update perf presentation

Signed-off-by: Manuel Traut <manut@mecka.net>

1 files changed, 11 insertions, 0 deletions

diff --git a/kernel-devel/kernel-perf/pres_kernel-perf_en.tex b/kernel-devel/kernel-perf/pres_kernel-perf_en.tex
index 893aa70..b6edfc0 100644
--- a/kernel-devel/kernel-perf/pres_kernel-perf_en.tex
+++ b/kernel-devel/kernel-perf/pres_kernel-perf_en.tex
@@ -10,7 +10,9 @@ Perf is a profiler tool for Linux 2.6+ based systems.
 \begin{itemize}
 \item perf\_events interface of the Linux kernel
 \item perf userspace tool
+\item access perf events from own applications
 \end{itemize}
+Perf is an event counter, no tracer.
 \end{frame}
 
 \begin{frame}
@@ -45,6 +47,15 @@ Perf is a profiler tool for Linux 2.6+ based systems.
 \end{description}
 \end{frame}
 
+
+\begin{frame}
+\frametitle{selecting events}
+\begin{description}
+\item[-e] use the specified event
+\item[-f] filter events, e.g. -e irq:irq\_handler\_entry --filter irq==18
+\end{description}
+\end{frame}
+
 \begin{frame}[fragile]
 \frametitle{Example: live-view of page-fault event}
 \begin{lstlisting}