When we try to run ftrace with cyclictest command of rt-test,
We view the error according to different kernel version.
We need to modify this hard coded interface.
* Directory name of each kernel version
2.6.24.7-rt23 /sys/kernel/debug/tracing/latency_hist/wakeup_latency/reset
2.6.31-rc9-rt9.1 /sys/kernel/debug/tracing/latency_hist/wakeup/reset
2.6.33.7.2-rt30 /sys/kernel/debug/tracing/latency_hist/wakeup/reset
* parsing verification: ./linux-2.6/scripts/checkpatch.pl --> OK
Signed-off-by: Geunsik Lim <geunsik.lim@xxxxxxxxxxx>
Reviewed-by: John Kacur <jkacur@xxxxxxxxxx>
Reviewed-by: Carsten Emde <C.Emde@xxxxxxxxx>
---
src/cyclictest/cyclictest.c | 3 ++-
1 files changed, 2 insertions(+), 1 deletions(-)
diff --git a/src/cyclictest/cyclictest.c b/src/cyclictest/cyclictest.c
index 0847aed..abc0b4e 100644
--- a/src/cyclictest/cyclictest.c
+++ b/src/cyclictest/cyclictest.c
@@ -487,7 +487,7 @@ static void setup_tracer(void)
setkernvar(traceroptions, traceptr[i]);
}
setkernvar("tracing_max_latency", "0");
- setkernvar("latency_hist/wakeup_latency/reset", "1");
+ setkernvar("latency_hist/wakeup/reset", "1");
} else {
setkernvar("trace_all_cpus", "1");
setkernvar("trace_freerunning", "1");
@@ -501,6 +501,7 @@ static void setup_tracer(void)
if (ftrace)
setkernvar("mcount_enabled", "1");
setkernvar("trace_enabled", "1");
+ setkernvar("latency_hist/wakeup_latency/reset", "1");
}
tracing(1);
--
1.7.3
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