From 5958ab88f721d312b531d17705fc3ed54102fa05 Mon Sep 17 00:00:00 2001 From: Jack Steiner Date: Tue, 15 Dec 2009 16:48:18 -0800 Subject: gru: improve GRU TLB dropin statistics 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 Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/misc/sgi-gru/grufault.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) (limited to 'drivers/misc/sgi-gru/grufault.c') diff --git a/drivers/misc/sgi-gru/grufault.c b/drivers/misc/sgi-gru/grufault.c index 6ff6dfb7516d..38657cdaf54d 100644 --- a/drivers/misc/sgi-gru/grufault.c +++ b/drivers/misc/sgi-gru/grufault.c @@ -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(>s->ts_mm->mmap_sem)) { - gts->ustats.fmm_tlbdropin++; gru_try_dropin(gru, gts, tfh, NULL); up_read(>s->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); -- cgit v1.2.3-55-g7522