Commit 9da4714a authored by Christoph Lameter's avatar Christoph Lameter Committed by Pekka Enberg

slub: slabinfo update for cmpxchg handling

Update the statistics handling and the slabinfo tool to include the new
statistics in the reports it generates.
Signed-off-by: default avatarChristoph Lameter <cl@linux.com>
Signed-off-by: default avatarPekka Enberg <penberg@kernel.org>
parent 4eade540
...@@ -2,8 +2,9 @@ ...@@ -2,8 +2,9 @@
* Slabinfo: Tool to get reports about slabs * Slabinfo: Tool to get reports about slabs
* *
* (C) 2007 sgi, Christoph Lameter * (C) 2007 sgi, Christoph Lameter
* (C) 2011 Linux Foundation, Christoph Lameter
* *
* Compile by: * Compile with:
* *
* gcc -o slabinfo slabinfo.c * gcc -o slabinfo slabinfo.c
*/ */
...@@ -39,6 +40,8 @@ struct slabinfo { ...@@ -39,6 +40,8 @@ struct slabinfo {
unsigned long cpuslab_flush, deactivate_full, deactivate_empty; unsigned long cpuslab_flush, deactivate_full, deactivate_empty;
unsigned long deactivate_to_head, deactivate_to_tail; unsigned long deactivate_to_head, deactivate_to_tail;
unsigned long deactivate_remote_frees, order_fallback; unsigned long deactivate_remote_frees, order_fallback;
unsigned long cmpxchg_double_cpu_fail, cmpxchg_double_fail;
unsigned long alloc_node_mismatch, deactivate_bypass;
int numa[MAX_NODES]; int numa[MAX_NODES];
int numa_partial[MAX_NODES]; int numa_partial[MAX_NODES];
} slabinfo[MAX_SLABS]; } slabinfo[MAX_SLABS];
...@@ -99,7 +102,7 @@ static void fatal(const char *x, ...) ...@@ -99,7 +102,7 @@ static void fatal(const char *x, ...)
static void usage(void) static void usage(void)
{ {
printf("slabinfo 5/7/2007. (c) 2007 sgi.\n\n" printf("slabinfo 4/15/2011. (c) 2007 sgi/(c) 2011 Linux Foundation.\n\n"
"slabinfo [-ahnpvtsz] [-d debugopts] [slab-regexp]\n" "slabinfo [-ahnpvtsz] [-d debugopts] [slab-regexp]\n"
"-a|--aliases Show aliases\n" "-a|--aliases Show aliases\n"
"-A|--activity Most active slabs first\n" "-A|--activity Most active slabs first\n"
...@@ -293,7 +296,7 @@ int line = 0; ...@@ -293,7 +296,7 @@ int line = 0;
static void first_line(void) static void first_line(void)
{ {
if (show_activity) if (show_activity)
printf("Name Objects Alloc Free %%Fast Fallb O\n"); printf("Name Objects Alloc Free %%Fast Fallb O CmpX UL\n");
else else
printf("Name Objects Objsize Space " printf("Name Objects Objsize Space "
"Slabs/Part/Cpu O/S O %%Fr %%Ef Flg\n"); "Slabs/Part/Cpu O/S O %%Fr %%Ef Flg\n");
...@@ -379,14 +382,14 @@ static void show_tracking(struct slabinfo *s) ...@@ -379,14 +382,14 @@ static void show_tracking(struct slabinfo *s)
printf("\n%s: Kernel object allocation\n", s->name); printf("\n%s: Kernel object allocation\n", s->name);
printf("-----------------------------------------------------------------------\n"); printf("-----------------------------------------------------------------------\n");
if (read_slab_obj(s, "alloc_calls")) if (read_slab_obj(s, "alloc_calls"))
printf(buffer); printf("%s", buffer);
else else
printf("No Data\n"); printf("No Data\n");
printf("\n%s: Kernel object freeing\n", s->name); printf("\n%s: Kernel object freeing\n", s->name);
printf("------------------------------------------------------------------------\n"); printf("------------------------------------------------------------------------\n");
if (read_slab_obj(s, "free_calls")) if (read_slab_obj(s, "free_calls"))
printf(buffer); printf("%s", buffer);
else else
printf("No Data\n"); printf("No Data\n");
...@@ -400,7 +403,7 @@ static void ops(struct slabinfo *s) ...@@ -400,7 +403,7 @@ static void ops(struct slabinfo *s)
if (read_slab_obj(s, "ops")) { if (read_slab_obj(s, "ops")) {
printf("\n%s: kmem_cache operations\n", s->name); printf("\n%s: kmem_cache operations\n", s->name);
printf("--------------------------------------------\n"); printf("--------------------------------------------\n");
printf(buffer); printf("%s", buffer);
} else } else
printf("\n%s has no kmem_cache operations\n", s->name); printf("\n%s has no kmem_cache operations\n", s->name);
