Author: mav
Date: Sun Mar 29 10:02:29 2015
New Revision: 280805
URL: https://svnweb.freebsd.org/changeset/base/280805
Log:
Add four new DDB commands to display vmem(9) statistics.
In particular, such DDB commands were added:
show vmem <addr>
show all vmem
show vmemdump <addr>
show all vmemdump
As possible usage, that allows to see KVA usage and fragmentation.
Modified:
head/sys/kern/subr_vmem.c
Modified: head/sys/kern/subr_vmem.c
==============================================================================
--- head/sys/kern/subr_vmem.c Sun Mar 29 07:48:02 2015 (r280804)
+++ head/sys/kern/subr_vmem.c Sun Mar 29 10:02:29 2015 (r280805)
@@ -1390,6 +1390,8 @@ vmem_dump(const vmem_t *vm , int (*pr)(c
#endif /* defined(DDB) || defined(DIAGNOSTIC) */
#if defined(DDB)
+#include <ddb/ddb.h>
+
static bt_t *
vmem_whatis_lookup(vmem_t *vm, vmem_addr_t addr)
{
@@ -1443,6 +1445,78 @@ vmem_print(vmem_addr_t addr, const char
vmem_dump(vm, pr);
}
+
+DB_SHOW_COMMAND(vmemdump, vmemdump)
+{
+
+ if (!have_addr) {
+ db_printf("usage: show vmemdump <addr>\n");
+ return;
+ }
+
+ vmem_dump((const vmem_t *)addr, db_printf);
+}
+
+DB_SHOW_ALL_COMMAND(vmemdump, vmemdumpall)
+{
+ const vmem_t *vm;
+
+ LIST_FOREACH(vm, &vmem_list, vm_alllist)
+ vmem_dump(vm, db_printf);
+}
+
+DB_SHOW_COMMAND(vmem, vmem_summ)
+{
+ const vmem_t *vm = (const void *)addr;
+ const bt_t *bt;
+ size_t ft[VMEM_MAXORDER], ut[VMEM_MAXORDER];
+ size_t fs[VMEM_MAXORDER], us[VMEM_MAXORDER];
+ int ord;
+
+ if (!have_addr) {
+ db_printf("usage: show vmem <addr>\n");
+ return;
+ }
+
+ db_printf("vmem %p '%s'\n", vm, vm->vm_name);
+ db_printf("\tquantum:\t%zu\n", vm->vm_quantum_mask + 1);
+ db_printf("\tsize:\t%zu\n", vm->vm_size);
+ db_printf("\tinuse:\t%zu\n", vm->vm_inuse);
+ db_printf("\tfree:\t%zu\n", vm->vm_size - vm->vm_inuse);
+ db_printf("\tbusy tags:\t%d\n", vm->vm_nbusytag);
+ db_printf("\tfree tags:\t%d\n", vm->vm_nfreetags);
+
+ memset(&ft, 0, sizeof(ft));
+ memset(&ut, 0, sizeof(ut));
+ memset(&fs, 0, sizeof(fs));
+ memset(&us, 0, sizeof(us));
+ TAILQ_FOREACH(bt, &vm->vm_seglist, bt_seglist) {
+ ord = SIZE2ORDER(bt->bt_size >> vm->vm_quantum_shift);
+ if (bt->bt_type == BT_TYPE_BUSY) {
+ ut[ord]++;
+ us[ord] += bt->bt_size;
+ } else if (bt->bt_type == BT_TYPE_FREE) {
+ ft[ord]++;
+ fs[ord] += bt->bt_size;
+ }
+ }
+ db_printf("\t\t\tinuse\tsize\t\tfree\tsize\n");
+ for (ord = 0; ord < VMEM_MAXORDER; ord++) {
+ if (ut[ord] == 0 && ft[ord] == 0)
+ continue;
+ db_printf("\t%-15zu %zu\t%-15zu %zu\t%-16zu\n",
+ ORDER2SIZE(ord) << vm->vm_quantum_shift,
+ ut[ord], us[ord], ft[ord], fs[ord]);
+ }
+}
+
+DB_SHOW_ALL_COMMAND(vmem, vmem_summall)
+{
+ const vmem_t *vm;
+
+ LIST_FOREACH(vm, &vmem_list, vm_alllist)
+ vmem_summ((db_expr_t)vm, TRUE, count, modif);
+}
#endif /* defined(DDB) */
#define vmem_printf printf
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