Actions
Feature #4471
closed
DTrace count() with histogram
Status:
Resolved
Priority:
Normal
Assignee:
-
Category:
DTrace
Start date:
2014-01-14
Due date:
% Done:
90%
Estimated time:
Difficulty:
Medium
Tags:
Gerrit CR:
External Bug:
Description
From the report at Joyent:
I'd like to print a count() aggregation with a histogram representation of the value. Histograms are commonly used to visualize other DTrace aggregations.
Here is an example use case:
# dtrace -n 'profile-99 /curthread->t_pri != -1/ { @[execname] = count(); }'
dtrace: description 'profile-99 ' matched 1 probe
^C
beam.smp 1
cat 1
dtrace 1
intrd 1
rsyslogd 1
sed 1
zpool-zones 1
mysqld 2
locale 6
sshd 7
fsflush 11
node 17
unicorn 24
bash 139
qemu-system-x86_ 223
Here's how it could be presented:
# dtrace -n 'profile-99 /curthread->t_pri != -1/ { @[execname] = hcount(); }'
dtrace: description 'profile-99 ' matched 1 probe
^C
Key ------------- Distribution ------------- Count
beam.smp | 1
cat | 1
dtrace | 1
intrd | 1
rsyslogd | 1
sed | 1
zpool-zones | 1
mysqld | 2
locale |@ 6
sshd |@ 7
fsflush |@@ 11
node |@@ 17
unicorn |@@@ 24
bash |@@@@@@@@@@@@@@@@@@@ 139
qemu-system-x86_ |@@@@@@@@@@@@@@@@@@@@@@@@@@@ 223
This could be a new printa() character, a different aggregation type (@hcount), or something else.
--
We are calling this "agghist"
Updated by Rich Lowe over 9 years ago
- Status changed from In Progress to Resolved
Updated by Electric Monk over 9 years ago
git commit 33093f5bcdc51014933497dd39374080c1ac5705
Author: Bryan Cantrill <bryan@joyent.com> 4471 DTrace count() with histogram 4472 DTrace full width distribution histograms 4473 DTrace frequency trails Reviewed by: Dan McDonald <danmcd@omniti.com> Approved by: Gordon Ross <gwr@nexenta.com>
Actions