From: Tan En De <ende.tan@xxxxxxxxxxxxxxxx>
If cpu MHz is not listed in /proc/cpuinfo (as in RISC-V Linux), get the
frequency from /sys/firmware/devicetree/base/cpus/timebase-frequency.
Signed-off-by: Tan En De <ende.tan@xxxxxxxxxxxxxxxx>
---
src/queuelat/determine_maximum_mpps.sh | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/src/queuelat/determine_maximum_mpps.sh b/src/queuelat/determine_maximum_mpps.sh
index 733b6b2..adfd809 100755
--- a/src/queuelat/determine_maximum_mpps.sh
+++ b/src/queuelat/determine_maximum_mpps.sh
@@ -42,7 +42,15 @@ usage()
get_cpuinfo_mhz()
{
- grep "cpu MHz" /proc/cpuinfo | cut -f 3 -d " " | sort -rn | head -n1
+ # Try to determine MHz from /proc/cpuinfo
+ FREQ_MHZ=$(grep "cpu MHz" /proc/cpuinfo | cut -f 3 -d " " | sort -rn | head -n1)
+
+ # Try to determine MHz from /sys/firmware/devicetree/base/cpus/timebase-frequency
+ if [ -z $FREQ_MHZ ]; then
+ FREQ_MHZ=$(($((16#$(hexdump -e '1/1 "%02X"' /sys/firmware/devicetree/base/cpus/timebase-frequency)))/1000000))
+ fi
+
+ echo "$FREQ_MHZ"
}
# Check that the scheduling policy hasn't already been set
--
2.34.1
