X-Git-Url: https://git.lttng.org/?a=blobdiff_plain;f=README;h=746b1666fabb2de3ddcd3be4222a56f6494cb02e;hb=refs%2Fheads%2Flttng-ust-2.0;hp=ef11607f633d0fed55e70fa880015b24d940de82;hpb=1ffa770bdf4f22dfd0c3be0c0a3af0d2b4cca363;p=ust.git diff --git a/README b/README index ef11607..746b166 100644 --- a/README +++ b/README @@ -7,8 +7,8 @@ Updated versions of this package may be found at: * Website: http://lttng.org/ust * Releases: http://lttng.org/files/ust/releases - * GitWeb: http://git.dorsal.polymtl.ca (project: ust) - * Git: git://git.dorsal.polymtl.ca/git/ust.git + * GitWeb: http://git.lttng.org (project: ust) + * Git: git://git.lttng.org/ust.git PREREQUISITES: @@ -16,7 +16,7 @@ PREREQUISITES: - liburcu Userspace RCU library, by Mathieu Desnoyers and Paul E. McKenney - -> This release was tested with liburcu v0.4.3 + -> This release depends on liburcu v0.6.6 * Debian/Ubuntu package: liburcu-dev * Website: http://lttng.org/urcu @@ -38,56 +38,75 @@ INSTALLATION INSTRUCTIONS: the configure script, to generate it. +USAGE: + + - Create an instrumentation header following the tracepoint examples. + (see tracepoint.h and tests/hello/tp.h). + - Link application with -lust. + - (TODO: start tracing with the "lttng" command from lttng-tools) + +ENVIRONMENT VARIABLES: + + - liblttng-ust debug can be activated by setting the environment variable + "LTTNG_UST_DEBUG" when launching the application. It can also be enabled + at compile-time by compiling libust with -DLTTNG_UST_DEBUG. + + - The environment variable "LTTNG_UST_REGISTER_TIMEOUT" can be used to + specify how long the applications should wait for sessiond + "registration done" command before proceeding to execute the main + program. The default is 3000ms (3 seconds). The timeout value is + specified in milliseconds. The value 0 means "don't wait". The value + -1 means "wait forever". + + TRACE VIEWER: - LTTV is used for viewing UST traces. LTTV may be obtained at - http://lttng.org in the Downloads section. + Use babeltrace for viewing traces generated by LTTng UST 2.0. + See http://lttng.org for download. + + +CONTACT: - This release has been tested with LTTV 0.12.30. + Maintainer: Mathieu Desnoyers + Mailing list: ltt-dev@lists.casi.polymtl.ca PACKAGE CONTENTS: This package contains the following elements. - - libust + - liblttng-ust The actual userspace tracing library that must be linked to the instrumented programs. - - ustctl - A program to control the tracing of userspace applications. It can list - markers, start the tracing, stop the tracing, enable/disable markers, etc. - - include The public header files that will be installed on the system. - - ustd - The daemon that collects trace data and writes it to the disk. - - doc The documentation. - tests Various test programs - - libustinstr-malloc + - liblttng-ust-malloc An example library that can be LD_PRELOAD'ed to instrument calls to malloc() in any program without need to recompile it. - - libustfork + - liblttng-ust-fork A library that is LD_PRELOAD'ed, and that hijacks calls to several system calls in order to trace across these calls. It _has_ to be LD_PRELOAD'ed in order to hijack calls. In contrast, libust may be linked at build time. - - libustcmd - A library to control tracing in other processes. Used by ustctl. + - liblttng-ust-ctl + A library to control tracing in other processes. Used by lttng-tools. - - libustcomm - A static library shared between libust, ustd and libustcmd, that provides - functions that allow these components to communicate together. + - liblttng-ust-comm + A static library shared between libust and lttng-tools, that + provides functions that allow these components to communicate together. - snprintf An asynchronous signal-safe version of snprintf. - java A simple library that uses JNI to allow tracing in java programs. + See java/README for build instructions.