x86/UV2: Add accounting for BAU strong nacks

This patch adds separate accounting of UV2 message "strong
nack's" in the BAU statistics.

Signed-off-by: Cliff Wickman <cpw@sgi.com>
Link: http://lkml.kernel.org/r/20120116212238.GF5767@sgi.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>

2 files changed, 8 insertions, 5 deletions

diff --git a/arch/x86/include/asm/uv/uv_bau.h b/arch/x86/include/asm/uv/uv_bau.h
index 1b82f7e87393..becf47b81735 100644
--- a/arch/x86/include/asm/uv/uv_bau.h
+++ b/arch/x86/include/asm/uv/uv_bau.h
@@ -483,6 +483,7 @@ struct ptc_stats {
                                                    requests */
         unsigned long   s_stimeout;             /* source side timeouts */
         unsigned long   s_dtimeout;             /* destination side timeouts */
+        unsigned long   s_strongnacks;          /* number of strong nack's */
         unsigned long   s_time;                 /* time spent in sending side */
         unsigned long   s_retriesok;            /* successful retries */
         unsigned long   s_ntargcpu;             /* total number of cpu's
diff --git a/arch/x86/platform/uv/tlb_uv.c b/arch/x86/platform/uv/tlb_uv.c
index 4686bf1e56ec..9be4cff00a2d 100644
--- a/arch/x86/platform/uv/tlb_uv.c
+++ b/arch/x86/platform/uv/tlb_uv.c
@@ -635,13 +635,15 @@ static int uv2_wait_completion(struct bau_desc *bau_desc,
                  * our message and its state will stay IDLE.
                  */
                 if ((descriptor_stat == UV2H_DESC_SOURCE_TIMEOUT) ||
-                    (descriptor_stat == UV2H_DESC_DEST_STRONG_NACK) ||
                     (descriptor_stat == UV2H_DESC_DEST_PUT_ERR)) {
                         stat->s_stimeout++;
                         return FLUSH_GIVEUP;
+                } else if (descriptor_stat == UV2H_DESC_DEST_STRONG_NACK) {
+                        stat->s_strongnacks++;
+                        bcp->conseccompletes = 0;
+                        return FLUSH_GIVEUP;
                 } else if (descriptor_stat == UV2H_DESC_DEST_TIMEOUT) {
                         stat->s_dtimeout++;
-                        ttm = get_cycles();
                         bcp->conseccompletes = 0;
                         return FLUSH_RETRY_TIMEOUT;
                 } else {
@@ -1346,7 +1348,7 @@ static int ptc_seq_show(struct seq_file *file, void *data)
                 seq_printf(file,
                         "remotehub numuvhubs numuvhubs16 numuvhubs8 ");
                 seq_printf(file,
-                        "numuvhubs4 numuvhubs2 numuvhubs1 dto retries rok ");
+                    "numuvhubs4 numuvhubs2 numuvhubs1 dto snacks retries rok ");
                 seq_printf(file,
                         "resetp resett giveup sto bz throt swack recv rtime ");
                 seq_printf(file,
@@ -1364,10 +1366,10 @@ static int ptc_seq_show(struct seq_file *file, void *data)
                            stat->s_ntargremotes, stat->s_ntargcpu,
                            stat->s_ntarglocaluvhub, stat->s_ntargremoteuvhub,
                            stat->s_ntarguvhub, stat->s_ntarguvhub16);
-                seq_printf(file, "%ld %ld %ld %ld %ld ",
+                seq_printf(file, "%ld %ld %ld %ld %ld %ld ",
                            stat->s_ntarguvhub8, stat->s_ntarguvhub4,
                            stat->s_ntarguvhub2, stat->s_ntarguvhub1,
-                           stat->s_dtimeout);
+                           stat->s_dtimeout, stat->s_strongnacks);
                 seq_printf(file, "%ld %ld %ld %ld %ld %ld %ld %ld ",
                            stat->s_retry_messages, stat->s_retriesok,
                            stat->s_resets_plug, stat->s_resets_timeout,