diff options
Diffstat (limited to 'scripts/kvm')
| -rwxr-xr-x | scripts/kvm/kvm_stat | 153 |
1 files changed, 82 insertions, 71 deletions
diff --git a/scripts/kvm/kvm_stat b/scripts/kvm/kvm_stat index 6f0692d60a..9f943ef202 100755 --- a/scripts/kvm/kvm_stat +++ b/scripts/kvm/kvm_stat @@ -285,8 +285,6 @@ def detect_platform(): s390_init() return -detect_platform() - def walkdir(path): """Returns os.walk() data for specified directory. @@ -453,7 +451,7 @@ class Stats: return True return re.match(self.fields_filter, key) is not None self.values = dict() - for d in providers: + for d in self.providers: provider_fields = [key for key in d.fields() if wanted(key)] for key in provider_fields: self.values[key] = None @@ -462,7 +460,7 @@ class Stats: self.fields_filter = fields_filter self._update() def get(self): - for d in providers: + for d in self.providers: new = d.read() for key in d.fields(): oldval = self.values.get(key, (0, 0)) @@ -473,20 +471,6 @@ class Stats: self.values[key] = (newval, newdelta) return self.values -if not os.path.exists('/sys/kernel/debug'): - sys.stderr.write('Please enable CONFIG_DEBUG_FS in your kernel.') - sys.exit(1) -if not os.path.exists(PATH_DEBUGFS_KVM): - sys.stderr.write("Please make sure, that debugfs is mounted and " - "readable by the current user:\n" - "('mount -t debugfs debugfs /sys/kernel/debug')\n" - "Also ensure, that the kvm modules are loaded.\n") - sys.exit(1) -if not os.path.exists(PATH_DEBUGFS_TRACING): - sys.stderr.write("Please make {0} readable by the current user.\n" - .format(PATH_DEBUGFS_TRACING)) - sys.exit(1) - LABEL_WIDTH = 40 NUMBER_WIDTH = 10 @@ -576,56 +560,83 @@ def log(stats): statline() line += 1 -options = optparse.OptionParser() -options.add_option('-1', '--once', '--batch', - action = 'store_true', - default = False, - dest = 'once', - help = 'run in batch mode for one second', - ) -options.add_option('-l', '--log', - action = 'store_true', - default = False, - dest = 'log', - help = 'run in logging mode (like vmstat)', - ) -options.add_option('-t', '--tracepoints', - action = 'store_true', - default = False, - dest = 'tracepoints', - help = 'retrieve statistics from tracepoints', - ) -options.add_option('-d', '--debugfs', - action = 'store_true', - default = False, - dest = 'debugfs', - help = 'retrieve statistics from debugfs', - ) -options.add_option('-f', '--fields', - action = 'store', - default = None, - dest = 'fields', - help = 'fields to display (regex)', - ) -(options, args) = options.parse_args(sys.argv) - -providers = [] -if options.tracepoints: - providers.append(TracepointProvider()) -if options.debugfs: - providers.append(DebugfsProvider()) - -if len(providers) == 0: - try: - providers = [TracepointProvider()] - except: - providers = [DebugfsProvider()] - -stats = Stats(providers, fields = options.fields) - -if options.log: - log(stats) -elif not options.once: - curses.wrapper(tui, stats) -else: - batch(stats) +def get_options(): + optparser = optparse.OptionParser() + optparser.add_option('-1', '--once', '--batch', + action = 'store_true', + default = False, + dest = 'once', + help = 'run in batch mode for one second', + ) + optparser.add_option('-l', '--log', + action = 'store_true', + default = False, + dest = 'log', + help = 'run in logging mode (like vmstat)', + ) + optparser.add_option('-t', '--tracepoints', + action = 'store_true', + default = False, + dest = 'tracepoints', + help = 'retrieve statistics from tracepoints', + ) + optparser.add_option('-d', '--debugfs', + action = 'store_true', + default = False, + dest = 'debugfs', + help = 'retrieve statistics from debugfs', + ) + optparser.add_option('-f', '--fields', + action = 'store', + default = None, + dest = 'fields', + help = 'fields to display (regex)', + ) + (options, _) = optparser.parse_args(sys.argv) + return options + +def get_providers(options): + providers = [] + + if options.tracepoints: + providers.append(TracepointProvider()) + if options.debugfs: + providers.append(DebugfsProvider()) + if len(providers) == 0: + providers.append(TracepointProvider()) + + return providers + +def check_access(): + if not os.path.exists('/sys/kernel/debug'): + sys.stderr.write('Please enable CONFIG_DEBUG_FS in your kernel.') + sys.exit(1) + + if not os.path.exists(PATH_DEBUGFS_KVM): + sys.stderr.write("Please make sure, that debugfs is mounted and " + "readable by the current user:\n" + "('mount -t debugfs debugfs /sys/kernel/debug')\n" + "Also ensure, that the kvm modules are loaded.\n") + sys.exit(1) + + if not os.path.exists(PATH_DEBUGFS_TRACING): + sys.stderr.write("Please make {0} readable by the current user.\n" + .format(PATH_DEBUGFS_TRACING)) + sys.exit(1) + +def main(): + check_access() + detect_platform() + options = get_options() + providers = get_providers(options) + stats = Stats(providers, fields = options.fields) + + if options.log: + log(stats) + elif not options.once: + curses.wrapper(tui, stats) + else: + batch(stats) + +if __name__ == "__main__": + main() |