Update TPUExtractHeadTailOutsideCompilation pass to support tail outside compiled computation extraction.
This extends the pass to lift ops to after the cluster if they are outside compiled and have no dependencies, other than other ops that are to be lifted. PiperOrigin-RevId: 313877620 Change-Id: Ia5d068d74383206dc6ffaed06f429b7b93767271
This commit is contained in:
Andy Ly
TensorFlower Gardener
parent
481aec85d6
commit
00f027a374
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@ -157,4 +157,232 @@ module attributes {tf.versions = {producer = 888 : i32}, tf.devices = ["/job:wor
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}
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return
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}
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// CHECK-LABEL: func @tail_single_outside_compiled_op
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func @tail_single_outside_compiled_op() {
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// CHECK: %[[CLUSTER_OUT:.*]] = "tf_device.cluster"
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// CHECK-NEXT: %[[A_OUT:.*]] = "tf.A"
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// CHECK-NEXT: "tf.C"
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// CHECK-NEXT: tf_device.return %[[A_OUT]]
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// CHECK-NEXT: {
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// CHECK-DAG: num_cores_per_replica = 1
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// CHECK-DAG: step_marker_location = ""
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// CHECK-DAG: padding_map = []
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// CHECK-DAG: topology = ""
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// CHECK-DAG: device_assignment = []
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//
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// CHECK: "tf_device.launch"
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// CHECK-NEXT: "tf.B"(%[[CLUSTER_OUT]])
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// CHECK-NEXT: tf_device.return
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// CHECK-NEXT: device = "/job:worker/replica:0/task:0/device:CPU:0"
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"tf_device.cluster"() ( {
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%a = "tf.A"() : () -> tensor<i32>
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"tf.B"(%a) {_xla_outside_compilation = "cluster1"} : (tensor<i32>) -> ()
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"tf.C"() : () -> ()
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tf_device.return
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}) {num_cores_per_replica = 1, step_marker_location = "", padding_map = [], topology = "", device_assignment = []} : () -> ()
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return
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}
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// CHECK-LABEL: func @tail_single_outside_compiled_op_user
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func @tail_single_outside_compiled_op_user() -> tensor<i32> {
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// CHECK: %[[CLUSTER_OUT:.*]] = "tf_device.cluster"
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// CHECK-NEXT: %[[A_OUT:.*]] = "tf.A"
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// CHECK-NEXT: "tf.C"
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// CHECK-NEXT: tf_device.return %[[A_OUT]]
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// CHECK-NEXT: {
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// CHECK-DAG: num_cores_per_replica = 1
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// CHECK-DAG: step_marker_location = ""
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// CHECK-DAG: padding_map = []
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// CHECK-DAG: topology = ""
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// CHECK-DAG: device_assignment = []
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//
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// CHECK: %[[LAUNCH_OUT:.*]] = "tf_device.launch"
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// CHECK-NEXT: %[[B_OUT:.*]] = "tf.B"(%[[CLUSTER_OUT]])
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// CHECK-NEXT: tf_device.return %[[B_OUT]]
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// CHECK-NEXT: device = "/job:worker/replica:0/task:0/device:CPU:0"
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%cluster = "tf_device.cluster"() ( {
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%a = "tf.A"() : () -> tensor<i32>
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%b = "tf.B"(%a) {_xla_outside_compilation = "cluster1"} : (tensor<i32>) -> tensor<i32>
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"tf.C"() : () -> ()
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tf_device.return %b : tensor<i32>
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}) {num_cores_per_replica = 1, step_marker_location = "", padding_map = [], topology = "", device_assignment = []} : () -> tensor<i32>
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// CHECK: return %[[LAUNCH_OUT]]
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return %cluster : tensor<i32>
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}
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// CHECK-LABEL: func @tail_multiple_outside_compiled_ops
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func @tail_multiple_outside_compiled_ops(%arg0: tensor<i32>) {
