[PATCH 2/2] perf: Add support for the mem_xlvl field.

[Sukadev Bhattiprolu]

>From 9f1a8a16e0ef36447e343d1cd4797c2b6a81225f Mon Sep 17 00:00:00 2001
From: Sukadev Bhattiprolu <sukadev at linux.vnet.ibm.com>
Date: Fri, 7 Jun 2013 13:26:31 -0700
Subject: [PATCH 2/2] perf: Add support for the mem_xlvl field.

A follow-on patch to adding perf_mem_data_src support for Power7.
At this point, this is only  touch-tested as am looking for feedback
on the main kernel patch.

Signed-off-by: Sukadev Bhattiprolu <sukadev at linux.vnet.ibm.com>
---
 tools/perf/util/sort.c |   31 ++++++++++++++++++++++++++++++-
 1 files changed, 30 insertions(+), 1 deletions(-)

diff --git a/tools/perf/util/sort.c b/tools/perf/util/sort.c
index 5f52d49..24bbf4d 100644
--- a/tools/perf/util/sort.c
+++ b/tools/perf/util/sort.c
@@ -631,9 +631,11 @@ static int hist_entry__tlb_snprintf(struct hist_entry *self, char *bf,
 static int64_t
 sort__lvl_cmp(struct hist_entry *left, struct hist_entry *right)
 {
+	int64_t rc;
 	union perf_mem_data_src data_src_l;
 	union perf_mem_data_src data_src_r;
 
+	data_src_l.val = data_src_r.val = (int64_t)0;
 	if (left->mem_info)
 		data_src_l = left->mem_info->data_src;
 	else
@@ -644,7 +646,11 @@ sort__lvl_cmp(struct hist_entry *left, struct hist_entry *right)
 	else
 		data_src_r.mem_lvl = PERF_MEM_LVL_NA;
 
-	return (int64_t)(data_src_r.mem_lvl - data_src_l.mem_lvl);
+	rc = data_src_r.mem_lvl - data_src_l.mem_lvl;
+	if (!rc)
+		rc = data_src_r.mem_xlvl - data_src_l.mem_xlvl;
+		
+	return rc;
 }
 
 static const char * const mem_lvl[] = {
@@ -663,7 +669,14 @@ static const char * const mem_lvl[] = {
 	"I/O",
 	"Uncached",
 };
+
+static const char * const mem_xlvl[] = {
+	"Remote RAM (3 hops)",
+	"Remote Cache (3 hops)",
+};
+
 #define NUM_MEM_LVL (sizeof(mem_lvl)/sizeof(const char *))
+#define NUM_MEM_XLVL (sizeof(mem_xlvl)/sizeof(const char *))
 
 static int hist_entry__lvl_snprintf(struct hist_entry *self, char *bf,
 				    size_t size, unsigned int width)
@@ -695,6 +708,22 @@ static int hist_entry__lvl_snprintf(struct hist_entry *self, char *bf,
 		strncat(out, mem_lvl[i], sz - l);
 		l += strlen(mem_lvl[i]);
 	}
+
+	m = 0;
+	if (self->mem_info)
+		m = self->mem_info->data_src.mem_xlvl;
+
+	for (i = 0; m && i < NUM_MEM_XLVL; i++, m >>= 1) {
+		if (!(m & 0x1))
+			continue;
+		if (l) {
+			strcat(out, " or ");
+			l += 4;
+		}
+		strncat(out, mem_xlvl[i], sz - l);
+		l += strlen(mem_xlvl[i]);
+	}
+
 	if (*out == '\0')
 		strcpy(out, "N/A");
 	if (hit)
-- 
1.7.1