Hook up the file hashing

[fio.git] / HOWTO

diff --git a/HOWTO b/HOWTO
index a20f7141e63593dd8ed54b696ab80c92e28695a4..d8c6b9414eef85be48779d7018682cf2bbd07470 100644 (file)
--- a/HOWTO
+++ b/HOWTO
@@ -344,6 +344,8 @@ ioengine=str        Defines how the job issues io to the file. The following
 
                        psync   Basic pread(2) or pwrite(2) io.
 
 
                        psync   Basic pread(2) or pwrite(2) io.
 

+                       vsync   Basic readv(2) or writev(2) IO.
+

                        libaio  Linux native asynchronous io.
 
                        posixaio glibc posix asynchronous io.
                        libaio  Linux native asynchronous io.
 
                        posixaio glibc posix asynchronous io.


@@ -381,7 +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
                                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
 
                        guasi   The GUASI IO engine is the Generic Userspace
                                Asyncronous Syscall Interface approach