02aa7d925b
spdk_subsystem_init() no longer depends on spdk_event or app.c part of the event framework. This makes it possible to directly call subsystem initialization, instead of invoking each used library. Change-Id: I53550850d54e2397e2719fdeb559ed50aa81e704 Signed-off-by: Tomasz Zawadzki <tomasz.zawadzki@intel.com> Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/464177 Tested-by: SPDK CI Jenkins <sys_sgci@intel.com> Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com> Reviewed-by: Broadcom SPDK FC-NVMe CI <spdk-ci.pdl@broadcom.com> Reviewed-by: Jim Harris <james.r.harris@intel.com>
Compiling fio
Clone the fio source repository from https://github.com/axboe/fio
git clone https://github.com/axboe/fio
cd fio
Compile the fio code and install:
make
make install
Compiling SPDK
Clone the SPDK source repository from https://github.com/spdk/spdk
git clone https://github.com/spdk/spdk
cd 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.