Add -i option to rtspin (report interrupts)

Add an option that, together with -v (verbose), makes rtspin print
interrupt information from its control page.

1 files changed, 18 insertions, 2 deletions

diff --git a/bin/rtspin.c b/bin/rtspin.c
index ea7f192..d8366e3 100644
--- a/bin/rtspin.c
+++ b/bin/rtspin.c
@@ -6,7 +6,7 @@
 #include <time.h>
 #include <string.h>
 #include <assert.h>
-
+#include <inttypes.h>
 
 #include "litmus.h"
 #include "common.h"
@@ -184,7 +184,7 @@ static int job(double exec_time, double program_end, int lock_od, double cs_leng
         }
 }
 
-#define OPTSTR "p:c:wlveo:f:s:q:r:X:L:Q:v"
+#define OPTSTR "p:c:wlveo:f:s:q:r:X:L:Q:vi"
 int main(int argc, char** argv)
 {
         int ret;
@@ -210,6 +210,9 @@ int main(int argc, char** argv)
 
         int verbose = 0;
         unsigned int job_no;
+        struct control_page* cp;
+        int report_interrupts = 0;
+        uint64_t last_irq_count = 0;
 
         /* locking */
         int lock_od = -1;
@@ -275,6 +278,9 @@ int main(int argc, char** argv)
                 case 'v':
                         verbose = 1;
                         break;
+                case 'i':
+                        report_interrupts = 1;
+                        break;
                 case ':':
                         usage("Argument missing.");
                         break;
@@ -361,6 +367,8 @@ int main(int argc, char** argv)
         if (ret != 0)
                 bail_out("could not become RT task");
 
+        cp = get_ctrl_page();
+
         if (protocol >= 0) {
                 /* open reference to semaphore */
                 lock_od = litmus_open_lock(protocol, resource_id, lock_namespace, &cluster);
@@ -392,6 +400,14 @@ int main(int argc, char** argv)
                                 get_job_no(&job_no);
                                 printf("rtspin/%d:%u @ %.4fms\n", gettid(),
                                         job_no, (wctime() - start) * 1000);
+                                if (report_interrupts && cp) {
+                                        uint64_t irq = cp->irq_count;
+
+                                        printf("\ttotal interrupts: %" PRIu64
+                                               "; delta: %" PRIu64 "\n",
+                                               irq, irq - last_irq_count);
+                                        last_irq_count = irq;
+                                }
                         }
                         /* convert to seconds and scale */
                 } while (job(wcet_ms * 0.001 * scale, start + duration,