提交 3b6ed988 编写于 作者: A Arnaldo Carvalho de Melo 提交者: Ingo Molnar

perf top: Use all the lines in the screen

By querying the current number of rows, if the user specifies
the number of entries, use that instead. If the user uses the
'e' command to change the number of lines 0 will mean do it
automatically, any other number disables the auto resizing.
Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
LKML-Reference: <1258407027-384-2-git-send-email-acme@infradead.org>
Signed-off-by: NIngo Molnar <mingo@elte.hu>
上级 dc79c0fc
......@@ -60,7 +60,7 @@ static int system_wide = 0;
static int default_interval = 0;
static int count_filter = 5;
static int print_entries = 15;
static int print_entries;
static int target_pid = -1;
static int inherit = 0;
......@@ -115,6 +115,36 @@ struct sym_entry {
* Source functions
*/
/* most GUI terminals set LINES (although some don't export it) */
static int term_rows(void)
{
char *lines_string = getenv("LINES");
int n_lines;
if (lines_string && (n_lines = atoi(lines_string)) > 0)
return n_lines;
#ifdef TIOCGWINSZ
else {
struct winsize ws;
if (!ioctl(1, TIOCGWINSZ, &ws) && ws.ws_row)
return ws.ws_row;
}
#endif
return 25;
}
static void update_print_entries(void)
{
print_entries = term_rows();
if (print_entries > 9)
print_entries -= 9;
}
static void sig_winch_handler(int sig __used)
{
update_print_entries();
}
static void parse_source(struct sym_entry *syme)
{
struct symbol *sym;
......@@ -668,6 +698,11 @@ static void handle_keypress(int c)
break;
case 'e':
prompt_integer(&print_entries, "Enter display entries (lines)");
if (print_entries == 0) {
update_print_entries();
signal(SIGWINCH, sig_winch_handler);
} else
signal(SIGWINCH, SIG_DFL);
break;
case 'E':
if (nr_counters > 1) {
......@@ -1228,5 +1263,10 @@ int cmd_top(int argc, const char **argv, const char *prefix __used)
if (target_pid != -1 || profile_cpu != -1)
nr_cpus = 1;
if (print_entries == 0) {
update_print_entries();
signal(SIGWINCH, sig_winch_handler);
}
return __cmd_top();
}
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