With the advent of function graph tracing on MIPS, Octeon needs a high
precision sched_clock() implementation. Without it, most timing
numbers are reported as 0.000.
This new sched_clock just uses the 64-bit cycle counter appropriately
scaled.
Signed-off-by: David Daney <ddaney@xxxxxxxxxxxxxxxxxx>
---
arch/mips/cavium-octeon/csrc-octeon.c | 7 +++++++
1 files changed, 7 insertions(+), 0 deletions(-)
diff --git a/arch/mips/cavium-octeon/csrc-octeon.c b/arch/mips/cavium-octeon/csrc-octeon.c
index 96110f2..96df821 100644
--- a/arch/mips/cavium-octeon/csrc-octeon.c
+++ b/arch/mips/cavium-octeon/csrc-octeon.c
@@ -50,6 +50,13 @@ static struct clocksource clocksource_mips = {
.flags = CLOCK_SOURCE_IS_CONTINUOUS,
};
+unsigned long long notrace sched_clock(void)
+{
+ return clocksource_cyc2ns(read_c0_cvmcount(),
+ clocksource_mips.mult,
+ clocksource_mips.shift);
+}
+
void __init plat_time_init(void)
{
clocksource_mips.rating = 300;
--
1.6.0.6
