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gru: improve GRU TLB dropin statistics

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Update the TLB dropin statistics kept for each GRU context.  Count TLB
dropins separate from the misses - some misses do not result in a TLB
dropin.  Some of the diagnostics need both counts.

Signed-off-by: Jack Steiner <steiner@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Jack Steiner
2009-12-15 16:48:18 -08:00
committed by Linus Torvalds
parent 2ce4d4c937
commit 5958ab88f7
4 changed files with 17 additions and 14 deletions
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5
drivers/misc/sgi-gru/grufault.c
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@@ -438,6 +438,7 @@ static int gru_try_dropin(struct gru_state *gru,
}
gru_cb_set_istatus_active(cbk);
gts->ustats.tlbdropin++;
tfh_write_restart(tfh, gpa, GAA_RAM, vaddr, asid, write,
GRU_PAGESIZE(pageshift));
gru_dbg(grudev,
@@ -580,9 +581,9 @@ static irqreturn_t gru_intr(int chiplet, int blade)
* This is running in interrupt context. Trylock the mmap_sem.
* If it fails, retry the fault in user context.
*/
gts->ustats.fmm_tlbmiss++;
if (!gts->ts_force_cch_reload &&
down_read_trylock(&gts->ts_mm->mmap_sem)) {
gts->ustats.fmm_tlbdropin++;
gru_try_dropin(gru, gts, tfh, NULL);
up_read(&gts->ts_mm->mmap_sem);
} else {
@@ -624,7 +625,7 @@ static int gru_user_dropin(struct gru_thread_state *gts,
struct gru_mm_struct *gms = gts->ts_gms;
int ret;
gts->ustats.upm_tlbdropin++;
gts->ustats.upm_tlbmiss++;
while (1) {
wait_event(gms->ms_wait_queue,
atomic_read(&gms->ms_range_active) == 0);