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// CHECK: %[[CLUSTER_OUT:.*]]:2 = "tf_device.cluster"
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// CHECK-NEXT: %[[A_OUT:.*]] = "tf.A"
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// CHECK-NEXT: %[[B_OUT:.*]] = "tf.B"
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// CHECK-NEXT: tf_device.return %[[B_OUT]], %[[A_OUT]]
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// CHECK-NEXT: {
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// CHECK-DAG: num_cores_per_replica = 1
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// CHECK-DAG: step_marker_location = ""
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// CHECK-DAG: padding_map = []
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// CHECK-DAG: topology = ""
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// CHECK-DAG: device_assignment = []
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//
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// CHECK: "tf_device.launch"
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// CHECK-NEXT: %[[C_OUT:.*]] = "tf.C"(%arg0, %[[CLUSTER_OUT]]#1)
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// CHECK-NEXT: "tf.D"(%[[C_OUT]], %arg0, %[[CLUSTER_OUT]]#0)
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// CHECK-NEXT: tf_device.return
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// CHECK-NEXT: device = "/job:worker/replica:0/task:0/device:CPU:0"
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"tf_device.cluster"() ( {
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%a = "tf.A"() : () -> tensor<i32>
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%b = "tf.B"(%arg0) : (tensor<i32>) -> tensor<i32>
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%c = "tf.C"(%arg0, %a) {_xla_outside_compilation = "cluster1"} : (tensor<i32>, tensor<i32>) -> tensor<i32>
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"tf.D"(%c, %arg0, %b) {_xla_outside_compilation = "cluster1"} : (tensor<i32>, tensor<i32>, tensor<i32>) -> ()
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tf_device.return
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}) {num_cores_per_replica = 1, step_marker_location = "", padding_map = [], topology = "", device_assignment = []} : () -> ()
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return
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}
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// CHECK-LABEL: func @tail_aliased_output
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func @tail_aliased_output() -> (tensor<i32>, tensor<i32>, tensor<i32>, tensor<i32>, tensor<i32>) {
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// CHECK-NEXT: %[[A_OUT:.*]] = "tf.A"
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%a = "tf.A"() : () -> tensor<i32>
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// CHECK-NEXT: %[[B_OUT:.*]] = "tf.B"
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%b = "tf.B"() : () -> tensor<i32>
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// CHECK: %[[CLUSTER_OUT:.*]]:2 = "tf_device.cluster"
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// CHECK-NEXT: %[[C_OUT:.*]] = "tf.C"
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// CHECK-NEXT: %[[E_OUT:.*]] = "tf.E"
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// CHECK-NEXT: tf_device.return %[[C_OUT]], %[[E_OUT]]
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// CHECK-NEXT: {
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// CHECK-DAG: num_cores_per_replica = 1
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// CHECK-DAG: step_marker_location = ""
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// CHECK-DAG: padding_map = []
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// CHECK-DAG: topology = ""
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// CHECK-DAG: device_assignment = []
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//
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// CHECK: %[[LAUNCH_OUT:.*]] = "tf_device.launch"
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// CHECK-NEXT: %[[D_OUT:.*]] = "tf.D"(%[[CLUSTER_OUT]]#0, %[[A_OUT]])
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// CHECK-NEXT: tf_device.return
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// CHECK-NEXT: device = "/job:worker/replica:0/task:0/device:CPU:0"
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%cluster:5 = "tf_device.cluster"() ( {
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%c = "tf.C"() : () -> tensor<i32>
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%d = "tf.D"(%c, %a) {_xla_outside_compilation = "cluster1"} : (tensor<i32>, tensor<i32>) -> tensor<i32>
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%e = "tf.E"() : () -> tensor<i32>
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tf_device.return %a, %b, %c, %d, %e : tensor<i32>, tensor<i32>, tensor<i32>, tensor<i32>, tensor<i32>
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}) {num_cores_per_replica = 1, step_marker_location = "", padding_map = [], topology = "", device_assignment = []} : () -> (tensor<i32>, tensor<i32>, tensor<i32>, tensor<i32>, tensor<i32>)
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// CHECK: return %[[A_OUT]], %[[B_OUT]], %[[CLUSTER_OUT]]#0, %[[LAUNCH_OUT]], %[[CLUSTER_OUT]]#1
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return %cluster#0, %cluster#1, %cluster#2, %cluster#3, %cluster#4 : tensor<i32>, tensor<i32>, tensor<i32>, tensor<i32>, tensor<i32>
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}
