SQLite: Artifact [6e022840]

<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <base href="https://www.sqlite.org/src/doc/6937986a/test/kvtest.c"> <meta http-equiv="Content-Security-Policy" content="default-src 'self' data:; script-src 'self' 'nonce-63ab1b7962a683f77e79639b015c2da8563164c3c2252deb'; style-src 'self' 'unsafe-inline'; img-src * data:"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>SQLite: Artifact [6e022840]</title> <link rel="alternate" type="application/rss+xml" title="RSS Feed" href="/src/timeline.rss"> <link rel="stylesheet" href="/src/style.css?id=b1928be2" type="text/css"> </head> <body class="artifact rpage-artifact cpage-artifact"> <header> <div class="title"><h1>SQLite</h1>Artifact [6e022840]</div> <div class="status"> <a href='/src/login'>Login</a> </div> </header> <nav class="mainmenu" title="Main Menu"> <a id='hbbtn' href='/src/sitemap' aria-label='Site Map'>☰</a><a href='https://sqlite.org/' class=''>Home</a> <a href='/src/timeline' class=''>Timeline</a> <a href='/src/dir?ci=trunk' class='desktoponly'>Files</a> <a href='https://sqlite.org/forum/forum' class='desktoponly'>Forum</a> </nav> <nav id="hbdrop" class='hbdrop' title="sitemap"></nav> <form id='f01' method='GET' action='/src/artifact'> <input type='hidden' name='udc' value='1'> <div class="submenu"> <a class="label sml-check-ins-using" href="/src/timeline?uf=6e0228409ea7ca0497dad503fbd109badb5e59545d131014b6aaac68b56f484a">Check-ins Using</a> <a class="label sml-download" href="/src/raw/6e0228409ea7ca0497dad503fbd109badb5e59545d131014b6aaac68b56f484a?at=6e022840">Download</a> <a class="label sml-hex" href="/src/hexdump?name=6e0228409ea7ca0497dad503fbd109badb5e59545d131014b6aaac68b56f484a">Hex</a> <label class='submenuctrl submenuckbox smc-ln'><input type='checkbox' name='ln' id='submenuctrl-0' >Line Numbers</label> </div> <input type="hidden" name="name" value="6e022840"> </form> <div class="content"><span id="debugMsg"></span> <h2>Artifact <span class="nobr"><span class="copy-button" id="copy-hash-ar" data-copytarget="hash-ar" data-copylength="16"></span><span id="hash-ar">6e0228409ea7ca0497dad503fbd109badb5e59545d131014b6aaac68b56f484a</span></span>:</h2> <ul> <li>File <a data-href='/src/finfo?name=test/kvtest.c&ci=6937986a687e4afe&m=6e0228409ea7ca04' href='/src/honeypot'>test/kvtest.c</a> — part of check-in <a class='timelineHistLink' data-href='/src/info/6937986a687e4afe' href='/src/honeypot'>[6937986a]</a> at <a data-href='/src/timeline?c=2023-06-15+15:43:08' href='/src/honeypot'>2023-06-15 15:43:08</a> on branch <a data-href='/src/timeline?r=trunk' href='/src/honeypot'>trunk</a> — Fix harmless typo in a comment. (user: <a data-href='/src/timeline?c=2023-06-15+15:43:08&u=drh&y=a' href='/src/honeypot'>drh</a>, size: 35993) <a data-href='/src/annotate?filename=test/kvtest.c&checkin=6937986a687e4afe' href='/src/honeypot'> [annotate]</a> <a data-href='/src/blame?filename=test/kvtest.c&checkin=6937986a687e4afe' href='/src/honeypot'> [blame]</a> <a data-href='/src/timeline?uf=6e0228409ea7ca04' href='/src/honeypot'>[check-ins using]</a> <a data-href='/src/whatis/6e0228409ea7ca04' href='/src/honeypot'>[more...]</a> </ul> <hr> <blockquote class="file-content"> <pre> <code class="language-c">/* ** 2016-12-28 ** ** The author disclaims copyright to this source code. In place of ** a legal notice, here is a blessing: ** ** May you do good and not evil. ** May you find forgiveness for yourself and forgive others. ** May you share freely, never taking more than you give. ** ************************************************************************* ** ** This file implements "key-value" performance test for SQLite. The ** purpose is to compare the speed of SQLite for accessing large BLOBs ** versus reading those same BLOB values out of individual files in the ** filesystem. ** ** Run "kvtest" with no arguments for on-line help, or see comments below. ** ** HOW TO COMPILE: ** ** (1) Gather this source file and a recent SQLite3 amalgamation with its ** header into the working directory. You should have: ** ** kvtest.c >--- this file ** sqlite3.c \___ SQLite ** sqlite3.h / amlagamation & header ** ** (2) Run you compiler against the two C source code files. ** ** (a) On linux or mac: ** ** OPTS="-DSQLITE_THREADSAFE=0 -DSQLITE_OMIT_LOAD_EXTENSION" ** gcc -Os -I. $OPTS kvtest.c sqlite3.c -o kvtest ** ** The $OPTS options can be omitted. The $OPTS merely omit ** the need to link against -ldl and -lpthread, or whatever ** the equivalent libraries are called on your system. ** ** (b) Windows with MSVC: ** ** cl -I. kvtest.c sqlite3.c ** ** USAGE: ** ** (1) Create a test database by running "kvtest init" with appropriate ** options. See the help message for available options. ** ** (2) Construct the corresponding pile-of-files database on disk using ** the "kvtest export" command. ** ** (3) Run tests using "kvtest run" against either the SQLite database or ** the pile-of-files database and with appropriate options. ** ** For example: ** ** ./kvtest init x1.db --count 100000 --size 10000 ** mkdir x1 ** ./kvtest export x1.db x1 ** ./kvtest run x1.db --count 10000 --max-id 1000000 ** ./kvtest run x1 --count 10000 --max-id 1000000 */ static const char zHelp[] = "Usage: kvtest COMMAND ARGS...\n" "\n" " kvtest init DBFILE --count N --size M --pagesize X\n" "\n" " Generate a new test database file named DBFILE containing N\n" " BLOBs each of size M bytes. The page size of the new database\n" " file will be X. Additional options:\n" "\n" " --variance V Randomly vary M by plus or minus V\n" "\n" " kvtest export DBFILE DIRECTORY [--tree]\n" "\n" " Export all the blobs in the kv table of DBFILE into separate\n" " files in DIRECTORY. DIRECTORY is created if it does not previously\n" " exist. If the --tree option is used, then the blobs are written\n" " into a hierarchy of directories, using names like 00/00/00,\n" " 00/00/01, 00/00/02, and so forth. Without the --tree option, all\n" " files are in the top-level directory with names like 000000, 000001,\n" " 000002, and so forth.\n" "\n" " kvtest stat DBFILE [options]\n" "\n" " Display summary information about DBFILE. Options:\n" "\n" " --vacuum Run VACUUM on the database file\n" "\n" " kvtest run DBFILE [options]\n" "\n" " Run a performance test. DBFILE can be either the name of a\n" " database or a directory containing sample files. Options:\n" "\n" " --asc Read blobs in ascending order\n" " --blob-api Use the BLOB API\n" " --cache-size N Database cache size\n" " --count N Read N blobs\n" " --desc Read blobs in descending order\n" " --fsync Synchronous file writes\n" " --integrity-check Run \"PRAGMA integrity_check\" after test\n" " --max-id N Maximum blob key to use\n" " --mmap N Mmap as much as N bytes of DBFILE\n" " --multitrans Each read or write in its own transaction\n" " --nocheckpoint Omit the checkpoint on WAL mode writes\n" " --nosync Set \"PRAGMA synchronous=OFF\"\n" " --jmode MODE Set MODE journal mode prior to starting\n" " --random Read blobs in a random order\n" " --start N Start reading with this blob key\n" " --stats Output operating stats before exiting\n" " --update Do an overwrite test\n" ; /* Reference resources used */ #include <stdio.h> #include <stdlib.h> #include <sys/types.h> #include <sys/stat.h> #include <assert.h> #include <string.h> #include "sqlite3.h" #ifndef _WIN32 # include <unistd.h> #else /* Provide Windows equivalent for the needed parts of unistd.h */ # include <direct.h> # include <io.h> # define R_OK 2 # define S_ISREG(m) (((m) & S_IFMT) == S_IFREG) # define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR) # define access _access #endif #if !defined(_MSC_VER) # include <stdint.h> #endif /* ** The following macros are used to cast pointers to integers and ** integers to pointers. The way you do this varies from one compiler ** to the next, so we have developed the following set of #if statements ** to generate appropriate macros for a wide range of compilers. ** ** The correct "ANSI" way to do this is to use the intptr_t type. ** Unfortunately, that typedef is not available on all compilers, or ** if it is available, it requires an #include of specific headers ** that vary from one machine to the next. ** ** Ticket #3860: The llvm-gcc-4.2 compiler from Apple chokes on ** the ((void*)&((char*)0)[X]) construct. But MSVC chokes on ((void*)(X)). ** So we have to define the macros in different ways depending on the ** compiler. */ #if defined(__PTRDIFF_TYPE__) /* This case should work for GCC */ # define SQLITE_INT_TO_PTR(X) ((void*)(__PTRDIFF_TYPE__)(X)) # define SQLITE_PTR_TO_INT(X) ((sqlite3_int64)(__PTRDIFF_TYPE__)(X)) #else # define SQLITE_INT_TO_PTR(X) ((void*)(intptr_t)(X)) # define