memif: multiversioning

Change-Id: I881551e6c13503a71ae29a7a58bde4d193745d55
Signed-off-by: Damjan Marion <damarion@cisco.com>

3 files changed, 82 insertions, 19 deletions

diff --git a/src/plugins/memif.am b/src/plugins/memif.am
index 15147e77621..6e9aa779155 100644
--- a/src/plugins/memif.am
+++ b/src/plugins/memif.am
@@ -14,6 +14,7 @@
 vppplugins_LTLIBRARIES += memif_plugin.la
 vppapitestplugins_LTLIBRARIES += memif_test_plugin.la
 
+memif_plugin_la_LIBADD =
 memif_plugin_la_SOURCES = memif/memif.c   \
 	memif/memif_api.c                 \
 	memif/cli.c                       \
@@ -34,4 +35,34 @@ nobase_apiinclude_HEADERS +=              \
 
 API_FILES += memif/memif.api
 
+if CPU_X86_64
+memif_multiversioning_files = 					\
+	memif/node.c						\
+	memif/device.c
+
+if CC_SUPPORTS_AVX2
+###############################################################
+# AVX2
+###############################################################
+libmemif_plugin_avx2_la_SOURCES = $(memif_multiversioning_files)
+libmemif_plugin_avx2_la_CFLAGS =				\
+	$(AM_CFLAGS)  @CPU_AVX2_FLAGS@				\
+	-DCLIB_MULTIARCH_VARIANT=avx2
+noinst_LTLIBRARIES += libmemif_plugin_avx2.la
+memif_plugin_la_LIBADD += libmemif_plugin_avx2.la
+endif
+
+if CC_SUPPORTS_AVX512
+###############################################################
+# AVX512
+###############################################################
+libmemif_plugin_avx512_la_SOURCES = $(memif_multiversioning_files)
+libmemif_plugin_avx512_la_CFLAGS =				\
+	$(AM_CFLAGS) @CPU_AVX512_FLAGS@				\
+	-DCLIB_MULTIARCH_VARIANT=avx512
+noinst_LTLIBRARIES += libmemif_plugin_avx512.la
+memif_plugin_la_LIBADD += libmemif_plugin_avx512.la
+endif
+endif
+
 # vi:syntax=automake
diff --git a/src/plugins/memif/device.c b/src/plugins/memif/device.c
index 012c75327f1..fa3a4eda40d 100644
--- a/src/plugins/memif/device.c
+++ b/src/plugins/memif/device.c
@@ -42,12 +42,13 @@ typedef enum
     MEMIF_TX_N_ERROR,
 } memif_tx_func_error_t;
 
-static char *memif_tx_func_error_strings[] = {
+static __clib_unused char *memif_tx_func_error_strings[] = {
 #define _(n,s) s,
   foreach_memif_tx_func_error
 #undef _
 };
 
+#ifndef CLIB_MULTIARCH_VARIANT
 u8 *
 format_memif_device_name (u8 * s, va_list * args)
 {
@@ -58,8 +59,9 @@ format_memif_device_name (u8 * s, va_list * args)
   s = format (s, "memif%lu/%lu", mif->socket_file_index, mif->id);
   return s;
 }
+#endif
 
-static u8 *
+static __clib_unused u8 *
 format_memif_device (u8 * s, va_list * args)
 {
   u32 dev_instance = va_arg (*args, u32);
@@ -75,7 +77,7 @@ format_memif_device (u8 * s, va_list * args)
   return s;
 }
 
-static u8 *
+static __clib_unused u8 *
 format_memif_tx_trace (u8 * s, va_list * args)
 {
   s = format (s, "Unimplemented...");
@@ -256,9 +258,10 @@ error:
   return frame->n_vectors;
 }
 
-static uword
-memif_interface_tx (vlib_main_t * vm,
-		    vlib_node_runtime_t * node, vlib_frame_t * frame)
+uword
+CLIB_MULTIARCH_FN (memif_interface_tx) (vlib_main_t * vm,
+					vlib_node_runtime_t * node,
+					vlib_frame_t * frame)
 {
   memif_main_t *nm = &memif_main;
   vnet_interface_output_runtime_t *rund = (void *) node->runtime_data;
@@ -270,7 +273,7 @@ memif_interface_tx (vlib_main_t * vm,
     return memif_interface_tx_inline (vm, node, frame, mif, MEMIF_RING_M2S);
 }
 
-static void
+static __clib_unused void
 memif_set_interface_next_node (vnet_main_t * vnm, u32 hw_if_index,
 			       u32 node_index)
 {
@@ -289,13 +292,13 @@ memif_set_interface_next_node (vnet_main_t * vnm, u32 hw_if_index,
     vlib_node_add_next (vlib_get_main (), memif_input_node.index, node_index);
 }
 
-static void
+static __clib_unused void
 memif_clear_hw_interface_counters (u32 instance)
 {
   /* Nothing for now */
 }
 
