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 <steiner@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 11 insertions, 0 deletions

diff --git a/drivers/misc/sgi-gru/gru.h b/drivers/misc/sgi-gru/gru.h
index f93f03a9e6e9..3ad76cd18b4b 100644
--- a/drivers/misc/sgi-gru/gru.h
+++ b/drivers/misc/sgi-gru/gru.h
@@ -53,6 +53,17 @@ struct gru_chiplet_info {
         int     free_user_cbr;
 };
 
+/*
+ * Statictics kept for each context.
+ */
+struct gru_gseg_statistics {
+        unsigned long   fmm_tlbmiss;
+        unsigned long   upm_tlbmiss;
+        unsigned long   tlbdropin;
+        unsigned long   context_stolen;
+        unsigned long   reserved[10];
+};
+
 /* Flags for GRU options on the gru_create_context() call */
 /* Select one of the follow 4 options to specify how TLB misses are handled */
 #define GRU_OPT_MISS_DEFAULT    0x0000  /* Use default mode */