SQLITE_PTR_TO_INT(X) ((sqlite3_int64)(intptr_t)(X)) #endif /* ** Show the help text and quit. */ static void showHelp(void){ fprintf(stdout, "%s", zHelp); exit(1); } /* ** Show an error message an quit. */ static void fatalError(const char *zFormat, ...){ va_list ap; fprintf(stdout, "ERROR: "); va_start(ap, zFormat); vfprintf(stdout, zFormat, ap); va_end(ap); fprintf(stdout, "\n"); exit(1); } /* ** Return the value of a hexadecimal digit. Return -1 if the input ** is not a hex digit. */ static int hexDigitValue(char c){ if( c>='0' && c<='9' ) return c - '0'; if( c>='a' && c<='f' ) return c - 'a' + 10; if( c>='A' && c<='F' ) return c - 'A' + 10; return -1; } /* ** Interpret zArg as an integer value, possibly with suffixes. */ static int integerValue(const char *zArg){ int v = 0; static const struct { char *zSuffix; int iMult; } aMult[] = { { "KiB", 1024 }, { "MiB", 1024*1024 }, { "GiB", 1024*1024*1024 }, { "KB", 1000 }, { "MB", 1000000 }, { "GB", 1000000000 }, { "K", 1000 }, { "M", 1000000 }, { "G", 1000000000 }, }; int i; int isNeg = 0; if( zArg[0]=='-' ){ isNeg = 1; zArg++; }else if( zArg[0]=='+' ){ zArg++; } if( zArg[0]=='0' && zArg[1]=='x' ){ int x; zArg += 2; while( (x = hexDigitValue(zArg[0]))>=0 ){ v = (v<<4) + x; zArg++; } }else{ while( zArg[0]>='0' && zArg[0]<='9' ){ v = v*10 + zArg[0] - '0'; zArg++; } } for(i=0; i<sizeof(aMult)/sizeof(aMult[0]); i++){ if( sqlite3_stricmp(aMult[i].zSuffix, zArg)==0 ){ v *= aMult[i].iMult; break; } } return isNeg? -v : v; } /* ** Check the filesystem object zPath. Determine what it is: ** ** PATH_DIR A single directory holding many files ** PATH_TREE A directory hierarchy with files at the leaves ** PATH_DB An SQLite database ** PATH_NEXIST Does not exist ** PATH_OTHER Something else ** ** PATH_DIR means all of the separate files are grouped together ** into a single directory with names like 000000, 000001, 000002, and ** so forth. PATH_TREE means there is a hierarchy of directories so ** that no single directory has too many entries. The files have names ** like 00/00/00, 00/00/01, 00/00/02 and so forth. The decision between ** PATH_DIR and PATH_TREE is determined by the presence of a subdirectory ** named "00" at the top-level. */ #define PATH_DIR 1 #define PATH_TREE 2 #define PATH_DB 3 #define PATH_NEXIST 0 #define PATH_OTHER 99 static int pathType(const char *zPath){ struct stat x; int rc; if( access(zPath,R_OK) ) return PATH_NEXIST; memset(&x, 0, sizeof(x)); rc = stat(zPath, &x); if( rc<0 ) return PATH_OTHER; if( S_ISDIR(x.st_mode) ){ char *zLayer1 = sqlite3_mprintf("%s/00", zPath); memset(&x, 0, sizeof(x)); rc = stat(zLayer1, &x); sqlite3_free(zLayer1); if( rc<0 ) return PATH_DIR; if( S_ISDIR(x.st_mode) ) return PATH_TREE; return PATH_DIR; } if( (x.st_size%512)==0 ) return PATH_DB; return PATH_OTHER; } /* ** Return the size of a file in bytes. Or return -1 if the ** named object is not a regular file or does not exist. */ static sqlite3_int64 fileSize(const char *zPath){ struct stat x; int rc; memset(&x, 0, sizeof(x)); rc = stat(zPath, &x); if( rc<0 ) return -1; if( !S_ISREG(x.st_mode) ) return -1; return x.st_size; } /* ** A Pseudo-random number generator with a fixed seed. Use this so ** that the same sequence of "random" numbers are generated on each ** run, for repeatability. */ static unsigned int randInt(void){ static unsigned int x = 0x333a13cd; static unsigned int y = 0xecb2adea; x = (x>>1) ^ ((1+~(x&1)) & 0xd0000001); y = y*1103515245 + 12345; return x^y; } /* ** Do database initialization. */ static int initMain(int argc, char **argv){ char *zDb; int i, rc; int nCount = 1000; int sz = 10000; int iVariance = 0; int pgsz = 4096; sqlite3 *db; char *zSql; char *zErrMsg = 0; assert( strcmp(argv[1],"init")==0 ); assert( argc>=3 ); zDb = argv[2]; for(i=3; i<argc; i++){ char *z = argv[i]; if( z[0]!='-' ) fatalError("unknown argument: \"%s\"", z); if( z[1]=='-' ) z++; if( strcmp(z, "-count")==0 ){ if( i==argc-1 ) fatalError("missing argument on \"%s\"", argv[i]); nCount = integerValue(argv[++i]); if( nCount<1 ) fatalError("the --count must be positive"); continue; } if( strcmp(z, "-size")==0 ){ if( i==argc-1 ) fatalError("missing argument on \"%s\"", argv[i]); sz = integerValue(argv[++i]); if( sz<1 ) fatalError("the --size must be positive"); continue; } if( strcmp(z, "-variance")==0 ){ if( i==argc-1 ) fatalError("missing argument on \"%s\"", argv[i]); iVariance = integerValue(argv[++i]); continue; } if( strcmp(z, "-pagesize")==0 ){ if( i==argc-1 ) fatalError("missing argument on \"%s\"", argv[i]); pgsz = integerValue(argv[++i]); if( pgsz<512 || pgsz>65536 || ((pgsz-1)&pgsz)!