From: "Steven Rostedt (Google)" <rostedt@xxxxxxxxxxx>
Add functions that allow applications to read the trace_pipe_raw files:
tracefs_cpu_create_fd()
tracefs_cpu_open()
tracefs_cpu_close()
tracefs_cpu_read_size()
tracefs_cpu_read()
tracefs_cpu_buffered_read()
tracefs_cpu_write()
tracefs_cpu_stop()
tracefs_cpu_flush()
tracefs_cpu_flush_write()
tracefs_cpu_pipe()
Changes since v1: https://lore.kernel.org/all/20221021182345.092cdb50@xxxxxxxxxxxxxxxxxx/
- Changed the names of tracefs_cpu_pipe_read() to tracefs_cpu_buffered_read()
and tracefs_cpu_pipe_write() to just tracefs_cpu_write()
- Added tracefs_cpu_create_fd() to attach to an already opened file descriptor
that could be just a copy of a trace_pipe_raw file, or to a socket for
remote tracing.
- Added tracefs_cpu_pipe() to write directly into a pipe (saves on a splice).
- Fixed some blocking issues.
- Added unit tests
Steven Rostedt (Google) (5):
libtracefs: Add reading of per cpu files
libtracefs: Add tracefs_cpu_create_fd()
libtracefs: Add tracefs_cpu_pipe()
libtracefs utest: Make helper functions for affinity
libtracefs: Add unit tests for tracefs_cpu functions
Documentation/libtracefs-cpu.txt | 239 +++++++++++++
Documentation/libtracefs.txt | 12 +
include/tracefs.h | 15 +
samples/Makefile | 1 +
scripts/utils.mk | 2 +-
src/Makefile | 1 +
src/tracefs-record.c | 586 +++++++++++++++++++++++++++++++
utest/tracefs-utest.c | 372 +++++++++++++++++++-
8 files changed, 1213 insertions(+), 15 deletions(-)
create mode 100644 Documentation/libtracefs-cpu.txt
create mode 100644 src/tracefs-record.c
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2.35.1
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