-static clib_error_t *
+static __clib_unused clib_error_t *
 memif_interface_rx_mode_change (vnet_main_t * vnm, u32 hw_if_index, u32 qid,
 				vnet_hw_interface_rx_mode mode)
 {
@@ -312,7 +315,7 @@ memif_interface_rx_mode_change (vnet_main_t * vnm, u32 hw_if_index, u32 qid,
   return 0;
 }
 
-static clib_error_t *
+static __clib_unused clib_error_t *
 memif_interface_admin_up_down (vnet_main_t * vnm, u32 hw_if_index, u32 flags)
 {
   memif_main_t *mm = &memif_main;
@@ -328,7 +331,7 @@ memif_interface_admin_up_down (vnet_main_t * vnm, u32 hw_if_index, u32 flags)
   return error;
 }
 
-static clib_error_t *
+static __clib_unused clib_error_t *
 memif_subif_add_del_function (vnet_main_t * vnm,
 			      u32 hw_if_index,
 			      struct vnet_sw_interface_t *st, int is_add)
@@ -337,6 +340,7 @@ memif_subif_add_del_function (vnet_main_t * vnm,
   return 0;
 }
 
+#ifndef CLIB_MULTIARCH_VARIANT
 /* *INDENT-OFF* */
 VNET_DEVICE_CLASS (memif_device_class) = {
   .name = "memif",
@@ -353,8 +357,20 @@ VNET_DEVICE_CLASS (memif_device_class) = {
   .rx_mode_change_function = memif_interface_rx_mode_change,
 };
 
-VLIB_DEVICE_TX_FUNCTION_MULTIARCH(memif_device_class,
-				  memif_interface_tx)
+#if __x86_64__
+vlib_node_function_t __clib_weak memif_interface_tx_avx512;
+vlib_node_function_t __clib_weak memif_interface_tx_avx2;
+static void __clib_constructor
+dpdk_interface_tx_multiarch_select (void)
+{
+  if (memif_interface_tx_avx512 && clib_cpu_supports_avx512f ())
+    memif_device_class.tx_function = memif_interface_tx_avx512;
+  else if (memif_interface_tx_avx2 && clib_cpu_supports_avx2 ())
+    memif_device_class.tx_function = memif_interface_tx_avx2;
+}
+#endif
+#endif
+
 /* *INDENT-ON* */
 
 /*
diff --git a/src/plugins/memif/node.c b/src/plugins/memif/node.c
index 74b238931ac..1c34922d331 100644
--- a/src/plugins/memif/node.c
+++ b/src/plugins/memif/node.c
@@ -41,7 +41,7 @@ typedef enum
     MEMIF_INPUT_N_ERROR,
 } memif_input_error_t;
 
-static char *memif_input_error_strings[] = {
+static __clib_unused char *memif_input_error_strings[] = {
 #define _(n,s) s,
   foreach_memif_input_error
 #undef _
@@ -54,7 +54,7 @@ typedef struct
   u16 ring;
 } memif_input_trace_t;
 
-static u8 *
+static __clib_unused u8 *
 format_memif_input_trace (u8 * s, va_list * args)
 {
   CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
@@ -447,9 +447,10 @@ memif_device_input_inline (vlib_main_t * vm, vlib_node_runtime_t * node,
   return n_rx_packets;
 }
 
-static uword
-memif_input_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
-		vlib_frame_t * frame)
+uword
+CLIB_MULTIARCH_FN (memif_input_fn) (vlib_main_t * vm,
+				    vlib_node_runtime_t * node,
+				    vlib_frame_t * frame)
 {
   u32 n_rx = 0;
   memif_main_t *nm = &memif_main;
@@ -491,6 +492,7 @@ memif_input_fn (vlib_main_t * vm, vlib_node_runtime_t * node,
   return n_rx;
 }
 
+#ifndef CLIB_MULTIARCH_VARIANT
 /* *INDENT-OFF* */
 VLIB_REGISTER_NODE (memif_input_node) = {
   .function = memif_input_fn,
@@ -503,7 +505,21 @@ VLIB_REGISTER_NODE (memif_input_node) = {
   .error_strings = memif_input_error_strings,
 };
 
-VLIB_NODE_FUNCTION_MULTIARCH (memif_input_node, memif_input_fn)
+vlib_node_function_t __clib_weak memif_input_avx512;
+vlib_node_function_t __clib_weak memif_input_avx2;
+
+#if __x86_64__
+static void __clib_constructor
+memif_input_multiarch_select (void)
+{
+  if (memif_input_avx512 && clib_cpu_supports_avx512f ())
+    memif_input_node.function = memif_input_avx512;
+  else if (memif_input_avx2 && clib_cpu_supports_avx2 ())
+    memif_input_node.function = memif_input_avx2;
+}
+#endif
+#endif
+
 /* *INDENT-ON* */