From a40cccda464fe11361936121b51cdaa635508c29 Mon Sep 17 00:00:00 2001 From: Mathieu Desnoyers Date: Sat, 28 Jan 2012 12:51:18 -0500 Subject: [PATCH 1/1] Add offset_s to deal with offset overflow Signed-off-by: Mathieu Desnoyers --- common-trace-format-specification.txt | 18 ++++++++++++------ 1 file changed, 12 insertions(+), 6 deletions(-) diff --git a/common-trace-format-specification.txt b/common-trace-format-specification.txt index a8603ba..545fbc7 100644 --- a/common-trace-format-specification.txt +++ b/common-trace-format-specification.txt @@ -1263,8 +1263,12 @@ clock { freq = 1000000000; /* frequency, in Hz */ /* precision in seconds is: 1000 * (1/freq) */ precision = 1000; - /* clock value offset from Epoch is: offset * (1/freq) */ - offset = 1326476837897235420; + /* + * clock value offset from Epoch is: + * offset_s + (offset * (1/freq)) + */ + offset_s = 1326476837; + offset = 897235420; }; The mandatory "name" field specifies the name of the clock identifier, @@ -1275,10 +1279,12 @@ can be added with the "description" field. The "freq" field is the initial frequency of the clock, in Hz. If the "freq" field is not present, the frequency is assumed to be 1000000000 (providing clock increment of 1 ns). The optional "precision" field details the -uncertainty on the clock measurements, in (1/freq) units. The "offset" -field indicates the offset from POSIX.1 Epoch, 1970-01-01 00:00:00 +0000 -(UTC), to the zero of value of the clock, in (1/freq) units. If the -"offset" field is not present, it is assigned the 0 value. +uncertainty on the clock measurements, in (1/freq) units. The "offset_s" +and "offset" fields indicate the offset from POSIX.1 Epoch, 1970-01-01 +00:00:00 +0000 (UTC), to the zero of value of the clock. The "offset_s" +field is in seconds. The "offset" field is in (1/freq) units. If any of +the "offset_s" or "offset" field is not present, it is assigned the 0 +value. Secondly, a reference to this clock should be added within an integer type: -- 2.34.1