From aa2b125a67c4b4d64b8c4b5bed662cdac1e5f1c6 Mon Sep 17 00:00:00 2001
From: Lorenz Meier <lm@inf.ethz.ch>
Date: Wed, 21 May 2014 14:19:39 +0200
Subject: perf: Allow printing to arbritrary fds

---
 src/modules/systemlib/perf_counter.c | 16 +++++++++++-----
 src/modules/systemlib/perf_counter.h | 14 ++++++++++++--
 src/systemcmds/perf/perf.c           |  2 +-
 src/systemcmds/tests/tests_main.c    |  2 +-
 4 files changed, 25 insertions(+), 9 deletions(-)

(limited to 'src')

diff --git a/src/modules/systemlib/perf_counter.c b/src/modules/systemlib/perf_counter.c
index b4ca0ed3e..22182e39e 100644
--- a/src/modules/systemlib/perf_counter.c
+++ b/src/modules/systemlib/perf_counter.c
@@ -281,13 +281,19 @@ perf_reset(perf_counter_t handle)
 
 void
 perf_print_counter(perf_counter_t handle)
+{
+	perf_print_counter_fd(0, handle);
+}
+
+void
+perf_print_counter_fd(int fd, perf_counter_t handle)
 {
 	if (handle == NULL)
 		return;
 
 	switch (handle->type) {
 	case PC_COUNT:
-		printf("%s: %llu events\n",
+		dprintf(fd, "%s: %llu events\n",
 		       handle->name,
 		       ((struct perf_ctr_count *)handle)->event_count);
 		break;
@@ -295,7 +301,7 @@ perf_print_counter(perf_counter_t handle)
 	case PC_ELAPSED: {
 		struct perf_ctr_elapsed *pce = (struct perf_ctr_elapsed *)handle;
 
-		printf("%s: %llu events, %lluus elapsed, %llu avg, min %lluus max %lluus\n",
+		dprintf(fd, "%s: %llu events, %lluus elapsed, %llu avg, min %lluus max %lluus\n",
 		       handle->name,
 		       pce->event_count,
 		       pce->time_total,
@@ -308,7 +314,7 @@ perf_print_counter(perf_counter_t handle)
 	case PC_INTERVAL: {
 		struct perf_ctr_interval *pci = (struct perf_ctr_interval *)handle;
 
-		printf("%s: %llu events, %llu avg, min %lluus max %lluus\n",
+		dprintf(fd, "%s: %llu events, %llu avg, min %lluus max %lluus\n",
 		       handle->name,
 		       pci->event_count,
 		       (pci->time_last - pci->time_first) / pci->event_count,
@@ -349,12 +355,12 @@ perf_event_count(perf_counter_t handle)
 }
 
 void
-perf_print_all(void)
+perf_print_all(int fd)
 {
 	perf_counter_t handle = (perf_counter_t)sq_peek(&perf_counters);
 
 	while (handle != NULL) {
-		perf_print_counter(handle);
+		perf_print_counter_fd(fd, handle);
 		handle = (perf_counter_t)sq_next(&handle->link);
 	}
 }
diff --git a/src/modules/systemlib/perf_counter.h b/src/modules/systemlib/perf_counter.h
index d8f69fdbf..6835ee4a2 100644
--- a/src/modules/systemlib/perf_counter.h
+++ b/src/modules/systemlib/perf_counter.h
@@ -121,16 +121,26 @@ __EXPORT extern void		perf_cancel(perf_counter_t handle);
 __EXPORT extern void		perf_reset(perf_counter_t handle);
 
 /**
- * Print one performance counter.
+ * Print one performance counter to stdout
  *
  * @param handle		The counter to print.
  */
 __EXPORT extern void		perf_print_counter(perf_counter_t handle);
 
+/**
+ * Print one performance counter to a fd.
+ *
+ * @param fd			File descriptor to print to - e.g. 0 for stdout
+ * @param handle		The counter to print.
+ */
+__EXPORT extern void		perf_print_counter_fd(int fd, perf_counter_t handle);
+
 /**
  * Print all of the performance counters.
+ *
+ * @param fd			File descriptor to print to - e.g. 0 for stdout
  */
-__EXPORT extern void		perf_print_all(void);
+__EXPORT extern void		perf_print_all(int fd);
 
 /**
  * Reset all of the performance counters.
diff --git a/src/systemcmds/perf/perf.c b/src/systemcmds/perf/perf.c
index b69ea597b..b08a2e3b7 100644
--- a/src/systemcmds/perf/perf.c
+++ b/src/systemcmds/perf/perf.c
@@ -73,7 +73,7 @@ int perf_main(int argc, char *argv[])
 		return -1;
 	}
 
-	perf_print_all();
+	perf_print_all(0 /* stdout */);
 	fflush(stdout);
 	return 0;
 }
diff --git a/src/systemcmds/tests/tests_main.c b/src/systemcmds/tests/tests_main.c
index fe22f6177..e3f26924f 100644
--- a/src/systemcmds/tests/tests_main.c
+++ b/src/systemcmds/tests/tests_main.c
@@ -235,7 +235,7 @@ test_perf(int argc, char *argv[])
 	printf("perf: expect count of 1\n");
 	perf_print_counter(ec);
 	printf("perf: expect at least two counters\n");
-	perf_print_all();
+	perf_print_all(0);
 
 	perf_free(cc);
 	perf_free(ec);
-- 
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