diff options
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/perf/builtin-top.c | 42 |
1 files changed, 41 insertions, 1 deletions
diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c index 6613f98..3af9520 100644 --- a/tools/perf/builtin-top.c +++ b/tools/perf/builtin-top.c @@ -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(); } |