} }
...@@ -462,19 +465,32 @@ static void slab_stats(struct slabinfo *s) ...@@ -462,19 +465,32 @@ static void slab_stats(struct slabinfo *s)
if (s->cpuslab_flush) if (s->cpuslab_flush)
printf("Flushes %8lu\n", s->cpuslab_flush); printf("Flushes %8lu\n", s->cpuslab_flush);
if (s->alloc_refill)
printf("Refill %8lu\n", s->alloc_refill);
total = s->deactivate_full + s->deactivate_empty + total = s->deactivate_full + s->deactivate_empty +
s->deactivate_to_head + s->deactivate_to_tail; s->deactivate_to_head + s->deactivate_to_tail + s->deactivate_bypass;
if (total) if (total) {
printf("Deactivate Full=%lu(%lu%%) Empty=%lu(%lu%%) " printf("\nSlab Deactivation Ocurrences %%\n");
"ToHead=%lu(%lu%%) ToTail=%lu(%lu%%)\n", printf("-------------------------------------------------\n");
s->deactivate_full, (s->deactivate_full * 100) / total, printf("Slab full %7lu %3lu%%\n",
s->deactivate_empty, (s->deactivate_empty * 100) / total, s->deactivate_full, (s->deactivate_full * 100) / total);
s->deactivate_to_head, (s->deactivate_to_head * 100) / total, printf("Slab empty %7lu %3lu%%\n",
s->deactivate_empty, (s->deactivate_empty * 100) / total);
printf("Moved to head of partial list %7lu %3lu%%\n",
s->deactivate_to_head, (s->deactivate_to_head * 100) / total);
printf("Moved to tail of partial list %7lu %3lu%%\n",
s->deactivate_to_tail, (s->deactivate_to_tail * 100) / total); s->deactivate_to_tail, (s->deactivate_to_tail * 100) / total);
printf("Deactivation bypass %7lu %3lu%%\n",
s->deactivate_bypass, (s->deactivate_bypass * 100) / total);
printf("Refilled from foreign frees %7lu %3lu%%\n",
s->alloc_refill, (s->alloc_refill * 100) / total);
printf("Node mismatch %7lu %3lu%%\n",
s->alloc_node_mismatch, (s->alloc_node_mismatch * 100) / total);
}
if (s->cmpxchg_double_fail || s->cmpxchg_double_cpu_fail)
printf("\nCmpxchg_double Looping\n------------------------\n");
printf("Locked Cmpxchg Double redos %lu\nUnlocked Cmpxchg Double redos %lu\n",
s->cmpxchg_double_fail, s->cmpxchg_double_cpu_fail);
} }
static void report(struct slabinfo *s) static void report(struct slabinfo *s)
...@@ -573,12 +589,13 @@ static void slabcache(struct slabinfo *s) ...@@ -573,12 +589,13 @@ static void slabcache(struct slabinfo *s)
total_alloc = s->alloc_fastpath + s->alloc_slowpath; total_alloc = s->alloc_fastpath + s->alloc_slowpath;
total_free = s->free_fastpath + s->free_slowpath; total_free = s->free_fastpath + s->free_slowpath;
printf("%-21s %8ld %10ld %10ld %3ld %3ld %5ld %1d\n", printf("%-21s %8ld %10ld %10ld %3ld %3ld %5ld %1d %4ld %4ld\n",
s->name, s->objects, s->name, s->objects,
total_alloc, total_free, total_alloc, total_free,
total_alloc ? (s->alloc_fastpath * 100 / total_alloc) : 0, total_alloc ? (s->alloc_fastpath * 100 / total_alloc) : 0,
total_free ? (s->free_fastpath * 100 / total_free) : 0, total_free ? (s->free_fastpath * 100 / total_free) : 0,
s->order_fallback, s->order); s->order_fallback, s->order, s->cmpxchg_double_fail,
s->cmpxchg_double_cpu_fail);
} }
else else
printf("%-21s %8ld %7d %8s %14s %4d %1d %3ld %3ld %s\n", printf("%-21s %8ld %7d %8s %14s %4d %1d %3ld %3ld %s\n",
...@@ -1190,6 +1207,10 @@ static void read_slab_dir(void) ...@@ -1190,6 +1207,10 @@ static void read_slab_dir(void)
slab->deactivate_to_tail = get_obj("deactivate_to_tail"); slab->deactivate_to_tail = get_obj("deactivate_to_tail");
slab->deactivate_remote_frees = get_obj("deactivate_remote_frees"); slab->deactivate_remote_frees = get_obj("deactivate_remote_frees");
slab->order_fallback = get_obj("order_fallback"); slab->order_fallback = get_obj("order_fallback");
slab->cmpxchg_double_cpu_fail = get_obj("cmpxchg_double_cpu_fail");
slab->cmpxchg_double_fail = get_obj("cmpxchg_double_fail");
slab->alloc_node_mismatch = get_obj("alloc_node_mismatch");
slab->deactivate_bypass = get_obj("deactivate_bypass");
chdir(".."); chdir("..");
if (slab->name[0] == ':') if (slab->name[0] == ':')
alias_targets++; alias_targets++;
......
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