benchmark: context_switch testcase refactoring.

 - fix: be sure to print the context switch timer when low-priority
   process and high-priority process have completed their run
 - use only SIG_USER0 to synchronize the processes
 - reduce processes' stack size

git-svn-id: https://src.develer.com/svnoss/bertos/trunk@3709 38d2e660-2303-0410-9eaa-f027e97ec537

diff --git a/bertos/benchmark/context_switch.c b/bertos/benchmark/context_switch.c
index ce051626bc6b770fc399097de9fea74f661cad62..a09a61461853157777267fead2660ef49f58f8b7 100644 (file)
--- a/bertos/benchmark/context_switch.c
+++ b/bertos/benchmark/context_switch.c
@@ -51,24 +51,20 @@
 
 #include <kern/proc.h>
 
-#define PROC_STACK_SIZE           1024
+#define PROC_STACK_SIZE           KERN_MINSTACKSIZE
 
 static PROC_DEFINE_STACK(hp_stack, PROC_STACK_SIZE);
 static PROC_DEFINE_STACK(lp_stack, PROC_STACK_SIZE);
 
 static Process *hp_proc, *lp_proc, *main_proc;
-Serial out;
+static Serial out;
 
 #if CONFIG_USE_HP_TIMER
-
 static hptime_t start, end;
-
 #endif
 
 static void NORETURN hp_process(void)
 {
-       proc_setPri(hp_proc, 2);
-
        while (1)
        {
                sig_wait(SIG_USER0);
@@ -78,18 +74,15 @@ static void NORETURN hp_process(void)
                #if CONFIG_USE_LED
                        LED_ON();
                #endif
-               timer_delay(100);
-               sig_send(main_proc, SIG_USER1);
+               sig_send(main_proc, SIG_USER0);
        }
 }
 
 static void NORETURN lp_process(void)
 {
-       proc_setPri(lp_proc, 1);
-
        while (1)
        {
-               sig_wait(SIG_USER1);
+               sig_wait(SIG_USER0);
                #if CONFIG_USE_HP_TIMER
                        start = timer_hw_hpread();
                #endif
@@ -97,7 +90,6 @@ static void NORETURN lp_process(void)
                        LED_ON();
                        LED_OFF();
                #endif
-
                sig_send(hp_proc, SIG_USER0);
        }
 }
@@ -120,16 +112,21 @@ void NORETURN context_switch(void)
        lp_proc = proc_new(lp_process, NULL, PROC_STACK_SIZE, lp_stack);
        main_proc = proc_current();
 
+       proc_setPri(hp_proc, 2);
+       proc_setPri(lp_proc, 1);
+
        while (1)
        {
+               sig_send(lp_proc, SIG_USER0);
+               sig_wait(SIG_USER0);
+
                #if CONFIG_USE_HP_TIMER
-                       kfile_printf(&out.fd, "Switch: %lu.%lu usec\n\r",
-                                                       hptime_to_us((end - start)),
-                                                       hptime_to_us((end - start) * 1000) % 1000);
+                       kfile_printf(&out.fd,
+                               "Switch: %lu.%lu usec\n\r",
+                               hptime_to_us((end - start)),
+                               hptime_to_us((end - start) * 1000) % 1000);
                #endif
-
-               sig_send(lp_proc, SIG_USER1);
-               sig_wait(SIG_USER1);
+               timer_delay(100);
        }
 
 }