[PATCH v6 21/25] perf hists browser: Align column header in hierarchy mode

Namhyung Kim
2016-02-16T14:13:07Z

Like in stdio, fit column header to hierarchy output. Merge column
headers with "/" as a separator.

Overhead Command / Shared Object / Symbol
...
+ 0.09% dwm
+ 0.06% emacs
- 0.05% perf
- 0.05% [kernel.vmlinux]
+ 0.03% [k] memcpy_orig
+ 0.01% [k] unmap_single_vma
+ 0.01% [k] smp_call_function_single
+ 0.00% [k] native_irq_return_iret
+ 0.00% [k] arch_trigger_all_cpu_backtrace_handler
+ 0.00% [k] native_write_msr_safe

Acked-by: Pekka Enberg <penberg@kernel.org>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
---
tools/perf/ui/browsers/hists.c | 69 +++++++++++++++++++++++++++++++++++++++++-
1 file changed, 68 insertions(+), 1 deletion(-)

diff --git a/tools/perf/ui/browsers/hists.c b/tools/perf/ui/browsers/hists.c
index d209cf07bd12..e9dc5c2a40a5 100644
--- a/tools/perf/ui/browsers/hists.c
+++ b/tools/perf/ui/browsers/hists.c
@@ -1430,11 +1430,78 @@ static int hists_browser__scnprintf_headers(struct hist_browser *browser, char *
return ret;
}

+static int hists_browser__scnprintf_hierarchy_headers(struct hist_browser *browser, char *buf, size_t size)
+{
+ struct hists *hists = browser->hists;
+ struct perf_hpp dummy_hpp = {
+ .buf = buf,
+ .size = size,
+ };
+ struct perf_hpp_fmt *fmt;
+ size_t ret = 0;
+ int column = 0;
+ int nr_sort_keys = hists->hpp_list->nr_sort_keys;
+ bool first = true;
+
+ ret = scnprintf(buf, size, " ");
+ if (advance_hpp_check(&dummy_hpp, ret))
+ return ret;
+
+ hists__for_each_format(hists, fmt) {
+ if (column++ < browser->b.horiz_scroll)
+ continue;
+
+ if (perf_hpp__is_sort_entry(fmt) || perf_hpp__is_dynamic_entry(fmt))
+ break;
+
+ ret = fmt->header(fmt, &dummy_hpp, hists_to_evsel(hists));
+ if (advance_hpp_check(&dummy_hpp, ret))
+ break;
+
+ ret = scnprintf(dummy_hpp.buf, dummy_hpp.size, " ");
+ if (advance_hpp_check(&dummy_hpp, ret))
+ break;
+ }
+
+ ret = scnprintf(dummy_hpp.buf, dummy_hpp.size, "%*s",
+ (nr_sort_keys - 1) * HIERARCHY_INDENT, "");
+ if (advance_hpp_check(&dummy_hpp, ret))
+ return ret;
+
+ hists__for_each_format(hists, fmt) {
+ if (!perf_hpp__is_sort_entry(fmt) && !perf_hpp__is_dynamic_entry(fmt))
+ continue;
+
+ if (first) {
+ first = false;
+ } else {
+ ret = scnprintf(dummy_hpp.buf, dummy_hpp.size, " / ");
+ if (advance_hpp_check(&dummy_hpp, ret))
+ break;
+ }
+
+ ret = fmt->header(fmt, &dummy_hpp, hists_to_evsel(hists));
+ dummy_hpp.buf[ret] = '\0';
+ rtrim(dummy_hpp.buf);
+
+ ret = strlen(dummy_hpp.buf);
+ if (advance_hpp_check(&dummy_hpp, ret))
+ break;
+ }
+
+ return ret;
+}
+
static void hist_browser__show_headers(struct hist_browser *browser)
{
char headers[1024];

- hists_browser__scnprintf_headers(browser, headers, sizeof(headers));
+ if (symbol_conf.report_hierarchy)
+ hists_browser__scnprintf_hierarchy_headers(browser, headers,
+ sizeof(headers));
+ else
+ hists_browser__scnprintf_headers(browser, headers,
+ sizeof(headers));
ui_browser__gotorc(&browser->b, 0, 0);
ui_browser__set_color(&browser->b, HE_COLORSET_ROOT);
ui_browser__write_nstring(&browser->b, headers, browser->b.width + 1);
--
2.7.1