perf c2c report: Add support to choose local HITMs

Currently we sort and limit displayed data based on the remote HITMs
count. Adding support to switch to local HITMs via --display option:

        --display ...     lcl,rmt

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Don Zickus <dzickus@redhat.com>
Cc: Joe Mario <jmario@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/n/tip-inykbom2f19difvsu1e18avr@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 95 insertions, 19 deletions

diff --git a/tools/perf/builtin-c2c.c b/tools/perf/builtin-c2c.c
index 92b3b8171d4d..75bcf1406df3 100644
--- a/tools/perf/builtin-c2c.c
+++ b/tools/perf/builtin-c2c.c
@@ -63,6 +63,13 @@ struct perf_c2c {
         /* HITM shared clines stats */
         struct c2c_stats        hitm_stats;
         int                     shared_clines;
+
+        int                      display;
+};
+
+enum {
+        DISPLAY_LCL,
+        DISPLAY_RMT,
 };
 
 static struct perf_c2c c2c;
@@ -684,15 +691,24 @@ static double percent_hitm(struct c2c_hist_entry *c2c_he)
         struct c2c_hists *hists;
         struct c2c_stats *stats;
         struct c2c_stats *total;
-        int tot, st;
+        int tot = 0, st = 0;
         double p;
 
         hists = container_of(c2c_he->he.hists, struct c2c_hists, hists);
         stats = &c2c_he->stats;
         total = &hists->stats;
 
-        st  = stats->rmt_hitm;
-        tot = total->rmt_hitm;
+        switch (c2c.display) {
+        case DISPLAY_RMT:
+                st  = stats->rmt_hitm;
+                tot = total->rmt_hitm;
+                break;
+        case DISPLAY_LCL:
+                st  = stats->lcl_hitm;
+                tot = total->lcl_hitm;
+        default:
+                break;
+        }
 
         p = tot ? (double) st / tot : 0;
 
@@ -975,14 +991,26 @@ node_entry(struct perf_hpp_fmt *fmt __maybe_unused, struct perf_hpp *hpp,
                         ret = scnprintf(hpp->buf, hpp->size, "%2d{%2d ", node, num);
                         advance_hpp(hpp, ret);
 
+                #define DISPLAY_HITM(__h)                                               \
+                        if (c2c_he->stats.__h> 0) {                                     \
+                                ret = scnprintf(hpp->buf, hpp->size, "%5.1f%% ",        \
+                                                percent(stats->__h, c2c_he->stats.__h));\
+                        } else {                                                        \
+                                ret = scnprintf(hpp->buf, hpp->size, "%6s ", "n/a");    \
+                        }
 
-                        if (c2c_he->stats.rmt_hitm > 0) {
-                                ret = scnprintf(hpp->buf, hpp->size, "%5.1f%% ",
-                                                percent(stats->rmt_hitm, c2c_he->stats.rmt_hitm));
-                        } else {
-                                ret = scnprintf(hpp->buf, hpp->size, "%6s ", "n/a");
+                        switch (c2c.display) {
+                        case DISPLAY_RMT:
+                                DISPLAY_HITM(rmt_hitm);
+                                break;
+                        case DISPLAY_LCL:
+                                DISPLAY_HITM(lcl_hitm);
+                        default:
+                                break;
                         }
 
+                #undef DISPLAY_HITM
+
                         advance_hpp(hpp, ret);
 
                         if (c2c_he->stats.store > 0) {
@@ -1258,8 +1286,12 @@ static struct c2c_dimension dim_tot_loads = {
         .width          = 7,
 };
 
+static struct c2c_header percent_hitm_header[] = {
+        [DISPLAY_LCL] = HEADER_BOTH("Lcl", "Hitm"),
+        [DISPLAY_RMT] = HEADER_BOTH("Rmt", "Hitm"),
+};
+
 static struct c2c_dimension dim_percent_hitm = {
-        .header         = HEADER_LOW("%hitm"),
         .name           = "percent_hitm",
         .cmp            = percent_hitm_cmp,
         .entry          = percent_hitm_entry,
@@ -1654,23 +1686,39 @@ static bool he__display(struct hist_entry *he, struct c2c_stats *stats)
 
         c2c_he = container_of(he, struct c2c_hist_entry, he);
 
-        if (stats->rmt_hitm) {
-                ld_dist = ((double)c2c_he->stats.rmt_hitm / stats->rmt_hitm);
-                if (ld_dist < DISPLAY_LINE_LIMIT)
-                        he->filtered = HIST_FILTER__C2C;
-        } else {
-                he->filtered = HIST_FILTER__C2C;
+#define FILTER_HITM(__h)                                                \
+        if (stats->__h) {                                               \
+                ld_dist = ((double)c2c_he->stats.__h / stats->__h);     \
+                if (ld_dist < DISPLAY_LINE_LIMIT)                       \
+                        he->filtered = HIST_FILTER__C2C;                \
+        } else {                                                        \
+                he->filtered = HIST_FILTER__C2C;                        \
         }
 
