tools/kvm_stat: full PEP8 compliance
Provides all missing empty lines as required for full PEP compliance. Signed-off-by: Stefan Raspl <raspl@linux.vnet.ibm.com> Reviewed-by: Marc Hartmayer <mhartmay@linux.vnet.ibm.com> Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
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a183606937
Коммит
692c7f6deb
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@ -224,6 +224,7 @@ IOCTL_NUMBERS = {
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'RESET': 0x00002403,
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}
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class Arch(object):
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"""Encapsulates global architecture specific data.
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@ -254,12 +255,14 @@ class Arch(object):
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return ArchX86(SVM_EXIT_REASONS)
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return
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class ArchX86(Arch):
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def __init__(self, exit_reasons):
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self.sc_perf_evt_open = 298
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self.ioctl_numbers = IOCTL_NUMBERS
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self.exit_reasons = exit_reasons
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class ArchPPC(Arch):
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def __init__(self):
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self.sc_perf_evt_open = 319
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@ -274,12 +277,14 @@ class ArchPPC(Arch):
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self.ioctl_numbers['SET_FILTER'] = 0x80002406 | char_ptr_size << 16
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self.exit_reasons = {}
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class ArchA64(Arch):
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def __init__(self):
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self.sc_perf_evt_open = 241
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self.ioctl_numbers = IOCTL_NUMBERS
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self.exit_reasons = AARCH64_EXIT_REASONS
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class ArchS390(Arch):
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def __init__(self):
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self.sc_perf_evt_open = 331
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@ -341,6 +346,7 @@ def get_filters():
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libc = ctypes.CDLL('libc.so.6', use_errno=True)
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syscall = libc.syscall
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class perf_event_attr(ctypes.Structure):
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"""Struct that holds the necessary data to set up a trace event.
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@ -369,6 +375,7 @@ class perf_event_attr(ctypes.Structure):
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self.size = ctypes.sizeof(self)
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self.read_format = PERF_FORMAT_GROUP
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def perf_event_open(attr, pid, cpu, group_fd, flags):
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"""Wrapper for the sys_perf_evt_open() syscall.
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@ -394,6 +401,7 @@ PERF_FORMAT_GROUP = 1 << 3
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PATH_DEBUGFS_TRACING = '/sys/kernel/debug/tracing'
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PATH_DEBUGFS_KVM = '/sys/kernel/debug/kvm'
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class Group(object):
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"""Represents a perf event group."""
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@ -426,6 +434,7 @@ class Group(object):
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struct.unpack(read_format,
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os.read(self.events[0].fd, length))))
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class Event(object):
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"""Represents a performance event and manages its life cycle."""
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def __init__(self, name, group, trace_cpu, trace_pid, trace_point,
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@ -509,6 +518,7 @@ class Event(object):
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"""Resets the count of the trace event in the kernel."""
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fcntl.ioctl(self.fd, ARCH.ioctl_numbers['RESET'], 0)
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class TracepointProvider(object):
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"""Data provider for the stats class.
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@ -650,6 +660,7 @@ class TracepointProvider(object):
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ret[name] += val
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return ret
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class DebugfsProvider(object):
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"""Provides data from the files that KVM creates in the kvm debugfs
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folder."""
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@ -719,6 +730,7 @@ class DebugfsProvider(object):
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except IOError:
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return 0
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class Stats(object):
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"""Manages the data providers and the data they provide.
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@ -790,6 +802,7 @@ class Stats(object):
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LABEL_WIDTH = 40
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NUMBER_WIDTH = 10
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class Tui(object):
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"""Instruments curses to draw a nice text ui."""
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def __init__(self, stats):
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@ -859,6 +872,7 @@ class Tui(object):
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len('Current'), 'Current')
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row = 3
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stats = self.stats.get()
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def sortkey(x):
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if stats[x][1]:
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return (-stats[x][1], -stats[x][0])
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@ -966,6 +980,7 @@ class Tui(object):
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except curses.error:
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continue
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def batch(stats):
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"""Prints statistics in a key, value format."""
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try:
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@ -978,13 +993,16 @@ def batch(stats):
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except KeyboardInterrupt:
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pass
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def log(stats):
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"""Prints statistics as reiterating key block, multiple value blocks."""
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keys = sorted(stats.get().iterkeys())
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def banner():
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for k in keys:
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print '%s' % k,
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print
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def statline():
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s = stats.get()
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for k in keys:
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@ -1002,6 +1020,7 @@ def log(stats):
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except KeyboardInterrupt:
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break
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def get_options():
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"""Returns processed program arguments."""
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description_text = """
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@ -1072,6 +1091,7 @@ Requirements:
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(options, _) = optparser.parse_args(sys.argv)
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return options
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def get_providers(options):
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"""Returns a list of data providers depending on the passed options."""
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providers = []
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@ -1085,6 +1105,7 @@ def get_providers(options):
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return providers
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def check_access(options):
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"""Exits if the current user can't access all needed directories."""
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if not os.path.exists('/sys/kernel/debug'):
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@ -1114,6 +1135,7 @@ def check_access(options):
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return options
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def main():
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options = get_options()
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options = check_access(options)
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