=0 ){ fatalError("the --pagesize must be power of 2 between 512 and 65536"); } continue; } fatalError("unknown option: \"%s\"", argv[i]); } rc = sqlite3_open(zDb, &db); if( rc ){ fatalError("cannot open database \"%s\": %s", zDb, sqlite3_errmsg(db)); } zSql = sqlite3_mprintf( "DROP TABLE IF EXISTS kv;\n" "PRAGMA page_size=%d;\n" "VACUUM;\n" "BEGIN;\n" "CREATE TABLE kv(k INTEGER PRIMARY KEY, v BLOB);\n" "WITH RECURSIVE c(x) AS (VALUES(1) UNION ALL SELECT x+1 FROM c WHERE x<%d)" " INSERT INTO kv(k,v) SELECT x, randomblob(%d+(random()%%(%d))) FROM c;\n" "COMMIT;\n", pgsz, nCount, sz, iVariance+1 ); rc = sqlite3_exec(db, zSql, 0, 0, &zErrMsg); if( rc ) fatalError("database create failed: %s", zErrMsg); sqlite3_free(zSql); sqlite3_close(db); return 0; } /* ** Analyze an existing database file. Report its content. */ static int statMain(int argc, char **argv){ char *zDb; int i, rc; sqlite3 *db; char *zSql; sqlite3_stmt *pStmt; int doVacuum = 0; assert( strcmp(argv[1],"stat")==0 ); assert( argc>=3 ); zDb = argv[2]; for(i=3; i<argc; i++){ char *z = argv[i]; if( z[0]!='-' ) fatalError("unknown argument: \"%s\"", z); if( z[1]=='-' ) z++; if( strcmp(z, "-vacuum")==0 ){ doVacuum = 1; continue; } fatalError("unknown option: \"%s\"", argv[i]); } rc = sqlite3_open(zDb, &db); if( rc ){ fatalError("cannot open database \"%s\": %s", zDb, sqlite3_errmsg(db)); } if( doVacuum ){ printf("Vacuuming...."); fflush(stdout); sqlite3_exec(db, "VACUUM", 0, 0, 0); printf(" done\n"); } zSql = sqlite3_mprintf( "SELECT count(*), min(length(v)), max(length(v)), avg(length(v))" " FROM kv" ); rc = sqlite3_prepare_v2(db, zSql, -1, &pStmt, 0); if( rc ) fatalError("cannot prepare SQL [%s]: %s", zSql, sqlite3_errmsg(db)); sqlite3_free(zSql); if( sqlite3_step(pStmt)==SQLITE_ROW ){ printf("Number of entries: %8d\n", sqlite3_column_int(pStmt, 0)); printf("Average value size: %8d\n", sqlite3_column_int(pStmt, 3)); printf("Minimum value size: %8d\n", sqlite3_column_int(pStmt, 1)); printf("Maximum value size: %8d\n", sqlite3_column_int(pStmt, 2)); }else{ printf("No rows\n"); } sqlite3_finalize(pStmt); zSql = sqlite3_mprintf("PRAGMA page_size"); rc = sqlite3_prepare_v2(db, zSql, -1, &pStmt, 0); if( rc ) fatalError("cannot prepare SQL [%s]: %s", zSql, sqlite3_errmsg(db)); sqlite3_free(zSql); if( sqlite3_step(pStmt)==SQLITE_ROW ){ printf("Page-size: %8d\n", sqlite3_column_int(pStmt, 0)); } sqlite3_finalize(pStmt); zSql = sqlite3_mprintf("PRAGMA page_count"); rc = sqlite3_prepare_v2(db, zSql, -1, &pStmt, 0); if( rc ) fatalError("cannot prepare SQL [%s]: %s", zSql, sqlite3_errmsg(db)); sqlite3_free(zSql); if( sqlite3_step(pStmt)==SQLITE_ROW ){ printf("Page-count: %8d\n", sqlite3_column_int(pStmt, 0)); } sqlite3_finalize(pStmt); zSql = sqlite3_mprintf("PRAGMA freelist_count"); rc = sqlite3_prepare_v2(db, zSql, -1, &pStmt, 0); if( rc ) fatalError("cannot prepare SQL [%s]: %s", zSql, sqlite3_errmsg(db)); sqlite3_free(zSql); if( sqlite3_step(pStmt)==SQLITE_ROW ){ printf("Freelist-count: %8d\n", sqlite3_column_int(pStmt, 0)); } sqlite3_finalize(pStmt); rc = sqlite3_prepare_v2(db, "PRAGMA integrity_check(10)", -1, &pStmt, 0); if( rc ) fatalError("cannot prepare integrity check: %s", sqlite3_errmsg(db)); while( sqlite3_step(pStmt)==SQLITE_ROW ){ printf("Integrity-check: %s\n", sqlite3_column_text(pStmt, 0)); } sqlite3_finalize(pStmt); sqlite3_close(db); return 0; } /* ** remember(V,PTR) ** ** Return the integer value V. Also save the value of V in a ** C-language variable whose address is PTR. */ static void rememberFunc( sqlite3_context *pCtx, int argc, sqlite3_value **argv ){ sqlite3_int64 v; sqlite3_int64 ptr; assert( argc==2 ); v = sqlite3_value_int64(argv[0]); ptr = sqlite3_value_int64(argv[1]); *(sqlite3_int64*)SQLITE_INT_TO_PTR(ptr) = v; sqlite3_result_int64(pCtx, v); } /* ** Make sure a directory named zDir exists. */ static void kvtest_mkdir(const char *zDir){ #if defined(_WIN32) (void)mkdir(zDir); #else (void)mkdir(zDir, 0755); #endif } /* ** Export the kv table to individual files in the filesystem */ static int exportMain(int argc, char **argv){ char *zDb; char *zDir; sqlite3 *db; sqlite3_stmt *pStmt; int rc; int ePathType; int nFN; char *zFN; char *zTail; size_t nWrote; int i; assert( strcmp(argv[1],"export")==0 ); assert( argc>=3 ); if( argc<4 ) fatalError("Usage: kvtest export DATABASE DIRECTORY [OPTIONS]"); zDb = argv[2]; zDir = argv[3]; kvtest_mkdir(zDir); for(i=4; i<argc; i++){ const char *z = argv[i]; if( z[0]=='-' && z[1]=='-' ) z++; if( strcmp(z,"-tree")==0 ){ zFN = sqlite3_mprintf("%s/00", zDir); kvtest_mkdir(zFN); sqlite3_free(zFN); continue; } fatalError("unknown argument: \"%s\"\n", argv[i]); } ePathType = pathType(zDir); if( ePathType!