commit 24d72350f321c17b0bfe1ef3fd52d4070a1c02c3
author Mathias Agopian <mathias@google.com> Fri Nov 05 19:12:58 2010 -0700
committer Mathias Agopian <mathias@google.com> Wed Jun 27 17:07:54 2012 -0700
tree a67b823f55392cf18573af61b4f5536c1d6d5946
parent 1e0b1e8491e5f6dc59faabe70cbfa942853150e0

improve sensorservice dumpsys and increase the max sensor rate to 1 ms (1000Hz)

the increased maximum rate is needed for proper gyro integration, current gyro
parts can sample at up to 800Hz

Change-Id: Ide75f6d5bc7a0fdafeb2dafd72db39e7afb9e794

services/sensorservice/SensorService.cpp

diff --git a/services/sensorservice/SensorService.cpp b/services/sensorservice/SensorService.cpp
index e204e04..c9ab992 100644
--- a/services/sensorservice/SensorService.cpp
+++ b/services/sensorservice/SensorService.cpp
@@ -175,10 +175,11 @@
         for (size_t i=0 ; i<mSensorList.size() ; i++) {
             const Sensor& s(mSensorList[i]);
             const sensors_event_t& e(mLastEventSeen.valueFor(s.getHandle()));
-            snprintf(buffer, SIZE, "%s (vendor=%s, handle=%d, last=<%5.1f,%5.1f,%5.1f>)\n",
+            snprintf(buffer, SIZE, "%s (vendor=%s, handle=%d, maxRate=%.2fHz, last=<%5.1f,%5.1f,%5.1f>)\n",
                     s.getName().string(),
                     s.getVendor().string(),
                     s.getHandle(),
+                    s.getMinDelay() ? (1000000.0f / s.getMinDelay()) : 0.0f,
                     e.data[0], e.data[1], e.data[2]);
             result.append(buffer);
         }

services/sensorservice/SensorService.h

diff --git a/services/sensorservice/SensorService.h b/services/sensorservice/SensorService.h
index 9f37799..dfb1c0e 100644
--- a/services/sensorservice/SensorService.h
+++ b/services/sensorservice/SensorService.h
@@ -49,8 +49,8 @@
 {
    friend class BinderService<SensorService>;
 
-   static const nsecs_t MINIMUM_EVENTS_PERIOD = 10000000; // 10ms
-   static const nsecs_t DEFAULT_EVENTS_PERIOD = 200000000; // 200 ms
+   static const nsecs_t MINIMUM_EVENTS_PERIOD =   1000000; // 1000 Hz
+   static const nsecs_t DEFAULT_EVENTS_PERIOD = 200000000; //    5 Hz
 
             SensorService();
     virtual ~SensorService();

services/sensorservice/tests/sensorservicetest.cpp

diff --git a/services/sensorservice/tests/sensorservicetest.cpp b/services/sensorservice/tests/sensorservicetest.cpp
index 42bf983..aea1062 100644
--- a/services/sensorservice/tests/sensorservicetest.cpp
+++ b/services/sensorservice/tests/sensorservicetest.cpp
@@ -27,15 +27,25 @@
     sp<SensorEventQueue> q((SensorEventQueue*)data);
     ssize_t n;
     ASensorEvent buffer[8];
+
+    static nsecs_t oldTimeStamp = 0;
+
     while ((n = q->read(buffer, 8)) > 0) {
         for (int i=0 ; i<n ; i++) {
-            if (buffer[i].type == Sensor::TYPE_ACCELEROMETER) {
+            if (buffer[i].type == Sensor::TYPE_GYROSCOPE) {
                 printf("time=%lld, value=<%5.1f,%5.1f,%5.1f>\n",
                         buffer[i].timestamp,
                         buffer[i].acceleration.x,
                         buffer[i].acceleration.y,
                         buffer[i].acceleration.z);
             }
+
+            if (oldTimeStamp) {
+                float t = float(buffer[i].timestamp - oldTimeStamp) / s2ns(1);
+                printf("%f ms (%f Hz)\n", t*1000, 1.0/t);
+            }
+            oldTimeStamp = buffer[i].timestamp;
+
         }
     }
     if (n<0 && n != -EAGAIN) {
@@ -56,7 +66,7 @@
     sp<SensorEventQueue> q = mgr.createEventQueue();
     printf("queue=%p\n", q.get());
 
-    Sensor const* accelerometer = mgr.getDefaultSensor(Sensor::TYPE_ACCELEROMETER);
+    Sensor const* accelerometer = mgr.getDefaultSensor(Sensor::TYPE_GYROSCOPE);
     printf("accelerometer=%p (%s)\n",
             accelerometer, accelerometer->getName().string());
     q->enableSensor(accelerometer);