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authorArnaldo Carvalho de Melo <acme@redhat.com>2011-02-23 07:25:02 -0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2011-02-23 07:25:02 -0300
commit6435a5e39d3e01a1a73a925ed53ee18619b0a368 (patch)
tree263c8c5e90f7dd585d224d839d808425b4fe13fd /tools
parentc97cf42219b7b6037d2f96c27a5f114f2383f828 (diff)
downloadlinux-6435a5e39d3e01a1a73a925ed53ee18619b0a368.tar.gz
perf top browser: Adjust the browser indexes when refreshing
This is not a problem when we're not at the bottom of the active symbols list, so was not noticed, but at the end of the screen it falls apart. Fix it by adjusting the ui_browser indexes according to the new number of entries in the rb_tree and by seeking from the start of the rb_tree to find the new symbol at the top of the screen. Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Cc: Tom Zanussi <tzanussi@gmail.com> LKML-Reference: <new-submission> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools')
-rw-r--r--tools/perf/util/ui/browsers/top.c23
1 files changed, 23 insertions, 0 deletions
diff --git a/tools/perf/util/ui/browsers/top.c b/tools/perf/util/ui/browsers/top.c
index 377ff58c9ae9..2f47224426b6 100644
--- a/tools/perf/util/ui/browsers/top.c
+++ b/tools/perf/util/ui/browsers/top.c
@@ -70,6 +70,7 @@ static void perf_top_browser__write(struct ui_browser *browser, void *entry, int
static void perf_top_browser__update_rb_tree(struct perf_top_browser *browser)
{
struct perf_top *top = browser->b.priv;
+ u64 top_idx = browser->b.top_idx;
browser->root = RB_ROOT;
browser->b.top = NULL;
@@ -82,7 +83,29 @@ static void perf_top_browser__update_rb_tree(struct perf_top_browser *browser)
if (browser->sym_width + browser->dso_width > browser->b.width - 29)
browser->sym_width = browser->b.width - browser->dso_width - 29;
}
+
+ /*
+ * Adjust the ui_browser indexes since the entries in the browser->root
+ * rb_tree may have changed, then seek it from start, so that we get a
+ * possible new top of the screen.
+ */
browser->b.nr_entries = top->rb_entries;
+
+ if (top_idx >= browser->b.nr_entries) {
+ if (browser->b.height >= browser->b.nr_entries)
+ top_idx = browser->b.nr_entries - browser->b.height;
+ else
+ top_idx = 0;
+ }
+
+ if (browser->b.index >= top_idx + browser->b.height)
+ browser->b.index = top_idx + browser->b.index - browser->b.top_idx;
+
+ if (browser->b.index >= browser->b.nr_entries)
+ browser->b.index = browser->b.nr_entries - 1;
+
+ browser->b.top_idx = top_idx;
+ browser->b.seek(&browser->b, top_idx, SEEK_SET);
}
static void perf_top_browser__annotate(struct perf_top_browser *browser)