fio: HOWTO update

[fio.git] / HOWTO

diff --git a/HOWTO b/HOWTO
index 3d6b354b87b7df40f723c497ab82b1424cd287f6..d8c6b9414eef85be48779d7018682cf2bbd07470 100644 (file)
--- a/HOWTO
+++ b/HOWTO
@@ -344,7 +344,7 @@ ioengine=str        Defines how the job issues io to the file. The following
 
                        psync   Basic pread(2) or pwrite(2) io.
 
-                       vsync   Basic readv(2) or writev(3) IO.
+                       vsync   Basic readv(2) or writev(2) IO.
 
                        libaio  Linux native asynchronous io.
 
@@ -383,7 +383,10 @@ ioengine=str       Defines how the job issues io to the file. The following
                                cycles according to the cpuload= and
                                cpucycle= options. Setting cpuload=85
                                will cause that job to do nothing but burn
-                               85% of the CPU.
+                               85% of the CPU. In case of SMP machines,
+                               use numjobs=<no_of_cpu> to get desired CPU
+                               usage, as the cpuload only loads a single
+                               CPU at the desired rate.
 
                        guasi   The GUASI IO engine is the Generic Userspace
                                Asyncronous Syscall Interface approach