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Add some instrumentation to keep track of PMEG allocation. 

Enabled #if DIAGNOSTIC.
This commit is contained in:
pk 1997-03-14 14:28:45 +00:00
parent 353ffc1765
commit 8a5abffaf5
1 changed files with 29 additions and 1 deletions
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30
sys/arch/sparc/sparc/pmap.c
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@ -1,4 +1,4 @@
/* $NetBSD: pmap.c,v 1.69 1997/03/10 23:26:11 pk Exp $ */
/* $NetBSD: pmap.c,v 1.70 1997/03/14 14:28:45 pk Exp $ */
/*
* Copyright (c) 1996
@ -132,6 +132,9 @@ struct pmap_stats {
int ps_useless_changewire; /* useless wiring changes */
int ps_npg_prot_all; /* # of active pages protected */
int ps_npg_prot_actual; /* # pages actually affected */
int ps_npmeg_free; /* # of free pmegs */
int ps_npmeg_locked; /* # of pmegs on locked list */
int ps_npmeg_lru; /* # of pmegs on lru list */
} pmap_stats;
#ifdef DEBUG
@ -1313,6 +1316,13 @@ me_alloc(mh, newpm, newvreg, newvseg)
/* onto on pmap chain; pmap is already locked, if needed */
TAILQ_INSERT_TAIL(&newpm->pm_seglist, me, me_pmchain);
#ifdef DIAGNOSTIC
pmap_stats.ps_npmeg_free--;
if (mh == &segm_locked)
pmap_stats.ps_npmeg_locked++;
else
pmap_stats.ps_npmeg_lru++;
#endif
/* into pmap segment table, with backpointers */
newpm->pm_regmap[newvreg].rg_segmap[newvseg].sg_pmeg = me->me_cookie;
@ -1344,6 +1354,13 @@ me_alloc(mh, newpm, newvreg, newvseg)
TAILQ_REMOVE(&segm_lru, me, me_list);
TAILQ_INSERT_TAIL(mh, me, me_list);
#ifdef DIAGNOSTIC
if (mh == &segm_locked) {
pmap_stats.ps_npmeg_lru--;
pmap_stats.ps_npmeg_locked++;
}
#endif
rp = &pm->pm_regmap[me->me_vreg];
if (rp->rg_segmap == NULL)
panic("me_alloc: LRU entry's pmap has no segments");
@ -1487,13 +1504,22 @@ if (getcontext() != 0) panic("me_free: ctx != 0");
/* off LRU or lock chain */
if (pm == pmap_kernel()) {
TAILQ_REMOVE(&segm_locked, me, me_list);
#ifdef DIAGNOSTIC
pmap_stats.ps_npmeg_locked--;
#endif
} else {
TAILQ_REMOVE(&segm_lru, me, me_list);
#ifdef DIAGNOSTIC
pmap_stats.ps_npmeg_lru--;
#endif
}
/* no associated pmap; on free list */
me->me_pmap = NULL;
TAILQ_INSERT_TAIL(&segm_freelist, me, me_list);
#ifdef DIAGNOSTIC
pmap_stats.ps_npmeg_free++;
#endif
}
#if defined(SUN4_MMU3L)
@ -2905,6 +2931,7 @@ pmap_bootstrap4_4c(nctx, nregion, nsegment)
/* set up the mmu entry */
TAILQ_INSERT_TAIL(&segm_locked, mmuseg, me_list);
TAILQ_INSERT_TAIL(&pmap_kernel()->pm_seglist, mmuseg, me_pmchain);
pmap_stats.ps_npmeg_locked++;
mmuseg->me_cookie = scookie;
mmuseg->me_pmap = pmap_kernel();
mmuseg->me_vreg = vr;
@ -2951,6 +2978,7 @@ pmap_bootstrap4_4c(nctx, nregion, nsegment)
for (; scookie < nsegment; scookie++, mmuseg++) {
mmuseg->me_cookie = scookie;
TAILQ_INSERT_TAIL(&segm_freelist, mmuseg, me_list);
pmap_stats.ps_npmeg_free++;
}
/* Erase all spurious user-space segmaps */