nvmf_rpc: add control for rdma buffer cache size

Change-Id: I63e433a7e0aa5374b12ca6c12a4855900cf2d2c6
Signed-off-by: Seth Howell <seth.howell@intel.com>
Reviewed-on: https://review.gerrithub.io/c/439431
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Chandler-Test-Pool: SPDK Automated Test System <sys_sgsw@intel.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Reviewed-by: Darek Stojaczyk <dariusz.stojaczyk@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>

lib/event/subsystems/nvmf/nvmf_rpc.c

@@ -1454,6 +1454,10 @@ static const struct spdk_json_object_decoder nvmf_rpc_create_transport_decoder[]
 		"num_shared_buffers", offsetof(struct nvmf_rpc_create_transport_ctx, opts.num_shared_buffers),
 		spdk_json_decode_uint32, true
 	},
+	{
+		"buf_cache_size", offsetof(struct nvmf_rpc_create_transport_ctx, opts.buf_cache_size),
+		spdk_json_decode_uint32, true
+	},
 };
 
 static void

scripts/rpc.py

@@ -1280,7 +1280,8 @@ Format: 'user:u1 secret:s1 muser:mu1 msecret:ms1,user:u2 secret:s2 muser:mu2 mse
                                        max_io_size=args.max_io_size,
                                        io_unit_size=args.io_unit_size,
                                        max_aq_depth=args.max_aq_depth,
-                                       num_shared_buffers=args.num_shared_buffers)
+                                       num_shared_buffers=args.num_shared_buffers,
+                                       buf_cache_size=args.buf_cache_size)
 
     p = subparsers.add_parser('nvmf_create_transport', help='Create NVMf transport')
     p.add_argument('-t', '--trtype', help='Transport type (ex. RDMA)', type=str, required=True)
@@ -1291,6 +1292,7 @@ Format: 'user:u1 secret:s1 muser:mu1 msecret:ms1,user:u2 secret:s2 muser:mu2 mse
     p.add_argument('-u', '--io-unit-size', help='I/O unit size (bytes)', type=int)
     p.add_argument('-a', '--max-aq-depth', help='Max number of admin cmds per AQ', type=int)
     p.add_argument('-n', '--num-shared-buffers', help='The number of pooled data buffers available to the transport', type=int)
+    p.add_argument('-b', '--buf-cache-size', help='The number of shared buffers to cache per poll group', type=int)
     p.set_defaults(func=nvmf_create_transport)
 
     def get_nvmf_transports(args):

scripts/rpc/nvmf.py

@@ -82,7 +82,8 @@ def nvmf_create_transport(client,
                           max_io_size=None,
                           io_unit_size=None,
                           max_aq_depth=None,
-                          num_shared_buffers=None):
+                          num_shared_buffers=None,
+                          buf_cache_size=None):
     """NVMf Transport Create options.
 
     Args:
@@ -94,6 +95,7 @@ def nvmf_create_transport(client,
         io_unit_size: I/O unit size in bytes (optional)
         max_aq_depth: Max size admin quque per controller (optional)
         num_shared_buffers: The number of pooled data buffers available to the transport (optional)
+        buf_cache_size: The number of shared buffers to cache per poll group (optional)
 
     Returns:
         True or False
@@ -115,6 +117,8 @@ def nvmf_create_transport(client,
         params['max_aq_depth'] = max_aq_depth
     if num_shared_buffers:
         params['num_shared_buffers'] = num_shared_buffers
+    if buf_cache_size:
+        params['buf_cache_size'] = buf_cache_size
     return client.call('nvmf_create_transport', params)