diff --git a/tools/perf/util/Build b/tools/perf/util/Build index 8dd3102301ea..6d5bbc8b589b 100644 --- a/tools/perf/util/Build +++ b/tools/perf/util/Build @@ -145,6 +145,8 @@ perf-y += scripting-engines/ perf-$(CONFIG_ZLIB) += zlib.o perf-$(CONFIG_LZMA) += lzma.o +perf-$(CONFIG_ZSTD) += zstd.o + perf-y += demangle-java.o perf-y += demangle-rust.o diff --git a/tools/perf/util/compress.h b/tools/perf/util/compress.h index 892e92e7e7fc..1041a4fd81e2 100644 --- a/tools/perf/util/compress.h +++ b/tools/perf/util/compress.h @@ -2,6 +2,11 @@ #ifndef PERF_COMPRESS_H #define PERF_COMPRESS_H +#include +#ifdef HAVE_ZSTD_SUPPORT +#include +#endif + #ifdef HAVE_ZLIB_SUPPORT int gzip_decompress_to_file(const char *input, int output_fd); bool gzip_is_compressed(const char *input); @@ -12,4 +17,41 @@ int lzma_decompress_to_file(const char *input, int output_fd); bool lzma_is_compressed(const char *input); #endif +struct zstd_data { +#ifdef HAVE_ZSTD_SUPPORT + ZSTD_CStream *cstream; +#endif +}; + +#ifdef HAVE_ZSTD_SUPPORT + +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, + void *src, size_t src_size, size_t max_record_size, + size_t process_header(void *record, size_t increment)); +#else /* !HAVE_ZSTD_SUPPORT */ + +static inline int zstd_init(struct zstd_data *data __maybe_unused, int level __maybe_unused) +{ + return 0; +} + +static inline int zstd_fini(struct zstd_data *data __maybe_unused) +{ + return 0; +} + +static inline +size_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, + size_t process_header(void *record, size_t increment) __maybe_unused) +{ + return 0; +} +#endif + #endif /* PERF_COMPRESS_H */ diff --git a/tools/perf/util/zstd.c b/tools/perf/util/zstd.c new file mode 100644 index 000000000000..359ec9a9d306 --- /dev/null +++ b/tools/perf/util/zstd.c @@ -0,0 +1,70 @@ +// SPDX-License-Identifier: GPL-2.0 + +#include + +#include "util/compress.h" +#include "util/debug.h" + +int zstd_init(struct zstd_data *data, int level) +{ + size_t ret; + + data->cstream = ZSTD_createCStream(); + if (data->cstream == NULL) { + pr_err("Couldn't create compression stream.\n"); + return -1; + } + + ret = ZSTD_initCStream(data->cstream, level); + if (ZSTD_isError(ret)) { + pr_err("Failed to initialize compression stream: %s\n", ZSTD_getErrorName(ret)); + return -1; + } + + return 0; +} + +int zstd_fini(struct zstd_data *data) +{ + if (data->cstream) { + ZSTD_freeCStream(data->cstream); + data->cstream = NULL; + } + + return 0; +} + +size_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)) +{ + size_t ret, size, compressed = 0; + ZSTD_inBuffer input = { src, src_size, 0 }; + ZSTD_outBuffer output; + void *record; + + while (input.pos < input.size) { + record = dst; + size = process_header(record, 0); + compressed += size; + dst += size; + dst_size -= size; + output = (ZSTD_outBuffer){ dst, (dst_size > max_record_size) ? + max_record_size : dst_size, 0 }; + ret = ZSTD_compressStream(data->cstream, &output, &input); + ZSTD_flushStream(data->cstream, &output); + if (ZSTD_isError(ret)) { + pr_err("failed to compress %ld bytes: %s\n", + (long)src_size, ZSTD_getErrorName(ret)); + memcpy(dst, src, src_size); + return src_size; + } + size = output.pos; + size = process_header(record, size); + compressed += size; + dst += size; + dst_size -= size; + } + + return compressed; +}