http://snippets.dzone.com/posts Sun, 27 Jul 2008 07:43:53 GMT DZone Snippets: flash code http://snippets.dzone.com/posts/show/5821 Adapted from a LKML posted program. I think I added write support, this for benchmarking random access writes on flash. <br /> <br /><code> <br />/* Simple multi-threaded I/O benchmark program. <br /> * Copyright (C) Michael Tokarev, mjt@tls.msk.ru <br /> * Public domain. <br /> * <br /> * To compile: <br /> * gcc -o iot iot.c -lpthread <br /> * To run: <br /> * Either with disk device or with pre-existing file. <br /> * ./iot [options] filename <br /> * Filename is the file or device to test on. <br /> * By default it uses 8Kb I/O blocks and does sequential read test <br /> * until interrupted. <br /> * To indicate when to stop: <br /> * -t sec - run for this many seconds, say, 30, to eliminate random <br /> * noise. <br /> * -i num - perform this many I/O operations <br /> * To indicate R/W mode: <br /> * -wn, -Wn, -rn, -Rn -- <br /> * perform linear or random write (note: all data will be lost!), <br /> * or linear or random read, using given number of threads (n). <br /> * I/O modes: <br /> * -s - syncronous write (O_SYNC) <br /> * -d - direct I/O (O_DIRECT) <br /> * -b bs - block size in bytes <br /> * And finally: <br /> * -h - display usage. <br /> * Example: <br /> * ./iot -t30 -W4 -R4 -d -b8192 /dev/sdb <br /> * perform random read/write test (4 readers and 4 writers) <br /> * for 30 seconds using direct I/O and block size of 8Kb. <br /> * <br /> * Note: for small blocksize (<64Kb at least) and using direct random I/O, <br /> * nowadays drives sometimes gives transfer rates below 1Mb/sec - this is <br /> * expectable, don't be afraid of so low numbers. The reason is simple: <br /> * in order to access a given block of data, a disk drive has to seek to the <br /> * right track (average seek time) and wait for the right sector to be near <br /> * the head (rotation latency). Sum up the two, and divide 1 sec to the <br /> * result -- you'll have max number of requests/sec a drive can perform, <br /> * not counting the actual data transfer (which reduces this number further). <br /> * With, say, 5ms seek time + rotation latency, we'll have 200 requests/sec, <br /> * which, with 4Kb request size, will be about 800Kb/sec - which is below <br /> * 1Mb/sec, not counting the actual transfer... <br /> * <br /> */ <br /> <br />#define _GNU_SOURCE <br />#define _BSD_SOURCE <br />#define _LARGEFILE_SOURCE <br />#define _FILE_OFFSET_BITS 64 <br /> <br />//#define USE_DEV_URANDOM /* was not a good idea */ <br /> <br />#include <sys/types.h> <br />#include <unistd.h> <br />#include <fcntl.h> <br />#include <errno.h> <br />#include <stdlib.h> <br />#include <stdio.h> <br />#include <sys/time.h> <br />#include <sys/ioctl.h> <br />#include <signal.h> <br />#include <pthread.h> <br />#include <string.h> <br /> <br />#ifndef BLKGETSIZE64 <br />#define BLKGETSIZE64 _IOR(0x12,114,size_t) <br /> /* linux-specific. return device size in bytes (u64 *arg) */ <br />#endif <br /> <br />static void edie(const char *what) { <br /> fprintf(stderr, "%s: %m \n", what); <br /> exit(1); <br />} <br /> <br />#ifdef USE_DEV_URANDOM <br />static int randfd; <br />#endif <br />static int oflags; // open flags <br />static char *fn; // filename <br />static