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[Bug 1296750] incorrect interpolation across <mark> record in a merged a

To: pcp@xxxxxxxxxxx
Subject: [Bug 1296750] incorrect interpolation across <mark> record in a merged archive
From: bugzilla@xxxxxxxxxx
Date: Mon, 11 Jan 2016 20:06:30 +0000
Auto-submitted: auto-generated
Delivered-to: pcp@xxxxxxxxxxx
In-reply-to: <bug-1296750-355098@xxxxxxxxxxxxxxxxxxx>
References: <bug-1296750-355098@xxxxxxxxxxxxxxxxxxx>
https://bugzilla.redhat.com/show_bug.cgi?id=1296750



--- Comment #4 from Ken McDonell <kenj@xxxxxxxxxxx> ---
I'm suspect this is NOT a regression in interp.c (there is already a bunch of
QA tests for interpolation across <mark> records, so that's sort of what I'd
have expected).

But it is a problem associated with the use of the -O2sec time window on this
archive ...

In my archive the <mark> is at 07:13:21.705

pmrep gets the WRONG answers with -O2sec

$ pmrep -O2s -t 10s -pf%H:%M:%S -a third sample.byte_ctr
          s.byte_ctr
              byte/s
07:13:19         N/A
07:13:29     -48.900                <--- sample after <mark>
07:13:39     494.100
07:13:49     488.700

and pmrep gets the RIGHT answers without -O  

$ pmrep -t 10s -pf%H:%M:%S -a third sample.byte_ctr
          s.byte_ctr
              byte/s
07:13:17         N/A
07:13:27         N/A                 <--- sample after <mark>
07:13:37     457.400
07:13:47     550.500

I'll post as I discover more.

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