blob: 8b4783cadee34ada94a125c2a1dd55a00b371f6a (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
|
#!/usr/bin/env bash
#############################################################################
#
# This scripts queries and modifies CPU scaling frequencies to produce more
# accurate benchmark results. To move from a low power state to a higher
# one, run 'governor.sh performance'. To move back to a low power state
# run 'governor.sh powersave' or 'governor.sh ondemand' or reboot.
#
# Written and placed in public domain by Jeffrey Walton. The script based on
# code by Andy Polyakov, http://www.openssl.org/~appro/cryptogams/.
#
# Crypto++ Library is copyrighted as a compilation and (as of version 5.6.2)
# licensed under the Boost Software License 1.0, while the individual files
# in the compilation are all public domain.
#
# See https://www.cryptopp.com/wiki/Benchmarks for more details
#
#############################################################################
# Fixup ancient Bash
# https://unix.stackexchange.com/q/468579/56041
if [[ -z "${BASH_SOURCE[0]}" ]]; then
BASH_SOURCE="$0"
fi
if [[ "$EUID" -ne 0 ]]; then
echo "This script must be run as root"
[[ "$0" = "${BASH_SOURCE[0]}" ]] && exit 1 || return 1
fi
if [ "x$1" = "x" ]; then
echo "usage: $0 on[demand]|pe[rformance]|po[wersave]|us[erspace]?"
[[ "$0" = "${BASH_SOURCE[0]}" ]] && exit 1 || return 1
fi
# "on demand" may result in a "invalid write argument" or similar
case $1 in
on*|de*) governor="ondemand";;
po*|pw*) governor="powersave";;
pe*) governor="performance";;
co*) governor="conservative";;
us*) governor="userspace";;
\?) ;;
*) echo "$1: unrecognized governor";;
esac
if [ -z "$governor" ]; then
[[ "$0" = "${BASH_SOURCE[0]}" ]] && exit 1 || return 1
fi
cpus=$(ls /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor 2>/dev/null)
if [ -z "$cpus" ]; then
echo "Failed to read CPU system device tree"
[[ "$0" = "${BASH_SOURCE[0]}" ]] && exit 1 || return 1
fi
echo "Current CPU governor scaling settings:"
count=0
for cpu in $cpus; do
echo " CPU $count: $(cat "$cpu")"
((count++))
done
if [ "x$governor" != "x" ]; then
for cpu in $cpus; do
echo "$governor" > "$cpu"
done
fi
echo "New CPU governor scaling settings:"
count=0
for cpu in $cpus; do
echo " CPU $count: $(cat "$cpu")"
((count++))
done
[[ "$0" = "${BASH_SOURCE[0]}" ]] && exit 0 || return 0
|
