Strange Calibre errors when BOINC is running on GPU in background [Linux]

gedoens · 04-29-2016, 05:17 AM

The worker process (calibre-parallel) often fails when BOINC is running on GPU in background.

The pipe connection seems to be instable. There are a lot of error messages like "... pipe closed unexpected" or "Something strange happened. The worker process was aborted without an exception."

These error occur when:

Opening ebooks (reader)
Exporting ebooks to disk
Importing ebooks from disk

BOINC only uses the GPU (AMD Readon HD 6570) for OpenCL calculations. All CPU cores are free. CPU load < 4%

When stopping BOINC or switching GPU calculation to CPU calculation mode the errors disappear.

The errors also occur when connecting to Calibre over LAN (SSH + X11) from another computer. Calibre runs on desktop server but resulting GUI is displayed over network on client laptop computer. This configuration works fine, but there are often these strange errors with broken pipes.

Is there a way to make Calibre's pipe connections more stable?

kovidgoyal · 04-29-2016, 05:31 AM

calibre's pipe connections are standard unix pipes. I have no idea how one makes them "more stable".

DrChiper · 04-29-2016, 05:46 AM

Pipes are kernel entities, just for inter process communication (within the same host). When using as part of a network connection, that connection can be lost (network connections tend to break), hence also a "broken" pipe.
Sockets and STREAMS are the only two forms that are generally supported for IPC between processes on different hosts.

04-29-2016, 05:17 AM	#1
gedoens Junior Member Posts: 1 Karma: 10 Join Date: Apr 2016 Device: Kindle	Strange Calibre errors when BOINC is running on GPU in background [Linux] The worker process (calibre-parallel) often fails when BOINC is running on GPU in background. The pipe connection seems to be instable. There are a lot of error messages like "... pipe closed unexpected" or "Something strange happened. The worker process was aborted without an exception." These error occur when: Opening ebooks (reader) Exporting ebooks to disk Importing ebooks from disk BOINC only uses the GPU (AMD Readon HD 6570) for OpenCL calculations. All CPU cores are free. CPU load < 4% When stopping BOINC or switching GPU calculation to CPU calculation mode the errors disappear. The errors also occur when connecting to Calibre over LAN (SSH + X11) from another computer. Calibre runs on desktop server but resulting GUI is displayed over network on client laptop computer. This configuration works fine, but there are often these strange errors with broken pipes. Is there a way to make Calibre's pipe connections more stable?

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Calibre-server / Linux don't see calibreDB update when it's running	aurigod	Calibre	13	11-25-2015 02:44 AM
Error with Library on Windows partition while running Calibre in Xubuntu linux	senordustball	Library Management	4	06-28-2014 10:33 PM
OT-ish: Calibre in VirtualBox/Linux running Windows XP Client	Gwen Morse	Devices	9	04-14-2011 10:28 AM
Apps running in the background	devseev	enTourage Archive	14	10-25-2010 04:24 AM
apps running in background?	kejia	Spring Design Alex	0	05-13-2010 03:55 PM

04-29-2016, 05:31 AM	#2
kovidgoyal creator of calibre Posts: 43,965 Karma: 22669822 Join Date: Oct 2006 Location: Mumbai, India Device: Various	calibre's pipe connections are standard unix pipes. I have no idea how one makes them "more stable".

04-29-2016, 05:46 AM	#3
DrChiper Bookish Posts: 918 Karma: 1803094 Join Date: Jun 2011 Device: PC, t1, t2, t3, aura 2 v1, clara HD, Libra 2, Nxtpaper 11	Pipes are kernel entities, just for inter process communication (within the same host). When using as part of a network connection, that connection can be lost (network connections tend to break), hence also a "broken" pipe. Sockets and STREAMS are the only two forms that are generally supported for IPC between processes on different hosts.

Advert