From fbf879ce2acc44b81105df3da8f004e37cbb418e Mon Sep 17 00:00:00 2001
From: Luis Gerhorst <luis.gerhorst@fau.de>
Date: Mon, 18 Jun 2018 23:17:47 +0200
Subject: [PATCH] Wait with getnstimeofday() loop
---
arch/arm/measuremore/trigger.c | 9 ++++++++-
1 file changed, 8 insertions(+), 1 deletion(-)
diff --git a/arch/arm/measuremore/trigger.c b/arch/arm/measuremore/trigger.c
index ac2bea7afe795..da09d642b15d1 100644
--- a/arch/arm/measuremore/trigger.c
+++ b/arch/arm/measuremore/trigger.c
@@ -184,7 +184,14 @@ static int memo_trigger(void) {
for (unsigned long i = 0; i < reps; i++) {
memo_start_run();
memo_checkpoint("start");
- udelay(delay_us);
+ struct timespec start;
+ getnstimeofday(&start);
+ struct timespec delta;
+ do {
+ struct timespec now;
+ getnstimeofday(&now);
+ delta = timespec_sub(now, start);
+ } while (delta.tv_sec == 0 || delta.tv_nsec < delay_ns);
memo_checkpoint("stop");
memo_stop_run();
}
--
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