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 cfdf281d1b2ede15ecb7aea920af4eca3bb3b0d1..85598ef77fb9acd8d4868d6e15de1d9f64bee83f 100644 (file)
--- a/engines/cpu.c
+++ b/engines/cpu.c
@@ -7,49 +7,95 @@
  */
 #include "../fio.h"
 
-static int fio_cpuio_queue(struct thread_data *td, struct io_u fio_unused *io_u)
-{
-       __usec_sleep(td->o.cpucycle);
-       return FIO_Q_COMPLETED;
-}
+struct cpu_options {
+       struct thread_data *td;
+       unsigned int cpuload;
+       unsigned int cpucycle;
+       unsigned int exit_io_done;
+};
+
+static struct fio_option options[] = {
+       {
+               .name   = "cpuload",
+               .lname  = "CPU load",
+               .type   = FIO_OPT_INT,
+               .off1   = offsetof(struct cpu_options, cpuload),
+               .help   = "Use this percentage of CPU",
+               .category = FIO_OPT_C_GENERAL,
+               .group  = FIO_OPT_G_INVALID,
+       },
+       {
+               .name   = "cpuchunks",
+               .lname  = "CPU chunk",
+               .type   = FIO_OPT_INT,
+               .off1   = offsetof(struct cpu_options, cpucycle),
+               .help   = "Length of the CPU burn cycles (usecs)",
+               .def    = "50000",
+               .parent = "cpuload",
+               .hide   = 1,
+               .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,
+       },
+};
 
-static int fio_cpuio_setup(struct thread_data fio_unused *td)
+
+static int fio_cpuio_queue(struct thread_data *td, struct io_u fio_unused *io_u)
 {
-       struct fio_file *f;
-       unsigned int i;
+       struct cpu_options *co = td->eo;
 
-       for_each_file(td, f, i)
-               f->real_file_size = -1ULL;
+       if (co->exit_io_done && !fio_running_or_pending_io_threads()) {
+               td->done = 1;
+               return FIO_Q_BUSY;
+       }
 
-       return 0;
+       usec_spin(co->cpucycle);
+       return FIO_Q_COMPLETED;
 }
 
 static int fio_cpuio_init(struct thread_data *td)
 {
        struct thread_options *o = &td->o;
+       struct cpu_options *co = td->eo;
 
-       if (!o->cpuload) {
+       if (!co->cpuload) {
                td_vmsg(td, EINVAL, "cpu thread needs rate (cpuload=)","cpuio");
                return 1;
        }
 
-       if (o->cpuload > 100)
-               o->cpuload = 100;
+       if (co->cpuload > 100)
+               co->cpuload = 100;
 
        /*
         * set thinktime_sleep and thinktime_spin appropriately
         */
        o->thinktime_blocks = 1;
        o->thinktime_spin = 0;
-       o->thinktime = (o->cpucycle * (100 - o->cpuload)) / o->cpuload;
+       o->thinktime = (co->cpucycle * (100 - co->cpuload)) / co->cpuload;
 
        o->nr_files = o->open_files = 1;
+
+       log_info("%s: ioengine=cpu, cpuload=%u, cpucycle=%u\n", td->o.name,
+                                               co->cpuload, co->cpucycle);
+
        return 0;
 }
 
-static int fio_cpuio_open(struct thread_data fio_unused *td, struct fio_file *f)
+static int fio_cpuio_open(struct thread_data fio_unused *td,
+                         struct fio_file fio_unused *f)
 {
-       f->fd = 0;
        return 0;
 }
 
@@ -58,9 +104,10 @@ static struct ioengine_ops ioengine = {
        .version        = FIO_IOOPS_VERSION,
        .queue          = fio_cpuio_queue,
        .init           = fio_cpuio_init,
-       .setup          = fio_cpuio_setup,
        .open_file      = fio_cpuio_open,
-       .flags          = FIO_SYNCIO | FIO_DISKLESSIO,
+       .flags          = FIO_SYNCIO | FIO_DISKLESSIO | FIO_NOIO,
+       .options                = options,
+       .option_struct_size     = sizeof(struct cpu_options),
 };
 
 static void fio_init fio_cpuio_register(void)