CGroups controller can be mounted by specifying a "noprefix" option,
in which case attribute names are named as:
<mountpoint>/<attribute_name>
instead of the (more recent) naming schema using:
<mountpoint>/<contoller_name>.<attribute_name>
For example, Android uses the old format for backward compatibility
with user-space. Thus, it's possible in general to work on a target
system where some controller are mounted "noprefix" while others not.
This patchset adds a set of updates which allows to use the proper
attributes naming schema based on how the controller has been mounted.
This patch makes use of the Controller::_noprefix option to properly
build the attribute path. It adds also a check which reports a more
clear error in case an attribute is set which is not provided by the
controller.
Signed-off-by: Patrick Bellasi <patrick.bellasi@arm.com>
CGroups controller can be mounted by specifying a "noprefix" option,
in which case attribute names are named as:
<mountpoint>/<attribute_name>
instead of the (more recent) naming schema using:
<mountpoint>/<contoller_name>.<attribute_name>
For example, Android uses the old format for backward compatibility
with user-space. Thus, it's possible in general to work on a target
system where some controller are mounted "noprefix" while others not.
This patchset adds a set of updates which allows to use the proper
attributes naming schema based on how the controller has been mounted.
This first patch keeps track of whatever a controller has been mounted
using the noprefix option.
Signed-off-by: Patrick Bellasi <patrick.bellasi@arm.com>
This patch provides a couple of utility functions which makes it
easy to run a command under a specific CGroup or to move all tasks
from a group to another.
Signed-off-by: Patrick Bellasi <patrick.bellasi@arm.com>
The newline separator is a property of AdbConnection while the adb_shell is
just a method of the android module, thus we do not have a "self" pointer
to and AdbConnection from within the adb_shell function.
This patch fixes 8de24b5 by exposing the newline_separator used by adb_shell
as a parameter of that method and using the AdbConnection::newline_separator
to properly initialize it at executue() time.
Signed-off-by: Patrick Bellasi <patrick.bellasi@arm.com>
Executing a command as root was not possible when running it in background.
This is done in a similar way as with a standard execute call.
This was also a bug in ssh.py because if you tried to run a background command
on the target, the background function in target.py was passing the as_root
parameter which was not present in ssh.py.
Signed-off-by: Michele Di Giorgio <michele.digiorgio@arm.com>
The info statements are clobbering the "normal" output of devlib users.
This patch demote the logging to debug level. The user can still
log-report these information from the corresponding functions call site.
Signed-off-by: Patrick Bellasi <patrick.bellasi@arm.com>
This is the only info statement which is thus clobbering the "normal"
output of a client ueser for that devlib. This patch demote the logging
to debug level. The user can still log-report the output file which is also
an input parameter.
Signed-off-by: Patrick Bellasi <patrick.bellasi@arm.com>
In general we could be interested to define a common configuration to use
across different kernels. Thus, for a given set of experiments, some
trace events can be present only on some kernels and not others.
This patch introduces a check for the availability of trace events by
ensuring that we consider only those available in the kernel in use
in the target. In case of a trace event is not supported in the target
kernel we still log a warning.
Signed-off-by: Patrick Bellasi <patrick.bellasi@arm.com>
In general we could be interested to defined a common configuration to use
across different kernels. Thus, for a given set of experiments, some
functions can be present only on some kernels and not others.
This patch updates the check for the availability of functions to profile by
ensuring that we consider only functions available in the kernel in use
in the target. In case of a function cannot be profiled in the target kernel
we log a warning instead of raising an exception.
Signed-off-by: Patrick Bellasi <patrick.bellasi@arm.com>
When issuing a target.reboot(), the reset was immediately followed by a
boot() (for platforms that have it) and an attempt to connect. When
issuing a soft reset, it's possible the target is still shutting down
when the attempt to connect is made. This results in the connection
succeeding but being severed shortly thereafter.
This introduces a delay after the reset to the reboot sequence, giving
the target time to shutdown and improves the handling of EOF's that
result from failed reconnection attempts (while still being with the
allotted timeout period.
The current code used to read the attributes values for a controller uses
a "grep '' CONTROLLER.*" under the assumption that the output is a list of
file:value
However, if there is a single controller attribute, grep does not report
the file name in output thus returning an empty list at the python side.
This patch fix that issue by also switching to the usage of a shutil
implementation of the attributes parsing code.
Signed-off-by: Patrick Bellasi <patrick.bellasi@arm.com>
Get the device's ANDROID_ID. Which is
"A 64-bit number (as a hex string) that is randomly generated when the user
first sets up the device and should remain constant for the lifetime of the
user's device."
Changed get_installed to search self.executables_directory first.
This means that user provided binaries will be used over system ones.
Also added the option to not search system folders for a binary.
Juno and TC2 platfroms where ignorring big_core parameter passed in,
always setting it to their corresponding defaults. This removes that
problem, and removes the setting of the big core defaults entirely, as
they would be adentified through the regular Platform mechanism.
Functions profiling data are reported in a set of files, one for each CPU.
This patch adds the required support to collect these data into a single
JSON formatted file. Data are collected using a shutils routing on the
target side and formatted in JSON on the host side.
Signed-off-by: Patrick Bellasi <patrick.bellasi@arm.com>
Function stats can be collected while events are accumulated into a trace.
This function adds the required support to start and stop functions
profiling across a trace collection.
Signed-off-by: Patrick Bellasi <patrick.bellasi@arm.com>
FTrace allows to collect profiling stats for kernel functions.
This patch adds the initial support which allows to specify a list of
kernel function we would like to profile.
If a list of functions to profile is specified, for each specified function
we check for that function to be actually one of the available instrumented
functions which can be monitored by FTrace.
If a function is not supported, we throw an expection so that the user
is aware about the analysis which is going to do.
Signed-off-by: Patrick Bellasi <patrick.bellasi@arm.com>
All ftrace generated files are present under a common base folder.
This patch updates the FtraceCollector API to exposes just the common
base folder from where all the other paths can be generated.
This is a refactoring patch which makes it easier to add further attributes.
Signed-off-by: Patrick Bellasi <patrick.bellasi@arm.com>