unsigned bs = 8192; // block size <br />static unsigned bc; // block count (device size in blocks) <br />static unsigned bm; // blocks to do <br /> <br />#define MFrnd 1 <br />#define MFwrt 2 <br />#define LinRd 0 <br />#define RndRd MFrnd <br />#define LinWr MFwrt <br />#define RndWr (MFrnd|MFwrt) <br /> <br />struct state { <br /> int fd; <br /> char *buf; <br /> unsigned ioc; // I/O count <br /> int (*workfn)(struct state *, unsigned blocknr); <br /> unsigned (*posfn)(struct state *s); <br /> unsigned opi; // operation index <br /> unsigned i; // curidx <br /> double stime; // start time <br /> unsigned bn; // current block number for linear i/o <br />}; <br />static unsigned int alternate; <br />static unsigned tioc; // total i/o count <br />static struct state *states; <br />static unsigned nt[4]; <br />static unsigned ntt; <br />static volatile unsigned running; <br />static const char *const ion[4] = { "LinRd", "RndRd", "LinWr", "RndWr" }; <br /> <br />static pthread_mutex_t rnmtx = PTHREAD_MUTEX_INITIALIZER; <br />static pthread_cond_t rncond = PTHREAD_COND_INITIALIZER; <br /> <br />static double curtime(void) { <br /> struct timeval tv; <br /> gettimeofday(&tv, NULL); <br /> return tv.tv_sec + tv.tv_usec / 1000000.0; <br />} <br /> <br />static unsigned randpos(struct state *s) { <br /> unsigned n; <br />#ifdef USE_DEV_URANDOM <br /> read(randfd, &n, sizeof(n)); <br />#else <br /> n = lrand48(); <br />#endif <br /> s = s; <br /> if(alternate == 1) { <br /> if(n > bc/2) { <br /> return bc-1; <br /> } else { <br /> return 0; <br /> } <br /> } <br /> return n % bc; <br />} <br /> <br />static unsigned linpos(struct state *s) { <br /> if (s->bn >= bc) <br /> s->bn = 0; <br /> return s->bn++; <br />} <br /> <br />static int wwriter(struct state *s, unsigned b) { <br /> return pwrite(s->fd, s->buf, bs, (off_t)b * bs); <br />} <br />static int wreader(struct state *s, unsigned b) { <br /> return pread(s->fd, s->buf, bs, (off_t)b * bs); <br />} <br /> <br />static void pst(FILE *f) { <br /> double ct = curtime(); <br /> double r[4] = { 0, 0, 0, 0 }; <br /> unsigned c[4] = { 0, 0, 0, 0 }; <br /> unsigned i; <br /> double d; <br /> for(i = 0; i < ntt; ++i) { <br /> d = ct - states[i].stime; <br /> r[states[i].opi] += states[i].ioc / d; <br /> c[states[i].opi] += states[i].ioc; <br /> } <br />#if 1 <br /> for(i = 0; i < 4; ++i) <br /> if (c[i]) <br /> fprintf(f, " %s %u %.2f", ion[i], c[i], r[i] * bs / 1024 / 1024); <br />#endif <br />} <br /> <br />static void incc() { <br /> if (!(++tioc % 1000)) <br /> pthread_cond_signal(&rncond); <br />} <br />static void decnr() { <br /> pthread_mutex_lock(&rnmtx); <br /> --running; <br /> pthread_mutex_unlock(&rnmtx); <br /> pthread_cond_broadcast(&rncond); <br />} <br /> <br />static volatile int term; <br /> <br />void *worker(void *arg) { <br /> struct state *s = arg; <br /> s->workfn = s->opi & MFwrt ? wwriter : wreader; <br /> s->posfn = s->opi & MFrnd ? randpos : linpos; <br /> s->fd = open(fn, (s->opi & MFwrt ? O_WRONLY : O_RDONLY) | oflags); <br /> if (s->fd < 0) { <br /> int e = errno; <br /> decnr(); <br /> errno = e; <br /> edie(fn); <br /> } <br /> s->stime = curtime(); <br /> for(;;) { <br /> if (term) break; <br /> if (s->workfn(s, s->posfn(s)) < 0) { <br /> perror(ion[s->opi]); <br /> break; <br /> } <br /> ++s->ioc; <br /> incc(); <br /> if (bm && s->ioc >= bm) break; <br /> } <br /> decnr(); <br /> return 0; <br />} <br /> <br />static void sig(int s) { <br /> term = s; <br />} <br /> <br />int main(int argc, char **argv) { <br /> int c; <br /> unsigned i, j; <br /> unsigned tm = 0; <br /> struct state *s; <br /> char *buf; <br /> struct timeval first, <br /> second, <br /> lapsed; <br /> <br /> while((c = getopt(argc, argv, "r::R::w::W::adsb:n:i:t:h")) != EOF) switch(c) { <br /> case 'r': nt[LinRd] = optarg ? atoi(optarg) : 1; break; <br /> case 'R': nt[RndRd] = optarg ? atoi(optarg) : 1; break; <br /> case 'w': nt[LinWr] = optarg ? atoi(optarg) : 1; break; <br /> case 'W': nt[RndWr] = optarg ? atoi(optarg) : 1; break; <br /> case 'd': oflags |= O_DIRECT; break; <br /> case 's': oflags |= O_SYNC; break; <br /> case 'b': bs = atoi(optarg); break; <br /> case 'n': bc = atoi(optarg); break; <br /> case 'i': bm = atoi(optarg); break; <br /> case 't': tm = atoi(optarg); break; <br /> case 'a': alternate = 1; break; <br /> case 'h': <br /> puts( <br />"iotest: perform I/O speed test\n" <br />"Usage is: iotest [options] device-or-file\n" <br />"options:\n" <br />" -r[n] - linear read test (n readers)\n" <br />" -R[n] - random read test (n readers)\n" <br />" -w[n] - linear write test (n writers)\n" <br />" -W[n] - random write test (n writers)\n" <br />" -d - use direct I/O (O_DIRECT)\n" <br />" -s - use syncronous I/O (O_SYNC)\n" <br />" -b bs - blocksize (default is 8192)\n" <br />" -n bc - block count (default is whole device/file)\n" <br />" -i nb - number of I/O iterations to perform\n" <br />" -t sec - time to spend on all I/O\n" <br />" -h - this help\n" <br />"It's ok to specify all, one or some of -r,-R,-w and -W\n" <br />); <br /> return 0; <br /> default: fprintf(stderr, "try `iotest -h' for help\n"); exit(1); <br /> } <br /> <br /> if (optind + 1 != argc) { <br /> fprintf(stderr, "exactly one device/file argument expected\n"); <br /> return 1; <br /> } <br /> fn = argv[optind]; <br /> <br /> ntt = nt[0] + nt[1] + nt[2] + nt[3]; <br /> if (!ntt) <br /> nt[LinRd] = ntt = 1; <br /> <br /> c = open(fn, (nt[LinWr] + nt[RndWr] ? O_RDWR : O_RDONLY) | oflags); <br /> if (c < 0) edie(fn); <br /> if (!bc) { <br /> unsigned long long sz; <br /> struct stat st; <br /> fstat(c, &st); <br /> if (st.st_size) sz = st.st_size; <br /> else ioctl(c, BLKGETSIZE64, &sz); <br /> bc = sz / bs; <br /> fprintf(stderr, "size = %lld (%u blocks)\n", sz, bc); <br /> } <br /> close(c); <br /> if (nt[RndRd] || nt[RndWr]) { <br />#ifdef USE_DEV_URANDOM <br /> randfd = open("/dev/urandom", O_RDONLY); <br /> if (randfd < 0) edie("/dev/urandom"); <br />#else <br />#if 0 <br /> struct timeval tv; <br /> gettimeofday(&tv, NULL); <br /> srand48(tv.tv_usec ^ getpid()); <br />#else <br /> srand48(0xfeda432); // arbitrary, to get repeated values on repeated runs <br />#endif <br />#endif <br /> } <br /> <br /> gettimeofday(&first, NULL); <br /> <br /> states = calloc(ntt, sizeof(*states)); <br /> s = states; <br /> <br /> buf = valloc(ntt * bs); <br /> if (tm) { <br /> signal(SIGALRM, sig); <br /> alarm(tm); <br /> } <br /> running = ntt; <br /> for(j = 0; j < 4; ++j) <br /> for(i = 0; i < nt[j]; ++i) { <br /> pthread_t t; <br /> s->buf = buf; buf += bs; <br /> s->opi = j; <br /> s->i = i; <br /> pthread_create(&t, NULL, worker, s++); <br /> } <br /> while(running) { <br /> pthread_cond_wait(&rncond, &rnmtx); <br /> putc('\r', stderr); <br /> pst(stderr); <br /> } <br /> <br /> putc('\r', stderr); <br /> pst(stdout); <br /> putc('\n', stdout); <br /> <br /> gettimeofday(&second, NULL); <br /> <br /> if (first.tv_usec > second.tv_usec) { <br /> second.tv_usec += 1000000; <br /> second.tv_sec--; <br /> } <br /> <br /> lapsed.tv_usec = second.tv_usec - first.tv_usec; <br /> lapsed.tv_sec = second.tv_sec - first.tv_sec; <br /> <br /> <br /> <br /> if (nt[RndRd] || nt[RndWr]) { <br /> printf("I/O latency: %f\n", (lapsed.tv_sec*1000+(lapsed.tv_usec/1000))/(float)tioc); <br /> <br /> } <br /> <br /> return 0; <br />} <br /> <br /></code> Thu, 24 Jul 2008 16:50:04 GMT http://snippets.dzone.com/posts/show/5821 sandos (John Bäckstrand) http://snippets.dzone.com/posts/show/5738 <code> <br />private function DetermineGridSteps(min, max, num_steps) { <br /> num_steps = num_steps || 5; <br /> var rough_step = (max - min) / num_steps; <br /> var exponent = Math.floor(Math.log(Math.abs(rough_step)) / Math.LN10); <br /> if (rough_step == 0) exponent = 0; <br /> <br /> var tenToPower = Math.pow(10, exponent); <br /> var mantissa = rough_step / tenToPower; <br /> var step = Math.ceil(mantissa) * tenToPower; <br /> <br /> var steps = Array(); <br /> steps.push(min); <br /> <br /> var next_step = (Math.ceil(min/step) * step); <br /> if (next_step <= min) next_step += step; <br /> while(next_step < max) { <br /> steps.push(next_step); <br /> next_step += step; <br /> } <br /> steps.push(max); <br />} <br /></code> <br /> <br />0 --> 10 <br />0__2__4__6__8__10 <br /> <br />1 --> 10 <br />1__2__4__6__8__10 <br /> <br />0 --> 50 <br />0__10__20__30__40__50 <br /> <br />1 --> 499 <br />1__100__200__300__400__499 <br /> <br />0 --> 1.7 <br />0__0.4__0.8__1.2__1.6__1.7 <br /> <br />1 --> 49999 <br />1__10000__20000__30000__40000__49999 <br /> <br />361 --> 413 <br />361__380__400__413 <br /> Tue, 08 Jul 2008 19:40:12 GMT http://snippets.dzone.com/posts/show/5738 jamesv (james vreeland) http://snippets.dzone.com/posts/show/5271 Somewhat lame, but handy nonetheless. <br /> <br /><code> <br /><% if flash[:warning] or flash[:notice] %> <br /> <div id="notice" <% if flash[:warning] %>class="warning"<% end %>> <br /> <%= flash[:warning] || flash[:notice] %> <br /> </div> <br /> <script type="text/javascript"> <br /> setTimeout("new Effect.Fade('notice');", 15000) <br /> </script> <br /><% end %> <br /></code> Sun, 23 Mar 2008 00:01:03 GMT http://snippets.dzone.com/posts/show/5271 timmorgan (Tim Morgan) http://snippets.dzone.com/posts/show/5187 Bash one-liner that converts all *.flvs in the current directory to .avis. <br /> <br />Note: To convert something else, just change the .flv extension. <br /> <br /><code> <br />for i in *.flv; do mencoder -ovc lavc -oac mp3lame -o "$i.avi" "$i"; done <br /></code> Fri, 29 Feb 2008 12:58:02 GMT http://snippets.dzone.com/posts/show/5187 scvalex (Alexandru Scvortov) http://snippets.dzone.com/posts/show/5170 - open the bundle editor and select the Actionscript bundle <br />- use the add button to make a new preference item, give it a scope of source.actionscript <br />- name it whatever <br />- paste in the following: <br /> <br /><code> <br />{ shellVariables = ( <br /> { name = 'TM_COMMENT_START'; <br /> value = '// '; <br /> }, <br /> ); <br />} <br /></code> <br /> <br />- that's it! got these instructions on IRC from Infininight: http://pastie.textmate.org/private/clmfldbv2sexjcd7u6qjw Sun, 24 Feb 2008 22:49:14 GMT http://snippets.dzone.com/posts/show/5170 sikelianos (Zeke Sikelianos) http://snippets.dzone.com/posts/show/5138 // Add this to your package.. <br />import flash.text.