Merge branch 'feature/interrupt_overhead_time_test' into 'master'

donghengqaz · donghengqaz · commit 1b42f75df87a · 2019-05-21T09:59:23.000+08:00
Add interrupt overhead time test

See merge request sdk/ESP8266_RTOS_SDK!946
diff --git a/components/esp8266/test/test_interrupt_overhead.c b/components/esp8266/test/test_interrupt_overhead.c
@@ -0,0 +1,89 @@
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include <assert.h>
+#include <esp_spi_flash.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <string.h>
+#include <sys/param.h>
+#include <unity.h>
+
+#include "FreeRTOS.h"
+#include <driver/hw_timer.h>
+#include "esp8266/timer_register.h"
+
+#define TIMER1_ENABLE_TIMER 0x0080
+#define TIMER1_INTERRUPT_TYPE_LEVEL 1
+#define hw_timer_intr_register(a, b) \
+  _xt_isr_attach(ETS_FRC_TIMER1_INUM, (a), (b))
+
+struct timer_regs {
+  uint32_t frc1_load;  /* 0x60000600 */
+  uint32_t frc1_count; /* 0x60000604 */
+  uint32_t frc1_ctrl;  /* 0x60000608 */
+  uint32_t frc1_int;   /* 0x6000060C */
+};
+static struct timer_regs *timer = (struct timer_regs *)(PERIPHS_TIMER_BASEDDR);
+
+static void test_timer_cb(void *cpu_clk_cnt) {
+  *(uint32_t *)cpu_clk_cnt = soc_get_ccount();
+}
+
+TEST_CASE("Test interrupt overhead time", "[log]") {
+  volatile uint32_t cpu_clk_cnt_interrupt_enter;
+  uint32_t cpu_clk_cnt_start;
+  uint32_t cpu_clk_cnt_stop;
+
+  // Execute the test twice and only take the second result to make sure
+  // that IRAM has cached all instructions.
+  for (int i = 0; i < 2; i++) {
+    cpu_clk_cnt_interrupt_enter = 0;
+    hw_timer_init(test_timer_cb, (void *)&cpu_clk_cnt_interrupt_enter);
+    hw_timer_intr_register(test_timer_cb, (void *)&cpu_clk_cnt_interrupt_enter);
+
+    // Setup the timer, so that it'll trigger exactly once.
+    timer->frc1_int = 0;   // reset the interrupt status
+    timer->frc1_load = 0;  // trigger the timer interrupt immediately
+    timer->frc1_ctrl = TIMER1_ENABLE_TIMER | TIMER1_INTERRUPT_TYPE_LEVEL;
+    cpu_clk_cnt_start = soc_get_ccount();
+
+    // busy wait until the interrupt triggered and updated the variable
+    while (!cpu_clk_cnt_interrupt_enter)
+      ;
+
+    cpu_clk_cnt_stop = soc_get_ccount();
+    hw_timer_deinit();
+  }
+
+  uint32_t overhead_enter = cpu_clk_cnt_interrupt_enter - cpu_clk_cnt_start;
+  uint32_t overhead_total = cpu_clk_cnt_stop - cpu_clk_cnt_start;
+
+#if CONFIG_OPTIMIZATION_LEVEL_DEBUG
+#  define INTERRUPT_OVERHEAD_ENTER_TIME 334
+#  define INTERRUPT_OVERHEAD_TOTAL_TIME 459
+#else // CONFIG_OPTIMIZATION_LEVEL_RELEASE
+#  define INTERRUPT_OVERHEAD_ENTER_TIME 258
+#  define INTERRUPT_OVERHEAD_TOTAL_TIME 385
+#endif
+
+  if (overhead_enter != INTERRUPT_OVERHEAD_ENTER_TIME ||
+      overhead_total != INTERRUPT_OVERHEAD_TOTAL_TIME) {
+    char buf[128];
+    snprintf(buf, sizeof(buf),
+             "interrupt overhead times changed. expected (enter=%d, total=%d), "
+             "but got (enter=%d, total=%d)",
+             INTERRUPT_OVERHEAD_ENTER_TIME, INTERRUPT_OVERHEAD_TOTAL_TIME,
+             overhead_enter, overhead_total);
+    TEST_FAIL_MESSAGE(buf);
+  }
+}
