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Chapter 9 - Violin Utilities
164
Syntax
perf_test
For a discussion of using the
tuning, see
Performance Testing Using perf_test
Options
The
utility has the following options:
perf_test
Table 9.2 perf_test Utility Options
Option
-h | -?
-b block-size
-B
[low,high[,step]]
-r read-weight
-w write-weight
-s memory-size
-d duration
-p device-path
-t num-threads
VMA-series Memory Array Installation and Service Guide
utility in Memory Array performance
perf_test
on page 174.
Description
Displays help.
Sets the size of each block, in bytes, such as 128,
512, 1024, and so on.
Recognized unit/size qualifiers include:
the appropriate binary multipliers.
Specifies range of blocks.
Specifies the read weight, relative to the write
weight. Specify
to not do any reads at all.
0
Specifies the write weight, relative to the read
weight. Specify
to not do any writes at all.
0
Specifies the system memory size, in GB (if no units
are provided). Recognized unit/size qualifiers
include:
,
,
,
,
and
k
K
m
M
g
multipliers.
Specifies the duration of the test, in seconds, before
terminating. Not specifying the duration, or
specifying
, allows
0
perf_test
Specifies the path to device, such as
.
/dev/vtmsa
Specifies the number of threads to invoke. Each
thread is governed by the options specified for
reads, writes, verification, block size, and so on, and
operates independently in terms of randomness of
addresses touched.
and
k
K
for the appropriate binary
G
to run indefinitely.
, and
/dev/sda
HP-AM456-9002A Rev 01
for
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