Add exit_on_io_done option to the CPU IO engine

[fio.git] / engines / cpu.c

diff --git a/engines/cpu.c b/engines/cpu.c
index c798f1884e8dff8df9b079d87d61c8c4259ae10c..85598ef77fb9acd8d4868d6e15de1d9f64bee83f 100644 (file)
--- a/engines/cpu.c
+++ b/engines/cpu.c
@@ -11,6 +11,7 @@ struct cpu_options {
        struct thread_data *td;
        unsigned int cpuload;
        unsigned int cpucycle;
+       unsigned int exit_io_done;
 };
 
 static struct fio_option options[] = {
@@ -35,6 +36,16 @@ static struct fio_option options[] = {
                .category = FIO_OPT_C_GENERAL,
                .group  = FIO_OPT_G_INVALID,
        },
+       {
+               .name   = "exit_on_io_done",
+               .lname  = "Exit when IO threads are done",
+               .type   = FIO_OPT_BOOL,
+               .off1   = offsetof(struct cpu_options, exit_io_done),
+               .help   = "Exit when IO threads finish",
+               .def    = "0",
+               .category = FIO_OPT_C_GENERAL,
+               .group  = FIO_OPT_G_INVALID,
+       },
        {
                .name   = NULL,
        },
@@ -45,6 +56,11 @@ static int fio_cpuio_queue(struct thread_data *td, struct io_u fio_unused *io_u)
 {
        struct cpu_options *co = td->eo;
 
+       if (co->exit_io_done && !fio_running_or_pending_io_threads()) {
+               td->done = 1;
+               return FIO_Q_BUSY;
+       }
+
        usec_spin(co->cpucycle);
        return FIO_Q_COMPLETED;
 }