perf tools: Introduce perf_mem__lvl_scnprintf function

Move meminfo's lvl display function into mem-events.c object, so it
could be reused later from script code.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1456303616-26926-7-git-send-email-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 53 insertions, 0 deletions

diff --git a/tools/perf/util/mem-events.c b/tools/perf/util/mem-events.c
index 4be3eb74001b..bddb1217d129 100644
--- a/tools/perf/util/mem-events.c
+++ b/tools/perf/util/mem-events.c
@@ -130,3 +130,56 @@ void perf_mem__tlb_scnprintf(char *out, size_t sz, struct mem_info *mem_info)
         if (miss)
                 strncat(out, " miss", sz - l);
 }
+
+static const char * const mem_lvl[] = {
+        "N/A",
+        "HIT",
+        "MISS",
+        "L1",
+        "LFB",
+        "L2",
+        "L3",
+        "Local RAM",
+        "Remote RAM (1 hop)",
+        "Remote RAM (2 hops)",
+        "Remote Cache (1 hop)",
+        "Remote Cache (2 hops)",
+        "I/O",
+        "Uncached",
+};
+
+void perf_mem__lvl_scnprintf(char *out, size_t sz, struct mem_info *mem_info)
+{
+        size_t i, l = 0;
+        u64 m =  PERF_MEM_LVL_NA;
+        u64 hit, miss;
+
+        if (mem_info)
+                m  = mem_info->data_src.mem_lvl;
+
+        sz -= 1; /* -1 for null termination */
+        out[0] = '\0';
+
+        hit = m & PERF_MEM_LVL_HIT;
+        miss = m & PERF_MEM_LVL_MISS;
+
+        /* already taken care of */
+        m &= ~(PERF_MEM_LVL_HIT|PERF_MEM_LVL_MISS);
+
+        for (i = 0; m && i < ARRAY_SIZE(mem_lvl); i++, m >>= 1) {
+                if (!(m & 0x1))
+                        continue;
+                if (l) {
+                        strcat(out, " or ");
+                        l += 4;
+                }
+                strncat(out, mem_lvl[i], sz - l);
+                l += strlen(mem_lvl[i]);
+        }
+        if (*out == '\0')
+                strcpy(out, "N/A");
+        if (hit)
+                strncat(out, " hit", sz - l);
+        if (miss)
+                strncat(out, " miss", sz - l);
+}