*; <br /> <br />// And throw this in wherever.. <br />var t:TextField = new TextField(); <br />t.autoSize = TextFieldAutoSize.LEFT; <br />t.border = true; <br />addChild(t); <br /> <br />t.appendText("params:" + "\n"); <br />try { <br /> var key:String; <br /> var val:String; <br /> var flashvars:Object = LoaderInfo(this.root.loaderInfo).parameters; <br /> for (key in flashvars) { <br /> val = String(flashvars[key]); <br /> t.appendText("\t" + key + ":\t" + val + "\n"); <br /> } <br />} catch (error:Error) { <br /> t.appendText(error); <br />} Wed, 13 Feb 2008 18:25:17 GMT http://snippets.dzone.com/posts/show/5138 sikelianos (Zeke Sikelianos) http://snippets.dzone.com/posts/show/5028 <code> <br /><? <br /> // if www.domain.com, redirect to domain.com <br /> if (strtolower(substr($_SERVER['HTTP_HOST'], 0, 3)) == "www") { <br /> header("Location: http://rgcreative.com" . $_SERVER['REQUEST_URI']); <br /> } <br /> <br /> // Full path to current URL (including query string) <br /> //echo "http://" . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI']; <br />?> <br /></code> Tue, 22 Jan 2008 21:09:23 GMT http://snippets.dzone.com/posts/show/5028 sikelianos (Zeke Sikelianos) http://snippets.dzone.com/posts/show/4943 Rails Helper <br /> <br /><code rails> <br /> def print_flash <br /> msg = '' <br /> flash.each_pair do |type, message| <br /> text = content_tag(:strong, type.to_s.capitalize) << ": " << message <br /> msg << content_tag(:p, text, :class => "flash #{type}") <br /> end <br /> msg <br /> end <br /></code> Thu, 03 Jan 2008 02:32:34 GMT http://snippets.dzone.com/posts/show/4943 tymps (Paulo Pereira) http://snippets.dzone.com/posts/show/4825 // description of your code here <br /> <br /><code> <br /><button label="ANT Build" click="PluginCommand" image="54" tag="Run;SaveAll;ant" shortcut="CtrlF7" /> <br /></code> Thu, 29 Nov 2007 07:39:06 GMT http://snippets.dzone.com/posts/show/4825 yuanyc (yuanyunchang) http://snippets.dzone.com/posts/show/4824 // description of your code here <br /> <br /><code> <br /><OBJECT classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" <br />codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,40,0" <br />WIDTH="550" HEIGHT="400" id="myMovieName"> <br /><PARAM NAME=movie VALUE="myFlashMovie.swf"> <br /><PARAM NAME=quality VALUE=high> <br /><PARAM NAME=bgcolor VALUE=#FFFFFF> <br /><param name="allowFullScreen" value="true" /> <br /><EMBED src="/support/flash/ts/documents/myFlashMovie.swf" quality=high bgcolor=#FFFFFF WIDTH="550" HEIGHT="400" <br />allowFullScreen="true" <br />NAME="myMovieName" ALIGN="" TYPE="application/x-shockwave-flash" <br />PLUGINSPAGE="http://www.macromedia.com/go/getflashplayer"> <br /></EMBED> <br /></OBJECT> <br /></code> Thu, 29 Nov 2007 07:16:20 GMT http://snippets.dzone.com/posts/show/4824 yuanyc (yuanyunchang)