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// CHECK-LABEL: func @tail_replicated_outside_compilation
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func @tail_replicated_outside_compilation(%arg0: tensor<i32>, %arg1: tensor<i32>) {
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// CHECK: tf_device.replicate([%arg0, %arg1] as %[[RI:.*]]: tensor<i32>)
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//
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// CHECK: %[[CLUSTER_OUT:.*]] = "tf_device.cluster"
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// CHECK-NEXT: %[[A_OUT:.*]] = "tf.A"(%[[RI]])
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// CHECK-NEXT: tf_device.return %[[A_OUT]]
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// CHECK-NEXT: {
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// CHECK-DAG: num_cores_per_replica = 1
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// CHECK-DAG: step_marker_location = ""
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// CHECK-DAG: padding_map = []
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// CHECK-DAG: topology = ""
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// CHECK-DAG: device_assignment = []
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//
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// CHECK-NEXT: "tf_device.launch"()
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// CHECK-NEXT: %[[B_OUT:.*]] = "tf.B"(%[[CLUSTER_OUT]], %[[RI]])
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// CHECK-NEXT: tf_device.return
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// CHECK-NEXT: device = "TPU_REPLICATED_HOST"
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tf_device.replicate([%arg0, %arg1] as %ri : tensor<i32>) {n = 2 : i32} {
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"tf_device.cluster"() ( {
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%a = "tf.A"(%ri) : (tensor<i32>) -> tensor<i32>
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%b = "tf.B"(%a, %ri) {_xla_outside_compilation = "cluster1"} : (tensor<i32>, tensor<i32>) -> tensor<i32>
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tf_device.return
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}) {num_cores_per_replica = 1, step_marker_location = "", padding_map = [], topology = "", device_assignment = []} : () -> ()
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tf_device.return
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}
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return
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}
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// CHECK-LABEL: func @head_tail_no_extraction_middle_outside_compiled_ops
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func @head_tail_no_extraction_middle_outside_compiled_ops(%arg0: tensor<i32>) {
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// CHECK-NOT: "tf_device.launch"
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// CHECK: "tf_device.cluster"
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// CHECK-NEXT: "tf.A"
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// CHECK-NEXT: "tf.B"
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// CHECK-NEXT: "tf.C"
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// CHECK-NEXT: tf_device.return
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"tf_device.cluster"() ( {
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%a = "tf.A"(%arg0) : (tensor<i32>) -> tensor<i32>
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%b = "tf.B"(%a) {_xla_outside_compilation = "cluster1"} : (tensor<i32>) -> tensor<i32>
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"tf.C"(%b) : (tensor<i32>) -> ()
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tf_device.return
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}) {num_cores_per_replica = 1, step_marker_location = "", padding_map = [], topology = "", device_assignment = []} : () -> ()
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return
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}
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// CHECK-LABEL: func @head_tail_simple_extraction
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func @head_tail_simple_extraction(%arg0: tensor<i32>) -> tensor<i32> {
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// CHECK: %[[HEAD_LAUNCH_OUT:.*]] = "tf_device.launch"
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// CHECK-NEXT: %[[A_OUT:.*]] = "tf.A"(%arg0)
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// CHECK-NEXT: tf_device.return %[[A_OUT]]
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// CHECK-NEXT: device = "/job:worker/replica:0/task:0/device:CPU:0"
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//
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// CHECK: %[[CLUSTER_OUT:.*]] = "tf_device.cluster"
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// CHECK-NEXT: %[[B_OUT:.*]] = "tf.B"(%[[HEAD_LAUNCH_OUT]])
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// CHECK-NEXT: tf_device.return %[[B_OUT]]
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// CHECK-NEXT: {
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// CHECK-DAG: num_cores_per_replica = 1
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// CHECK-DAG: step_marker_location = ""
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// CHECK-DAG: padding_map = []
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// CHECK-DAG: topology = ""
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// CHECK-DAG: device_assignment = []
