leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity

perf top: Use all the lines in the screen

Browse Source 
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: Arnaldo 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: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Arnaldo Carvalho de Melo 2009-11-16 19:30:27 -02:00 committed by Ingo Molnar
parent dc79c0fc08
commit 3b6ed98895
1 changed files with 41 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

42
tools/perf/builtin-top.c
View File

@ -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();
}