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perf mmap: Lazily initialize zstd streams to save memory when not using it

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Zstd streams create dictionaries that can require significant RAM,
especially when there is one per-CPU. Tools like 'perf record' won't use
the streams without the -z option, and so the creation of the streams
is pure overhead. Switch to creating the streams on first use.

Committer notes:

ssize_t comes from sys/types.h, size_t from stddef.h. This worked on
glibc as stdlib.h includes both, but not on musl libc. So do what 'man
size_t' says and include sys/types.h and stddef.h instead of stdlib.h

Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Athira Jajeev <atrajeev@linux.vnet.ibm.com>
Cc: Changbin Du <changbin.du@huawei.com>
Cc: Colin Ian King <colin.i.king@gmail.com>
Cc: Dmitrii Dolgov <9erthalion6@gmail.com>
Cc: German Gomez <german.gomez@arm.com>
Cc: Huacai Chen <chenhuacai@kernel.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@arm.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: K Prateek Nayak <kprateek.nayak@amd.com>
Cc: Kajol Jain <kjain@linux.ibm.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Li Dong <lidong@vivo.com>
Cc: Liam Howlett <liam.howlett@oracle.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Cc: Miguel Ojeda <ojeda@kernel.org>
Cc: Ming Wang <wangming01@loongson.cn>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Nick Terrell <terrelln@fb.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@amd.com>
Cc: Sandipan Das <sandipan.das@amd.com>
Cc: Sean Christopherson <seanjc@google.com>
Cc: Steinar H. Gunderson <sesse@google.com>
Cc: Vincent Whitchurch <vincent.whitchurch@axis.com>
Cc: Wenyu Liu <liuwenyu7@huawei.com>
Cc: Yang Jihong <yangjihong1@huawei.com>
Link: https://lore.kernel.org/r/20231102175735.2272696-5-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Ian Rogers
2023-11-02 10:56:46 -07:00
committed by Arnaldo Carvalho de Melo
parent d60469d7c0
commit 5940a20a18
5 changed files with 59 additions and 43 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
tools/perf/util/compress.h
View File

@ -3,6 +3,8 @@
#define PERF_COMPRESS_H
#include <stdbool.h>
#include <stddef.h>
#include <sys/types.h>
#ifdef HAVE_ZSTD_SUPPORT
#include <zstd.h>
#endif
@ -21,6 +23,7 @@ struct zstd_data {
#ifdef HAVE_ZSTD_SUPPORT
ZSTD_CStream *cstream;
ZSTD_DStream *dstream;
int comp_level;
#endif
};
@ -29,7 +32,7 @@ struct zstd_data {
int zstd_init(struct zstd_data *data, int level);
int zstd_fini(struct zstd_data *data);
size_t zstd_compress_stream_to_records(struct zstd_data *data, void *dst, size_t dst_size,
ssize_t zstd_compress_stream_to_records(struct zstd_data *data, void *dst, size_t dst_size,
void *src, size_t src_size, size_t max_record_size,
size_t process_header(void *record, size_t increment));
@ -48,7 +51,7 @@ static inline int zstd_fini(struct zstd_data *data __maybe_unused)
}
static inline
size_t zstd_compress_stream_to_records(struct zstd_data *data __maybe_unused,
ssize_t zstd_compress_stream_to_records(struct zstd_data *data __maybe_unused,
void *dst __maybe_unused, size_t dst_size __maybe_unused,
void *src __maybe_unused, size_t src_size __maybe_unused,
size_t max_record_size __maybe_unused,