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Date: Fri, 28 Feb 2014 12:43:07 -0500 From: Don Zickus <dzickus@...hat.com> To: acme@...stprotocols.net Cc: LKML <linux-kernel@...r.kernel.org>, jolsa@...hat.com, jmario@...hat.com, fowles@...each.com, eranian@...gle.com, Don Zickus <dzickus@...hat.com> Subject: [PATCH 18/19] perf, c2c: Add symbol count table Just another table that displays the referenced symbols in the analysis report. The table lists the most frequently used symbols first. It is just another way to look at similar data to figure out who is causing the most contention (based on the workload used). Original done by Dick Fowles, backported by me. Sample output: ======================================================================================================= Object Name, Path & Reference Counts Index Records Object Name Object Path ======================================================================================================= 0 931379 [kernel.kallsyms] [kernel.kallsyms] 1 192258 fio /home/joe/old_fio-2.0.15/fio 2 80302 [jbd2] /lib/modules/3.10.0c2c_all+/kernel/fs/jbd2/jbd2.ko 3 65392 [ext4] /lib/modules/3.10.0c2c_all+/kernel/fs/ext4/ext4.ko V2: refresh to latest upstream changes and hist_entry Original-by: Dick Fowles <rfowles@...hat.com> Signed-off-by: Don Zickus <dzickus@...hat.com> --- tools/perf/builtin-c2c.c | 99 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 99 insertions(+) diff --git a/tools/perf/builtin-c2c.c b/tools/perf/builtin-c2c.c index c095f1b..0749ea6 100644 --- a/tools/perf/builtin-c2c.c +++ b/tools/perf/builtin-c2c.c @@ -685,6 +685,104 @@ static void c2c_hit__update_stats(struct c2c_stats *new, new->total_period += old->total_period; } +LIST_HEAD(ref_tree); +LIST_HEAD(ref_tree_sorted); +struct refs { + struct list_head list; + int nr; + const char *name; + const char *long_name; +}; + +static int update_ref_list(struct hist_entry *entry) +{ + struct refs *p; + struct dso *dso = entry->mem_info->iaddr.map->dso; + const char *name = dso->short_name; + + list_for_each_entry(p, &ref_tree, list) { + if (!strcmp(p->name, name)) + goto found; + } + + p = zalloc(sizeof(struct refs)); + if (!p) + return -1; + p->name = name; + p->long_name = dso->long_name; + list_add_tail(&p->list, &ref_tree); + +found: + p->nr++; + return 0; +} + +static void print_symbol_record_count(struct rb_root *tree) +{ + struct rb_node *next = rb_first(tree); + struct hist_entry *he; + struct refs *p, *q, *pn; + char string[256]; + char delimit[256]; + int i; + int idx = 0; + + /* gather symbol references */ + while (next) { + he = rb_entry(next, struct hist_entry, rb_node_in); + next = rb_next(&he->rb_node_in); + + if (update_ref_list(he)) { + pr_err("Could not update reference tree\n"); + goto cleanup; + } + } + + /* sort on number of references per symbol */ + list_for_each_entry_safe(p, pn, &ref_tree, list) { + list_del_init(&p->list); + list_for_each_entry(q, &ref_tree_sorted, list) { + if (p->nr > q->nr) { + list_add_tail(&p->list, &q->list); + break; + } + } + if (list_empty(&p->list)) + list_add_tail(&p->list, &ref_tree_sorted); + } + + /* print header info */ + sprintf(string, "%5s %8s %-32s %-80s", + "Index", + "Records", + "Object Name", + "Object Path"); + + delimit[0] = '\0'; + for (i = 0; i < (int)strlen(string); i++) strcat(delimit, "="); + + printf("\n\n"); + printf("%s\n", delimit); + printf("%50s %s\n", " ", "Object Name, Path & Reference Counts"); + printf("\n"); + printf("%s\n", string); + printf("%s\n", delimit); + + /* print out table */ + list_for_each_entry(p, &ref_tree_sorted, list) { + printf("%5d %8d %-32s %-80s\n", + idx, p->nr, p->name, p->long_name); + idx++; + } + printf("\n"); + +cleanup: + list_for_each_entry_safe(p, pn, &ref_tree_sorted, list) { + list_del(&p->list); + free(p); + } +} + static void print_hitm_cacheline_header(void) { #define SHARING_REPORT_TITLE "Shared Cache Line Distribution Pareto" @@ -1266,6 +1364,7 @@ static int perf_c2c__process_events(struct perf_session *session, dump_rb_tree(c2c->hists.entries_in, c2c); print_c2c_trace_report(c2c); c2c_analyze_hitms(c2c); + print_symbol_record_count(c2c->hists.entries_in); err: return err; -- 1.7.11.7 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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