[issue19999] test_monotonic fails on x86 OpenIndiana
STINNER Victor
report at bugs.python.org
Tue Dec 24 15:08:08 CET 2013
STINNER Victor added the comment:
> but 0.0156001 isn't close enough to 0.015625 for "rounding errors" to be at all a plausible explanation for why it's so strange.
0.0156001 is close to 0.0156, and this number cannot be representated exactly in binary:
>>> (0.0156).hex()
'0x1.ff2e48e8a71dep-7'
C code used by Python:
GetSystemTimeAdjustment(&timeAdjustment, &timeIncrement,
&isTimeAdjustmentDisabled);
info->resolution = timeIncrement * 1e-7;
(And yes, 0.0156001 is surprising, I also expected 1/64, 0.015625)
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