psusensor: Add support for the 'PowerState' parameter
When CPU is powered off, some sensor reading values are expected
to go below low thresholds. To prevent unnecessary sensor readings
and redundant threshold event trigger in cases like that add support
for the 'PowerState' JSON configuration parameter similar to other
'dbus-sensors' apps.
Use 'checkThresholdsPowerDelay' function in a threshold check like
it is done in ADCSensor app. This is necessary as PSU data can drop
faster than a change in a power state is noticed.
Tested on the AMD EthanolX CRB with ISL68137:
When the PowerState is set to "On" and the platform is powered off,
no transactions are observed on the corresponding I2C bus.
When the PowerState is set to "Always" monitoring is always enabled
and I2C transactions are always observed regardless the platform
power state.
These commands were used to monitor transactions
on the I2C bus:
$ echo 1 > /sys/kernel/debug/tracing/tracing_on
$ echo 1 > /sys/kernel/debug/tracing/events/i2c/i2c_read/enable
$ cat /sys/kernel/debug/tracing/trace_pipe
Signed-off-by: Konstantin Aladyshev <aladyshev22@gmail.com>
Change-Id: Ic7b36e48828adf4eb2f7714965a4a1df4eb5ac3e
diff --git a/src/PSUSensor.cpp b/src/PSUSensor.cpp
index 81c7b9e..dec02ab 100644
--- a/src/PSUSensor.cpp
+++ b/src/PSUSensor.cpp
@@ -42,15 +42,17 @@
boost::asio::io_service& io, const std::string& sensorName,
std::vector<thresholds::Threshold>&& thresholdsIn,
const std::string& sensorConfiguration,
+ const PowerState& powerState,
const std::string& sensorUnits, unsigned int factor,
double max, double min, double offset,
const std::string& label, size_t tSize, double pollRate) :
Sensor(boost::replace_all_copy(sensorName, " ", "_"),
std::move(thresholdsIn), sensorConfiguration, objectType, false, max,
- min, conn),
+ min, conn, powerState),
std::enable_shared_from_this<PSUSensor>(), objServer(objectServer),
inputDev(io), waitTimer(io), path(path), pathRatedMax(""), pathRatedMin(""),
- sensorFactor(factor), minMaxReadCounter(0), sensorOffset(offset)
+ sensorFactor(factor), minMaxReadCounter(0), sensorOffset(offset),
+ thresholdTimer(io)
{
std::string unitPath = sensor_paths::getPathForUnits(sensorUnits);
if constexpr (debug)
@@ -136,6 +138,14 @@
void PSUSensor::setupRead(void)
{
+ if (!readingStateGood())
+ {
+ markAvailable(false);
+ updateValue(std::numeric_limits<double>::quiet_NaN());
+ restartRead();
+ return;
+ }
+
std::weak_ptr<PSUSensor> weakRef = weak_from_this();
inputDev.async_wait(boost::asio::posix::descriptor_base::wait_read,
[weakRef](const boost::system::error_code& ec) {
@@ -147,6 +157,24 @@
});
}
+void PSUSensor::restartRead(void)
+{
+ std::weak_ptr<PSUSensor> weakRef = weak_from_this();
+ waitTimer.expires_from_now(boost::posix_time::milliseconds(sensorPollMs));
+ waitTimer.async_wait([weakRef](const boost::system::error_code& ec) {
+ if (ec == boost::asio::error::operation_aborted)
+ {
+ std::cerr << "Failed to reschedule\n";
+ return;
+ }
+ std::shared_ptr<PSUSensor> self = weakRef.lock();
+ if (self)
+ {
+ self->setupRead();
+ }
+ });
+}
+
void PSUSensor::updateMinMaxValues(void)
{
if (auto newVal = readFile(pathRatedMin, sensorFactor))
@@ -204,24 +232,15 @@
}
lseek(fd, 0, SEEK_SET);
- waitTimer.expires_from_now(boost::posix_time::milliseconds(sensorPollMs));
-
- std::weak_ptr<PSUSensor> weakRef = weak_from_this();
- waitTimer.async_wait([weakRef](const boost::system::error_code& ec) {
- if (ec == boost::asio::error::operation_aborted)
- {
- std::cerr << "Failed to reschedule\n";
- return;
- }
- std::shared_ptr<PSUSensor> self = weakRef.lock();
- if (self)
- {
- self->setupRead();
- }
- });
+ restartRead();
}
void PSUSensor::checkThresholds(void)
{
- thresholds::checkThresholds(this);
+ if (!readingStateGood())
+ {
+ return;
+ }
+
+ thresholds::checkThresholdsPowerDelay(weak_from_this(), thresholdTimer);
}