/* $Id: tstCompressionBenchmark.cpp 44529 2013-02-04 15:54:15Z vboxsync $ */ /** @file * Compression Benchmark for SSM and PGM. */ /* * Copyright (C) 2009-2011 Oracle Corporation * * This file is part of VirtualBox Open Source Edition (OSE), as * available from http://www.virtualbox.org. This file is free software; * you can redistribute it and/or modify it under the terms of the GNU * General Public License (GPL) as published by the Free Software * Foundation, in version 2 as it comes in the "COPYING" file of the * VirtualBox OSE distribution. VirtualBox OSE is distributed in the * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind. */ /******************************************************************************* * Header Files * *******************************************************************************/ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include /******************************************************************************* * Global Variables * *******************************************************************************/ static size_t g_cPages = 20*_1M / PAGE_SIZE; static size_t g_cbPages; static uint8_t *g_pabSrc; /** Buffer for the decompressed data (g_cbPages). */ static uint8_t *g_pabDecompr; /** Buffer for the compressed data (g_cbComprAlloc). */ static uint8_t *g_pabCompr; /** The current size of the compressed data, ComprOutCallback */ static size_t g_cbCompr; /** The current offset into the compressed data, DecomprInCallback. */ static size_t g_offComprIn; /** The amount of space allocated for compressed data. */ static size_t g_cbComprAlloc; /** * Store compressed data in the g_pabCompr buffer. */ static DECLCALLBACK(int) ComprOutCallback(void *pvUser, const void *pvBuf, size_t cbBuf) { NOREF(pvUser); AssertReturn(g_cbCompr + cbBuf <= g_cbComprAlloc, VERR_BUFFER_OVERFLOW); memcpy(&g_pabCompr[g_cbCompr], pvBuf, cbBuf); g_cbCompr += cbBuf; return VINF_SUCCESS; } /** * Read compressed data from g_pabComrp. */ static DECLCALLBACK(int) DecomprInCallback(void *pvUser, void *pvBuf, size_t cbBuf, size_t *pcbBuf) { NOREF(pvUser); size_t cb = RT_MIN(cbBuf, g_cbCompr - g_offComprIn); if (pcbBuf) *pcbBuf = cb; // AssertReturn(cb > 0, VERR_EOF); memcpy(pvBuf, &g_pabCompr[g_offComprIn], cb); g_offComprIn += cb; return VINF_SUCCESS; } /** * Benchmark RTCrc routines potentially relevant for SSM or PGM - All in one go. * * @param pabSrc Pointer to the test data. * @param cbSrc The size of the test data. */ static void tstBenchmarkCRCsAllInOne(uint8_t const *pabSrc, size_t cbSrc) { RTPrintf("Algorithm Speed Time Digest\n" "------------------------------------------------------------------------------\n"); uint64_t NanoTS = RTTimeNanoTS(); uint32_t u32Crc = RTCrc32(pabSrc, cbSrc); NanoTS = RTTimeNanoTS() - NanoTS; unsigned uSpeed = (unsigned)(cbSrc / (long double)NanoTS * 1000000000.0 / 1024); RTPrintf("CRC-32 %'9u KB/s %'15llu ns - %08x\n", uSpeed, NanoTS, u32Crc); NanoTS = RTTimeNanoTS(); uint64_t u64Crc = RTCrc64(pabSrc, cbSrc); NanoTS = RTTimeNanoTS() - NanoTS; uSpeed = (unsigned)(cbSrc / (long double)NanoTS * 1000000000.0 / 1024); RTPrintf("CRC-64 %'9u KB/s %'15llu ns - %016llx\n", uSpeed, NanoTS, u64Crc); NanoTS = RTTimeNanoTS(); u32Crc = RTCrcAdler32(pabSrc, cbSrc); NanoTS = RTTimeNanoTS() - NanoTS; uSpeed = (unsigned)(cbSrc / (long double)NanoTS * 1000000000.0 / 1024); RTPrintf("Adler-32 %'9u KB/s %'15llu ns - %08x\n", uSpeed, NanoTS, u32Crc); NanoTS = RTTimeNanoTS(); uint8_t abMd5Hash[RTMD5HASHSIZE]; RTMd5(pabSrc, cbSrc, abMd5Hash); NanoTS = RTTimeNanoTS() - NanoTS; uSpeed = (unsigned)(cbSrc / (long double)NanoTS * 1000000000.0 / 1024); char szDigest[257]; RTMd5ToString(abMd5Hash, szDigest, sizeof(szDigest)); RTPrintf("MD5 %'9u KB/s %'15llu ns - %s\n", uSpeed, NanoTS, szDigest); NanoTS = RTTimeNanoTS(); uint8_t abSha1Hash[RTSHA1_HASH_SIZE]; RTSha1(pabSrc, cbSrc, abSha1Hash); NanoTS = RTTimeNanoTS() - NanoTS; uSpeed = (unsigned)(cbSrc / (long double)NanoTS * 1000000000.0 / 1024); RTSha1ToString(abSha1Hash, szDigest, sizeof(szDigest)); RTPrintf("SHA-1 %'9u KB/s %'15llu ns - %s\n", uSpeed, NanoTS, szDigest); NanoTS = RTTimeNanoTS(); uint8_t abSha256Hash[RTSHA256_HASH_SIZE]; RTSha256(pabSrc, cbSrc, abSha256Hash); NanoTS = RTTimeNanoTS() - NanoTS; uSpeed = (unsigned)(cbSrc / (long double)NanoTS * 1000000000.0 / 1024); RTSha256ToString(abSha256Hash, szDigest, sizeof(szDigest)); RTPrintf("SHA-256 %'9u KB/s %'15llu ns - %s\n", uSpeed, NanoTS, szDigest); NanoTS = RTTimeNanoTS(); uint8_t abSha512Hash[RTSHA512_HASH_SIZE]; RTSha512(pabSrc, cbSrc, abSha512Hash); NanoTS = RTTimeNanoTS() - NanoTS; uSpeed = (unsigned)(cbSrc / (long double)NanoTS * 1000000000.0 / 1024); RTSha512ToString(abSha512Hash, szDigest, sizeof(szDigest)); RTPrintf("SHA-512 %'9u KB/s %'15llu ns - %s\n", uSpeed, NanoTS, szDigest); } /** * Benchmark RTCrc routines potentially relevant for SSM or PGM - Page by page. * * @param pabSrc Pointer to the test data. * @param cbSrc The size of the test data. */ static void tstBenchmarkCRCsPageByPage(uint8_t const *pabSrc, size_t cbSrc) { RTPrintf("Algorithm Speed Time \n" "----------------------------------------------\n"); size_t const cPages = cbSrc / PAGE_SIZE; uint64_t NanoTS = RTTimeNanoTS(); for (uint32_t iPage = 0; iPage < cPages; iPage++) RTCrc32(&pabSrc[iPage * PAGE_SIZE], PAGE_SIZE); NanoTS = RTTimeNanoTS() - NanoTS; unsigned uSpeed = (unsigned)(cbSrc / (long double)NanoTS * 1000000000.0 / 1024); RTPrintf("CRC-32 %'9u KB/s %'15llu ns\n", uSpeed, NanoTS); NanoTS = RTTimeNanoTS(); for (uint32_t iPage = 0; iPage < cPages; iPage++) RTCrc64(&pabSrc[iPage * PAGE_SIZE], PAGE_SIZE); NanoTS = RTTimeNanoTS() - NanoTS; uSpeed = (unsigned)(cbSrc / (long double)NanoTS * 1000000000.0 / 1024); RTPrintf("CRC-64 %'9u KB/s %'15llu ns\n", uSpeed, NanoTS); NanoTS = RTTimeNanoTS(); for (uint32_t iPage = 0; iPage < cPages; iPage++) RTCrcAdler32(&pabSrc[iPage * PAGE_SIZE], PAGE_SIZE); NanoTS = RTTimeNanoTS() - NanoTS; uSpeed = (unsigned)(cbSrc / (long double)NanoTS * 1000000000.0 / 1024); RTPrintf("Adler-32 %'9u KB/s %'15llu ns\n", uSpeed, NanoTS); NanoTS = RTTimeNanoTS(); uint8_t abMd5Hash[RTMD5HASHSIZE]; for (uint32_t iPage = 0; iPage < cPages; iPage++) RTMd5(&pabSrc[iPage * PAGE_SIZE], PAGE_SIZE, abMd5Hash); NanoTS = RTTimeNanoTS() - NanoTS; uSpeed = (unsigned)(cbSrc / (long double)NanoTS * 1000000000.0 / 1024); RTPrintf("MD5 %'9u KB/s %'15llu ns\n", uSpeed, NanoTS); NanoTS = RTTimeNanoTS(); uint8_t abSha1Hash[RTSHA1_HASH_SIZE]; for (uint32_t iPage = 0; iPage < cPages; iPage++) RTSha1(&pabSrc[iPage * PAGE_SIZE], PAGE_SIZE, abSha1Hash); NanoTS = RTTimeNanoTS() - NanoTS; uSpeed = (unsigned)(cbSrc / (long double)NanoTS * 1000000000.0 / 1024); RTPrintf("SHA-1 %'9u KB/s %'15llu ns\n", uSpeed, NanoTS); NanoTS = RTTimeNanoTS(); uint8_t abSha256Hash[RTSHA256_HASH_SIZE]; for (uint32_t iPage = 0; iPage < cPages; iPage++) RTSha256(&pabSrc[iPage * PAGE_SIZE], PAGE_SIZE, abSha256Hash); NanoTS = RTTimeNanoTS() - NanoTS; uSpeed = (unsigned)(cbSrc / (long double)NanoTS * 1000000000.0 / 1024); RTPrintf("SHA-256 %'9u KB/s %'15llu ns\n", uSpeed, NanoTS); NanoTS = RTTimeNanoTS(); uint8_t abSha512Hash[RTSHA512_HASH_SIZE]; for (uint32_t iPage = 0; iPage < cPages; iPage++) RTSha512(&pabSrc[iPage * PAGE_SIZE], PAGE_SIZE, abSha512Hash); NanoTS = RTTimeNanoTS() - NanoTS; uSpeed = (unsigned)(cbSrc / (long double)NanoTS * 1000000000.0 / 1024); RTPrintf("SHA-512 %'9u KB/s %'15llu ns\n", uSpeed, NanoTS); } /** Prints an error message and returns 1 for quick return from main use. */ static int Error(const char *pszMsgFmt, ...) { RTStrmPrintf(g_pStdErr, "\nerror: "); va_list va; va_start(va, pszMsgFmt); RTStrmPrintfV(g_pStdErr, pszMsgFmt, va); va_end(va); return 1; } int main(int argc, char **argv) { RTR3InitExe(argc, &argv, 0); /* * Parse arguments. */ static const RTGETOPTDEF s_aOptions[] = { { "--iterations", 'i', RTGETOPT_REQ_UINT32 }, { "--num-pages", 'n', RTGETOPT_REQ_UINT32 }, { "--page-at-a-time", 'c', RTGETOPT_REQ_UINT32 }, { "--page-file", 'f', RTGETOPT_REQ_STRING }, { "--offset", 'o', RTGETOPT_REQ_UINT64 }, }; const char *pszPageFile = NULL; uint64_t offPageFile = 0; uint32_t cIterations = 1; uint32_t cPagesAtATime = 1; RTGETOPTUNION Val; RTGETOPTSTATE