Messages in this thread | | | Date | Sat, 4 Apr 2020 20:07:23 -0400 | From | Steven Rostedt <> | Subject | [GIT PULL] tracing: Updates for 5.7 |
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Linus,
New tracing features:
- The ring buffer is no longer disabled when reading the trace file. The trace_pipe file was made to be used for live tracing and reading as it acted like the normal producer/consumer. As the trace file would not consume the data, the easy way of handling it was to just disable writes to the ring buffer. This came to a surprise to the BPF folks who complained about lost events due to reading. This is no longer an issue. If someone wants to keep the old disabling there's a new option "pause-on-trace" that can be set.
- New set_ftrace_notrace_pid file. PIDs in this file will not be traced by the function tracer. Similar to set_ftrace_pid, which makes the function tracer only trace those tasks with PIDs in the file, the set_ftrace_notrace_pid does the reverse.
- New set_event_notrace_pid file. PIDs in this file will cause events not to be traced if triggered by a task with a matching PID. Similar to the set_event_pid file but will not be traced. Note, sched_waking and sched_switch events may still be trace if one of the tasks referenced by those events contains a PID that is allowed to be traced.
Tracing related features:
- New bootconfig option, that is attached to the initrd file. If bootconfig is on the command line, then the initrd file is searched looking for a bootconfig appended at the end.
- New GPU tracepoint infrastructure to help the gfx drivers to get off debugfs (acked by Greg Kroah-Hartman)
Other minor updates and fixes.
Please pull the latest trace-v5.7 tree, which can be found at:
git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace.git trace-v5.7
Tag SHA1: 7c483089c1d670b55a9b2d574a74b6c0f6481544 Head SHA1: 8e99cf91b99bb30e16727f10ad6828741c0e992f
Masami Hiramatsu (3): bootconfig: Support O=<builddir> option tools/bootconfig: Show line and column in parse error ftrace/kprobe: Show the maxactive number on kprobe_events
Nathan Chancellor (1): tracing: Use address-of operator on section symbols
Steven Rostedt (VMware) (22): tracing: Have hwlat ts be first instance and record count of instances tracing: Remove unused TRACE_BUFFER bits selftest/ftrace: Fix function trigger test to handle trace not disabling the tracer tracing: Save off entry when peeking at next entry ring-buffer: Have ring_buffer_empty() not depend on tracing stopped ring-buffer: Rename ring_buffer_read() to read_buffer_iter_advance() ring-buffer: Add page_stamp to iterator for synchronization ring-buffer: Have rb_iter_head_event() handle concurrent writer ring-buffer: Do not die if rb_iter_peek() fails more than thrice ring-buffer: Optimize rb_iter_head_event() ring-buffer: Make resize disable per cpu buffer instead of total buffer ring-buffer: Do not disable recording when there is an iterator tracing: Do not disable tracing when reading the trace file ring-buffer/tracing: Have iterator acknowledge dropped events tracing: Have the document reflect that the trace file keeps tracing enabled ftrace: Make function trace pid filtering a bit more exact ftrace: Create set_ftrace_notrace_pid to not trace tasks tracing: Create set_event_notrace_pid to not trace tasks selftests/ftrace: Add test to test new set_ftrace_notrace_pid file selftests/ftrace: Add test to test new set_event_notrace_pid file tracing: Add documentation on set_ftrace_notrace_pid and set_event_notrace_pid tracing: Do not allocate buffer in trace_find_next_entry() in atomic
Yiwei Zhang (1): gpu/trace: add a gpu total memory usage tracepoint
---- Documentation/trace/ftrace.rst | 82 ++++-- drivers/Kconfig | 2 + drivers/gpu/Makefile | 1 + drivers/gpu/trace/Kconfig | 4 + drivers/gpu/trace/Makefile | 3 + drivers/gpu/trace/trace_gpu_mem.c | 13 + include/linux/bootconfig.h | 3 +- include/linux/ring_buffer.h | 4 +- include/linux/trace_events.h | 2 + include/trace/events/gpu_mem.h | 57 +++++ init/main.c | 14 +- kernel/trace/ftrace.c | 200 +++++++++++++-- kernel/trace/ring_buffer.c | 239 ++++++++++++------ kernel/trace/trace.c | 110 ++++++-- kernel/trace/trace.h | 39 ++- kernel/trace/trace_entries.h | 4 +- kernel/trace/trace_events.c | 280 ++++++++++++++++----- kernel/trace/trace_functions_graph.c | 2 +- kernel/trace/trace_hwlat.c | 24 +- kernel/trace/trace_kprobe.c | 2 + kernel/trace/trace_output.c | 19 +- lib/bootconfig.c | 35 ++- tools/bootconfig/Makefile | 27 +- tools/bootconfig/main.c | 35 ++- tools/bootconfig/test-bootconfig.sh | 14 +- .../selftests/ftrace/test.d/event/event-no-pid.tc | 125 +++++++++ .../test.d/ftrace/func-filter-notrace-pid.tc | 108 ++++++++ .../test.d/ftrace/func_traceonoff_triggers.tc | 2 +- 28 files changed, 1194 insertions(+), 256 deletions(-) create mode 100644 drivers/gpu/trace/Kconfig create mode 100644 drivers/gpu/trace/Makefile create mode 100644 drivers/gpu/trace/trace_gpu_mem.c create mode 100644 include/trace/events/gpu_mem.h create mode 100644 tools/testing/selftests/ftrace/test.d/event/event-no-pid.tc create mode 100644 tools/testing/selftests/ftrace/test.d/ftrace/func-filter-notrace-pid.tc ---------------------------
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