From: Namhyung Kim Date: Thu, 21 Aug 2014 01:15:45 +0000 (+0900) Subject: perf hists browser: Cleanup callchain print functions X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=c09a7e755c025558cb882fa20a5f30da738536fa;p=openwrt%2Fstaging%2Fblogic.git perf hists browser: Cleanup callchain print functions The hist_browser__show_callchain() and friends don't need to be that complex. They're splitted in 3 pieces - one for traversing top-level tree, other one for special casing first chains in the top-level entries, and last one for recursive traversing inner trees. It led to code duplication and unnecessary complexity IMHO. Simplify the function and consolidate the logic into a single function - it can recursively call itself. A little difference in printing callchains in top-level tree can be handled with a small change. It should have no functional change. Signed-off-by: Namhyung Kim Acked-by: Jiri Olsa Cc: Andi Kleen Cc: David Ahern Cc: Frederic Weisbecker Cc: Ingo Molnar Cc: Jiri Olsa Cc: Namhyung Kim Cc: Paul Mackerras Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/1408583746-5540-2-git-send-email-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo --- diff --git a/tools/perf/ui/browsers/hists.c b/tools/perf/ui/browsers/hists.c index d42d8a8f3810..519353d9f5fb 100644 --- a/tools/perf/ui/browsers/hists.c +++ b/tools/perf/ui/browsers/hists.c @@ -502,23 +502,16 @@ static void hist_browser__show_callchain_entry(struct hist_browser *browser, #define LEVEL_OFFSET_STEP 3 -static int hist_browser__show_callchain_node_rb_tree(struct hist_browser *browser, - struct callchain_node *chain_node, - u64 total, int level, - unsigned short row, - off_t *row_offset, - bool *is_current_entry) +static int hist_browser__show_callchain(struct hist_browser *browser, + struct rb_root *root, int level, + unsigned short row, off_t *row_offset, + u64 total, bool *is_current_entry) { struct rb_node *node; int first_row = row, offset = level * LEVEL_OFFSET_STEP; u64 new_total; - if (callchain_param.mode == CHAIN_GRAPH_REL) - new_total = chain_node->children_hit; - else - new_total = total; - - node = rb_first(&chain_node->rb_root); + node = rb_first(root); while (node) { struct callchain_node *child = rb_entry(node, struct callchain_node, rb_node); struct rb_node *next = rb_next(node); @@ -535,7 +528,7 @@ static int hist_browser__show_callchain_node_rb_tree(struct hist_browser *browse if (first) first = false; - else + else if (level > 1) extra_offset = LEVEL_OFFSET_STEP; folded_sign = callchain_list__folded(chain); @@ -547,8 +540,9 @@ static int hist_browser__show_callchain_node_rb_tree(struct hist_browser *browse alloc_str = NULL; str = callchain_list__sym_name(chain, bf, sizeof(bf), browser->show_dso); - if (was_first) { - double percent = cumul * 100.0 / new_total; + + if (was_first && level > 1) { + double percent = cumul * 100.0 / total; if (asprintf(&alloc_str, "%2.2f%% %s", percent, str) < 0) str = "Not enough memory!"; @@ -571,78 +565,23 @@ do_next: if (folded_sign == '-') { const int new_level = level + (extra_offset ? 2 : 1); - row += hist_browser__show_callchain_node_rb_tree(browser, child, new_total, - new_level, row, row_offset, - is_current_entry); - } - if (row == browser->b.rows) - goto out; - node = next; - } -out: - return row - first_row; -} - -static int hist_browser__show_callchain_node(struct hist_browser *browser, - struct callchain_node *node, - int level, unsigned short row, - off_t *row_offset, - bool *is_current_entry) -{ - struct callchain_list *chain; - int first_row = row; - int offset = level * LEVEL_OFFSET_STEP; - char folded_sign = ' '; - - list_for_each_entry(chain, &node->val, list) { - char bf[1024], *s; - folded_sign = callchain_list__folded(chain); + if (callchain_param.mode == CHAIN_GRAPH_REL) + new_total = child->children_hit; + else + new_total = total; - if (*row_offset != 0) { - --*row_offset; - continue; + row += hist_browser__show_callchain(browser, &child->rb_root, + new_level, + row, row_offset, + new_total, + is_current_entry); } - - s = callchain_list__sym_name(chain, bf, sizeof(bf), - browser->show_dso); - hist_browser__show_callchain_entry(browser, chain, row, - offset, folded_sign, s, - is_current_entry); - - if (++row == browser->b.rows) - goto out; - } - - if (folded_sign == '-') - row += hist_browser__show_callchain_node_rb_tree(browser, node, - browser->hists->stats.total_period, - level + 1, row, - row_offset, - is_current_entry); -out: - return row - first_row; -} - -static int hist_browser__show_callchain(struct hist_browser *browser, - struct rb_root *chain, - int level, unsigned short row, - off_t *row_offset, - bool *is_current_entry) -{ - struct rb_node *nd; - int first_row = row; - - for (nd = rb_first(chain); nd; nd = rb_next(nd)) { - struct callchain_node *node = rb_entry(nd, struct callchain_node, rb_node); - - row += hist_browser__show_callchain_node(browser, node, level, - row, row_offset, - is_current_entry); if (row == browser->b.rows) break; + node = next; } - +out: return row - first_row; } @@ -817,9 +756,16 @@ static int hist_browser__show_entry(struct hist_browser *browser, --row_offset; if (folded_sign == '-' && row != browser->b.rows) { - printed += hist_browser__show_callchain(browser, &entry->sorted_chain, + u64 total = hists__total_period(entry->hists); + + if (symbol_conf.cumulate_callchain) + total = entry->stat_acc->period; + + printed += hist_browser__show_callchain(browser, + &entry->sorted_chain, 1, row, &row_offset, - ¤t_entry); + total, ¤t_entry); + if (current_entry) browser->he_selection = entry; }