From ef9dfe6ec3e409b68e35c05b882d636140bb3fa7 Mon Sep 17 00:00:00 2001 From: Arnaldo Carvalho de Melo Date: Mon, 26 Sep 2011 12:46:11 -0300 Subject: perf hists: Allow limiting the number of rows and columns in fprintf So that we can reuse hists__fprintf for in the new perf top tool. Cc: David Ahern Cc: Frederic Weisbecker Cc: Mike Galbraith Cc: Paul Mackerras Cc: Peter Zijlstra Cc: Stephane Eranian Link: http://lkml.kernel.org/n/tip-huazw48x05h8r9niz5cf63za@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/util/hist.c | 33 +++++++++++++++++++++++++++------ 1 file changed, 27 insertions(+), 6 deletions(-) (limited to 'tools/perf/util/hist.c') diff --git a/tools/perf/util/hist.c b/tools/perf/util/hist.c index dd277897ff0b..24cca0a7ffa3 100644 --- a/tools/perf/util/hist.c +++ b/tools/perf/util/hist.c @@ -710,12 +710,16 @@ int hist_entry__snprintf(struct hist_entry *self, char *s, size_t size, return ret; } -int hist_entry__fprintf(struct hist_entry *self, struct hists *hists, +int hist_entry__fprintf(struct hist_entry *he, size_t size, struct hists *hists, struct hists *pair_hists, bool show_displacement, long displacement, FILE *fp, u64 session_total) { char bf[512]; - hist_entry__snprintf(self, bf, sizeof(bf), hists, pair_hists, + + if (size == 0 || size > sizeof(bf)) + size = sizeof(bf); + + hist_entry__snprintf(he, bf, size, hists, pair_hists, show_displacement, displacement, true, session_total); return fprintf(fp, "%s\n", bf); @@ -739,7 +743,8 @@ static size_t hist_entry__fprintf_callchain(struct hist_entry *self, } size_t hists__fprintf(struct hists *hists, struct hists *pair, - bool show_displacement, FILE *fp) + bool show_displacement, bool show_header, int max_rows, + int max_cols, FILE *fp) { struct sort_entry *se; struct rb_node *nd; @@ -749,9 +754,13 @@ size_t hists__fprintf(struct hists *hists, struct hists *pair, unsigned int width; const char *sep = symbol_conf.field_sep; const char *col_width = symbol_conf.col_width_list_str; + int nr_rows = 0; init_rem_hits(); + if (!show_header) + goto print_entries; + fprintf(fp, "# %s", pair ? "Baseline" : "Overhead"); if (symbol_conf.show_nr_samples) { @@ -814,7 +823,10 @@ size_t hists__fprintf(struct hists *hists, struct hists *pair, width = hists__col_len(hists, se->se_width_idx); fprintf(fp, " %*s", width, se->se_header); } + fprintf(fp, "\n"); + if (max_rows && ++nr_rows >= max_rows) + goto out; if (sep) goto print_entries; @@ -841,7 +853,13 @@ size_t hists__fprintf(struct hists *hists, struct hists *pair, fprintf(fp, "."); } - fprintf(fp, "\n#\n"); + fprintf(fp, "\n"); + if (max_rows && ++nr_rows >= max_rows) + goto out; + + fprintf(fp, "#\n"); + if (max_rows && ++nr_rows >= max_rows) + goto out; print_entries: for (nd = rb_first(&hists->entries); nd; nd = rb_next(nd)) { @@ -858,19 +876,22 @@ print_entries: displacement = 0; ++position; } - ret += hist_entry__fprintf(h, hists, pair, show_displacement, + ret += hist_entry__fprintf(h, max_cols, hists, pair, show_displacement, displacement, fp, hists->stats.total_period); if (symbol_conf.use_callchain) ret += hist_entry__fprintf_callchain(h, hists, fp, hists->stats.total_period); + if (max_rows && ++nr_rows >= max_rows) + goto out; + if (h->ms.map == NULL && verbose > 1) { __map_groups__fprintf_maps(&h->thread->mg, MAP__FUNCTION, verbose, fp); fprintf(fp, "%.10s end\n", graph_dotted_line); } } - +out: free(rem_sq_bracket); return ret; -- cgit v1.2.3-55-g7522