arch_freq_get_on_cpu

Name:arch_freq_get_on_cpu

Proto:unsigned int arch_freq_get_on_cpu(int cpu)

Type:unsigned int

Parameter:

Type	Parameter	Name
int	cpu

121

If Not TSC clocks / usec, not used here Then Return 0

124

If Not boot_cpu_has(P-State hardware coordination feedback capability (APERF/MPERF MSRs) ) Then Return 0

127

If Not housekeeping_cpu(cpu, HK_FLAG_MISC) Then Return 0

130

If aperfmperf_snapshot_cpu(cpu, ktime_get(), true) Then Return per_cpu(khz, cpu)

133

msleep(APERFMPERF_REFRESH_DELAY_MS)

134

smp_call_function_single(cpu, aperfmperf_snapshot_khz()* On the current CPU, snapshot APERF, MPERF, and jiffies* unless we already did it within 10ms* calculate kHz, save snapshot, NULL, 1)

136

Return per_cpu(khz, cpu)

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