1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606
|
// Copyright 2011 Google Inc. All Rights Reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// Various stubs for the unit tests for the open-source version of Snappy.
#include "snappy-test.h"
#ifdef HAVE_WINDOWS_H
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
#endif
#include <algorithm>
DEFINE_bool(run_microbenchmarks, true,
"Run microbenchmarks before doing anything else.");
namespace snappy {
string ReadTestDataFile(const string& base, size_t size_limit) {
string contents;
const char* srcdir = getenv("srcdir"); // This is set by Automake.
string prefix;
if (srcdir) {
prefix = string(srcdir) + "/";
}
file::GetContents(prefix + "testdata/" + base, &contents, file::Defaults()
).CheckSuccess();
if (size_limit > 0) {
contents = contents.substr(0, size_limit);
}
return contents;
}
string ReadTestDataFile(const string& base) {
return ReadTestDataFile(base, 0);
}
string StringPrintf(const char* format, ...) {
char buf[4096];
va_list ap;
va_start(ap, format);
vsnprintf(buf, sizeof(buf), format, ap);
va_end(ap);
return buf;
}
bool benchmark_running = false;
int64 benchmark_real_time_us = 0;
int64 benchmark_cpu_time_us = 0;
string *benchmark_label = NULL;
int64 benchmark_bytes_processed = 0;
void ResetBenchmarkTiming() {
benchmark_real_time_us = 0;
benchmark_cpu_time_us = 0;
}
#ifdef WIN32
LARGE_INTEGER benchmark_start_real;
FILETIME benchmark_start_cpu;
#else // WIN32
struct timeval benchmark_start_real;
struct rusage benchmark_start_cpu;
#endif // WIN32
void StartBenchmarkTiming() {
#ifdef WIN32
QueryPerformanceCounter(&benchmark_start_real);
FILETIME dummy;
CHECK(GetProcessTimes(
GetCurrentProcess(), &dummy, &dummy, &dummy, &benchmark_start_cpu));
#else
gettimeofday(&benchmark_start_real, NULL);
if (getrusage(RUSAGE_SELF, &benchmark_start_cpu) == -1) {
perror("getrusage(RUSAGE_SELF)");
exit(1);
}
#endif
benchmark_running = true;
}
void StopBenchmarkTiming() {
if (!benchmark_running) {
return;
}
#ifdef WIN32
LARGE_INTEGER benchmark_stop_real;
LARGE_INTEGER benchmark_frequency;
QueryPerformanceCounter(&benchmark_stop_real);
QueryPerformanceFrequency(&benchmark_frequency);
double elapsed_real = static_cast<double>(
benchmark_stop_real.QuadPart - benchmark_start_real.QuadPart) /
benchmark_frequency.QuadPart;
benchmark_real_time_us += elapsed_real * 1e6 + 0.5;
FILETIME benchmark_stop_cpu, dummy;
CHECK(GetProcessTimes(
GetCurrentProcess(), &dummy, &dummy, &dummy, &benchmark_stop_cpu));
ULARGE_INTEGER start_ulargeint;
start_ulargeint.LowPart = benchmark_start_cpu.dwLowDateTime;
start_ulargeint.HighPart = benchmark_start_cpu.dwHighDateTime;
ULARGE_INTEGER stop_ulargeint;
stop_ulargeint.LowPart = benchmark_stop_cpu.dwLowDateTime;
stop_ulargeint.HighPart = benchmark_stop_cpu.dwHighDateTime;
benchmark_cpu_time_us +=
(stop_ulargeint.QuadPart - start_ulargeint.QuadPart + 5) / 10;
#else // WIN32
struct timeval benchmark_stop_real;
gettimeofday(&benchmark_stop_real, NULL);
benchmark_real_time_us +=
1000000 * (benchmark_stop_real.tv_sec - benchmark_start_real.tv_sec);
benchmark_real_time_us +=
(benchmark_stop_real.tv_usec - benchmark_start_real.tv_usec);
struct rusage benchmark_stop_cpu;
if (getrusage(RUSAGE_SELF, &benchmark_stop_cpu) == -1) {
perror("getrusage(RUSAGE_SELF)");
exit(1);
}
benchmark_cpu_time_us += 1000000 * (benchmark_stop_cpu.ru_utime.tv_sec -
benchmark_start_cpu.ru_utime.tv_sec);
benchmark_cpu_time_us += (benchmark_stop_cpu.ru_utime.tv_usec -
benchmark_start_cpu.ru_utime.tv_usec);
#endif // WIN32
benchmark_running = false;
}
void SetBenchmarkLabel(const string& str) {
if (benchmark_label) {
delete benchmark_label;
}
benchmark_label = new string(str);
}
void SetBenchmarkBytesProcessed(int64 bytes) {
benchmark_bytes_processed = bytes;
}
struct BenchmarkRun {
int64 real_time_us;
int64 cpu_time_us;
};
struct BenchmarkCompareCPUTime {
bool operator() (const BenchmarkRun& a, const BenchmarkRun& b) const {
return a.cpu_time_us < b.cpu_time_us;
}
};
void Benchmark::Run() {
for (int test_case_num = start_; test_case_num <= stop_; ++test_case_num) {
// Run a few iterations first to find out approximately how fast
// the benchmark is.