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//
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// CHECK: %[[TAIL_LAUNCH_OUT:.*]] = "tf_device.launch"
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// CHECK-NEXT: %[[C_OUT:.*]] = "tf.C"(%[[CLUSTER_OUT]])
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// CHECK-NEXT: tf_device.return %[[C_OUT]]
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// CHECK-NEXT: device = "/job:worker/replica:0/task:0/device:CPU:0"
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%cluster = "tf_device.cluster"() ( {
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%a = "tf.A"(%arg0) {_xla_outside_compilation = "cluster1"} : (tensor<i32>) -> tensor<i32>
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%b = "tf.B"(%a) : (tensor<i32>) -> tensor<i32>
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%c = "tf.C"(%b) {_xla_outside_compilation = "cluster1"} : (tensor<i32>) -> tensor<i32>
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tf_device.return %c : tensor<i32>
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}) {num_cores_per_replica = 1, step_marker_location = "", padding_map = [], topology = "", device_assignment = []} : () -> tensor<i32>
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// CHECK: return %[[TAIL_LAUNCH_OUT]]
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return %cluster : tensor<i32>
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}
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// CHECK-LABEL: func @head_tail_replicated_outside_compilation
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func @head_tail_replicated_outside_compilation(%arg0: tensor<i32>, %arg1: tensor<i32>) {
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// CHECK: tf_device.replicate([%arg0, %arg1] as %[[RI:.*]]: tensor<i32>)
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//
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// CHECK-NEXT: %[[HEAD_LAUNCH_OUT:.*]] = "tf_device.launch"()
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// CHECK-NEXT: %[[A_OUT:.*]] = "tf.A"(%[[RI]])
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// CHECK-NEXT: tf_device.return %[[A_OUT]]
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// CHECK-NEXT: device = "TPU_REPLICATED_HOST"
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//
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// CHECK: %[[CLUSTER_OUT:.*]] = "tf_device.cluster"
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// CHECK-NEXT: %[[B_OUT:.*]] = "tf.B"
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// CHECK-NEXT: %[[C_OUT:.*]] = "tf.C"(%[[RI]], %[[B_OUT]])
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// CHECK-NEXT: "tf.E"(%[[C_OUT]], %[[HEAD_LAUNCH_OUT]])
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// CHECK-NEXT: tf_device.return %[[C_OUT]]
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// CHECK-NEXT: {
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// CHECK-DAG: num_cores_per_replica = 1
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// CHECK-DAG: step_marker_location = ""
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// CHECK-DAG: padding_map = []
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// CHECK-DAG: topology = ""
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// CHECK-DAG: device_assignment = []
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//
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// CHECK-NEXT: "tf_device.launch"()
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// CHECK-NEXT: "tf.D"(%[[HEAD_LAUNCH_OUT]], %[[CLUSTER_OUT]], %[[RI]])
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// CHECK-NEXT: tf_device.return
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// CHECK-NEXT: device = "TPU_REPLICATED_HOST"
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tf_device.replicate([%arg0, %arg1] as %ri : tensor<i32>) {n = 2 : i32} {
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"tf_device.cluster"() ( {
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%a = "tf.A"(%ri) {_xla_outside_compilation = "cluster1"} : (tensor<i32>) -> tensor<i32>
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%b = "tf.B"() : () -> tensor<i32>
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%c = "tf.C"(%ri, %b) {_xla_outside_compilation = "cluster1"} : (tensor<i32>, tensor<i32>) -> tensor<i32>
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%d = "tf.D"(%a, %c, %ri) {_xla_outside_compilation = "cluster1"} : (tensor<i32>, tensor<i32>, tensor<i32>) -> tensor<i32>
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%e = "tf.E"(%c, %a) : (tensor<i32>, tensor<i32>) -> tensor<i32>
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tf_device.return
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}) {num_cores_per_replica = 1, step_marker_location = "", padding_map = [], topology = "", device_assignment = []} : () -> ()
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tf_device.return
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}
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return
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}
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}
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@ -78,9 +78,11 @@ bool OpInBlock(Operation* op, Block* block) {
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}
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// Wraps block in a Launch. External uses of ops in the block will be return
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// values of the Launch and remapped to the Launch results.
