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>
34 lines
1 KiB
C
34 lines
1 KiB
C
#ifndef __CPUPOWER_BITMASK__
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#define __CPUPOWER_BITMASK__
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/* Taken over from libbitmask, a project initiated from sgi:
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* Url: http://oss.sgi.com/projects/cpusets/
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* Unfortunately it's not very widespread, therefore relevant parts are
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* pasted here.
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*/
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struct bitmask {
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unsigned int size;
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unsigned long *maskp;
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};
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struct bitmask *bitmask_alloc(unsigned int n);
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void bitmask_free(struct bitmask *bmp);
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struct bitmask *bitmask_setbit(struct bitmask *bmp, unsigned int i);
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struct bitmask *bitmask_setall(struct bitmask *bmp);
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struct bitmask *bitmask_clearall(struct bitmask *bmp);
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unsigned int bitmask_first(const struct bitmask *bmp);
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unsigned int bitmask_next(const struct bitmask *bmp, unsigned int i);
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unsigned int bitmask_last(const struct bitmask *bmp);
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int bitmask_isallclear(const struct bitmask *bmp);
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int bitmask_isbitset(const struct bitmask *bmp, unsigned int i);
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int bitmask_parselist(const char *buf, struct bitmask *bmp);
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int bitmask_displaylist(char *buf, int len, const struct bitmask *bmp);
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#endif /*__CPUPOWER_BITMASK__ */
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