From mboxrd@z Thu Jan  1 00:00:00 1970
From: mathieu.desnoyers@efficios.com (Mathieu Desnoyers)
Date: Mon, 3 Feb 2014 16:12:00 +0000 (UTC)
Subject: [lttng-dev] Running 32bit sessiond on 64bit host
In-Reply-To: <6DB83340B9D38C4A9C0ECD8B6FBABDFB1A251458@ESESSMB105.ericsson.se>
References: <6DB83340B9D38C4A9C0ECD8B6FBABDFB1A251458@ESESSMB105.ericsson.se>
Message-ID: <1088723708.18175.1391443920124.JavaMail.zimbra@efficios.com>

----- Original Message -----
> From: "Stanislav Vovk" <stanislav.vovk@ericsson.com>
> To: lttng-dev at lists.lttng.org
> Sent: Thursday, September 26, 2013 9:44:07 AM
> Subject: [lttng-dev] Running 32bit sessiond on 64bit host
> 
> Hi,
> 
> Running a 32bit session deamon on a 64 bit host fails when creating a
> channel. The following  error message is given,
> 
> Default snapshot output set to: /tmp/ltt
> Snapshot mode set. Every channel enabled for that session will be set in
> overwrite mode and mmap output.
> Error: Channel ch_tri: 32-bit UST consumer start failed (session tri)
> Warning: Some command(s) went wrong
> 
> Running on,
> uname -a
> Linux esekilxxen3020 3.0.13-0.27-xen #1 SMP Wed Feb 15 13:33:49 UTC 2012
> (d73692b) x86_64 x86_64 x86_64 GNU/Linux
> 
> Is this intended to work or are there some limitations for this scenario?

Just for the records, you need to compile and install a 32-bit consumer
daemon in your system if you want to trace 32-bit applications on a system
containing 32-bit and 64-bit applications. The session daemon will
take care of dispatching application to consumer daemons with the appropriate
bitness. So if you want to trace both 32-bit and 64-bit applications, you
need to have both 32-bit and 64-bit consumer daemons.

Thanks,

Mathieu

> 
> Thanks,
> Stanislav
> 
> 
> 
> 

-- 
Mathieu Desnoyers
EfficiOS Inc.
http://www.efficios.com