=PATH_DIR && ePathType!=PATH_TREE ){ fatalError("object \"%s\" is not a directory", zDir); } rc = sqlite3_open(zDb, &db); if( rc ){ fatalError("cannot open database \"%s\": %s", zDb, sqlite3_errmsg(db)); } rc = sqlite3_prepare_v2(db, "SELECT k, v FROM kv ORDER BY k", -1, &pStmt, 0); if( rc ){ fatalError("prepare_v2 failed: %s\n", sqlite3_errmsg(db)); } nFN = (int)strlen(zDir); zFN = sqlite3_mprintf("%s/00/00/00.extra---------------------", zDir); if( zFN==0 ){ fatalError("malloc failed\n"); } zTail = zFN + nFN + 1; while( sqlite3_step(pStmt)==SQLITE_ROW ){ int iKey = sqlite3_column_int(pStmt, 0); sqlite3_int64 nData = sqlite3_column_bytes(pStmt, 1); const void *pData = sqlite3_column_blob(pStmt, 1); FILE *out; if( ePathType==PATH_DIR ){ sqlite3_snprintf(20, zTail, "%06d", iKey); }else{ sqlite3_snprintf(20, zTail, "%02d", iKey/10000); kvtest_mkdir(zFN); sqlite3_snprintf(20, zTail, "%02d/%02d", iKey/10000, (iKey/100)%100); kvtest_mkdir(zFN); sqlite3_snprintf(20, zTail, "%02d/%02d/%02d", iKey/10000, (iKey/100)%100, iKey%100); } out = fopen(zFN, "wb"); nWrote = fwrite(pData, 1, (size_t)nData, out); fclose(out); printf("\r%s ", zTail); fflush(stdout); if( nWrote!=(size_t)nData ){ fatalError("Wrote only %d of %d bytes to %s\n", (int)nWrote, nData, zFN); } } sqlite3_finalize(pStmt); sqlite3_close(db); sqlite3_free(zFN); printf("\n"); return 0; } /* ** Read the content of file zName into memory obtained from sqlite3_malloc64() ** and return a pointer to the buffer. The caller is responsible for freeing ** the memory. ** ** If parameter pnByte is not NULL, (*pnByte) is set to the number of bytes ** read. ** ** For convenience, a nul-terminator byte is always appended to the data read ** from the file before the buffer is returned. This byte is not included in ** the final value of (*pnByte), if applicable. ** ** NULL is returned if any error is encountered. The final value of *pnByte ** is undefined in this case. */ static unsigned char *readFile(const char *zName, sqlite3_int64 *pnByte){ FILE *in; /* FILE from which to read content of zName */ sqlite3_int64 nIn; /* Size of zName in bytes */ size_t nRead; /* Number of bytes actually read */ unsigned char *pBuf; /* Content read from disk */ nIn = fileSize(zName); if( nIn<0 ) return 0; in = fopen(zName, "rb"); if( in==0 ) return 0; pBuf = sqlite3_malloc64( nIn ); if( pBuf==0 ) return 0; nRead = fread(pBuf, (size_t)nIn, 1, in); fclose(in); if( nRead!=1 ){ sqlite3_free(pBuf); return 0; } if( pnByte ) *pnByte = nIn; return pBuf; } /* ** Overwrite a file with randomness. Do not change the size of the ** file. */ static void updateFile(const char *zName, sqlite3_int64 *pnByte, int doFsync){ FILE *out; /* FILE from which to read content of zName */ sqlite3_int64 sz; /* Size of zName in bytes */ size_t nWritten; /* Number of bytes actually read */ unsigned char *pBuf; /* Content to store on disk */ const char *zMode = "wb"; /* Mode for fopen() */ sz = fileSize(zName); if( sz<0 ){ fatalError("No such file: \"%s\"", zName); } *pnByte = sz; if( sz==0 ) return; pBuf = sqlite3_malloc64( sz ); if( pBuf==0 ){ fatalError("Cannot allocate %lld bytes\n", sz); } sqlite3_randomness((int)sz, pBuf); #if defined(_WIN32) if( doFsync ) zMode = "wbc"; #endif out = fopen(zName, zMode); if( out==0 ){ fatalError("Cannot open \"%s\" for writing\n", zName); } nWritten = fwrite(pBuf, 1, (size_t)sz, out); if( doFsync ){ #if defined(_WIN32) fflush(out); #else fsync(fileno(out)); #endif } fclose(out); if( nWritten!=(size_t)sz ){ fatalError("Wrote only %d of %d bytes to \"%s\"\n", (int)nWritten, (int)sz, zName); } sqlite3_free(pBuf); } /* ** Return the current time in milliseconds since the beginning of ** the Julian epoch. */ static sqlite3_int64 timeOfDay(void){ static sqlite3_vfs *clockVfs = 0; sqlite3_int64 t; if( clockVfs==0 ) clockVfs = sqlite3_vfs_find(0); if( clockVfs->iVersion>=2 && clockVfs->xCurrentTimeInt64!