const int kCalibrateIterations = 100;
ResetBenchmarkTiming();
StartBenchmarkTiming();
(*function_)(kCalibrateIterations, test_case_num);
StopBenchmarkTiming();
// Let each test case run for about 200ms, but at least as many
// as we used to calibrate.
// Run five times and pick the median.
const int kNumRuns = 5;
const int kMedianPos = kNumRuns / 2;
int num_iterations = 0;
if (benchmark_real_time_us > 0) {
num_iterations = 200000 * kCalibrateIterations / benchmark_real_time_us;
}
num_iterations = max(num_iterations, kCalibrateIterations);
BenchmarkRun benchmark_runs[kNumRuns];
for (int run = 0; run < kNumRuns; ++run) {
ResetBenchmarkTiming();
StartBenchmarkTiming();
(*function_)(num_iterations, test_case_num);
StopBenchmarkTiming();
benchmark_runs[run].real_time_us = benchmark_real_time_us;
benchmark_runs[run].cpu_time_us = benchmark_cpu_time_us;
}
string heading = StringPrintf("%s/%d", name_.c_str(), test_case_num);
string human_readable_speed;
nth_element(benchmark_runs,
benchmark_runs + kMedianPos,
benchmark_runs + kNumRuns,
BenchmarkCompareCPUTime());
int64 real_time_us = benchmark_runs[kMedianPos].real_time_us;
int64 cpu_time_us = benchmark_runs[kMedianPos].cpu_time_us;
if (cpu_time_us <= 0) {
human_readable_speed = "?";
} else {
int64 bytes_per_second =
benchmark_bytes_processed * 1000000 / cpu_time_us;
if (bytes_per_second < 1024) {
human_readable_speed = StringPrintf("%dB/s", bytes_per_second);
} else if (bytes_per_second < 1024 * 1024) {
human_readable_speed = StringPrintf(
"%.1fkB/s", bytes_per_second / 1024.0f);
} else if (bytes_per_second < 1024 * 1024 * 1024) {
human_readable_speed = StringPrintf(
"%.1fMB/s", bytes_per_second / (1024.0f * 1024.0f));
} else {
human_readable_speed = StringPrintf(
"%.1fGB/s", bytes_per_second / (1024.0f * 1024.0f * 1024.0f));
}
}
fprintf(stderr,
#ifdef WIN32
"%-18s %10I64d %10I64d %10d %s %s\n",
#else
"%-18s %10lld %10lld %10d %s %s\n",
#endif
heading.c_str(),
static_cast<long long>(real_time_us * 1000 / num_iterations),
static_cast<long long>(cpu_time_us * 1000 / num_iterations),
num_iterations,
human_readable_speed.c_str(),
benchmark_label->c_str());
}
}
#ifdef HAVE_LIBZ
ZLib::ZLib()
: comp_init_(false),
uncomp_init_(false) {
Reinit();
}
ZLib::~ZLib() {
if (comp_init_) { deflateEnd(&comp_stream_); }
if (uncomp_init_) { inflateEnd(&uncomp_stream_); }
}
void ZLib::Reinit() {
compression_level_ = Z_DEFAULT_COMPRESSION;
window_bits_ = MAX_WBITS;
mem_level_ = 8; // DEF_MEM_LEVEL
if (comp_init_) {
deflateEnd(&comp_stream_);
comp_init_ = false;
}
if (uncomp_init_) {
inflateEnd(&uncomp_stream_);
uncomp_init_ = false;
}
first_chunk_ = true;
}
void ZLib::Reset() {
first_chunk_ = true;
}
// --------- COMPRESS MODE
// Initialization method to be called if we hit an error while
// compressing. On hitting an error, call this method before returning
// the error.
