diff options
| -rw-r--r-- | src/cyclictest/cyclictest.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/src/cyclictest/cyclictest.c b/src/cyclictest/cyclictest.c index b45041e..a3e7b1d 100644 --- a/src/cyclictest/cyclictest.c +++ b/src/cyclictest/cyclictest.c @@ -186,6 +186,7 @@ static int use_fifo = 0; static pthread_t fifo_threadid; static int aligned = 0; static int offset = 0; +static int laptop = 0; static pthread_cond_t refresh_on_max_cond = PTHREAD_COND_INITIALIZER; static pthread_mutex_t refresh_on_max_lock = PTHREAD_MUTEX_INITIALIZER; @@ -235,6 +236,11 @@ static void set_latency_target(void) struct stat s; int err; + if (laptop) { + warn("not setting cpu_dma_latency to save battery power\n"); + return; + } + errno = 0; err = stat("/dev/cpu_dma_latency", &s); if (err == -1) { @@ -1020,6 +1026,9 @@ static void display_help(int error) "-i INTV --interval=INTV base interval of thread in us default=1000\n" "-I --irqsoff Irqsoff tracing (used with -b)\n" "-l LOOPS --loops=LOOPS number of loops: default=0(endless)\n" + " --laptop Save battery when running cyclictest\n" + " This will give you poorer realtime results\n" + " but will not drain your battery so quickly\n" "-m --mlockall lock current and future memory allocations\n" "-M --refresh_on_max delay updating the screen until a new max latency is hit\n" "-n --nanosleep use clock_nanosleep\n" @@ -1183,7 +1192,7 @@ enum option_values { OPT_QUIET, OPT_PRIOSPREAD, OPT_RELATIVE, OPT_RESOLUTION, OPT_SYSTEM, OPT_SMP, OPT_THREADS, OPT_TRACER, OPT_UNBUFFERED, OPT_NUMA, OPT_VERBOSE, OPT_WAKEUP, OPT_WAKEUPRT, OPT_DBGCYCLIC, OPT_POLICY, OPT_HELP, OPT_NUMOPTS, - OPT_ALIGNED, + OPT_ALIGNED, OPT_LAPTOP, }; /* Process commandline options */ @@ -1216,6 +1225,7 @@ static void process_options (int argc, char *argv[], int max_cpus) {"histofall", required_argument, NULL, OPT_HISTOFALL }, {"interval", required_argument, NULL, OPT_INTERVAL }, {"irqsoff", no_argument, NULL, OPT_IRQSOFF }, + {"laptop", no_argument, NULL, OPT_LAPTOP }, {"loops", required_argument, NULL, OPT_LOOPS }, {"mlockall", no_argument, NULL, OPT_MLOCKALL }, {"refresh_on_max", no_argument, NULL, OPT_REFRESH }, @@ -1445,6 +1455,8 @@ static void process_options (int argc, char *argv[], int max_cpus) handlepolicy(optarg); break; case OPT_DBGCYCLIC: ct_debug = 1; break; + case OPT_LAPTOP: + laptop = 1; break; } } |