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// values of the Launch and remapped to the Launch results. If `before` is set
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// to true, the Launch is created before `op`. Otherwise the Launch is created
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// after `op`.
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tf_device::LaunchOp CreateLaunchForBlock(OpBuilder* builder, Operation* op,
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Block* launch_block,
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bool before, Block* launch_block,
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llvm::StringRef host_device) {
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// Find results and result types of ops in block that needs to returned.
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llvm::SmallVector<Value, 4> launch_results;
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@ -100,7 +102,7 @@ tf_device::LaunchOp CreateLaunchForBlock(OpBuilder* builder, Operation* op,
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}
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}
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builder->setInsertionPoint(op);
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before ? builder->setInsertionPoint(op) : builder->setInsertionPointAfter(op);
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auto launch = builder->create<tf_device::LaunchOp>(
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op->getLoc(), builder->getStringAttr(host_device), launch_result_types);
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launch.body().push_back(launch_block);
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@ -178,7 +180,12 @@ llvm::SmallVector<Operation*, 4> FindOutsideCompiledOpsAtHead(
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Region* cluster_region = &cluster.body();
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llvm::SmallSetVector<Operation*, 4> head_outside_compiled_ops;
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auto walk_operands = [&](Operation* op) {
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auto cluster_ops = cluster.GetBody().without_terminator();
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for (Operation& cluster_op : cluster_ops) {
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if (!HasOutsideCompilationAttribute(&cluster_op)) continue;
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// An outside compiled op can be extracted if its operands are not from
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// other ops in the cluster that cannot be extracted.
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auto walk_result = cluster_op.walk([&](Operation* op) {
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for (Value operand : op->getOperands()) {
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Operation* operand_op = GetOpOfValue(operand);
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if (head_outside_compiled_ops.count(operand_op)) continue;
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@ -187,13 +194,7 @@ llvm::SmallVector<Operation*, 4> FindOutsideCompiledOpsAtHead(
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return WalkResult::interrupt();
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}
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return WalkResult::advance();
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};
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auto cluster_ops = cluster.GetBody().without_terminator();
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for (Operation& cluster_op : cluster_ops) {
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if (!HasOutsideCompilationAttribute(&cluster_op)) continue;
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// An outside compiled op can be extracted if its operands are not from
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// other ops in the cluster that cannot be extracted.
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auto walk_result = cluster_op.walk(walk_operands);
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});
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if (!walk_result.wasInterrupted())
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head_outside_compiled_ops.insert(&cluster_op);
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@ -211,8 +212,8 @@ void CreateHeadComputation(OpBuilder* builder, tf_device::ClusterOp cluster,
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for (Operation* head_outside_compiled_op : head_outside_compiled_ops)
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head_outside_compiled_op->moveBefore(launch_block, launch_block->end());
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tf_device::LaunchOp launch =
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CreateLaunchForBlock(builder, cluster, launch_block, host_device);
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tf_device::LaunchOp launch = CreateLaunchForBlock(
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builder, cluster, /*before=*/true, launch_block, host_device);
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for (auto result : llvm::zip(launch.GetBody().getTerminator()->getOperands(),
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launch.getResults()))
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@ -220,6 +221,160 @@ void CreateHeadComputation(OpBuilder* builder, tf_device::ClusterOp cluster,
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cluster.body());
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}
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// Extracts and move outside compiled ops that have no dependencies in the
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// cluster to before the cluster.