=0 ){ clockVfs->xCurrentTimeInt64(clockVfs, &t); }else{ double r; clockVfs->xCurrentTime(clockVfs, &r); t = (sqlite3_int64)(r*86400000.0); } return t; } #ifdef __linux__ /* ** Attempt to display I/O stats on Linux using /proc/PID/io */ static void displayLinuxIoStats(FILE *out){ FILE *in; char z[200]; sqlite3_snprintf(sizeof(z), z, "/proc/%d/io", getpid()); in = fopen(z, "rb"); if( in==0 ) return; while( fgets(z, sizeof(z), in)!=0 ){ static const struct { const char *zPattern; const char *zDesc; } aTrans[] = { { "rchar: ", "Bytes received by read():" }, { "wchar: ", "Bytes sent to write():" }, { "syscr: ", "Read() system calls:" }, { "syscw: ", "Write() system calls:" }, { "read_bytes: ", "Bytes read from storage:" }, { "write_bytes: ", "Bytes written to storage:" }, { "cancelled_write_bytes: ", "Cancelled write bytes:" }, }; int i; for(i=0; i<sizeof(aTrans)/sizeof(aTrans[0]); i++){ int n = (int)strlen(aTrans[i].zPattern); if( strncmp(aTrans[i].zPattern, z, n)==0 ){ fprintf(out, "%-36s %s", aTrans[i].zDesc, &z[n]); break; } } } fclose(in); } #endif /* ** Display memory stats. */ static int display_stats( sqlite3 *db, /* Database to query */ int bReset /* True to reset SQLite stats */ ){ int iCur; int iHiwtr; FILE *out = stdout; fprintf(out, "\n"); iHiwtr = iCur = -1; sqlite3_status(SQLITE_STATUS_MEMORY_USED, &iCur, &iHiwtr, bReset); fprintf(out, "Memory Used: %d (max %d) bytes\n", iCur, iHiwtr); iHiwtr = iCur = -1; sqlite3_status(SQLITE_STATUS_MALLOC_COUNT, &iCur, &iHiwtr, bReset); fprintf(out, "Number of Outstanding Allocations: %d (max %d)\n", iCur, iHiwtr); iHiwtr = iCur = -1; sqlite3_status(SQLITE_STATUS_PAGECACHE_USED, &iCur, &iHiwtr, bReset); fprintf(out, "Number of Pcache Pages Used: %d (max %d) pages\n", iCur, iHiwtr); iHiwtr = iCur = -1; sqlite3_status(SQLITE_STATUS_PAGECACHE_OVERFLOW, &iCur, &iHiwtr, bReset); fprintf(out, "Number of Pcache Overflow Bytes: %d (max %d) bytes\n", iCur, iHiwtr); iHiwtr = iCur = -1; sqlite3_status(SQLITE_STATUS_MALLOC_SIZE, &iCur, &iHiwtr, bReset); fprintf(out, "Largest Allocation: %d bytes\n", iHiwtr); iHiwtr = iCur = -1; sqlite3_status(SQLITE_STATUS_PAGECACHE_SIZE, &iCur, &iHiwtr, bReset); fprintf(out, "Largest Pcache Allocation: %d bytes\n", iHiwtr); iHiwtr = iCur = -1; sqlite3_db_status(db, SQLITE_DBSTATUS_CACHE_USED, &iCur, &iHiwtr, bReset); fprintf(out, "Pager Heap Usage: %d bytes\n", iCur); iHiwtr = iCur = -1; sqlite3_db_status(db, SQLITE_DBSTATUS_CACHE_HIT, &iCur, &iHiwtr, 1); fprintf(out, "Page cache hits: %d\n", iCur); iHiwtr = iCur = -1; sqlite3_db_status(db, SQLITE_DBSTATUS_CACHE_MISS, &iCur, &iHiwtr, 1); fprintf(out, "Page cache misses: %d\n", iCur); iHiwtr = iCur = -1; sqlite3_db_status(db, SQLITE_DBSTATUS_CACHE_WRITE, &iCur, &iHiwtr, 1); fprintf(out, "Page cache writes: %d\n", iCur); iHiwtr = iCur = -1; #ifdef __linux__ displayLinuxIoStats(out); #endif return 0; } /* Blob access order */ #define ORDER_ASC 1 #define ORDER_DESC 2 #define ORDER_RANDOM 3 /* ** Run a performance test */ static int runMain(int argc, char **argv){ int eType; /* Is zDb a database or a directory? */ char *zDb; /* Database or directory name */ int i; /* Loop counter */ int rc; /* Return code from SQLite calls */ int nCount = 1000; /* Number of blob fetch operations */ int nExtra = 0; /* Extra cycles */ int iKey = 1; /* Next blob key */ int iMax = 0; /* Largest allowed key */ int iPagesize = 0; /* Database page size */ int iCache = 1000; /* Database cache size in kibibytes */ int bBlobApi = 0; /* Use the incremental blob I/O API */ int bStats = 0; /* Print stats before exiting */ int eOrder = ORDER_ASC; /* Access order */ int isUpdateTest = 0; /* Do in-place updates rather than reads */ int doIntegrityCk = 0; /* Run PRAGMA integrity_check after the test */ int noSync = 0; /* Disable synchronous mode */ int doFsync = 0; /* Update disk files synchronously */ int doMultiTrans = 0; /* Each operation in its own transaction */ int noCheckpoint = 0; /* Omit the checkpoint in WAL mode */ sqlite3 *db = 0; /* Database connection */ sqlite3_stmt *pStmt = 0; /* Prepared statement for SQL access */ sqlite3_blob *pBlob = 0; /* Handle for incremental Blob I/O */ sqlite3_int64 tmStart; /* Start time */ sqlite3_int64 tmElapsed; /* Elapsed time */ int mmapSize = 0; /* --mmap N argument */ sqlite3_int64 nData = 0; /* Bytes of data */ sqlite3_int64 nTotal = 0; /* Total data read */ unsigned char *pData = 0; /* Content of the blob */ sqlite3_int64 nAlloc = 0; /* Space allocated for pData[] */ const char *zJMode = 0; /* Journal mode */ assert( strcmp(argv[1],"run")==0 ); assert( argc>=3 ); zDb = argv[2]; eType = pathType(zDb); if( eType==PATH_OTHER ) fatalError("unknown object type: \"%s\"", zDb); if( eType==PATH_NEXIST ) fatalError("object does not exist: \"%s\"", zDb); for(i=3; i<argc; i++){ char *z = argv[i]; if( z[0]!