examples/libpmem.fio: clean up example

[fio.git] / fio.1

diff --git a/fio.1 b/fio.1
index 198b9d85f872a4b959fd997dca43326a9f5b5ff4..bd7670a95c493f991467ccac3c3a5b1f3f46bd09 100644 (file)
--- a/fio.1
+++ b/fio.1
@@ -1242,8 +1242,8 @@ WRITEs) that compresses to the specified level. Fio does this by providing a
 mix of random data and a fixed pattern. The fixed pattern is either zeros,
 or the pattern specified by \fBbuffer_pattern\fR. If the pattern option
 is used, it might skew the compression ratio slightly. Note that this is per
-block size unit, for file/disk wide compression level that matches this
-setting, you'll also want to set \fBrefill_buffers\fR.
+block size unit, see \fBbuffer_compress_chunk\fR for setting a finer granularity
+of compressible regions.
 .TP
 .BI buffer_compress_chunk \fR=\fPint
 See \fBbuffer_compress_percentage\fR. This setting allows fio to manage
@@ -1251,7 +1251,8 @@ how big the ranges of random data and zeroed data is. Without this set, fio
 will provide \fBbuffer_compress_percentage\fR of blocksize random data,
 followed by the remaining zeroed. With this set to some chunk size smaller
 than the block size, fio can alternate random and zeroed data throughout the
-I/O buffer.
+I/O buffer. This is particularly useful when bigger block sizes are used
+for a job. Defaults to 512.
 .TP
 .BI buffer_pattern \fR=\fPstr
 If set, fio will fill the I/O buffers with this pattern or with the contents
@@ -1596,6 +1597,11 @@ details of writing an external I/O engine.
 Simply create the files and do no I/O to them.  You still need to set
 \fBfilesize\fR so that all the accounting still occurs, but no actual I/O will be
 done other than creating the file.
+.TP
+.B libpmem
+Read and write using mmap I/O to a file on a filesystem
+mounted with DAX on a persistent memory device through the NVML
+libpmem library.
 .SS "I/O engine specific parameters"
 In addition, there are some parameters which are only valid when a specific
 \fBioengine\fR is in use. These are used identically to normal parameters,
@@ -2729,7 +2735,7 @@ Thread created.
 .B I
 Thread initialized, waiting or generating necessary data.
 .TP
-.B P
+.B p
 Thread running pre\-reading file(s).
 .TP
 .B /