[PATCH] Basic support for a cpu cycle eater job
This will allow you to put some cpu load on the box, while other
threads are doing IO.
diff --git a/init.c b/init.c
index c1e26d3..1ffd6ff 100644
--- a/init.c
+++ b/init.c
@@ -196,9 +196,12 @@
ddir = td->ddir + (!td->sequential << 1) + (td->iomix << 2);
if (!terse_output) {
- if (!job_add_num)
- fprintf(f_out, "%s: (g=%d): rw=%s, odir=%d, bs=%d-%d, rate=%d, ioengine=%s, iodepth=%d\n", td->name, td->groupid, ddir_str[ddir], td->odirect, td->min_bs, td->max_bs, td->rate, td->io_engine_name, td->iodepth);
- else if (job_add_num == 1)
+ if (!job_add_num) {
+ if (td->io_engine == FIO_CPUIO)
+ fprintf(f_out, "%s: ioengine=cpu, cpuload=%u, cpucycle=%u\n", td->name, td->cpuload, td->cpucycle);
+ else
+ fprintf(f_out, "%s: (g=%d): rw=%s, odir=%d, bs=%d-%d, rate=%d, ioengine=%s, iodepth=%d\n", td->name, td->groupid, ddir_str[ddir], td->odirect, td->min_bs, td->max_bs, td->rate, td->io_engine_name, td->iodepth);
+ } else if (job_add_num == 1)
fprintf(f_out, "...\n");
}
@@ -616,9 +619,13 @@
strcpy(td->io_engine_name, "splice");
td->io_engine = FIO_SPLICEIO;
return 0;
+ } else if (!strncmp(str, "cpu", 3)) {
+ strcpy(td->io_engine_name, "cpu");
+ td->io_engine = FIO_CPUIO;
+ return 0;
}
- log_err("fio: ioengine: { linuxaio, aio, libaio }, posixaio, sync, mmap, sgio, splice\n");
+ log_err("fio: ioengine: { linuxaio, aio, libaio }, posixaio, sync, mmap, sgio, splice, cpu\n");
return 1;
}
@@ -726,6 +733,14 @@
fgetpos(f, &off);
continue;
}
+ if (!check_int(p, "cpuload", &td->cpuload)) {
+ fgetpos(f, &off);
+ continue;
+ }
+ if (!check_int(p, "cpuchunks", &td->cpucycle)) {
+ fgetpos(f, &off);
+ continue;
+ }
if (!check_int(p, "thinktime", &td->thinktime)) {
fgetpos(f, &off);
continue;