='-' ) fatalError("unknown argument: \"%s\"", z); if( z[1]=='-' ) z++; if( strcmp(z, "-asc")==0 ){ eOrder = ORDER_ASC; continue; } if( strcmp(z, "-blob-api")==0 ){ bBlobApi = 1; continue; } if( strcmp(z, "-cache-size")==0 ){ if( i==argc-1 ) fatalError("missing argument on \"%s\"", argv[i]); iCache = integerValue(argv[++i]); continue; } if( strcmp(z, "-count")==0 ){ if( i==argc-1 ) fatalError("missing argument on \"%s\"", argv[i]); nCount = integerValue(argv[++i]); if( nCount<1 ) fatalError("the --count must be positive"); continue; } if( strcmp(z, "-desc")==0 ){ eOrder = ORDER_DESC; continue; } if( strcmp(z, "-fsync")==0 ){ doFsync = 1; continue; } if( strcmp(z, "-integrity-check")==0 ){ doIntegrityCk = 1; continue; } if( strcmp(z, "-jmode")==0 ){ if( i==argc-1 ) fatalError("missing argument on \"%s\"", argv[i]); zJMode = argv[++i]; continue; } if( strcmp(z, "-mmap")==0 ){ if( i==argc-1 ) fatalError("missing argument on \"%s\"", argv[i]); mmapSize = integerValue(argv[++i]); if( nCount<0 ) fatalError("the --mmap must be non-negative"); continue; } if( strcmp(z, "-max-id")==0 ){ if( i==argc-1 ) fatalError("missing argument on \"%s\"", argv[i]); iMax = integerValue(argv[++i]); continue; } if( strcmp(z, "-multitrans")==0 ){ doMultiTrans = 1; continue; } if( strcmp(z, "-nocheckpoint")==0 ){ noCheckpoint = 1; continue; } if( strcmp(z, "-nosync")==0 ){ noSync = 1; continue; } if( strcmp(z, "-random")==0 ){ eOrder = ORDER_RANDOM; continue; } if( strcmp(z, "-start")==0 ){ if( i==argc-1 ) fatalError("missing argument on \"%s\"", argv[i]); iKey = integerValue(argv[++i]); if( iKey<1 ) fatalError("the --start must be positive"); continue; } if( strcmp(z, "-stats")==0 ){ bStats = 1; continue; } if( strcmp(z, "-update")==0 ){ isUpdateTest = 1; continue; } fatalError("unknown option: \"%s\"", argv[i]); } if( eType==PATH_DB ){ /* Recover any prior crashes prior to starting the timer */ sqlite3_open(zDb, &db); sqlite3_exec(db, "SELECT rowid FROM sqlite_schema LIMIT 1", 0, 0, 0); sqlite3_close(db); db = 0; } tmStart = timeOfDay(); if( eType==PATH_DB ){ char *zSql; rc = sqlite3_open(zDb, &db); if( rc ){ fatalError("cannot open database \"%s\": %s", zDb, sqlite3_errmsg(db)); } zSql = sqlite3_mprintf("PRAGMA mmap_size=%d", mmapSize); sqlite3_exec(db, zSql, 0, 0, 0); sqlite3_free(zSql); zSql = sqlite3_mprintf("PRAGMA cache_size=%d", iCache); sqlite3_exec(db, zSql, 0, 0, 0); sqlite3_free(zSql); if( noSync ){ sqlite3_exec(db, "PRAGMA synchronous=OFF", 0, 0, 0); } pStmt = 0; sqlite3_prepare_v2(db, "PRAGMA page_size", -1, &pStmt, 0); if( sqlite3_step(pStmt)==SQLITE_ROW ){ iPagesize = sqlite3_column_int(pStmt, 0); } sqlite3_finalize(pStmt); sqlite3_prepare_v2(db, "PRAGMA cache_size", -1, &pStmt, 0); if( sqlite3_step(pStmt)==SQLITE_ROW ){ iCache = sqlite3_column_int(pStmt, 0); }else{ iCache = 0; } sqlite3_finalize(pStmt); pStmt = 0; if( zJMode ){ zSql = sqlite3_mprintf("PRAGMA journal_mode=%Q", zJMode); sqlite3_exec(db, zSql, 0, 0, 0); sqlite3_free(zSql); if( noCheckpoint ){ sqlite3_exec(db, "PRAGMA wal_autocheckpoint=0", 0, 0, 0); } } sqlite3_prepare_v2(db, "PRAGMA journal_mode", -1, &pStmt, 0); if( sqlite3_step(pStmt)==SQLITE_ROW ){ zJMode = sqlite3_mprintf("%s", sqlite3_column_text(pStmt, 0)); }else{ zJMode = "???"; } sqlite3_finalize(pStmt); if( iMax<=0 ){ sqlite3_prepare_v2(db, "SELECT max(k) FROM kv", -1, &pStmt, 0); if( sqlite3_step(pStmt)==SQLITE_ROW ){ iMax = sqlite3_column_int(pStmt, 0); } sqlite3_finalize(pStmt); } pStmt = 0; if( !doMultiTrans ) sqlite3_exec(db, "BEGIN", 0, 0, 0); } if( iMax<=0 ) iMax = 1000; for(i=0; i<nCount; i++){ if( eType==PATH_DIR || eType==PATH_TREE ){ /* CASE 1: Reading or writing blobs out of separate files */ char *zKey; if( eType==PATH_DIR ){ zKey = sqlite3_mprintf("%s/%06d", zDb, iKey); }else{ zKey = sqlite3_mprintf("%s/%02d/%02d/%02d", zDb, iKey/10000, (iKey/100)%100, iKey%100); } nData = 0; if( isUpdateTest ){ updateFile(zKey, &nData, doFsync); }else{ pData = readFile(zKey, &nData); sqlite3_free(pData); } sqlite3_free(zKey); }else if( bBlobApi ){ /* CASE 2: Reading from database using the incremental BLOB I/O API */ if( pBlob==0 ){ rc = sqlite3_blob_open(db, "main", "kv", "v", iKey, isUpdateTest, &pBlob); if( rc ){ fatalError("could not open sqlite3_blob handle: %s", sqlite3_errmsg(db)); } }else{ rc = sqlite3_blob_reopen(pBlob, iKey); } if( rc==SQLITE_OK ){ nData = sqlite3_blob_bytes(pBlob); if( nAlloc<nData+1 ){ nAlloc = nData+100; pData = sqlite3_realloc64(pData, nAlloc); } if( pData==0 ) fatalError("cannot allocate %d bytes", nData+1); if( isUpdateTest ){ sqlite3_randomness((int)nData, pData); rc = sqlite3_blob_write(pBlob, pData, (int)nData, 0); if( rc!=SQLITE_OK ){ fatalError("could not write the blob at %d: %s", iKey, sqlite3_errmsg(db)); } }else{ rc = sqlite3_blob_read(pBlob, pData, (int)nData, 0); if( rc!=SQLITE_OK ){ fatalError("could not read the blob at %d: %s", iKey, sqlite3_errmsg(db)); } } } }else{ /* CASE 3: Reading from database using SQL */ if( pStmt==0 ){ if( isUpdateTest ){ sqlite3_create_function(db, "remember", 2, SQLITE_UTF8, 0, rememberFunc, 0, 0); rc = sqlite3_prepare_v2(db, "UPDATE kv SET v=randomblob(remember(length(v),?2))" " WHERE k=?1", -1, &pStmt, 0); sqlite3_bind_int64(pStmt, 2, SQLITE_PTR_TO_INT(&nData)); }else{ rc = sqlite3_prepare_v2(db, "SELECT v FROM kv WHERE k=?1", -1, &pStmt, 0); } if( rc ){ fatalError("cannot prepare query: %s", sqlite3_errmsg(db)); } }else{ sqlite3_reset(pStmt); } sqlite3_bind_int(pStmt, 1, iKey); nData = 0; rc = sqlite3_step(pStmt); if( rc==SQLITE_ROW ){ nData = sqlite3_column_bytes(pStmt, 0); pData = (unsigned char*)sqlite3_column_blob(pStmt, 0); } } if( eOrder==ORDER_ASC ){ iKey++; if( iKey>iMax ) iKey = 1; }else if( eOrder==ORDER_DESC ){ iKey--; if( iKey<=0 ) iKey = iMax; }else{ iKey = (randInt()%iMax)+1; } nTotal += nData; if( nData==0 ){ nCount++; nExtra++; } } if( nAlloc ) sqlite3_free(pData); if( pStmt ) sqlite3_finalize(pStmt); if( pBlob ) sqlite3_blob_close(pBlob); if( bStats ){ display_stats(db, 0); } if( db ){ if( !doMultiTrans ) sqlite3_exec(db, "COMMIT", 0, 0, 0); if( !noCheckpoint ){ sqlite3_close(db); db = 0; } } tmElapsed = timeOfDay() - tmStart; if( db && noCheckpoint ){ sqlite3_close(db); db = 0; } if( nExtra ){ printf("%d cycles due to %d misses\n", nCount, nExtra); } if( eType==PATH_DB ){ printf("SQLite version: %s\n", sqlite3_libversion()); if( doIntegrityCk ){ sqlite3_open(zDb, &db); sqlite3_prepare_v2(db, "PRAGMA integrity_check", -1, &pStmt, 0); while( sqlite3_step(pStmt)==SQLITE_ROW ){ printf("integrity-check: %s\n", sqlite3_column_text(pStmt, 0)); } sqlite3_finalize(pStmt); sqlite3_close(db); db = 0; } } printf("--count %d --max-id %d", nCount-nExtra, iMax); switch( eOrder ){ case ORDER_RANDOM: printf(" --random\n"); break; case ORDER_DESC: printf(" --desc\n"); break; default: printf(" --asc\n"); break; } if( eType==PATH_DB ){ printf("--cache-size %d --jmode %s\n", iCache, zJMode); printf("--mmap %d%s\n", mmapSize, bBlobApi ? " --blob-api" : ""); if( noSync ) printf("--nosync\n"); } if( iPagesize ) printf("Database page size: %d\n", iPagesize); printf("Total elapsed time: %.3f\n", tmElapsed/1000.0); if( isUpdateTest ){ printf("Microseconds per BLOB write: %.3f\n", tmElapsed*1000.0/nCount); printf("Content write rate: %.1f MB/s\n", nTotal/(1000.0*tmElapsed)); }else{ printf("Microseconds per BLOB read: %.3f\n", tmElapsed*1000.0/nCount); printf("Content read rate: %.1f MB/s\n", nTotal/(1000.0*tmElapsed)); } return 0; } int main(int argc, char **argv){ if( argc<3 ) showHelp(); if( strcmp(argv[1],"init")==0 ){ return initMain(argc, argv); } if( strcmp(argv[1],"export")==0 ){ return exportMain(argc, argv); } if( strcmp(argv[1],"run")==0 ){ return runMain(argc, argv); } if( strcmp(argv[1],"stat")==0 ){ return statMain(argc, argv); } showHelp(); return 0; } </code> </pre> </blockquote> </div> <footer> This page was generated in about 0.004s by Fossil 2.26 [304503ed24] 2025-02-20 14:48:54 </footer> <script id='href-data' type='text/json'>{"delay":250,"mouseover":1}</script> <script nonce="63ab1b7962a683f77e79639b015c2da8563164c3c2252deb">/* style.c:898 */ function debugMsg(msg){ var n = document.getElementById("debugMsg"); 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