On Mon, Nov 11, 2024 at 09:49:53AM +0800, ende.tan@xxxxxxxxxxxxxxxx wrote:
> 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
>
>
Reviewed-by: Marcelo Tosatti <mtosatti@xxxxxxxxxx>