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mlir::LogicalResult LiftHeadOutsideCompiledOps(
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OpBuilder* builder, const mlir::TF::RuntimeDevices& devices,
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tf_device::ClusterOp cluster, std::string* host_device,
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bool* cluster_updated) {
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llvm::SmallVector<Operation*, 4> head_outside_compiled_ops =
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FindOutsideCompiledOpsAtHead(cluster);
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if (head_outside_compiled_ops.empty()) return success();
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if (failed(
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GetHostDeviceForHeadTailComputation(devices, cluster, host_device)))
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return failure();
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CreateHeadComputation(builder, cluster, head_outside_compiled_ops,
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*host_device);
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*cluster_updated = true;
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return success();
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}
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// Fills `tail_outside_compiled_ops` with ops that are outside compiled and
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// can be extracted to after the TPU computation, and `cluster_results` with new
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// results of the cluster. These ops are either connected to the output of the
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// TPU computation or other ops that can be extracted, and have no results used
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// by other ops in the TPU computation that cannot be extracted.
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void FindOutsideCompiledOpsAtTailAndClusterResults(
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tf_device::ClusterOp cluster,
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llvm::SmallVectorImpl<Operation*>* tail_outside_compiled_ops,
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llvm::SmallVectorImpl<Value>* cluster_results) {
|
||||
Region* cluster_region = &cluster.body();
|
||||
llvm::SmallSetVector<Operation*, 4> tail_outside_compiled_ops_set;
|
||||
Operation* terminator = cluster.GetBody().getTerminator();
|
||||
llvm::SmallSetVector<Value, 4> cluster_results_set;
|
||||
cluster_results_set.insert(terminator->getOperands().begin(),
|
||||
terminator->getOperands().end());
|
||||
|
||||
auto cluster_ops = llvm::reverse(cluster.GetBody().without_terminator());
|
||||
for (Operation& cluster_op : cluster_ops) {
|
||||
if (!HasOutsideCompilationAttribute(&cluster_op)) continue;
|
||||
|
||||
llvm::SmallVector<int, 4> results_to_forward;
|
||||
bool can_be_extracted =
|
||||
llvm::all_of(cluster_op.getUsers(), [&](Operation* op) {
|
||||
return op == terminator || tail_outside_compiled_ops_set.count(op);
|
||||
});
|
||||
if (!can_be_extracted) continue;
|
||||
|
||||
// Collect operands of cluster op that are generated within the cluster.
|
||||
// These values should be returned by the cluster.
|
||||
cluster_op.walk([&](Operation* op) {
|
||||
for (Value operand : op->getOperands()) {
|
||||
Operation* operand_op = GetOpOfValue(operand);
|
||||
if (operand_op->getParentRegion() == cluster_region)
|
||||
cluster_results_set.insert(operand);
|
||||
}
|
||||
});
|
||||
|
||||
// Remove results of op to be extracted as there are no uses in the cluster.
|
||||
for (Value result : cluster_op.getResults())
|
||||
cluster_results_set.remove(result);
|
||||
tail_outside_compiled_ops_set.insert(&cluster_op);
|
||||
}
|
||||
|
||||
*tail_outside_compiled_ops = tail_outside_compiled_ops_set.takeVector();
|
||||
*cluster_results = cluster_results_set.takeVector();
|
||||
}
|
||||
|
||||
// Moves tail outside compiled ops into its own `tf_device.LaunchOp`
|
||||
// computation after the cluster.
