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Add a "show uma" command to DDB, which prints out the current stats for

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available UMA zones.  Quite useful for post-mortem debugging of memory
leaks without a dump device configured on a panicked box.

MFC after:	2 weeks
This commit is contained in:
rwatson 2005-10-20 16:39:33 +00:00
parent 9630baabc4
commit f568b9c967
1 changed files with 36 additions and 0 deletions
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36
sys/vm/uma_core.c
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@ -57,7 +57,9 @@ __FBSDID("$FreeBSD$");
#define UMA_DEBUG_ALLOC_1 1
*/
#include "opt_ddb.h"
#include "opt_param.h"
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
@ -86,6 +88,8 @@ __FBSDID("$FreeBSD$");
#include <machine/vmparam.h>
#include <ddb/ddb.h>
/*
* This is the zone and keg from which all zones are spawned. The idea is that
* even the zone & keg heads are allocated from the allocator, so we use the
@ -3039,3 +3043,35 @@ out:
free(buffer, M_TEMP);
return (error);
}
#ifdef DDB
DB_SHOW_COMMAND(uma, db_show_uma)
{
u_int64_t allocs, frees;
uma_bucket_t bucket;
uma_keg_t kz;
uma_zone_t z;
int cachefree;
db_printf("%18s %12s %12s %12s %8s\n", "Zone", "Allocs", "Frees",
"Used", "Cache");
LIST_FOREACH(kz, &uma_kegs, uk_link) {
LIST_FOREACH(z, &kz->uk_zones, uz_link) {
if (kz->uk_flags & UMA_ZFLAG_INTERNAL) {
allocs = z->uz_allocs;
frees = z->uz_frees;
cachefree = 0;
} else
uma_zone_sumstat(z, &cachefree, &allocs,
&frees);
if (!((kz->uk_flags & UMA_ZONE_SECONDARY) &&
(LIST_FIRST(&kz->uk_zones) != z)))
cachefree += kz->uk_free;
LIST_FOREACH(bucket, &z->uz_full_bucket, ub_link)
cachefree += bucket->ub_cnt;
db_printf("%18s %12llu %12llu %12llu %8d\n", z->uz_name,
allocs, frees, allocs - frees, cachefree);
}
}
}
#endif