Introduced compression of the metadata and trace data in trace files version
7. The compression is optional and disabled by default. A new parameter of
"trace-cmd record" is introduced, which can be used to configure the trace
file compression:
--compression < none / any / name of the desired algorithm >
This patch-set depends on "[PATCH v2 00/25] Trace file version 7 - sections",
should be applied on top of it:
https://lore.kernel.org/linux-trace-devel/20210913122947.3673239-1-tz.stoyanov@xxxxxxxxx/
Tzvetomir Stoyanov (VMware) (20):
trace-cmd library: Add support for compression algorithms
trace-cmd library: Internal helpers for compressing data
trace-cmd library: Internal helpers for uncompressing data
trace-cmd library: Inherit compression algorithm from input file
trace-cmd library: New API to configure compression on an output
handler
trace-cmd library: Write compression header in the trace file
trace-cmd library: Compress part of the trace file
trace-cmd library: Add local helper function for data compression
trace-cmd library: Compress the trace data
trace-cmd library: Decompress the options section, if it is compressed
trace-cmd library: Read compression header
trace-cmd library: Extend the input handler with trace data
decompression context
trace-cmd library: Initialize CPU data decompression logic
trace-cmd library: Add logic for in-memory decompression
trace-cmd library: Read compressed latency data
trace-cmd library: Decompress file sections on reading
trace-cmd library: Add zlib compression algorithm
trace-cmd list: Show supported compression algorithms
trace-cmd record: Add compression to the trace context
trace-cmd report: Add new parameter for trace file compression
Documentation/trace-cmd/trace-cmd-list.1.txt | 3 +
Makefile | 7 +
lib/trace-cmd/Makefile | 8 +
.../include/private/trace-cmd-private.h | 46 +-
lib/trace-cmd/include/trace-cmd-local.h | 17 +
lib/trace-cmd/trace-compress-zlib.c | 109 +++
lib/trace-cmd/trace-compress.c | 910 ++++++++++++++++++
lib/trace-cmd/trace-input.c | 465 ++++++++-
lib/trace-cmd/trace-output.c | 314 +++++-
lib/trace-cmd/trace-util.c | 10 +
tracecmd/Makefile | 4 +
tracecmd/trace-list.c | 26 +
tracecmd/trace-record.c | 34 +-
tracecmd/trace-usage.c | 6 +
14 files changed, 1887 insertions(+), 72 deletions(-)
create mode 100644 lib/trace-cmd/trace-compress-zlib.c
create mode 100644 lib/trace-cmd/trace-compress.c
--
2.31.1
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