diff options
Diffstat (limited to 'tools/kvm/kvm_stat/kvm_stat')
| -rwxr-xr-x | tools/kvm/kvm_stat/kvm_stat | 46 |
1 files changed, 34 insertions, 12 deletions
diff --git a/tools/kvm/kvm_stat/kvm_stat b/tools/kvm/kvm_stat/kvm_stat index 8f1874c7fd8e..f47d81a18ab1 100755 --- a/tools/kvm/kvm_stat/kvm_stat +++ b/tools/kvm/kvm_stat/kvm_stat @@ -974,15 +974,17 @@ DELAY_DEFAULT = 3.0 MAX_GUEST_NAME_LEN = 48 MAX_REGEX_LEN = 44 SORT_DEFAULT = 0 +MIN_DELAY = 0.1 +MAX_DELAY = 25.5 class Tui(object): """Instruments curses to draw a nice text ui.""" - def __init__(self, stats): + def __init__(self, stats, opts): self.stats = stats self.screen = None self._delay_initial = 0.25 - self._delay_regular = DELAY_DEFAULT + self._delay_regular = opts.set_delay self._sorting = SORT_DEFAULT self._display_guests = 0 @@ -1282,7 +1284,8 @@ class Tui(object): ' p filter by guest name/PID', ' q quit', ' r reset stats', - ' s set update interval', + ' s set delay between refreshs (value range: ' + '%s-%s secs)' % (MIN_DELAY, MAX_DELAY), ' x toggle reporting of stats for individual child trace' ' events', 'Any other key refreshes statistics immediately') @@ -1348,11 +1351,9 @@ class Tui(object): 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' + err = is_delay_valid(delay) + if err is not None: + msg = err continue else: delay = DELAY_DEFAULT @@ -1488,7 +1489,7 @@ def batch(stats): pass -def log(stats): +def log(stats, opts): """Prints statistics as reiterating key block, multiple value blocks.""" keys = sorted(stats.get().keys()) @@ -1506,7 +1507,7 @@ def log(stats): banner_repeat = 20 while True: try: - time.sleep(1) + time.sleep(opts.set_delay) if line % banner_repeat == 0: banner() statline() @@ -1515,6 +1516,16 @@ def log(stats): break +def is_delay_valid(delay): + """Verify delay is in valid value range.""" + msg = None + if delay < MIN_DELAY: + msg = '"' + str(delay) + '": Delay must be >=%s' % MIN_DELAY + if delay > MAX_DELAY: + msg = '"' + str(delay) + '": Delay must be <=%s' % MAX_DELAY + return msg + + def get_options(): """Returns processed program arguments.""" description_text = """ @@ -1604,6 +1615,13 @@ Press any other key to refresh statistics immediately. default=0, help='restrict statistics to pid', ) + argparser.add_argument('-s', '--set-delay', + type=float, + default=DELAY_DEFAULT, + metavar='DELAY', + help='set delay between refreshs (value range: ' + '%s-%s secs)' % (MIN_DELAY, MAX_DELAY), + ) argparser.add_argument('-t', '--tracepoints', action='store_true', default=False, @@ -1675,6 +1693,10 @@ def main(): sys.stderr.write('Did you use a (unsupported) tid instead of a pid?\n') sys.exit('Specified pid does not exist.') + err = is_delay_valid(options.set_delay) + if err is not None: + sys.exit('Error: ' + err) + stats = Stats(options) if options.fields == 'help': @@ -1686,9 +1708,9 @@ def main(): sys.exit(0) if options.log: - log(stats) + log(stats, options) elif not options.once: - with Tui(stats) as tui: + with Tui(stats, options) as tui: tui.show_stats() else: batch(stats) |