void ZLib::CompressErrorInit() {
deflateEnd(&comp_stream_);
comp_init_ = false;
Reset();
}
int ZLib::DeflateInit() {
return deflateInit2(&comp_stream_,
compression_level_,
Z_DEFLATED,
window_bits_,
mem_level_,
Z_DEFAULT_STRATEGY);
}
int ZLib::CompressInit(Bytef *dest, uLongf *destLen,
const Bytef *source, uLong *sourceLen) {
int err;
comp_stream_.next_in = (Bytef*)source;
comp_stream_.avail_in = (uInt)*sourceLen;
if ((uLong)comp_stream_.avail_in != *sourceLen) return Z_BUF_ERROR;
comp_stream_.next_out = dest;
comp_stream_.avail_out = (uInt)*destLen;
if ((uLong)comp_stream_.avail_out != *destLen) return Z_BUF_ERROR;
if ( !first_chunk_ ) // only need to set up stream the first time through
return Z_OK;
if (comp_init_) { // we've already initted it
err = deflateReset(&comp_stream_);
if (err != Z_OK) {
LOG(WARNING) << "ERROR: Can't reset compress object; creating a new one";
deflateEnd(&comp_stream_);
comp_init_ = false;
}
}
if (!comp_init_) { // first use
comp_stream_.zalloc = (alloc_func)0;
comp_stream_.zfree = (free_func)0;
comp_stream_.opaque = (voidpf)0;
err = DeflateInit();
if (err != Z_OK) return err;
comp_init_ = true;
}
return Z_OK;
}
// In a perfect world we'd always have the full buffer to compress
// when the time came, and we could just call Compress(). Alas, we
// want to do chunked compression on our webserver. In this
// application, we compress the header, send it off, then compress the
// results, send them off, then compress the footer. Thus we need to
// use the chunked compression features of zlib.
int ZLib::CompressAtMostOrAll(Bytef *dest, uLongf *destLen,
const Bytef *source, uLong *sourceLen,
int flush_mode) { // Z_FULL_FLUSH or Z_FINISH
int err;
if ( (err=CompressInit(dest, destLen, source, sourceLen)) != Z_OK )
return err;
// This is used to figure out how many bytes we wrote *this chunk*
int compressed_size = comp_stream_.total_out;
// Some setup happens only for the first chunk we compress in a run
if ( first_chunk_ ) {
first_chunk_ = false;
}
// flush_mode is Z_FINISH for all mode, Z_SYNC_FLUSH for incremental
// compression.
err = deflate(&comp_stream_, flush_mode);
*sourceLen = comp_stream_.avail_in;
if ((err == Z_STREAM_END || err == Z_OK)
&& comp_stream_.avail_in == 0
&& comp_stream_.avail_out != 0 ) {
// we processed everything ok and the output buffer was large enough.
