X-Git-Url: https://git.kernel.dk/?p=fio.git;a=blobdiff_plain;f=HOWTO;h=6c7abcc7979d275a0bea276fd09deae69a587fec;hp=0f7909daef68c32e0e4cee1546d4b93a479a3e0a;hb=66347cfa2f73fd76257e058a3649de437c6eccbe;hpb=83da8fbfa3cdcd16bef7276af6aec0eea4a4566b

diff --git a/HOWTO b/HOWTO
index 0f7909da..6c7abcc7 100644
--- a/HOWTO
+++ b/HOWTO
@@ -460,6 +460,10 @@ fadvise_hint=bool By default, fio will use fadvise() to advise the kernel
 		If set, fio will use POSIX_FADV_SEQUENTIAL for sequential
 		IO and POSIX_FADV_RANDOM for random IO.
 
+fadvise_stream=int Notify the kernel what write stream ID to place these
+		writes under. Only supported on Linux. Note, this option
+		may change going forward.
+
 size=int	The total size of file io for this job. Fio will run until
 		this many bytes has been transferred, unless runtime is
 		limited by other options (such as 'runtime', for instance,
@@ -578,8 +582,6 @@ bs_is_seq_rand	If this option is set, fio will use the normal read,write
 
 zero_buffers	If this option is given, fio will init the IO buffers to
 		all zeroes. The default is to fill them with random data.
-		The resulting IO buffers will not be completely zeroed,
-		unless scramble_buffers is also turned off.
 
 refill_buffers	If this option is given, fio will refill the IO buffers
 		on every submit. The default is to only fill it at init
@@ -1466,6 +1468,11 @@ log_store_compressed=bool	If set, and log_compression is also set,
 		command line parameter. The files will be stored with a
 		.fz suffix.
 
+block_error_percentiles=bool	If set, record errors in trim block-sized
+		units from writes and trims and output a histogram of
+		how many trims it took to get to errors, and what kind
+		of error was encountered.
+
 lockmem=int	Pin down the specified amount of memory with mlock(2). Can
 		potentially be used instead of removing memory or booting
 		with less memory to simulate a smaller amount of memory.
@@ -1505,13 +1512,13 @@ clat_percentiles=bool Enable the reporting of percentiles of
 		 completion latencies.
 
 percentile_list=float_list Overwrite the default list of percentiles
-		for completion latencies. Each number is a floating
-		number in the range (0,100], and the maximum length of
-		the list is 20. Use ':' to separate the numbers, and
-		list the numbers in ascending order. For example,
-		--percentile_list=99.5:99.9 will cause fio to report
-		the values of completion latency below which 99.5% and
-		99.9% of the observed latencies fell, respectively.
+		for completion latencies and the block error histogram.
+		Each number is a floating number in the range (0,100],
+		and the maximum length of the list is 20. Use ':'
+		to separate the numbers, and list the numbers in ascending
+		order. For example, --percentile_list=99.5:99.9 will cause
+		fio to report the values of completion latency below which
+		99.5% and 99.9% of the observed latencies fell, respectively.
 
 clocksource=str	Use the given clocksource as the base of timing. The
 		supported options are: