From 95dc6256bf2342cfb8b4db78a316508e8aae7ad2 Mon Sep 17 00:00:00 2001 From: David Goulet Date: Tue, 20 Mar 2012 16:09:51 -0400 Subject: [PATCH] Fix. add limitation to man page Signed-off-by: David Goulet --- doc/man/lttng-sessiond.8 | 19 ++++++++++++++++--- 1 file changed, 16 insertions(+), 3 deletions(-) diff --git a/doc/man/lttng-sessiond.8 b/doc/man/lttng-sessiond.8 index 00656d21a..b8b9906ad 100644 --- a/doc/man/lttng-sessiond.8 +++ b/doc/man/lttng-sessiond.8 @@ -20,7 +20,7 @@ systems is also possible. The session daemon, acting as a tracing registry, allow you to interact with multiple tracers (kernel and user-space) inside the same container, a tracing session. Trace can be gathered from the kernel and/or instrumented applications -(lttng-ust(3)). Aggregating those traces is done using a viewer, like the +(lttng-ust(3)). Aggregating those traces is done using a viewer, like the babeltrace(1) text viewer. In order to trace the kernel, the session daemon needs to be running as root. @@ -137,6 +137,19 @@ debuggers to work with sessiond on some operating systems. .PP babeltrace(1), lttng-ust(3), lttng(1) .PP + +.SH "LIMITATIONS" + +.PP +For unprivileged user running lttng-sessiond, the maximum number of file +descriptors per process is usually 1024. This limits the number of traceable +applications since for each instrumented application there is two file +descriptors per-CPU and one more socktet for bidirectional communication. + +For the root user, the limit is bumped to 65535. Future version will deal with +this limitation. +.PP + .SH "BUGS" .PP @@ -163,8 +176,8 @@ You can find us on IRC server irc.oftc.net (OFTC) in #lttng. .PP Thanks to Yannick Brosseau without whom this project would never have been so -lean and mean! Also thanks to the Ericsson teams working on tracing which -helped us greatly with detailed bug reports and unusual test cases. +lean and mean! Also thanks to the Ericsson teams working on tracing which helped +us greatly with detailed bug reports and unusual test cases. Thanks to our beloved packager Alexandre Montplaisir-Goncalves (Ubuntu and PPA maintainer) and Jon Bernard for our Debian packages. -- 2.34.1