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[Qemu-devel] [PATCH v2 01/34] scripts/kvm/kvm_stat: Cleanup of multiple
From: |
Janosch Frank |
Subject: |
[Qemu-devel] [PATCH v2 01/34] scripts/kvm/kvm_stat: Cleanup of multiple imports |
Date: |
Mon, 11 Jan 2016 16:17:31 +0100 |
Removed multiple imports of the same module and moved all imports to
the top.
It is not necessary to import a module each time one of its
functions/classes is used.
For readability each import should get its own line.
Signed-off-by: Janosch Frank <address@hidden>
---
scripts/kvm/kvm_stat | 26 +++++++++++---------------
1 file changed, 11 insertions(+), 15 deletions(-)
diff --git a/scripts/kvm/kvm_stat b/scripts/kvm/kvm_stat
index 7e5d256..3fadbfb 100755
--- a/scripts/kvm/kvm_stat
+++ b/scripts/kvm/kvm_stat
@@ -12,8 +12,16 @@
# the COPYING file in the top-level directory.
import curses
-import sys, os, time, optparse, ctypes
-from ctypes import *
+import sys
+import os
+import time
+import optparse
+import ctypes
+import fcntl
+import resource
+import struct
+import re
+from collections import defaultdict
class DebugfsProvider(object):
def __init__(self):
@@ -285,12 +293,10 @@ filters['kvm_userspace_exit'] = ('reason',
invert(userspace_exit_reasons))
if exit_reasons:
filters['kvm_exit'] = ('exit_reason', invert(exit_reasons))
-import struct, array
-
libc = ctypes.CDLL('libc.so.6')
syscall = libc.syscall
get_errno = libc.__errno_location
-get_errno.restype = POINTER(c_int)
+get_errno.restype = ctypes.POINTER(ctypes.c_int)
class perf_event_attr(ctypes.Structure):
_fields_ = [('type', ctypes.c_uint32),
@@ -334,8 +340,6 @@ PERF_FORMAT_TOTAL_TIME_RUNNING = 1 << 1
PERF_FORMAT_ID = 1 << 2
PERF_FORMAT_GROUP = 1 << 3
-import re
-
sys_tracing = '/sys/kernel/debug/tracing'
class Group(object):
@@ -378,17 +382,13 @@ class Event(object):
err = get_errno()[0]
raise Exception('perf_event_open failed, errno = ' + err.__str__())
if filter:
- import fcntl
fcntl.ioctl(fd, ioctl_numbers['SET_FILTER'], filter)
self.fd = fd
def enable(self):
- import fcntl
fcntl.ioctl(self.fd, ioctl_numbers['ENABLE'], 0)
def disable(self):
- import fcntl
fcntl.ioctl(self.fd, ioctl_numbers['DISABLE'], 0)
def reset(self):
- import fcntl
fcntl.ioctl(self.fd, ioctl_numbers['RESET'], 0)
class TracepointProvider(object):
@@ -426,7 +426,6 @@ class TracepointProvider(object):
def _setup(self, _fields):
self._fields = _fields
cpus = self._online_cpus()
- import resource
nfiles = len(cpus) * 1000
resource.setrlimit(resource.RLIMIT_NOFILE, (nfiles, nfiles))
events = []
@@ -454,7 +453,6 @@ class TracepointProvider(object):
else:
event.disable()
def read(self):
- from collections import defaultdict
ret = defaultdict(int)
for group in self.group_leaders:
for name, val in group.read().iteritems():
@@ -468,7 +466,6 @@ class Stats:
self._update()
def _update(self):
def wanted(key):
- import re
if not self.fields_filter:
return True
return re.match(self.fields_filter, key) is not None
@@ -640,7 +637,6 @@ stats = Stats(providers, fields = options.fields)
if options.log:
log(stats)
elif not options.once:
- import curses.wrapper
curses.wrapper(tui, stats)
else:
batch(stats)
--
2.3.0
- [Qemu-devel] [PATCH v2 00/34] kvm_stat: Cleanup and fixup, Janosch Frank, 2016/01/11
- [Qemu-devel] [PATCH v2 07/34] scripts/kvm/kvm_stat: Cleanup of path variables, Janosch Frank, 2016/01/11
- [Qemu-devel] [PATCH v2 17/34] scripts/kvm/kvm_stat: Rename _perf_event_open, Janosch Frank, 2016/01/11
- [Qemu-devel] [PATCH v2 23/34] scripts/kvm/kvm_stat: Cleanup of Groups class, Janosch Frank, 2016/01/11
- [Qemu-devel] [PATCH v2 11/34] scripts/kvm/kvm_stat: Rename variables that redefine globals, Janosch Frank, 2016/01/11
- [Qemu-devel] [PATCH v2 19/34] scripts/kvm/kvm_stat: Cleanup of TracepointProvider, Janosch Frank, 2016/01/11
- [Qemu-devel] [PATCH v2 15/34] scripts/kvm/kvm_stat: Cleanup of platform detection, Janosch Frank, 2016/01/11
- [Qemu-devel] [PATCH v2 18/34] scripts/kvm/kvm_stat: Introduce properties for providers, Janosch Frank, 2016/01/11
- [Qemu-devel] [PATCH v2 01/34] scripts/kvm/kvm_stat: Cleanup of multiple imports,
Janosch Frank <=
- [Qemu-devel] [PATCH v2 16/34] scripts/kvm/kvm_stat: Make cpu detection a function, Janosch Frank, 2016/01/11
- [Qemu-devel] [PATCH v2 12/34] scripts/kvm/kvm_stat: Moved DebugfsProvider, Janosch Frank, 2016/01/11
- [Qemu-devel] [PATCH v2 25/34] scripts/kvm/kvm_stat: Group arch specific data, Janosch Frank, 2016/01/11
- [Qemu-devel] [PATCH v2 04/34] scripts/kvm/kvm_stat: Removed unneeded PERF constants, Janosch Frank, 2016/01/11
- [Qemu-devel] [PATCH v2 02/34] scripts/kvm/kvm_stat: Replaced os.listdir with os.walk, Janosch Frank, 2016/01/11
- [Qemu-devel] [PATCH v2 08/34] scripts/kvm/kvm_stat: Improve debugfs access checking, Janosch Frank, 2016/01/11
- [Qemu-devel] [PATCH v2 29/34] scripts/kvm/kvm_stat: Cleanup and pre-init perf_event_attr, Janosch Frank, 2016/01/11
- [Qemu-devel] [PATCH v2 03/34] scripts/kvm/kvm_stat: Make constants uppercase, Janosch Frank, 2016/01/11
- [Qemu-devel] [PATCH v2 06/34] scripts/kvm/kvm_stat: Invert dictionaries, Janosch Frank, 2016/01/11
- [Qemu-devel] [PATCH v2 10/34] scripts/kvm/kvm_stat: Fix spaces around keyword assignments, Janosch Frank, 2016/01/11