State; int rc = RTGetOptInit(&State, argc, argv, &s_aOptions[0], RT_ELEMENTS(s_aOptions), 1, 0); AssertRCReturn(rc, 1); while ((rc = RTGetOpt(&State, &Val))) { switch (rc) { case 'n': g_cPages = Val.u32; if (g_cPages * PAGE_SIZE * 4 / (PAGE_SIZE * 4) != g_cPages) return Error("The specified page count is too high: %#x (%#llx bytes)\n", g_cPages, (uint64_t)g_cPages * PAGE_SHIFT); if (g_cPages < 1) return Error("The specified page count is too low: %#x\n", g_cPages); break; case 'i': cIterations = Val.u32; if (cIterations < 1) return Error("The number of iterations must be 1 or higher\n"); break; case 'c': cPagesAtATime = Val.u32; if (cPagesAtATime < 1 || cPagesAtATime > 10240) return Error("The specified pages-at-a-time count is out of range: %#x\n", cPagesAtATime); break; case 'f': pszPageFile = Val.psz; break; case 'o': offPageFile = Val.u64; break; case 'O': offPageFile = Val.u64 * PAGE_SIZE; break; case 'h': RTPrintf("syntax: tstCompressionBenchmark [options]\n" "\n" "Options:\n" " -h, --help\n" " Show this help page\n" " -i, --iterations \n" " The number of iterations.\n" " -n, --num-pages \n" " The number of pages.\n" " -c, --pages-at-a-time \n" " Number of pages at a time.\n" " -f, --page-file \n" " File or device to read the page from. The default\n" " is to generate some garbage.\n" " -o, --offset \n" " Offset into the page file to start reading at.\n"); return 0; case 'V': RTPrintf("%sr%s\n", RTBldCfgVersion(), RTBldCfgRevisionStr()); return 0; default: return RTGetOptPrintError(rc, &Val); } } g_cbPages = g_cPages * PAGE_SIZE; uint64_t cbTotal = (uint64_t)g_cPages * PAGE_SIZE * cIterations; uint64_t cbTotalKB = cbTotal / _1K; if (cbTotal / cIterations != g_cbPages) return Error("cPages * cIterations -> overflow\n"); /* * Gather the test memory. */ if (pszPageFile) { size_t cbFile; rc = RTFileReadAllEx(pszPageFile, offPageFile, g_cbPages, RTFILE_RDALL_O_DENY_NONE, (void **)&g_pabSrc, &cbFile); if (RT_FAILURE(rc)) return Error("Error reading %zu bytes from %s at %llu: %Rrc\n", g_cbPages, pszPageFile, offPageFile, rc); if (cbFile != g_cbPages) return Error("Error reading %zu bytes from %s at %llu: got %zu bytes\n", g_cbPages, pszPageFile, offPageFile, cbFile); } else { g_pabSrc = (uint8_t *)RTMemAlloc(g_cbPages); if (g_pabSrc) { /* Just fill it with something - warn about the low quality of the something. */ RTPrintf("tstCompressionBenchmark: WARNING! No input file was specified so the source\n" "buffer will be filled with generated data of questionable quality.