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: Christoph Lameter <cl@linux.com> Signed-off-by: Pekka Enberg <penberg@kernel.org>
This commit is contained in:
Christoph Lameter
Pekka Enberg
Родитель
4eade540fc
Коммит
9da4714a2d
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@ -2,8 +2,9 @@
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* Slabinfo: Tool to get reports about slabs
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*
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* (C) 2007 sgi, Christoph Lameter
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* (C) 2011 Linux Foundation, Christoph Lameter
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*
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* Compile by:
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* Compile with:
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*
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* gcc -o slabinfo slabinfo.c
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*/
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@ -39,6 +40,8 @@ struct slabinfo {
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unsigned long cpuslab_flush, deactivate_full, deactivate_empty;
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unsigned long deactivate_to_head, deactivate_to_tail;
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unsigned long deactivate_remote_frees, order_fallback;
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unsigned long cmpxchg_double_cpu_fail, cmpxchg_double_fail;
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unsigned long alloc_node_mismatch, deactivate_bypass;
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int numa[MAX_NODES];
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int numa_partial[MAX_NODES];
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} slabinfo[MAX_SLABS];
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@ -99,7 +102,7 @@ static void fatal(const char *x, ...)
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static void usage(void)
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{
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printf("slabinfo 5/7/2007. (c) 2007 sgi.\n\n"
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printf("slabinfo 4/15/2011. (c) 2007 sgi/(c) 2011 Linux Foundation.\n\n"
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"slabinfo [-ahnpvtsz] [-d debugopts] [slab-regexp]\n"
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"-a|--aliases Show aliases\n"
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"-A|--activity Most active slabs first\n"
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@ -293,7 +296,7 @@ int line = 0;
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static void first_line(void)
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{
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if (show_activity)
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printf("Name Objects Alloc Free %%Fast Fallb O\n");
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printf("Name Objects Alloc Free %%Fast Fallb O CmpX UL\n");
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else
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printf("Name Objects Objsize Space "
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"Slabs/Part/Cpu O/S O %%Fr %%Ef Flg\n");
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@ -379,14 +382,14 @@ static void show_tracking(struct slabinfo *s)
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printf("\n%s: Kernel object allocation\n", s->name);
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printf("-----------------------------------------------------------------------\n");
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if (read_slab_obj(s, "alloc_calls"))
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printf(buffer);
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printf("%s", buffer);
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else
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printf("No Data\n");
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printf("\n%s: Kernel object freeing\n", s->name);
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printf("------------------------------------------------------------------------\n");
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if (read_slab_obj(s, "free_calls"))
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printf(buffer);
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printf("%s", buffer);
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else
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printf("No Data\n");
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@ -400,7 +403,7 @@ static void ops(struct slabinfo *s)
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if (read_slab_obj(s, "ops")) {
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printf("\n%s: kmem_cache operations\n", s->name);
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printf("--------------------------------------------\n");
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printf(buffer);
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printf("%s", buffer);
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} else
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printf("\n%s has no kmem_cache operations\n", s->name);
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}
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@ -462,19 +465,32 @@ static void slab_stats(struct slabinfo *s)
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if (s->cpuslab_flush)
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printf("Flushes %8lu\n", s->cpuslab_flush);
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if (s->alloc_refill)
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printf("Refill %8lu\n", s->alloc_refill);
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total = s->deactivate_full + s->deactivate_empty +
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s->deactivate_to_head + s->deactivate_to_tail;
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s->deactivate_to_head + s->deactivate_to_tail + s->deactivate_bypass;
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if (total)
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printf("Deactivate Full=%lu(%lu%%) Empty=%lu(%lu%%) "
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"ToHead=%lu(%lu%%) ToTail=%lu(%lu%%)\n",
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s->deactivate_full, (s->deactivate_full * 100) / total,
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s->deactivate_empty, (s->deactivate_empty * 100) / total,
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s->deactivate_to_head, (s->deactivate_to_head * 100) / total,
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if (total) {
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printf("\nSlab Deactivation Ocurrences %%\n");
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printf("-------------------------------------------------\n");
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printf("Slab full %7lu %3lu%%\n",
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s->deactivate_full, (s->deactivate_full * 100) / total);
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printf("Slab empty %7lu %3lu%%\n",
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s->deactivate_empty, (s->deactivate_empty * 100) / total);
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printf("Moved to head of partial list %7lu %3lu%%\n",
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s->deactivate_to_head, (s->deactivate_to_head * 100) / total);
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printf("Moved to tail of partial list %7lu %3lu%%\n",
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s->deactivate_to_tail, (s->deactivate_to_tail * 100) / total);
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printf("Deactivation bypass %7lu %3lu%%\n",
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s->deactivate_bypass, (s->deactivate_bypass * 100) / total);
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printf("Refilled from foreign frees %7lu %3lu%%\n",
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s->alloc_refill, (s->alloc_refill * 100) / total);
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printf("Node mismatch %7lu %3lu%%\n",
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s->alloc_node_mismatch, (s->alloc_node_mismatch * 100) / total);
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}
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if (s->cmpxchg_double_fail || s->cmpxchg_double_cpu_fail)
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printf("\nCmpxchg_double Looping\n------------------------\n");
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printf("Locked Cmpxchg Double redos %lu\nUnlocked Cmpxchg Double redos %lu\n",
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s->cmpxchg_double_fail, s->cmpxchg_double_cpu_fail);
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}
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static void report(struct slabinfo *s)
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@ -573,12 +589,13 @@ static void slabcache(struct slabinfo *s)
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total_alloc = s->alloc_fastpath + s->alloc_slowpath;
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total_free = s->free_fastpath + s->free_slowpath;
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printf("%-21s %8ld %10ld %10ld %3ld %3ld %5ld %1d\n",
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printf("%-21s %8ld %10ld %10ld %3ld %3ld %5ld %1d %4ld %4ld\n",
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s->name, s->objects,
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total_alloc, total_free,
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total_alloc ? (s->alloc_fastpath * 100 / total_alloc) : 0,
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total_free ? (s->free_fastpath * 100 / total_free) : 0,
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s->order_fallback, s->order);
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s->order_fallback, s->order, s->cmpxchg_double_fail,
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s->cmpxchg_double_cpu_fail);
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}
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else
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printf("%-21s %8ld %7d %8s %14s %4d %1d %3ld %3ld %s\n",
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@ -1190,6 +1207,10 @@ static void read_slab_dir(void)
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slab->deactivate_to_tail = get_obj("deactivate_to_tail");
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slab->deactivate_remote_frees = get_obj("deactivate_remote_frees");
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slab->order_fallback = get_obj("order_fallback");
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slab->cmpxchg_double_cpu_fail = get_obj("cmpxchg_double_cpu_fail");
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slab->cmpxchg_double_fail = get_obj("cmpxchg_double_fail");
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slab->alloc_node_mismatch = get_obj("alloc_node_mismatch");
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slab->deactivate_bypass = get_obj("deactivate_bypass");
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chdir("..");
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if (slab->name[0] == ':')
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alias_targets++;
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