+        switch (c2c.display) {
+        case DISPLAY_LCL:
+                FILTER_HITM(lcl_hitm);
+                break;
+        case DISPLAY_RMT:
+                FILTER_HITM(rmt_hitm);
+        default:
+                break;
+        };
+
+#undef FILTER_HITM
+
         return he->filtered == 0;
 }
 
 static inline int valid_hitm_or_store(struct hist_entry *he)
 {
         struct c2c_hist_entry *c2c_he;
+        bool has_hitm;
 
         c2c_he = container_of(he, struct c2c_hist_entry, he);
-        return c2c_he->stats.rmt_hitm || c2c_he->stats.store;
+        has_hitm = c2c.display == DISPLAY_LCL ?
+                   c2c_he->stats.lcl_hitm : c2c_he->stats.rmt_hitm;
+        return has_hitm || c2c_he->stats.store;
 }
 
 static int filter_cb(struct hist_entry *he)
@@ -1951,6 +1999,8 @@ static void print_c2c_info(FILE *out, struct perf_session *session)
                         perf_evsel__name(evsel));
                 first = false;
         }
+        fprintf(out, "  Cachelines sort on                : %s HITMs\n",
+                c2c.display == DISPLAY_LCL ? "Local" : "Remote");
 }
 
 static void perf_c2c__hists_fprintf(FILE *out, struct perf_session *session)
@@ -2083,8 +2133,10 @@ static int perf_c2c_browser__title(struct hist_browser *browser,
                                    char *bf, size_t size)
 {
         scnprintf(bf, size,
-                  "Shared Data Cache Line Table "
-                  "(%lu entries)", browser->nr_non_filtered_entries);
+                  "Shared Data Cache Line Table     "
+                  "(%lu entries, sorted on %s HITMs)",
+                  browser->nr_non_filtered_entries,
+                  c2c.display == DISPLAY_LCL ? "local" : "remote");
         return 0;
 }
 
@@ -2156,6 +2208,8 @@ static void ui_quirks(void)
                 dim_offset.width  = 5;
                 dim_offset.header = header_offset_tui;
         }
+
+        dim_percent_hitm.header = percent_hitm_header[c2c.display];
 }
 
 #define CALLCHAIN_DEFAULT_OPT  "graph,0.5,caller,function,percent"
@@ -2210,6 +2264,22 @@ static int setup_callchain(struct perf_evlist *evlist)
         return 0;
 }
 
+static int setup_display(const char *str)
+{
+        const char *display = str ?: "rmt";
+
+        if (!strcmp(display, "rmt"))
+                c2c.display = DISPLAY_RMT;
+        else if (!strcmp(display, "lcl"))
+                c2c.display = DISPLAY_LCL;
+        else {
+                pr_err("failed: unknown display type: %s\n", str);
+                return -1;
+        }
+
+        return 0;
+}
+
 static int perf_c2c__report(int argc, const char **argv)
 {
         struct perf_session *session;
@@ -2218,6 +2288,7 @@ static int perf_c2c__report(int argc, const char **argv)
                 .mode = PERF_DATA_MODE_READ,
         };
         char callchain_default_opt[] = CALLCHAIN_DEFAULT_OPT;
+        const char *display = NULL;
         const struct option c2c_options[] = {
         OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
                    "file", "vmlinux pathname"),
@@ -2236,6 +2307,7 @@ static int perf_c2c__report(int argc, const char **argv)
                              "print_type,threshold[,print_limit],order,sort_key[,branch],value",
                              callchain_help, &parse_callchain_opt,
                              callchain_default_opt),
+        OPT_STRING('d', "display", &display, NULL, "lcl,rmt"),
         OPT_END()
         };
         int err = 0;
@@ -2260,6 +2332,10 @@ static int perf_c2c__report(int argc, const char **argv)
 
         file.path = input_name;
 
+        err = setup_display(display);
+        if (err)
+                goto out;
+
         err = c2c_hists__init(&c2c.hists, "dcacheline", 2);
         if (err) {
                 pr_debug("Failed to initialize hists\n");
@@ -2307,7 +2383,7 @@ static int perf_c2c__report(int argc, const char **argv)
                         "tot_loads,"
                         "ld_fbhit,ld_l1hit,ld_l2hit,"
                         "ld_lclhit,ld_rmthit",
-                        "rmt_hitm"
+                        c2c.display == DISPLAY_LCL ? "lcl_hitm" : "rmt_hitm"
                         );
 
         ui_progress__init(&prog, c2c.hists.hists.nr_entries, "Sorting...");