From a83f067af9af82f034596f6f6154f4dccf598ace Mon Sep 17 00:00:00 2001
From: JF <jf@codingfield.com>
Date: Thu, 2 Jul 2020 21:38:52 +0200
Subject: Reduce RAM memory usage by tuning the stack of the stasks and the
 heap allocated for FreeRTOS.

Add Monitor to log the stack usage of each task.
---
 src/SystemTask/SystemMonitor.h | 46 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 46 insertions(+)
 create mode 100644 src/SystemTask/SystemMonitor.h

(limited to 'src/SystemTask/SystemMonitor.h')

diff --git a/src/SystemTask/SystemMonitor.h b/src/SystemTask/SystemMonitor.h
new file mode 100644
index 00000000..50dd295a
--- /dev/null
+++ b/src/SystemTask/SystemMonitor.h
@@ -0,0 +1,46 @@
+#pragma once
+#include <FreeRTOS.h>
+#include <task.h>
+#include <nrf_log.h>
+
+
+namespace Pinetime {
+  namespace System {
+    struct DummyMonitor {};
+    struct FreeRtosMonitor {};
+
+    template<class T>
+    class SystemMonitor {
+      public:
+        SystemMonitor() = delete;
+    };
+
+    template<>
+    class SystemMonitor<DummyMonitor> {
+      public:
+        void Process() const {}
+    };
+
+    template<>
+    class SystemMonitor<FreeRtosMonitor> {
+      public:
+        void Process() const {
+          if(xTaskGetTickCount() - lastTick > 10000) {
+            NRF_LOG_INFO("---------------------------------------\nFee heap : %d", xPortGetFreeHeapSize());
+            auto nb = uxTaskGetSystemState(tasksStatus, 10, NULL);
+            for (int i = 0; i < nb; i++) {
+              NRF_LOG_INFO("Task [%s] - %d", tasksStatus[i].pcTaskName, tasksStatus[i].usStackHighWaterMark);
+              if (tasksStatus[i].usStackHighWaterMark < 20)
+                NRF_LOG_INFO("WARNING!!! Task %s task is nearly full, only %dB available", tasksStatus[i].pcTaskName,
+                             tasksStatus[i].usStackHighWaterMark * 4);
+            }
+            lastTick = xTaskGetTickCount();
+          }
+        }
+
+      private:
+        mutable TickType_t lastTick = 0;
+        mutable TaskStatus_t tasksStatus[10];
+    };
+  }
+}
\ No newline at end of file
-- 
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