HP VMA-series Memory Arrays Manual do Utilizador descarregar pdf (Página 164)

Chapter 9 - Violin Utilities

164

VMA-series Memory Array Installation and Service Guide

HP-AM456-9002A Rev 01

Syntax

perf_test

For a discussion of using the perf_test utility in Memory Array performance

tuning, see Performance Testing Using perf_test on page 174.

Options

The

perf_test utility has the following options:

Table 9.2 perf_test Utility Options

Option Description

-h | -?

Displays help.

-b block-size

Sets the size of each block, in bytes, such as 128,

512, 1024, and so on.

Recognized unit/size qualifiers include:

k and K for

the appropriate binary multipliers.

-B

[low,high[,step]]

Specifies range of blocks.

-r read-weight

Specifies the read weight, relative to the write

weight. Specify

0 to not do any reads at all.

-w write-weight

Specifies the write weight, relative to the read

weight. Specify

0 to not do any writes at all.

-s memory-size

Specifies the system memory size, in GB (if no units

are provided). Recognized unit/size qualifiers

include:

k, K, m, M, g and G for the appropriate binary

multipliers.

-d duration

Specifies the duration of the test, in seconds, before

terminating. Not specifying the duration, or

specifying

0, allows perf_test to run indefinitely.

-p device-path

Specifies the path to device, such as /dev/sda, and

/dev/vtmsa.

-t num-threads

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.

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