freq_error1 150 tools/testing/selftests/timers/freq-step.c double freq_error1, freq_error2; freq_error1 181 tools/testing/selftests/timers/freq-step.c freq_error1 = slope * (1.0 - mono_freq_offset) - mono_freq_offset - freq_error1 191 tools/testing/selftests/timers/freq-step.c 1e6 * freq_error1, 1e9 * stddev1, 1e9 * max1,