\n"); #ifdef RT_OS_LINUX RTPrintf("To get real RAM on linux: sudo dd if=/dev/mem ... \n"); #endif uint8_t *pb = g_pabSrc; uint8_t *pbEnd = &g_pabSrc[g_cbPages]; for (; pb != pbEnd; pb += 16) { char szTmp[17]; RTStrPrintf(szTmp, sizeof(szTmp), "aaaa%08Xzzzz", (uint32_t)(uintptr_t)pb); memcpy(pb, szTmp, 16); } } } g_pabDecompr = (uint8_t *)RTMemAlloc(g_cbPages); g_cbComprAlloc = RT_MAX(g_cbPages * 2, 256 * PAGE_SIZE); g_pabCompr = (uint8_t *)RTMemAlloc(g_cbComprAlloc); if (!g_pabSrc || !g_pabDecompr || !g_pabCompr) return Error("failed to allocate memory buffers (g_cPages=%#x)\n", g_cPages); /* * Double loop compressing and uncompressing the data, where the outer does * the specified number of iterations while the inner applies the different * compression algorithms. */ struct { /** The time spent decompressing. */ uint64_t cNanoDecompr; /** The time spent compressing. */ uint64_t cNanoCompr; /** The size of the compressed data. */ uint64_t cbCompr; /** First error. */ int rc; /** The compression style: block or stream. */ bool fBlock; /** Compression type. */ RTZIPTYPE enmType; /** Compression level. */ RTZIPLEVEL enmLevel; /** Method name. */ const char *pszName; } aTests[] = { { 0, 0, 0, VINF_SUCCESS, false, RTZIPTYPE_STORE, RTZIPLEVEL_DEFAULT, "RTZip/Store" }, { 0, 0, 0, VINF_SUCCESS, false, RTZIPTYPE_LZF, RTZIPLEVEL_DEFAULT, "RTZip/LZF" }, /* { 0, 0, 0, VINF_SUCCESS, false, RTZIPTYPE_ZLIB, RTZIPLEVEL_DEFAULT, "RTZip/zlib" }, - slow plus it randomly hits VERR_GENERAL_FAILURE atm. */ { 0, 0, 0, VINF_SUCCESS, true, RTZIPTYPE_STORE, RTZIPLEVEL_DEFAULT, "RTZipBlock/Store" }, { 0, 0, 0, VINF_SUCCESS, true, RTZIPTYPE_LZF, RTZIPLEVEL_DEFAULT, "RTZipBlock/LZF" }, { 0, 0, 0, VINF_SUCCESS, true, RTZIPTYPE_LZJB, RTZIPLEVEL_DEFAULT, "RTZipBlock/LZJB" }, { 0, 0, 0, VINF_SUCCESS, true, RTZIPTYPE_LZO, RTZIPLEVEL_DEFAULT, "RTZipBlock/LZO" }, }; RTPrintf("tstCompressionBenchmark: TESTING.."); for (uint32_t i = 0; i < cIterations; i++) { for (uint32_t j = 0; j < RT_ELEMENTS(aTests); j++) { if (RT_FAILURE(aTests[j].rc)) continue; memset(g_pabCompr, 0xaa, g_cbComprAlloc); memset(g_pabDecompr, 0xcc, g_cbPages); g_cbCompr = 0; g_offComprIn = 0; RTPrintf("."); RTStrmFlush(g_pStdOut); /* * Compress it. */ uint64_t NanoTS = RTTimeNanoTS(); if (aTests[j].fBlock) { size_t cbLeft = g_cbComprAlloc; uint8_t const *pbSrcPage = g_pabSrc; uint8_t *pbDstPage = g_pabCompr; for (size_t iPage = 0; iPage < g_cPages; iPage += cPagesAtATime) { AssertBreakStmt(cbLeft > PAGE_SIZE * 4, aTests[j].rc = rc = VERR_BUFFER_OVERFLOW); uint32_t *pcb = (uint32_t *)pbDstPage; pbDstPage += sizeof(uint32_t); cbLeft -= sizeof(uint32_t); size_t cbSrc = RT_MIN(g_cPages - iPage, cPagesAtATime) * PAGE_SIZE; size_t cbDst; rc = RTZipBlockCompress(aTests[j].enmType, aTests[j].enmLevel, 0 /*fFlags*/, pbSrcPage, cbSrc, pbDstPage, cbLeft, &cbDst); if (RT_FAILURE(rc)) { Error("RTZipBlockCompress failed for '%s' (#%u): %Rrc\n", aTests[j].pszName, j, rc); aTests[j].rc = rc; break; } *pcb = (uint32_t)cbDst; cbLeft -= cbDst; pbDstPage += cbDst; pbSrcPage += cbSrc; } if (RT_FAILURE(rc)) continue; g_cbCompr = pbDstPage - g_pabCompr; } else { PRTZIPCOMP pZipComp; rc = RTZipCompCreate(&pZipComp, NULL, ComprOutCallback, aTests[j].enmType, aTests[j].enmLevel); if (RT_FAILURE(rc)) { Error("Failed to create the compressor for '%s' (#%u): %Rrc\n", aTests[j].pszName, j, rc); aTests[j].rc = rc; continue; } uint8_t const *pbSrcPage = g_pabSrc; for (size_t iPage = 0; iPage < g_cPages; iPage += cPagesAtATime) { size_t cb = RT_MIN(g_cPages - iPage, cPagesAtATime) * PAGE_SIZE; rc = RTZipCompress(pZipComp, pbSrcPage, cb); if (RT_FAILURE(rc)) { Error("RTZipCompress failed for '%s' (#%u): %Rrc\n", aTests[j].pszName, j, rc); aTests[j].rc = rc; break; } pbSrcPage += cb; } if (RT_FAILURE(rc)) continue; rc = RTZipCompFinish(pZipComp); if (RT_FAILURE(rc)) { Error("RTZipCompFinish failed for '%s' (#%u): %Rrc\n", aTests[j].pszName, j, rc); aTests[j].rc = rc; break; } RTZipCompDestroy(pZipComp); } NanoTS = RTTimeNanoTS() - NanoTS; aTests[j].cbCompr += g_cbCompr; aTests[j].cNanoCompr += NanoTS; /* * Decompress it. */ NanoTS = RTTimeNanoTS(); if (aTests[j].fBlock) { uint8_t const *pbSrcPage = g_pabCompr; size_t cbLeft = g_cbCompr; uint8_t *pbDstPage = g_pabDecompr; for (size_t iPage = 0; iPage < g_cPages; iPage += cPagesAtATime) { size_t cbDst = RT_MIN(g_cPages - iPage, cPagesAtATime) * PAGE_SIZE; size_t cbSrc = *(uint32_t *)pbSrcPage; pbSrcPage += sizeof(uint32_t); cbLeft -= sizeof(uint32_t); rc = RTZipBlockDecompress(aTests[j].enmType, 0 /*fFlags*/, pbSrcPage, cbSrc, &cbSrc, pbDstPage, cbDst, &cbDst); if (RT_FAILURE(rc)) { Error("RTZipBlockDecompress failed for '%s' (#%u): %Rrc\n", aTests[j].pszName, j, rc); aTests[j].rc = rc; break; } pbDstPage += cbDst; cbLeft -= cbSrc; pbSrcPage += cbSrc; } if (RT_FAILURE(rc)) continue; } else { PRTZIPDECOMP pZipDecomp; rc = RTZipDecompCreate(&pZipDecomp, NULL, DecomprInCallback); if (RT_FAILURE(rc)) { Error("Failed to create the decompressor for '%s' (#%u): %Rrc\n", aTests[j].pszName, j, rc); aTests[j].rc = rc; continue; } uint8_t *pbDstPage = g_pabDecompr; for (size_t iPage = 0; iPage < g_cPages; iPage += cPagesAtATime) { size_t cb = RT_MIN(g_cPages - iPage, cPagesAtATime) * PAGE_SIZE; rc = RTZipDecompress(pZipDecomp, pbDstPage, cb, NULL); if (RT_FAILURE(rc)) { Error("RTZipDecompress failed for '%s' (#%u): %Rrc\n", aTests[j].pszName, j, rc); aTests[j].rc = rc; break; } pbDstPage += cb; } RTZipDecompDestroy(pZipDecomp); if (RT_FAILURE(rc)) continue; } NanoTS = RTTimeNanoTS() - NanoTS; aTests[j].cNanoDecompr += NanoTS; if (memcmp(g_pabDecompr, g_pabSrc, g_cbPages)) { Error("The compressed data doesn't match the source for '%s' (%#u)\n", aTests[j].pszName, j); aTests[j].rc = VERR_BAD_EXE_FORMAT; continue; } } } if (RT_SUCCESS(rc)) RTPrintf("\n"); /* * Report the results. */ rc = 0; RTPrintf("tstCompressionBenchmark: BEGIN RESULTS\n"); RTPrintf("%-20s Compression Decompression\n", ""); RTPrintf("%-20s In Out Ratio Size In Out\n", "Method"); RTPrintf("%.20s-----------------------------------------------------------------------------------------\n", "---------------------------------------------"); for (uint32_t j = 0; j < RT_ELEMENTS(aTests); j++) { if (RT_SUCCESS(aTests[j].rc)) { unsigned uComprSpeedIn = (unsigned)(cbTotalKB / (long double)aTests[j].cNanoCompr * 1000000000.0); unsigned uComprSpeedOut = (unsigned)(aTests[j].cbCompr / (long double)aTests[j].cNanoCompr * 1000000000.0 / 1024); unsigned uRatio = (unsigned)(aTests[j].cbCompr / cIterations * 100 / g_cbPages); unsigned uDecomprSpeedIn = (unsigned)(aTests[j].cbCompr / (long double)aTests[j].cNanoDecompr * 1000000000.0 / 1024); unsigned uDecomprSpeedOut = (unsigned)(cbTotalKB / (long double)aTests[j].cNanoDecompr * 1000000000.0); RTPrintf("%-20s %'9u KB/s %'9u KB/s %3u%% %'11llu bytes %'9u KB/s %'9u KB/s", aTests[j].pszName, uComprSpeedIn, uComprSpeedOut, uRatio, aTests[j].cbCompr / cIterations, uDecomprSpeedIn, uDecomprSpeedOut); #if 0 RTPrintf(" [%'14llu / %'14llu ns]\n", aTests[j].cNanoCompr / cIterations, aTests[j].cNanoDecompr / cIterations); #else RTPrintf("\n"); #endif } else { RTPrintf("%-20s: %Rrc\n", aTests[j].pszName, aTests[j].rc); rc = 1; } } if (pszPageFile) RTPrintf("Input: %'10zu pages from '%s' starting at offset %'lld (%#llx)\n" " %'11zu bytes\n", g_cPages, pszPageFile, offPageFile, offPageFile, g_cbPages); else RTPrintf("Input: %'10zu pages of generated rubbish %'11zu bytes\n", g_cPages, g_cbPages); /* * Count zero pages in the data set. */ size_t cZeroPages = 0; for (size_t iPage = 0; iPage < g_cPages; iPage++) { if (!ASMMemIsAllU32(&g_pabSrc[iPage * PAGE_SIZE], PAGE_SIZE, 0)) cZeroPages++; } RTPrintf(" %'10zu zero pages (%u %%)\n", cZeroPages, cZeroPages * 100 / g_cPages); /* * A little extension to the test, benchmark relevant CRCs. */ RTPrintf("\n" "tstCompressionBenchmark: Hash/CRC - All In One\n"); tstBenchmarkCRCsAllInOne(g_pabSrc, g_cbPages); RTPrintf("\n" "tstCompressionBenchmark: Hash/CRC - Page by Page\n"); tstBenchmarkCRCsPageByPage(g_pabSrc, g_cbPages); RTPrintf("\n" "tstCompressionBenchmark: Hash/CRC - Zero Page Digest\n"); static uint8_t s_abZeroPg[PAGE_SIZE]; RT_ZERO(s_abZeroPg); tstBenchmarkCRCsAllInOne(s_abZeroPg, PAGE_SIZE); RTPrintf("\n" "tstCompressionBenchmark: Hash/CRC - Zero Half Page Digest\n"); tstBenchmarkCRCsAllInOne(s_abZeroPg, PAGE_SIZE / 2); RTPrintf("tstCompressionBenchmark: END RESULTS\n"); return rc; }