;
} else if (err == Z_STREAM_END && comp_stream_.avail_in > 0) {
return Z_BUF_ERROR; // should never happen
} else if (err != Z_OK && err != Z_STREAM_END && err != Z_BUF_ERROR) {
// an error happened
CompressErrorInit();
return err;
} else if (comp_stream_.avail_out == 0) { // not enough space
err = Z_BUF_ERROR;
}
assert(err == Z_OK || err == Z_STREAM_END || err == Z_BUF_ERROR);
if (err == Z_STREAM_END)
err = Z_OK;
// update the crc and other metadata
compressed_size = comp_stream_.total_out - compressed_size; // delta
*destLen = compressed_size;
return err;
}
int ZLib::CompressChunkOrAll(Bytef *dest, uLongf *destLen,
const Bytef *source, uLong sourceLen,
int flush_mode) { // Z_FULL_FLUSH or Z_FINISH
const int ret =
CompressAtMostOrAll(dest, destLen, source, &sourceLen, flush_mode);
if (ret == Z_BUF_ERROR)
CompressErrorInit();
return ret;
}
// This routine only initializes the compression stream once. Thereafter, it
// just does a deflateReset on the stream, which should be faster.
int ZLib::Compress(Bytef *dest, uLongf *destLen,
const Bytef *source, uLong sourceLen) {
int err;
if ( (err=CompressChunkOrAll(dest, destLen, source, sourceLen,
Z_FINISH)) != Z_OK )
return err;
Reset(); // reset for next call to Compress
return Z_OK;
}
// --------- UNCOMPRESS MODE
int ZLib::InflateInit() {
return inflateInit2(&uncomp_stream_, MAX_WBITS);
}
// Initialization method to be called if we hit an error while
// uncompressing. On hitting an error, call this method before
// returning the error.
void ZLib::UncompressErrorInit() {
inflateEnd(&uncomp_stream_);
uncomp_init_ = false;
Reset();
}
int ZLib::UncompressInit(Bytef *dest, uLongf *destLen,
const Bytef *source, uLong *sourceLen) {
int err;
uncomp_stream_.next_in = (Bytef*)source;
uncomp_stream_.avail_in = (uInt)*sourceLen;
// Check for source > 64K on 16-bit machine:
if ((uLong)uncomp_stream_.avail_in != *sourceLen) return Z_BUF_ERROR;
uncomp_stream_.next_out = dest;
uncomp_stream_.avail_out = (uInt)*destLen;
if ((uLong)uncomp_stream_.avail_out != *destLen) return Z_BUF_ERROR;
if ( !first_chunk_ ) // only need to set up stream the first time through
return Z_OK;
if (uncomp_init_) { // we've already initted it
err = inflateReset(&uncomp_stream_);
if (err != Z_OK) {
LOG(WARNING)
<< "ERROR: Can't reset uncompress object; creating a new one";
UncompressErrorInit();
}
}
if (!uncomp_init_) {
uncomp_stream_.zalloc = (alloc_func)0;
uncomp_stream_.zfree = (free_func)0;
uncomp_stream_.opaque = (voidpf)0;
err = InflateInit();
if (err != Z_OK) return err;
uncomp_init_ = true;
}
return Z_OK;
}
// If you compressed your data a chunk at a time, with CompressChunk,
// you can uncompress it a chunk at a time with UncompressChunk.
// Only difference bewteen chunked and unchunked uncompression
// is the flush mode we use: Z_SYNC_FLUSH (chunked) or Z_FINISH (unchunked).
int ZLib::UncompressAtMostOrAll(Bytef *dest, uLongf *destLen,
const Bytef *source, uLong *sourceLen,
int flush_mode) { // Z_SYNC_FLUSH or Z_FINISH
int err = Z_OK;
if ( (err=UncompressInit(dest, destLen, source, sourceLen)) != Z_OK ) {
LOG(WARNING) << "UncompressInit: Error: " << err << " SourceLen: "
<< *sourceLen;
return err;
}
// This is used to figure out how many output bytes we wrote *this chunk*:
const uLong old_total_out = uncomp_stream_.total_out;
// This is used to figure out how many input bytes we read *this chunk*:
const uLong old_total_in = uncomp_stream_.total_in;
// Some setup happens only for the first chunk we compress in a run
if ( first_chunk_ ) {
first_chunk_ = false; // so we don't do this again
// For the first chunk *only* (to avoid infinite troubles), we let
// there be no actual data to uncompress. This sometimes triggers
// when the input is only the gzip header, say.
if ( *sourceLen == 0 ) {
*destLen = 0;
return Z_OK;
}
}
// We'll uncompress as much as we can. If we end OK great, otherwise
// if we get an error that seems to be the gzip footer, we store the
// gzip footer and return OK, otherwise we return the error.
