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import os
import config.config as conf
from common import is_device,num_cpus
from operator import methodcaller
from run.executable.ftcat import FTcat,Executable
class Tracer(object):
def __init__(self, name, output_dir, exact=False):
self.name = name
self.output_dir = output_dir
self.bins = []
self.exact=exact
def get_name(self):
return self.name
def is_exact(self):
return self.exact
def start_tracing(self):
map(methodcaller("execute"), self.bins)
def stop_tracing(self):
map(methodcaller('terminate'), self.bins)
map(methodcaller('wait'), self.bins)
class LinuxTracer(Tracer):
EVENT_ROOT = "/sys/kernel/debug/tracing"
LITMUS_EVENTS = "%s/events/litmus" % EVENT_ROOT
def __init__(self, output_dir):
super(LinuxTracer, self).__init__("Trace-cmd / Kernelshark", output_dir)
extra_args = ["record", # "-e", "sched:sched_switch",
"-e", "litmus:*",
"-o", "%s/%s" % (output_dir, conf.FILES['linux_data'])]
stdout = open('%s/trace-cmd-stdout.txt' % self.output_dir, 'w')
stderr = open('%s/trace-cmd-stderr.txt' % self.output_dir, 'w')
execute = Executable(conf.BINS['trace-cmd'], extra_args,
stdout, stderr, output_dir)
self.bins.append(execute)
@staticmethod
def enabled():
return conf.BINS['trace-cmd'] and os.path.exists(LinuxTracer.LITMUS_EVENTS)
def stop_tracing(self):
map(methodcaller('interrupt'), self.bins)
map(methodcaller('wait'), self.bins)
class LogTracer(Tracer):
DEVICE_STR = '/dev/litmus/log'
def __init__(self, output_dir):
super(LogTracer, self).__init__("Logger", output_dir)
out_file = open("%s/%s" % (self.output_dir, conf.FILES['log_data']), 'w')
cat = (Executable("/bin/cat", [LogTracer.DEVICE_STR]))
cat.stdout_file = out_file
self.bins.append(cat)
@staticmethod
def enabled():
return is_device(LogTracer.DEVICE_STR)
def stop_tracing(self):
map(methodcaller('interrupt'), self.bins)
map(methodcaller('wait', False), self.bins)
class SchedTracer(Tracer):
DEVICE_STR = '/dev/litmus/sched_trace'
def __init__(self, output_dir):
super(SchedTracer, self).__init__("Sched Trace", output_dir)
if SchedTracer.enabled():
for cpu in range(num_cpus()):
# Executable will close the stdout/stderr files
stdout_f = open('%s/st-%d.bin' % (self.output_dir, cpu), 'w')
stderr_f = open('%s/st-%d-stderr.txt' % (self.output_dir, cpu), 'w')
dev = '{0}{1}'.format(SchedTracer.DEVICE_STR, cpu)
ftc = FTcat(conf.BINS['ftcat'], stdout_f, stderr_f, dev,
conf.SCHED_EVENTS, cpu=cpu)
self.bins.append(ftc)
@staticmethod
def enabled():
return is_device("%s%d" % (SchedTracer.DEVICE_STR, 0))
class OverheadTracer(Tracer):
DEVICE_STR = '/dev/litmus/ft_cpu_trace0'
MSG_DEVICE_STR = '/dev/litmus/ft_msg_trace0'
def __init__(self, output_dir):
super(OverheadTracer, self).__init__("Overhead Trace", output_dir, True)
stdout_f = open('{0}/{1}'.format(self.output_dir, conf.FILES['ft_data']), 'w')
stderr_f = open('{0}/{1}.stderr.txt'.format(self.output_dir, conf.FILES['ft_data']), 'w')
ftc = FTcat(conf.BINS['ftcat'], stdout_f, stderr_f,
OverheadTracer.DEVICE_STR, conf.OVH_ALL_EVENTS)
stdout_f2 = open('{0}/{1}'.format(self.output_dir, conf.FILES['ft_msg_data']), 'w')
stderr_f2 = open('{0}/{1}.stderr.txt'.format(self.output_dir, conf.FILES['ft_msg_data']), 'w')
ftc2 = FTcat(conf.BINS['ftcat'], stdout_f2, stderr_f2,
OverheadTracer.MSG_DEVICE_STR, conf.OVH_MSG_EVENTS)
self.bins.append(ftc)
self.bins.append(ftc2)
@staticmethod
def enabled():
return is_device(OverheadTracer.DEVICE_STR)
class PerfTracer(Tracer):
def __init__(self, output_dir):
super(PerfTracer, self).__init__("CPU perf counters", output_dir)
@staticmethod
def enabled():
return False
tracers = {}
def register_tracer(tracer, name):
tracers[name] = tracer
def get_tracer_types(names):
error = True # Error if name is not present
errors = []
if not names:
# Just return all enabled tracers if none specified
names = tracers.keys()
error = False
ret = []
for name in names:
if name not in tracers:
raise ValueError("Invalid tracer '%s', valid names are: %s" %
(name, tracers.keys()))
if tracers[name].enabled():
ret += [ tracers[name] ]
elif error:
errors += ["Tracer '%s' requested, but not enabled." % name]
if errors:
raise ValueError("Check your kernel compile configuration!\n" +
"\n".join(errors))
return ret
register_tracer(LinuxTracer, "kernelshark")
register_tracer(LogTracer, "log")
register_tracer(SchedTracer, "sched")
register_tracer(OverheadTracer, "overhead")
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