYPE        LEVEL  SETS PHY-LINE COHERENCY-SIZE
L1d      128K     256K    8 Data            1    64                     256
L1i      128K     256K    8 Instruction     1    64                     256
L2d        4M       8M    8 Data            2  2048                     256
L2i        2M       4M    8 Instruction     2  1024                     256
L3       128M            32 Unified         3 16384                     256
L4       672M            42 Unified         4 65536                     256

Signed-off-by: Sumanth Korikkar <sumanthk@linux.ibm.com>
This commit is contained in:
Sumanth Korikkar 2020-06-05 18:15:10 +02:00 committed by Karel Zak
parent 9147d2ad8a
commit 318542e060
1 changed files with 109 additions and 76 deletions
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41
sys-utils/lscpu.c
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@ -319,7 +319,7 @@ lookup_cache(char *line, struct lscpu_desc *desc)
struct cpu_cache *cache;
long long size;
char *p, type;
int level;
int level, line_size, associativity;
/* Make sure line starts with "cache<nr> :" */
if (strncmp(line, "cache", 5) != 0)
@ -350,6 +350,14 @@ lookup_cache(char *line, struct lscpu_desc *desc)
if (!p || sscanf(p, "size=%lld", &size) != 1)
return 0;
p = strstr(line, "line_size=");
if (!p || sscanf(p, "line_size=%u", &line_size) != 1)
return 0;
p = strstr(line, "associativity=");
if (!p || sscanf(p, "associativity=%u", &associativity) != 1)
return 0;
desc->necaches++;
desc->ecaches = xrealloc(desc->ecaches,
desc->necaches * sizeof(struct cpu_cache));
@ -363,6 +371,11 @@ lookup_cache(char *line, struct lscpu_desc *desc)
cache->level = level;
cache->size = size * 1024;
cache->ways_of_associativity = associativity;
cache->coherency_line_size = line_size;
/* Number of sets for s390. For safety, just check divide by zero */
cache->number_of_sets = line_size ? (cache->size / line_size): 0;
cache->number_of_sets = associativity ? (cache->number_of_sets / associativity) : 0;
cache->type = type == 'i' ? xstrdup("Instruction") :
type == 'd' ? xstrdup("Data") :
@ -1673,8 +1686,25 @@ print_caches_readable(struct lscpu_desc *desc, int cols[], int ncols,
err(EXIT_FAILURE, _("failed to allocate output column"));
}
for (i = desc->ncaches - 1; i >= 0; i--) {
struct cpu_cache *ca = &desc->caches[i];
struct cpu_cache *ca, *cachesrc;
int end, j, shared_allsize;
for (j = 0; j < 2; j++) {
/* First check the caches from /sys/devices */
if (j == 0) {
cachesrc = desc->caches;
end = desc->ncaches - 1;
shared_allsize = 0;
}
else {
/* Check shared caches from /proc/cpuinfo s390 */
cachesrc = desc->ecaches;
end = desc->necaches - 1;
/* Dont use get_cache_full_size */
shared_allsize = 1;
}
for (i = end; i >= 0; i--) {
ca = &cachesrc[i];
struct libscols_line *line;
int c;
@ -1702,7 +1732,8 @@ print_caches_readable(struct lscpu_desc *desc, int cols[], int ncols,
case COL_CACHE_ALLSIZE:
{
uint64_t sz = 0;
if (shared_allsize)
break;
if (get_cache_full_size(desc, ca, &sz) != 0)
break;
if (mod->bytes)
@ -1751,6 +1782,8 @@ print_caches_readable(struct lscpu_desc *desc, int cols[], int ncols,
}
}
}
scols_print_table(table);
scols_unref_table(table);
}