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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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7fe2f6399a
CPU power consumption vs performance tuning is no longer limited to CPU frequency switching anymore: deep sleep states, traditional dynamic frequency scaling and hidden turbo/boost frequencies are tied close together and depend on each other. The first two exist on different architectures like PPC, Itanium and ARM, the latter (so far) only on X86. On X86 the APU (CPU+GPU) will only run most efficiently if CPU and GPU has proper power management in place. Users and Developers want to have *one* tool to get an overview what their system supports and to monitor and debug CPU power management in detail. The tool should compile and work on as many architectures as possible. Once this tool stabilizes a bit, it is intended to replace the Intel-specific tools in tools/power/x86 Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
28 lines
1.1 KiB
C
28 lines
1.1 KiB
C
/* cpufreq-bench CPUFreq microbenchmark
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*
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* Copyright (C) 2008 Christian Kornacker <ckornacker@suse.de>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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/* load loop, this schould take about 1 to 2ms to complete */
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#define ROUNDS(x) {unsigned int rcnt; \
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for (rcnt = 0; rcnt< x*1000; rcnt++) { \
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(void)(((int)(pow(rcnt, rcnt) * sqrt(rcnt*7230970)) ^ 7230716) ^ (int)atan2(rcnt, rcnt)); \
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}} \
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void start_benchmark(struct config *config);
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