perf top: Fix -E option behavior
The -E/--entries option controls how many lines to be printed on stdio
output but it doesn't work as it should be:
If -E option is specified, print that many lines regardless of current
window size, if not automatically adjust number of lines printed to fit
into the window size.
Reported-by: Minchan Kim <minchan@kernel.org>
Tested-by: Jiri Olsa <jolsa@redhat.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/1368497347-9628-2-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index df9e06a..81adcaf 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -70,10 +70,11 @@
static volatile int done;
+#define HEADER_LINE_NR 5
+
static void perf_top__update_print_entries(struct perf_top *top)
{
- if (top->print_entries > 9)
- top->print_entries -= 9;
+ top->print_entries = top->winsize.ws_row - HEADER_LINE_NR;
}
static void perf_top__sig_winch(int sig __maybe_unused,
@@ -82,13 +83,6 @@
struct perf_top *top = arg;
get_term_dimensions(&top->winsize);
- if (!top->print_entries
- || (top->print_entries+4) > top->winsize.ws_row) {
- top->print_entries = top->winsize.ws_row;
- } else {
- top->print_entries += 4;
- top->winsize.ws_row = top->print_entries;
- }
perf_top__update_print_entries(top);
}
@@ -296,10 +290,10 @@
top->hide_user_symbols,
top->hide_kernel_symbols);
hists__output_recalc_col_len(&top->sym_evsel->hists,
- top->winsize.ws_row - 3);
+ top->print_entries - printed);
putchar('\n');
hists__fprintf(&top->sym_evsel->hists, false,
- top->winsize.ws_row - 4 - printed, win_width, stdout);
+ top->print_entries - printed, win_width, stdout);
}
static void prompt_integer(int *target, const char *msg)
@@ -477,7 +471,6 @@
perf_top__sig_winch(SIGWINCH, NULL, top);
sigaction(SIGWINCH, &act, NULL);
} else {
- perf_top__sig_winch(SIGWINCH, NULL, top);
signal(SIGWINCH, SIG_DFL);
}
break;