Dear Till,
I'am very sorry to bother you again.
We are still working hard to looking for cause why Ubuntu 16.04 printing
performance slowdown.
We figure out that there are many cause may slowdown the print job.
The other cause than OS may slowdown the print job, and we are working on those
cause’s investigation.
Here are some slowdown point about OS issues that we can't investigation
deeper, we hope that you(or your team) can offer a help for the investigation.
The phenomenon that print jobs slower in 16.04 is more obvious when
printing many single page jobs in the same time.
We use a printing manual to simulate the continuous printing. The printing
result shows that Ubuntu 16.04 is slower than 14.04.
Below is the printing time:
------------------------------------
Ubuntu 14.04:
Round 1: 12.86(s)
Round 2: 12.56(s)
Aver: 12.73(s)
Ubuntu 16.04:
Round 1: 14.09(s)
Round 2: 13.98(s)
Aver: 14.29(s)
------------------------------------
Attach file introduction:
------------------------------------
Test log:
\PS_Driver_log\PS_Driver_log\Log\error_log20181204_14.04Origin_A4_7ods_job47_53
\PS_Driver_log\PS_Driver_log\Log\error_log20181204_16.04Origin_A4_7ods_job83_89
Test Driver:
\PS_Driver_log\PS_Driver\Ricoh-Basic-PS-PPDv1.12.1.tar.gz
Test file:
\PS_Driver_log\Testfile\testlinux.ods
Printing manual:
\PS_Driver_log.zip\TestManualOfContinuousPrinting.docx
------------------------------------
By the way, the printing performance is unstable, some times the
slowdown of Ubuntu 16.04 is obvious. But what we can confirm is that
Ubuntu 16.04 is slower all the time.
We appreciate that you can do we a favor on the investigation why
16.04's printing performance slowdown.
Best Regards,
** Attachment added: "PS_Driver_log.zip"
https://bugs.launchpad.net/ubuntu/+source/cups/+bug/1801496/+attachment/5219187/+files/PS_Driver_log.zip
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You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to cups in Ubuntu.
https://bugs.launchpad.net/bugs/1801496
Title:
Printing job in 16.04 is slower than in 14.04
Status in cups package in Ubuntu:
Incomplete
Bug description:
Ubuntu 16.04LTS
OS Version： 16.04.5
CUPS Version： 2.1.3
Ghostscript Version： 9.25 （2018-09-13）
Printing job in 16.04 is slower than in 14.04
We(RICOH printer driver developer) are report a problem from our printer
users:
I print file Ubuntu 14.04.5, CUPS 2.1.3,Ghostscript 9.25 is fast(12 Seconds).
But, after I update to Ubuntu 16.04, CUPS 2.1.3, Ghostscript 9.25, I
print the same file with the same driver is slow(326 Seconds).
I figure out that all the print jobs is much slower on Ubuntu 16.04.
I view the "CUPS Error Log", it shows that there are three points
which maybe the reasons that makes the print job slowly.
FIRST:
----------------------------------------------------------------------------
By counting the time from "Starting renderer" to "renderer exited with status
0", we figure out that 16.04 spend more time than 14.04 on "renderer" process.
So we assuming that："renderer" is one of the key process that makes the print
job slowly.
"Starting renderer with command: \"printf \'\\033%%-12345X@PJL
JOB\\012\';printf \'@PJL SET DATAMODE=TWIN\\ ........ @PJL
EOJ\\012\\033%%-12345X\'\""
.....
renderer exited with status 0"
----------------------------------------------------------------------------
SECOND:
============================================================================
On 16.04, a print job outputs lots of logs as below:
"[Job xxx] Removing document files."
This step(“Removing document files”)does not exsit on 14.04.
============================================================================
The phenomenon that print jobs slower in 16.04 is more obvious when printing
many jobs in the same time.
THIRD
We tried drivers form other company(HP,Brother…), the printings also slow
down in Ubuntu 16.04 than 14.04.
Our question is:
1. Do you have any plan to improve the performance of printing on Ubuntu
16.04?
2. Do you have any workaround before this problems fixed?
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/cups/+bug/1801496/+subscriptions
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