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ftrace: Use named ftrace buffer

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Use a buffer named "devlib" instead of using the top-level default
buffer. That will improve interop with other tools trying to collect a
trace at the same time as devlib.
This commit is contained in:
Douglas Raillard 2023-02-01 19:36:43 +00:00 committed by Marc Bonnici
parent e012b175c6
commit 3d2cdd99c5
1 changed files with 3 additions and 3 deletions
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6
devlib/collector/ftrace.py
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@ -237,7 +237,7 @@ class FtraceCollector(CollectorBase):
return self.target.read_value(self.available_functions_file).splitlines() return self.target.read_value(self.available_functions_file).splitlines()
def reset(self): def reset(self):
self.target.execute('{} reset'.format(self.target_binary), self.target.execute('{} reset -B devlib'.format(self.target_binary),
as_root=True, timeout=TIMEOUT) as_root=True, timeout=TIMEOUT)
if self.functions: if self.functions:
self.target.write_value(self.function_profile_file, 0, verify=False) self.target.write_value(self.function_profile_file, 0, verify=False)
@ -262,7 +262,7 @@ class FtraceCollector(CollectorBase):
self.target.write_value('/proc/sys/kernel/kptr_restrict', 0) self.target.write_value('/proc/sys/kernel/kptr_restrict', 0)
self.target.execute( self.target.execute(
'{} start {buffer_size} {cmdlines_size} {clock} {events} {tracer} {functions}'.format( '{} start -B devlib {buffer_size} {cmdlines_size} {clock} {events} {tracer} {functions}'.format(
self.target_binary, self.target_binary,
events=self.event_string, events=self.event_string,
tracer=tracer_string, tracer=tracer_string,
@ -307,7 +307,7 @@ class FtraceCollector(CollectorBase):
self.stop_time = time.time() self.stop_time = time.time()
if self.automark: if self.automark:
self.mark_stop() self.mark_stop()
self.target.execute('{} stop'.format(self.target_binary), self.target.execute('{} stop -B devlib'.format(self.target_binary),
timeout=TIMEOUT, as_root=True) timeout=TIMEOUT, as_root=True)
self._reset_needed = True self._reset_needed = True