By default, kernel event logger is using the system timer. But on
some platforms where the timer driver maintains the system timer
cycle accumulator in software, such as ones using the LOAPIC timer,
the system timer behavior leads to timestamp errors. For example,
the timer interrupt is logged with a wrong timestamp since the HW
timer value has been reset (periodic mode) but accumulated value not
updated yet (done later in the ISR).
This patch is adding the possibility to register a timer callback
function that will be used by the kernel event logger. For example,
on Quark SE, this allows using RTC or AON counter which accuracy is
sufficient and behavior more straight forward compared to system
timer.
Change-Id: I754c7557350ef29fc10701e62a35a5425e035f11
Signed-off-by: Fabrice Olivero <fabrice.olivero@intel.com>
Added CONFIG_KERNEL_EVENT_PROFILER_DYNAMIC flag for enabling that
capability. When set, nothing will be logged by default
Change-Id: I03552483e5a6bfd9e2505eda56908f0d0ae98618
Signed-off-by: Fabrice Olivero <fabrice.olivero@intel.com>
OS tick period (usually 10 ms) is not sufficiently precise for task
execution analysis (like processing CPU load per context)
With that modification, the timestamp used by the kernel event logger
is 32-bit LSB of platform HW timer (for example Lakemont APIC timer
for Quark SE).
This timer period is very small and leads to timestamp wraparound
happening quite often (e.g. every 134s for Quark SE).
This wraparound must be considered when analyzing kernel event logger
data and care must be taken when tickless idle is enabled and sleep
duration can exceed maximum HW timer value.
Change-Id: Idc545da8f828a7357a69d83ff25c9afd09dab3c4
Signed-off-by: Fabrice Olivero <fabrice.olivero@intel.com>
Mostly SoC initialization and some kernel subsystems, but also some
device drivers like the interrupt controllers.
Change-Id: I8dc1844c33acd877c075b6b03558fdca6f87500b
Signed-off-by: Benjamin Walsh <benjamin.walsh@windriver.com>
This is the last step before obsoleting DEVICE_DEFINE() and
DEVICE_INIT_CONFIG_DEFINE().
Change-Id: Ica4257662969048083ab9839872b4b437b8b351b
Signed-off-by: Benjamin Walsh <benjamin.walsh@windriver.com>
Rename it to DEVICE_DEFINE() so that it fits in the 'device' namespace.
Change-Id: I3af3a39cf9154359b31d22729d0db9f710cd202b
Signed-off-by: Benjamin Walsh <benjamin.walsh@windriver.com>
Rename it to DEVICE_INIT_CONFIG_DEFINE(), because (a) it was not fitting
in any namespace and (b) it is not used to declare, but rather define a
object.
Change-Id: I1da5822f06b85a9fb024b5b184afd0ccc01012ec
Signed-off-by: Benjamin Walsh <benjamin.walsh@windriver.com>
Removed old style file description and documnetation and apply
doxygen synatx.
Change-Id: I3ac9f06d4f574bf3c79c6f6044cec3a7e2f6e4c8
Signed-off-by: Anas Nashif <anas.nashif@intel.com>
The system crashed if an interrupt occurs before the
kernel event logger is initialized (Error seen on Galileo).
This patch adds a condition to check if the logger is ready
to operate.
Change-Id: I27d7cc31f386780725b0c47a9c92e9c064fc128a
Signed-off-by: Yonattan Louise <yonattan.a.louise.mendoza@intel.com>
This patch remove the dependency of the ADVANCE_POWER_MANAGEMENT
for profiling sleep events that was supported only for microkernel.
Allowing us to also use this feature in nanokernel-only systems.
Change-Id: I1761eb6c4d72f477b419dfca5dc152b0fb69ee27
Signed-off-by: Yonattan Louise <yonattan.a.louise.mendoza@intel.com>
Replaces calls to nano_cycle_get_32() and task_cycle_get_32()
with sys_cycle_get_32() as that is the preferred API to use.
Change-Id: I0ad1c50083c4cfdd9a26c2f20ba24e065410d90d
Signed-off-by: Peter Mitsis <peter.mitsis@windriver.com>
Put initialization priorities as device driver Kconfig
parameter.
Initialization priority value for each platform is defined
in the platform Kconfig file.
Drivers and platform code use SYS_DEFINE_DEVICE to add
and initialization function.
Change-Id: I2f4f3c7370dac02408a1b50a0a1bade8b427a282
Signed-off-by: Dmitriy Korovkin <dmitriy.korovkin@windriver.com>
Signed-off-by: Anas Nashif <anas.nashif@intel.com>
In order to have a name according to the functionality of the feature.
This commit rename any text, function and variable related with the
Profiler name to Event logger.
Change-Id: I4f612cbc7c37965c35a64f06cc3ce5e3249d90e5
Signed-off-by: Yonattan Louise <yonattan.a.louise.mendoza@intel.com>
