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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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53
tools/perf/util/header.c
View file

@ -1344,6 +1344,30 @@ out:
return ret;
}
static int write_compressed(struct feat_fd *ff __maybe_unused,
struct perf_evlist *evlist __maybe_unused)
{
int ret;
ret = do_write(ff, &(ff->ph->env.comp_ver), sizeof(ff->ph->env.comp_ver));
if (ret)
return ret;
ret = do_write(ff, &(ff->ph->env.comp_type), sizeof(ff->ph->env.comp_type));
if (ret)
return ret;
ret = do_write(ff, &(ff->ph->env.comp_level), sizeof(ff->ph->env.comp_level));
if (ret)
return ret;
ret = do_write(ff, &(ff->ph->env.comp_ratio), sizeof(ff->ph->env.comp_ratio));
if (ret)
return ret;
return do_write(ff, &(ff->ph->env.comp_mmap_len), sizeof(ff->ph->env.comp_mmap_len));
}
static void print_hostname(struct feat_fd *ff, FILE *fp)
{
fprintf(fp, "# hostname : %s\n", ff->ph->env.hostname);
@ -1688,6 +1712,13 @@ static void print_cache(struct feat_fd *ff, FILE *fp __maybe_unused)
}
}
static void print_compressed(struct feat_fd *ff, FILE *fp)
{
fprintf(fp, "# compressed : %s, level = %d, ratio = %d\n",
ff->ph->env.comp_type == PERF_COMP_ZSTD ? "Zstd" : "Unknown",
ff->ph->env.comp_level, ff->ph->env.comp_ratio);
}
static void print_pmu_mappings(struct feat_fd *ff, FILE *fp)
{
const char *delimiter = "# pmu mappings: ";
@ -2667,6 +2698,27 @@ out:
return err;
}
static int process_compressed(struct feat_fd *ff,
void *data __maybe_unused)
{
if (do_read_u32(ff, &(ff->ph->env.comp_ver)))
return -1;
if (do_read_u32(ff, &(ff->ph->env.comp_type)))
return -1;
if (do_read_u32(ff, &(ff->ph->env.comp_level)))
return -1;
if (do_read_u32(ff, &(ff->ph->env.comp_ratio)))
return -1;
if (do_read_u32(ff, &(ff->ph->env.comp_mmap_len)))
return -1;
return 0;
}
struct feature_ops {
int (*write)(struct feat_fd *ff, struct perf_evlist *evlist);
void (*print)(struct feat_fd *ff, FILE *fp);
@ -2730,6 +2782,7 @@ static const struct feature_ops feat_ops[HEADER_LAST_FEATURE] = {
FEAT_OPN(DIR_FORMAT, dir_format, false),
FEAT_OPR(BPF_PROG_INFO, bpf_prog_info, false),
FEAT_OPR(BPF_BTF, bpf_btf, false),
FEAT_OPR(COMPRESSED, compressed, false),
};
struct header_print_data {