mirror of https://gitee.com/openkylin/linux.git
22 lines
335 B
C
22 lines
335 B
C
/*
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* X86 trace clocks
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*/
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#include <asm/trace_clock.h>
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#include <asm/barrier.h>
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#include <asm/msr.h>
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/*
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* trace_clock_x86_tsc(): A clock that is just the cycle counter.
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*
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* Unlike the other clocks, this is not in nanoseconds.
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*/
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u64 notrace trace_clock_x86_tsc(void)
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{
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u64 ret;
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rdtsc_barrier();
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rdtscll(ret);
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return ret;
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}
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