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Make the vm object bypass and collapse counters per CPU.

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Requested by:	mjg
Reviewed by:	kib, markj
MFC after:	1 week
Differential Revision:	https://reviews.freebsd.org/D13611
This commit is contained in:
Alan Cox 2017-12-25 19:36:04 +00:00
parent 4f7afd4f37
commit 115423761e
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=327179
1 changed files with 19 additions and 8 deletions
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27
sys/vm/vm_object.c
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@ -148,13 +148,24 @@ struct vm_object kernel_object_store;
static SYSCTL_NODE(_vm_stats, OID_AUTO, object, CTLFLAG_RD, 0,
"VM object stats");
static long object_collapses;
SYSCTL_LONG(_vm_stats_object, OID_AUTO, collapses, CTLFLAG_RD,
&object_collapses, 0, "VM object collapses");
static counter_u64_t object_collapses = EARLY_COUNTER;
SYSCTL_COUNTER_U64(_vm_stats_object, OID_AUTO, collapses, CTLFLAG_RD,
&object_collapses,
"VM object collapses");
static long object_bypasses;
SYSCTL_LONG(_vm_stats_object, OID_AUTO, bypasses, CTLFLAG_RD,
&object_bypasses, 0, "VM object bypasses");
static counter_u64_t object_bypasses = EARLY_COUNTER;
SYSCTL_COUNTER_U64(_vm_stats_object, OID_AUTO, bypasses, CTLFLAG_RD,
&object_bypasses,
"VM object bypasses");
static void
counter_startup(void)
{
object_collapses = counter_u64_alloc(M_WAITOK);
object_bypasses = counter_u64_alloc(M_WAITOK);
}
SYSINIT(object_counters, SI_SUB_CPU, SI_ORDER_ANY, counter_startup, NULL);
static uma_zone_t obj_zone;
@ -1875,7 +1886,7 @@ vm_object_collapse(vm_object_t object)
vm_object_destroy(backing_object);
vm_object_pip_wakeup(object);
object_collapses++;
counter_u64_add(object_collapses, 1);
} else {
/*
* If we do not entirely shadow the backing object,
@ -1916,7 +1927,7 @@ vm_object_collapse(vm_object_t object)
*/
backing_object->ref_count--;
VM_OBJECT_WUNLOCK(backing_object);
object_bypasses++;
counter_u64_add(object_bypasses, 1);
}
/*