// flush_mode is Z_SYNC_FLUSH for chunked mode, Z_FINISH for all mode.
err = inflate(&uncomp_stream_, flush_mode);
// Figure out how many bytes of the input zlib slurped up:
const uLong bytes_read = uncomp_stream_.total_in - old_total_in;
CHECK_LE(source + bytes_read, source + *sourceLen);
*sourceLen = uncomp_stream_.avail_in;
if ((err == Z_STREAM_END || err == Z_OK) // everything went ok
&& uncomp_stream_.avail_in == 0) { // and we read it all
;
} else if (err == Z_STREAM_END && uncomp_stream_.avail_in > 0) {
LOG(WARNING)
<< "UncompressChunkOrAll: Received some extra data, bytes total: "
<< uncomp_stream_.avail_in << " bytes: "
<< string(reinterpret_cast<const char *>(uncomp_stream_.next_in),
min(int(uncomp_stream_.avail_in), 20));
UncompressErrorInit();
return Z_DATA_ERROR; // what's the extra data for?
} else if (err != Z_OK && err != Z_STREAM_END && err != Z_BUF_ERROR) {
// an error happened
LOG(WARNING) << "UncompressChunkOrAll: Error: " << err
<< " avail_out: " << uncomp_stream_.avail_out;
UncompressErrorInit();
return err;
} else if (uncomp_stream_.avail_out == 0) {
err = Z_BUF_ERROR;
}
assert(err == Z_OK || err == Z_BUF_ERROR || err == Z_STREAM_END);
if (err == Z_STREAM_END)
err = Z_OK;
*destLen = uncomp_stream_.total_out - old_total_out; // size for this call
return err;
}
int ZLib::UncompressChunkOrAll(Bytef *dest, uLongf *destLen,
const Bytef *source, uLong sourceLen,
int flush_mode) { // Z_SYNC_FLUSH or Z_FINISH
const int ret =
UncompressAtMostOrAll(dest, destLen, source, &sourceLen, flush_mode);
if (ret == Z_BUF_ERROR)
UncompressErrorInit();
return ret;
}
int ZLib::UncompressAtMost(Bytef *dest, uLongf *destLen,
const Bytef *source, uLong *sourceLen) {
return UncompressAtMostOrAll(dest, destLen, source, sourceLen, Z_SYNC_FLUSH);
}
// We make sure we've uncompressed everything, that is, the current
// uncompress stream is at a compressed-buffer-EOF boundary. In gzip
// mode, we also check the gzip footer to make sure we pass the gzip
// consistency checks. We RETURN true iff both types of checks pass.
bool ZLib::UncompressChunkDone() {
assert(!first_chunk_ && uncomp_init_);
// Make sure we're at the end-of-compressed-data point. This means
// if we call inflate with Z_FINISH we won't consume any input or
// write any output
Bytef dummyin, dummyout;
uLongf dummylen = 0;
if ( UncompressChunkOrAll(&dummyout, &dummylen, &dummyin, 0, Z_FINISH)
!= Z_OK ) {
return false;
}
// Make sure that when we exit, we can start a new round of chunks later
Reset();
return true;
}
// Uncompresses the source buffer into the destination buffer.
// The destination buffer must be long enough to hold the entire
// decompressed contents.
//
// We only initialize the uncomp_stream once. Thereafter, we use
// inflateReset, which should be faster.
//
// Returns Z_OK on success, otherwise, it returns a zlib error code.
int ZLib::Uncompress(Bytef *dest, uLongf *destLen,
const Bytef *source, uLong sourceLen) {
int err;
if ( (err=UncompressChunkOrAll(dest, destLen, source, sourceLen,
Z_FINISH)) != Z_OK ) {
Reset(); // let us try to compress again
return err;
}
if ( !UncompressChunkDone() ) // calls Reset()
return Z_DATA_ERROR;
return Z_OK; // stream_end is ok
}
#endif // HAVE_LIBZ
} // namespace snappy
|