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Code Issues Releases Activity

add support for resizing the the tte_hash of multi-threaded processes

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This commit is contained in:
Kip Macy 2006-11-22 04:33:34 +00:00
parent 9872e24f3c
commit 34ec92870b
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=164497
3 changed files with 25 additions and 17 deletions
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2
sys/sun4v/include/tte_hash.h
View File

@ -73,6 +73,6 @@ tte_t tte_hash_update(tte_hash_t hash, vm_offset_t va, tte_t tte_data);
int tte_hash_needs_resize(tte_hash_t th);
tte_hash_t tte_hash_resize(tte_hash_t th, uint64_t *scratchval);
tte_hash_t tte_hash_resize(tte_hash_t th);
#endif /* _MACHINE_TTE_HASH_H_ */

20
sys/sun4v/sun4v/pmap.c
View File

@ -195,6 +195,8 @@ static void pmap_insert_entry(pmap_t pmap, vm_offset_t va, vm_page_t m);
static void pmap_remove_entry(struct pmap *pmap, vm_page_t m, vm_offset_t va);
static void pmap_remove_tte(pmap_t pmap, tte_t tte_data, vm_offset_t va);
static void pmap_enter_quick_locked(pmap_t pmap, vm_offset_t va, vm_page_t m, vm_prot_t prot);
static void pmap_tte_hash_resize(pmap_t pmap);
void pmap_set_ctx_panic(uint64_t error, vm_paddr_t tsb_ra, pmap_t pmap);
@ -903,7 +905,7 @@ pmap_copy(pmap_t dst_pmap, pmap_t src_pmap, vm_offset_t dst_addr,
PMAP_UNLOCK(src_pmap);
if (tte_hash_needs_resize(dst_pmap->pm_hash))
dst_pmap->pm_hash = tte_hash_resize(dst_pmap->pm_hash, &dst_pmap->pm_hashscratch);
pmap_tte_hash_resize(dst_pmap);
sched_unpin();
vm_page_unlock_queues();
PMAP_UNLOCK(dst_pmap);
@ -1048,7 +1050,7 @@ pmap_enter(pmap_t pmap, vm_offset_t va, vm_page_t m, vm_prot_t prot,
}
if (tte_hash_needs_resize(pmap->pm_hash))
pmap->pm_hash = tte_hash_resize(pmap->pm_hash, &pmap->pm_hashscratch);
pmap_tte_hash_resize(pmap);
#ifdef notyet
if ((PCPU_GET(curpmap) != kernel_pmap) && (curthread->td_proc->p_numthreads == 1)
&& (pmap->pm_tsb_cap_miss_count > pmap->pm_tsb_miss_count >> 2)) {
@ -1974,6 +1976,20 @@ pmap_remove_tte(pmap_t pmap, tte_t tte_data, vm_offset_t va)
}
}
static void
pmap_tte_hash_resize(pmap_t pmap)
{
tte_hash_t old_th = pmap->pm_hash;
pmap->pm_hash = tte_hash_resize(pmap->pm_hash);
if (curthread->td_proc->p_numthreads != 1)
pmap_ipi(pmap, tl_ttehashupdate, pmap->pm_context, pmap->pm_hashscratch);
pmap->pm_hashscratch = tte_hash_set_scratchpad_user(pmap->pm_hash, pmap->pm_context);
tte_hash_destroy(old_th);
}
/*
* pmap_ts_referenced:
*

20
sys/sun4v/sun4v/tte_hash.c
View File

@ -267,9 +267,7 @@ tte_hash_create(uint64_t context, uint64_t *scratchval)
void
tte_hash_destroy(tte_hash_t th)
{
panic("FIXME");
free_tte_hash(th);
tte_hash_cached_free(th);
}
static void
@ -617,22 +615,18 @@ tte_hash_update(tte_hash_t th, vm_offset_t va, tte_t tte_data)
int
tte_hash_needs_resize(tte_hash_t th)
{
return ((th->th_entries > (1 << (th->th_shift + PAGE_SHIFT - TTE_SHIFT)))
&& (th != &kernel_tte_hash) && (curthread->td_proc->p_numthreads == 1));
return ((th->th_entries > (1 << (th->th_shift + PAGE_SHIFT - TTE_SHIFT + 1)))
&& (th != &kernel_tte_hash));
}
tte_hash_t
tte_hash_resize(tte_hash_t th, uint64_t *scratchval)
tte_hash_resize(tte_hash_t th)
{
int i, j, nentries;
tte_hash_t newth;
tte_hash_entry_t src_entry, dst_entry, newentry;
/*
* only resize single threaded processes for now :-(
*/
if (th == &kernel_tte_hash || curthread->td_proc->p_numthreads != 1)
panic("tte_hash_resize not supported for this pmap");
KASSERT(th != &kernel_tte_hash,("tte_hash_resize not supported for this pmap"));
if ((newth = tte_hash_cached_get((th->th_shift - HASH_ENTRY_SHIFT) + 1)) != NULL) {
newth->th_context = th->th_context;
@ -662,8 +656,6 @@ tte_hash_resize(tte_hash_t th, uint64_t *scratchval)
KASSERT(th->th_entries == newth->th_entries,
("not all entries copied old=%d new=%d", th->th_entries, newth->th_entries));
tte_hash_cached_free(th);
*scratchval = tte_hash_set_scratchpad_user(newth, newth->th_context);
return (newth);
}