Spdk/test/bdev/bdevperf/conf.json

{
 "subsystems": [
    {
      "subsystem": "bdev",
      "config": [
        {
          "method": "bdev_malloc_create",
          "params": {
            "name": "Malloc0",
            "num_blocks": 102400,
            "block_size": 512
          }
        },
        {
          "method": "bdev_malloc_create",
          "params": {
            "name": "Malloc1",
            "num_blocks": 102400,
            "block_size": 512
          }
        }
      ]
    }
  ]
}