mirror of
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
synced 2025-09-04 20:19:47 +08:00
Documentation/rtla: Include BPF sample collection
Add dependencies needed to build rtla with BPF sample collection support to README, and document both ways of sample collection in the manpages. Signed-off-by: Tomas Glozar <tglozar@redhat.com> Acked-by: Steven Rostedt (Google) <rostedt@goodmis.org> Reviewed-by: Luis Claudio R. Goncalves <lgoncalv@redhat.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net> Link: https://lore.kernel.org/r/20250311114936.148012-5-tglozar@redhat.com
This commit is contained in:
parent
e7d3b24e34
commit
770840a0e7
@ -8,3 +8,11 @@ The *timerlat* tracer outputs information in two ways. It periodically
|
||||
prints the timer latency at the timer *IRQ* handler and the *Thread*
|
||||
handler. It also enables the trace of the most relevant information via
|
||||
**osnoise:** tracepoints.
|
||||
|
||||
The **rtla timerlat** tool sets the options of the *timerlat* tracer
|
||||
and collects and displays a summary of the results. By default,
|
||||
the collection is done synchronously in kernel space using a dedicated
|
||||
BPF program attached to the *timerlat* tracer. If either BPF or
|
||||
the **osnoise:timerlat_sample** tracepoint it attaches to is
|
||||
unavailable, the **rtla timerlat** tool falls back to using tracefs to
|
||||
process the data asynchronously in user space.
|
||||
|
@ -13,6 +13,13 @@ RTLA depends on the following libraries and tools:
|
||||
- libtraceevent
|
||||
- libcpupower (optional, for --deepest-idle-state)
|
||||
|
||||
For BPF sample collection support, the following extra dependencies are
|
||||
required:
|
||||
|
||||
- libbpf 1.0.0 or later
|
||||
- bpftool with skeleton support
|
||||
- clang with BPF CO-RE support
|
||||
|
||||
It also depends on python3-docutils to compile man pages.
|
||||
|
||||
For development, we suggest the following steps for compiling rtla:
|
||||
|
Loading…
Reference in New Issue
Block a user