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perf record: Implement COMPRESSED event record and its attributes

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Implemented PERF_RECORD_COMPRESSED event, related data types, header
feature and functions to write, read and print feature attributes from
the trace header section.

comp_mmap_len preserves the size of mmaped kernel buffer that was used
during collection. comp_mmap_len size is used on loading stage as the
size of decomp buffer for decompression of COMPRESSED events content.

Committer notes:

Fixed up conflict with BPF_PROG_INFO and BTF_BTF header features.

Signed-off-by: Alexey Budankov <alexey.budankov@linux.intel.com>
Reviewed-by: Jiri Olsa <jolsa@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/ebbaf031-8dda-3864-ebc6-7922d43ee515@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Alexey Budankov
2019-03-18 20:41:33 +03:00
committed by Arnaldo Carvalho de Melo
parent d3c8c08e75
commit 42e1fd80a5
8 changed files with 105 additions and 0 deletions
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7
tools/perf/util/event.h
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@@ -255,6 +255,7 @@ enum perf_user_event_type { /* above any possible kernel type */
PERF_RECORD_EVENT_UPDATE = 78,
PERF_RECORD_TIME_CONV = 79,
PERF_RECORD_HEADER_FEATURE = 80,
PERF_RECORD_COMPRESSED = 81,
PERF_RECORD_HEADER_MAX
};
@@ -627,6 +628,11 @@ struct feature_event {
char data[];
};
struct compressed_event {
struct perf_event_header header;
char data[];
};
union perf_event {
struct perf_event_header header;
struct mmap_event mmap;
@@ -660,6 +666,7 @@ union perf_event {
struct feature_event feat;
struct ksymbol_event ksymbol_event;
struct bpf_event bpf_event;
struct compressed_event pack;
};
void perf_event__print_totals(void);