diff options
| -rw-r--r-- | btreplay/btreplay.c | 27 | ||||
| -rw-r--r-- | btreplay/doc/btreplay.tex | 13 |
2 files changed, 36 insertions, 4 deletions
diff --git a/btreplay/btreplay.c b/btreplay/btreplay.c index 8e6b7dc..23e13b8 100644 --- a/btreplay/btreplay.c +++ b/btreplay/btreplay.c @@ -154,6 +154,7 @@ static LIST_HEAD(input_files); // List of input files to handle static LIST_HEAD(map_devs); // List of device maps static int nfiles = 0; // Number of files to handle static int no_stalls = 0; // Boolean: Disable pre-stalls +static unsigned acc_factor = 1; // Int: Acceleration factor static int find_records = 0; // Boolean: Find record files auto /* @@ -1175,6 +1176,8 @@ static void stall(struct thr_info *tip, long long oclock) struct timespec req; long long dreal, tclock = gettime() - rgenesis; + oclock /= acc_factor; + if (verbose > 1) fprintf(tip->vfp, " stall(%lld.%09lld, %lld.%09lld)\n", du64_to_sec(oclock), du64_to_nsec(oclock), @@ -1347,22 +1350,23 @@ static void *replay_sub(void *arg) */ static char usage_str[] = \ - "\n" \ + "\n" \ "\t[ -c <cpus> : --cpus=<cpus> ] Default: 1\n" \ "\t[ -d <dir> : --input-directory=<dir> ] Default: .\n" \ - "\t[ -F : --find-records ] Default: Off\n" \ + "\t[ -F : --find-records ] Default: Off\n" \ "\t[ -h : --help ] Default: Off\n" \ "\t[ -i <base> : --input-base=<base> ] Default: replay\n" \ "\t[ -I <iters>: --iterations=<iters> ] Default: 1\n" \ "\t[ -M <file> : --map-devs=<file> ] Default: None\n" \ "\t[ -N : --no-stalls ] Default: Off\n" \ + "\t[ -x : --acc-factor ] Default: 1\n" \ "\t[ -v : --verbose ] Default: Off\n" \ "\t[ -V : --version ] Default: Off\n" \ "\t[ -W : --write-enable ] Default: Off\n" \ "\t<dev...> Default: None\n" \ "\n"; -#define S_OPTS "c:d:Fhi:I:M:Nt:vVW" +#define S_OPTS "c:d:Fhi:I:M:Nx:t:vVW" static struct option l_opts[] = { { .name = "cpus", @@ -1413,6 +1417,12 @@ static struct option l_opts[] = { .val = 'N' }, { + .name = "acc-factor", + .has_arg = required_argument, + .flag = NULL, + .val = 'x' + }, + { .name = "verbose", .has_arg = no_argument, .flag = NULL, @@ -1445,6 +1455,7 @@ static struct option l_opts[] = { static void handle_args(int argc, char *argv[]) { int c; + int r; while ((c = getopt_long(argc, argv, S_OPTS, l_opts, NULL)) != -1) { switch (c) { @@ -1499,6 +1510,16 @@ static void handle_args(int argc, char *argv[]) no_stalls = 1; break; + case 'x': + r = sscanf(optarg,"%u",&acc_factor); + if (r!=1) { + fprintf(stderr, + "Invalid acceleration factor\n"); + exit(ERR_ARGS); + /*NOTREACHED*/ + } + break; + case 'V': fprintf(stderr, "btreplay -- version %s\n", my_btversion); diff --git a/btreplay/doc/btreplay.tex b/btreplay/doc/btreplay.tex index beec720..b4027ff 100644 --- a/btreplay/doc/btreplay.tex +++ b/btreplay/doc/btreplay.tex @@ -386,12 +386,13 @@ Usage: btreplay -- version 0.9.3 [ -c <cpus> : --cpus=<cpus> ] Default: 1 [ -d <dir> : --input-directory=<dir> ] Default: . - [ -F : --find-records ] Default: Off + [ -F : --find-records ] Default: Off [ -h : --help ] Default: Off [ -i <base> : --input-base=<base> ] Default: replay [ -I <iters>: --iterations=<iters> ] Default: 1 [ -M <file> : --map-devs=<file> ] Default: None [ -N : --no-stalls ] Default: Off + [ -x <int> : --acc-factor=<int> ] Default: 1 [ -v : --verbose ] Default: Off [ -V : --version ] Default: Off [ -W : --write-enable ] Default: Off @@ -496,6 +497,16 @@ Pre-bunch Stalls} When specified on the command line, all pre-bunch stall indicators will be ignored. IOs will be replayed without inter-bunch delays. +\subsubsection{\label{sec:o-x}\texttt{-x} or \texttt{--acc-factor}\\Accelaration +Factor} + + While the \texttt{--no-stalls} option allows the traces to be replayed + with no waiting time, this option specifies some acceleration factor + to be used. If the value of two is used, then the stall time is + divided by half resulting in a reduction of the execution time by + this factor. Note that if this number is too high, the results will + be equivalent of not having stall. + \subsubsection{\label{sec:p-o-v}\texttt{-v} or \texttt{--verbose}\\Select Verbose Output} |