tests: boot_time: remove all the code and instrumentation feeding into test

Remove the config BOOT_TIME_MEASUREMENT and corresponding #ifdef'd code
throughout (kernel/init.c, idle.c, core/common.S , reset.S, ... ) which
hold the extern hooks for z_timestamp_main and z_timestamp_idle in the
removed boot_time test suite.

Signed-off-by: Jennifer Williams <jennifer.m.williams@intel.com>

arch/arc/core/reset.S

@@ -54,17 +54,6 @@ SECTION_FUNC(TEXT,__start)
 #ifdef CONFIG_ARC_SECURE_FIRMWARE
 	sflag r0
 #endif
-
-#if defined(CONFIG_BOOT_TIME_MEASUREMENT) && defined(CONFIG_ARCV2_TIMER)
-	/*
-	 * ARCV2 timer (timer0) is a free run timer, let it start to count
-	 * here.
-	 */
-	mov_s r0, 0xffffffff
-	sr r0, [_ARC_V2_TMR0_LIMIT]
-	mov_s r0, 0
-	sr r0, [_ARC_V2_TMR0_COUNT]
-#endif
 	/* interrupt related init */
 #ifndef CONFIG_ARC_NORMAL_FIRMWARE
 	/* IRQ_ACT and IRQ_CTRL should be initialized and set in secure mode */

arch/x86/core/common.S

@@ -26,17 +26,6 @@
 1:
 #endif
 
-#ifdef CONFIG_BOOT_TIME_MEASUREMENT
-	/*
-	 * Boot time measurements use TSC as a datum; zero it.
-	 */
-
-	xorl %eax, %eax
-	xorl %edx, %edx
-	movl $X86_TIME_STAMP_COUNTER_MSR, %ecx
-	wrmsr
-#endif
-
 #ifdef CONFIG_PIC_DISABLE
 	/*
 	 * "Disable" legacy i8259 interrupt controllers. Note that we

drivers/timer/arcv2_timer0.c

@@ -300,9 +300,6 @@ int sys_clock_driver_init(const struct device *dev)
 		    timer_int_handler, NULL, 0);
 
 	timer0_limit_register_set(last_load - 1);
-#ifdef CONFIG_BOOT_TIME_MEASUREMENT
-	cycle_count = timer0_count_register_get();
-#endif
 #endif
 	timer0_count_register_set(0);
 	timer0_control_register_set(_ARC_V2_TMR_CTRL_NH | _ARC_V2_TMR_CTRL_IE);

kernel/idle.c

@@ -14,8 +14,6 @@
 #include <logging/log.h>
 #include <ksched.h>
 
-extern uint32_t z_timestamp_idle;
-
 LOG_MODULE_DECLARE(os, CONFIG_KERNEL_LOG_LEVEL);
 
 /**
@@ -68,10 +66,6 @@ void idle(void *unused1, void *unused2, void *unused3)
 	ARG_UNUSED(unused2);
 	ARG_UNUSED(unused3);
 
-#ifdef CONFIG_BOOT_TIME_MEASUREMENT
-	z_timestamp_idle = k_cycle_get_32();
-#endif
-
 	while (true) {
 		/* SMP systems without a working IPI can't
 		 * actual enter an idle state, because they

kernel/include/kernel_internal.h

@@ -127,11 +127,6 @@ extern void z_early_boot_rand_get(uint8_t *buf, size_t length);
 extern int z_stack_adjust_initialized;
 #endif
 
-#ifdef CONFIG_BOOT_TIME_MEASUREMENT
-extern uint32_t z_timestamp_main; /* timestamp when main task starts */
-extern uint32_t z_timestamp_idle; /* timestamp when CPU goes idle */
-#endif
-
 extern struct k_thread z_main_thread;
 
 

kernel/init.c

@@ -37,12 +37,6 @@
 #include <logging/log.h>
 LOG_MODULE_REGISTER(os, CONFIG_KERNEL_LOG_LEVEL);
 
-/* boot time measurement items */
-#ifdef CONFIG_BOOT_TIME_MEASUREMENT
-uint32_t __noinit z_timestamp_main;  /* timestamp when main task starts */
-uint32_t __noinit z_timestamp_idle;  /* timestamp when CPU goes idle */
-#endif
-
 /* the only struct z_kernel instance */
 struct z_kernel _kernel;
 
@@ -177,10 +171,6 @@ static void bg_thread_main(void *unused1, void *unused2, void *unused3)
 	z_sys_init_run_level(_SYS_INIT_LEVEL_SMP);
 #endif
 
-#ifdef CONFIG_BOOT_TIME_MEASUREMENT
-	z_timestamp_main = k_cycle_get_32();
-#endif
-
 	extern void main(void);
 
 	main();

subsys/debug/Kconfig

@@ -6,12 +6,6 @@
 
 menu "System Monitoring Options"
 
-config BOOT_TIME_MEASUREMENT
-	bool "Boot time measurements"
-	depends on ARCH_POSIX || ARM || X86
-	help
-	  This option enables the recording of timestamps during system boot.
-
 menuconfig THREAD_ANALYZER
 	bool "Enable Thread analyzer"
 	select INIT_STACKS