[PATCH 0/2 v2] rtla osnoise hist average calculation

From: Andreas Ziegler <br015@umbiko.net>
To: Daniel Bristot de Oliveira <bristot@kernel.org>,
	Steven Rostedt <rostedt@goodmis.org>
Cc: linux-trace-devel@vger.kernel.org, linux-kernel@vger.kernel.org,
	Andreas Ziegler <br015@umbiko.net>
Subject: [PATCH 0/2 v2] rtla osnoise hist average calculation
Date: Tue,  3 Jan 2023 11:33:58 +0100	[thread overview]
Message-ID: <20230103103400.275566-1-br015@umbiko.net> (raw)
In-Reply-To: <f47e877c-c95f-e3e6-b96f-89b0ca582878@kernel.org>

Version 2 of the proposed patch, with changes split in two separate commits, 
as suggested by Daniel Bristot de Oliveira

rtla osnoise hist always outputs '0' as average duration value. Example:

# rtla osnoise hist -P F:1 -c 0-1 -r 900000 -d 1M -b 1 -E 5000 -T 1
# RTLA osnoise histogram
# Time unit is microseconds (us)
# Duration:   0 00:01:00
  ...
count:     5629      1364
min:          1         1
avg:          0         0
max:       2955        56

This is due to sum_sample in osnoise_hist_update_multiple() being calculated 
as the sum (duration), not as sum (duration * count).

Truncating of the average value in final output suggests too optimistic 
results; display floating point value instead.

Andreas Ziegler (2):
  tools/tracing/rtla: osnoise_hist: use total duration for average
    calculation
  tools/tracing/rtla: osnoise_hist: display average with two-digit
    precision

 tools/tracing/rtla/src/osnoise_hist.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

-- 
2.34.1