On Tue, 29 Nov 2016 20:02:25 -0500
termtech <termtech@email-addr-hidden> wrote:
> Fascinating! ANY one or two of the cores are OK,
> yet ANY three or all four of them causes the noises.
Don't know what CPU you have, but sounds like SMT (hyperthreading isn't
working well for you?
On my i7-2600k I've never seen problems with it. You could try to
disable it in the BIOS, or try these scripts for turning SMT on and off:
$ cat bin/smt-off
#!/bin/bash
# Be careful to not skip the space at the beginning nor the end
CPUS_TO_SKIP=" $(cat /sys/devices/system/cpu/cpu*/topology/thread_siblings_list | sed 's/[^0-9].*//' | sort | uniq | tr "\r\n" " ") "
for CPU_PATH in /sys/devices/system/cpu/cpu[0-9]*; do
CPU="$(echo $CPU_PATH | tr -cd "0-9")"
echo "$CPUS_TO_SKIP" | grep " $CPU " > /dev/null
if [ $? -ne 0 ]; then
echo 0 > $CPU_PATH/online
fi
done
$ cat bin/smt-on
#!/bin/bash
# Be careful to not skip the space at the beginning nor the end
CPUS_TO_SKIP=" $(cat /sys/devices/system/cpu/cpu*/topology/thread_siblings_list | sed 's/[^0-9].*//' | sort | uniq | tr "\r\n" " ") "
for CPU_PATH in /sys/devices/system/cpu/cpu[0-9]*; do
CPU="$(echo $CPU_PATH | tr -cd "0-9")"
echo "$CPUS_TO_SKIP" | grep " $CPU " > /dev/null
if [ $? -ne 0 ]; then
echo 1 > $CPU_PATH/online
fi
done
-- Joakim _______________________________________________ Linux-audio-user mailing list Linux-audio-user@email-addr-hidden http://lists.linuxaudio.org/listinfo/linux-audio-userReceived on Thu Dec 1 00:15:01 2016
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