From 4535decca5c2bcd267e6f0b5438e23265270bcf2 Mon Sep 17 00:00:00 2001 From: Victor Stinner Date: Sat, 21 Apr 2012 21:25:00 +0200 Subject: [PATCH] PEP 418: Stephen J. Turnbull's patch 3: complete the Glossary --- pep-0418.txt | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) diff --git a/pep-0418.txt b/pep-0418.txt index 3f66718c3..c21eb5bc7 100644 --- a/pep-0418.txt +++ b/pep-0418.txt @@ -595,6 +595,10 @@ Glossary The amount of deviation of measurements by a given instrument from true values. See also `Accuracy and precision `_. + Inaccuracy in clocks may be caused by lack of precision, drift, or an + incorrect initial setting of the clock (e.g., timing of threads is + inherently inaccurate because perfect synchronization in resetting + counters is quite difficult). :Adjusted: Resetting a clock to the correct time. This may be done either @@ -636,7 +640,9 @@ Glossary :Drift: The accumulated error against "true" time, as defined externally to - the system. + the system. Drift may be due to imprecision, or to a difference + between the average rate at which clock time advances and that of + real time. :Epoch: The reference point of a clock. For clocks providing , @@ -662,7 +668,9 @@ Glossary :Precision: The amount of deviation among measurements of the same physical - value by a single instrument. + value by a single instrument. Imprecision in clocks may be caused by + a fluctuation of the rate at which clock time advances relative to + real time, including clock adjustment by slewing. :Process Time: Time elapsed since the process began. It is typically measured in