diff options
Diffstat (limited to 'tools/kvm/kvm_stat/kvm_stat')
| -rwxr-xr-x | tools/kvm/kvm_stat/kvm_stat | 55 |
1 files changed, 47 insertions, 8 deletions
diff --git a/tools/kvm/kvm_stat/kvm_stat b/tools/kvm/kvm_stat/kvm_stat index 6838de38ecb5..1276b88937c0 100755 --- a/tools/kvm/kvm_stat/kvm_stat +++ b/tools/kvm/kvm_stat/kvm_stat @@ -844,8 +844,7 @@ class Stats(object): self.values[key] = (newval, newdelta) return self.values -DELAY_INITIAL = 0.25 -DELAY_REGULAR = 3.0 +DELAY_DEFAULT = 3.0 MAX_GUEST_NAME_LEN = 48 MAX_REGEX_LEN = 44 DEFAULT_REGEX = r'^[^\(]*$' @@ -856,6 +855,8 @@ class Tui(object): def __init__(self, stats): self.stats = stats self.screen = None + self._delay_initial = 0.25 + self._delay_regular = DELAY_DEFAULT def __enter__(self): """Initialises curses for later use. Based on curses.wrapper @@ -1027,6 +1028,7 @@ class Tui(object): ' p filter by PID', ' q quit', ' r reset stats', + ' s set update interval', ' x toggle reporting of stats for individual child trace' ' events', 'Any other key refreshes statistics immediately') @@ -1106,10 +1108,41 @@ class Tui(object): self.refresh_header(pid) self.update_pid(pid) break - except ValueError: msg = '"' + str(pid) + '": Not a valid pid' + def show_set_update_interval(self): + """Draws update interval selection mask.""" + msg = '' + while True: + self.screen.erase() + self.screen.addstr(0, 0, 'Set update interval (defaults to %fs).' % + DELAY_DEFAULT, curses.A_BOLD) + self.screen.addstr(4, 0, msg) + self.screen.addstr(2, 0, 'Change delay from %.1fs to ' % + self._delay_regular) + curses.echo() + val = self.screen.getstr() + curses.noecho() + + try: + if len(val) > 0: + delay = float(val) + if delay < 0.1: + msg = '"' + str(val) + '": Value must be >=0.1' + continue + if delay > 25.5: + msg = '"' + str(val) + '": Value must be <=25.5' + continue + else: + delay = DELAY_DEFAULT + self._delay_regular = delay + break + + except ValueError: + msg = '"' + str(val) + '": Invalid value' + self.refresh_header() + def show_vm_selection_by_guest_name(self): """Draws guest selection mask. @@ -1156,14 +1189,14 @@ class Tui(object): def show_stats(self): """Refreshes the screen and processes user input.""" - sleeptime = DELAY_INITIAL + sleeptime = self._delay_initial self.refresh_header() start = 0.0 # result based on init value never appears on screen while True: self.refresh_body(time.time() - start) curses.halfdelay(int(sleeptime * 10)) start = time.time() - sleeptime = DELAY_REGULAR + sleeptime = self._delay_regular try: char = self.screen.getkey() if char == 'c': @@ -1174,23 +1207,28 @@ class Tui(object): curses.curs_set(1) self.show_filter_selection() curses.curs_set(0) - sleeptime = DELAY_INITIAL + sleeptime = self._delay_initial if char == 'g': curses.curs_set(1) self.show_vm_selection_by_guest_name() curses.curs_set(0) - sleeptime = DELAY_INITIAL + sleeptime = self._delay_initial if char == 'h': self.show_help_interactive() if char == 'p': curses.curs_set(1) self.show_vm_selection_by_pid() curses.curs_set(0) - sleeptime = DELAY_INITIAL + sleeptime = self._delay_initial if char == 'q': break if char == 'r': self.stats.reset() + if char == 's': + curses.curs_set(1) + self.show_set_update_interval() + curses.curs_set(0) + sleeptime = self._delay_initial if char == 'x': self.update_drilldown() except KeyboardInterrupt: @@ -1267,6 +1305,7 @@ Interactive Commands: p filter by PID q quit r reset stats + s set update interval x toggle reporting of stats for individual child trace events Press any other key to refresh statistics immediately. """ |