[lttng-dev] [RFC PATCH CTF 2/3] Clarify monotonicity requirement on timestamp begin

[Philippe Proulx]

----- Original Message -----
> From: "Mathieu Desnoyers" <mathieu.desnoyers at efficios.com>
> To: "gbastien+lttng" <gbastien+lttng at versatic.net>, "Matthew Khouzam" <matthew.khouzam at ericsson.com>,
> diamon-discuss at linuxfoundation.org, pproulx at efficios.com, "Jeremie Galarneau" <jgalar at efficios.com>
> Cc: "lttng-dev" <lttng-dev at lists.lttng.org>, "Mathieu Desnoyers" <mathieu.desnoyers at efficios.com>
> Sent: Thursday, 23 April, 2020 16:52:25
> Subject: [RFC PATCH CTF 2/3] Clarify monotonicity requirement on timestamp begin

> Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers at efficios.com>
> ---
> common-trace-format-specification.md | 10 ++++++----
> 1 file changed, 6 insertions(+), 4 deletions(-)
> 
> diff --git a/common-trace-format-specification.md
> b/common-trace-format-specification.md
> index f5fea51..53b70f4 100644
> --- a/common-trace-format-specification.md
> +++ b/common-trace-format-specification.md
> @@ -836,10 +836,12 @@ TSDL metadata):
>     range between these timestamps should include all event timestamps
>     assigned to events contained within the packet. The timestamp at the
>     beginning of an event packet is guaranteed to be below or equal the
> -    timestamp at the end of that event packet. The timestamp at the end
> -    of an event packet is guaranteed to be below or equal the
> -    timestamps at the end of any following packet within the same stream.
> -    See [Clocks](#spec8) for more detail.
> +    timestamp at the end of that event packet. The timestamp at the
> +    beginning of an event packet is guaranteed to be above or equal the

"greater than or equal to"

> +    timestamps at the beginning of any prior packet within the same
> +    stream. The timestamp at the end of an event packet is guaranteed to
> +    be below or equal the timestamps at the end of any following packet

"less than or equal to"

Phil

> +    within the same stream. See [Clocks](#spec8) for more detail.
>   * **Events discarded count**. Snapshot of a per-stream
>     free-running counter, counting the number of events discarded that
>     were supposed to be written in the stream after the last event in
> --
> 2.11.0