c1f49bedb1
While here, change the recently added mem_size_mb to also use the automatic option parsing for integer values provided by fio. Signed-off-by: Jim Harris <james.r.harris@intel.com> Change-Id: I889073b3b3b01c7003b21d8ace61e71b672ff2df Reviewed-on: https://review.gerrithub.io/367284 Reviewed-by: Daniel Verkamp <daniel.verkamp@intel.com> Tested-by: SPDK Automated Test System <sys_sgsw@intel.com> Reviewed-by: Ben Walker <benjamin.walker@intel.com> |
||
|---|---|---|
| .. | ||
| .gitignore | ||
| example_config.fio | ||
| fio_plugin.c | ||
| full_bench.fio | ||
| Makefile | ||
| README.md | ||
Compiling
First, clone the fio source repository from https://github.com/axboe/fio
git clone https://github.com/axboe/fio
Then check out the fio 2.18 tag
cd fio && git checkout fio-2.18
Finally, compile the code with
./configure && make
Next, edit the CONFIG file located in the root of the SPDK repository and set CONFIG_FIO_PLUGIN to y and FIO_SOURCE_DIR to the location of the fio repository that was just created.
Further, you'll need to build DPDK with -fPIC set. You can do this by modifying your DPDK config file (i.e. config/defconfig_x86_64-native-linuxapp-gcc) to include the line
EXTRA_CFLAGS=-fPIC
At this point, build SPDK as per normal. The fio plugin will be placed in the same directory as this README.
Usage
To use the SPDK fio plugin with fio, specify the plugin binary using LD_PRELOAD when running fio and set ioengine=spdk in the fio configuration file (see example_config.fio in the same directory as this README).
LD_PRELOAD=<path to fio_plugin binary> fio
To select NVMe devices, you simply pass an identifier as the filename in the format
filename=key=value [key=value] ... ns=value
Do not have any ':' in filename, otherwise it will be spilt into several file names. Also the NVMe namespaces start at 1, not 0! The namespace must also be specified at the end.
Local PCIe NVMe devices will be specified using a PCI domain.bus.slot.func traddr format. For example:
filename=trtype=PCIe traddr=0000.04.00.0 ns=1
Remote devices accessed via NVMe over Fabrics will be specified based on the following example:
filename=trtype=RDMA adrfam=IPv4 traddr=192.168.100.8 trsvcid=4420 ns=1
Currently the SPDK fio plugin is limited to 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.