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Dariusz Stojaczyk b8f40516f0 test/bdev: add --spdk_mem param to fio_plugin

This is required for current virtio implementation,
as it supports only up to 8 hugepages.

Change-Id: I3e89a54188097987947de40f6dcdedc46285252f
Signed-off-by: Dariusz Stojaczyk <dariuszx.stojaczyk@intel.com>
Reviewed-on: https://review.gerrithub.io/380984
Tested-by: SPDK Automated Test System <sys_sgsw@intel.com>
Reviewed-by: Pawel Wodkowski <pawelx.wodkowski@intel.com>
Reviewed-by: Pawel Kaminski <pawelx.kaminski@intel.com>
Reviewed-by: Daniel Verkamp <daniel.verkamp@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>

2017-10-09 19:38:27 -04:00

.gitignore

bdev: Add an example fio plugin

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bdev.conf.in

bdev: Add an example fio plugin

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example_config.fio

bdev: Add an example fio plugin

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fio_plugin.c

test/bdev: add --spdk_mem param to fio_plugin

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full_bench.fio

bdev: Add an example fio plugin

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Makefile

bdev: Add an example fio plugin

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README.md

bdev: Add an example fio plugin

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README.md

Compiling fio

Clone the fio source repository from https://github.com/axboe/fio

git clone https://github.com/axboe/fio

Then check out the fio 2.21:

cd fio && git checkout fio-2.21

Finally, compile the code:

make

Compiling SPDK

Clone the SPDK source repository from https://github.com/spdk/spdk

git clone https://github.com/spdk/spdk
git submodule update --init

Then, run the SPDK configure script to enable fio (point it to the root of the fio repository):

cd spdk
./configure --with-fio=/path/to/fio/repo <other configuration options>

Finally, build SPDK:

make

Note to advanced users: These steps assume you're using the DPDK submodule. If you are using your own version of DPDK, the fio plugin requires that DPDK be compiled with -fPIC. You can compile DPDK with -fPIC by modifying your DPDK configuration file and adding the line:

EXTRA_CFLAGS=-fPIC

Usage

To use the SPDK fio plugin with fio, specify the plugin binary using LD_PRELOAD when running fio and set ioengine=spdk_bdev in the fio configuration file (see example_config.fio in the same directory as this README).

LD_PRELOAD=<path to spdk repo>/examples/bdev/fio_plugin/fio_plugin fio

The fio configuration file must contain one new parameter:

spdk_conf=./examples/bdev/fio_plugin/bdev.conf

This must point at an SPDK configuration file. There are a number of example configuration files in the SPDK repository under etc/spdk.

You can specify which block device to run against by setting the filename parameter to the block device name:

filename=Malloc0

Or for NVMe devices:

filename=Nvme0n1

Currently the SPDK fio plugin is limited to the thread usage model, so fio jobs must also specify thread=1 when using the SPDK fio plugin.

fio also currently has a race condition on shutdown if dynamically loading the ioengine by specifying the engine's full path via the ioengine parameter - LD_PRELOAD is recommended to avoid this race condition.

When testing random workloads, it is recommended to set norandommap=1. fio's random map processing consumes extra CPU cycles which will degrade performance over time with the fio_plugin since all I/O are submitted and completed on a single CPU core.