|
||||
void CreateTailComputation(OpBuilder* builder, tf_device::ClusterOp cluster,
|
||||
llvm::ArrayRef<Operation*> tail_outside_compiled_ops,
|
||||
llvm::StringRef host_device) {
|
||||
Block* launch_block = new Block;
|
||||
for (Operation* tail_outside_compiled_op : tail_outside_compiled_ops)
|
||||
tail_outside_compiled_op->moveBefore(launch_block, launch_block->begin());
|
||||
|
||||
tf_device::LaunchOp launch = CreateLaunchForBlock(
|
||||
builder, cluster, /*before=*/false, launch_block, host_device);
|
||||
|
||||
auto operand_not_in_launch = [&](OpOperand& operand) {
|
||||
return !launch.getOperation()->isProperAncestor(operand.getOwner());
|
||||
};
|
||||
for (auto result : llvm::zip(launch.GetBody().getTerminator()->getOperands(),
|
||||
launch.getResults()))
|
||||
std::get<0>(result).replaceUsesWithIf(std::get<1>(result),
|
||||
operand_not_in_launch);
|
||||
}
|
||||
|
||||
// Updates cluster with updated cluster results after extracting tail outside
|
||||
// compiled ops.
|
||||
tf_device::ClusterOp UpdateClusterResults(
|
||||
OpBuilder* builder, tf_device::ClusterOp cluster,
|
||||
llvm::ArrayRef<Value> new_cluster_results) {
|
||||
Operation* old_terminator = cluster.GetBody().getTerminator();
|
||||
builder->setInsertionPoint(old_terminator);
|
||||
builder->create<tf_device::ReturnOp>(old_terminator->getLoc(),
|
||||
new_cluster_results);
|
||||
old_terminator->erase();
|
||||
|
||||
builder->setInsertionPoint(cluster);
|
||||
llvm::SmallVector<Type, 4> new_cluster_result_types;
|
||||
new_cluster_result_types.reserve(new_cluster_results.size());
|
||||
for (const auto& new_cluster_result : new_cluster_results)
|
||||
new_cluster_result_types.push_back(new_cluster_result.getType());
|
||||
|
||||
auto new_cluster = builder->create<tf_device::ClusterOp>(
|
||||
cluster.getLoc(), new_cluster_result_types,
|
||||
/*operands=*/llvm::ArrayRef<Value>{}, cluster.getAttrs());
|
||||
new_cluster.body().takeBody(cluster.body());
|
||||
|
||||
auto operand_not_in_cluster = [&](OpOperand& operand) {
|
||||
return !new_cluster.getOperation()->isProperAncestor(operand.getOwner());
|
||||
};
|
||||
for (auto result :
|
||||
llvm::zip(new_cluster.GetBody().getTerminator()->getOperands(),
|
||||
new_cluster.getResults()))
|
||||
std::get<0>(result).replaceUsesWithIf(std::get<1>(result),
|
||||
operand_not_in_cluster);
|
||||
|
||||
cluster.erase();
|
||||
return new_cluster;
|
||||
}
|
||||
|
||||
// Extracts and move outside compiled ops that do not create dependencies in the
|
||||
// cluster to after the cluster.
|
||||
mlir::LogicalResult LiftTailOutsideCompiledOps(
|
||||
OpBuilder* builder, const mlir::TF::RuntimeDevices& devices,
|
||||
std::string host_device, tf_device::ClusterOp* cluster,
|
||||
bool* cluster_updated) {
|
||||
llvm::SmallVector<Operation*, 4> tail_outside_compiled_ops;
|
||||
llvm::SmallVector<Value, 4> cluster_results;
|
||||
FindOutsideCompiledOpsAtTailAndClusterResults(
|
||||
*cluster, &tail_outside_compiled_ops, &cluster_results);
|
||||
if (tail_outside_compiled_ops.empty()) return success();
|
||||
|
||||
if (host_device.empty())
|
||||
if (failed(GetHostDeviceForHeadTailComputation(devices, *cluster,
|
||||
&host_device)))
|
||||
return failure();
|
||||
|
||||
// Forward all results of cluster first. These results will be remapped once
|
||||
// a new cluster is formed.
|
||||
cluster->replaceAllUsesWith(
|
||||
cluster->GetBody().getTerminator()->getOperands());
|
||||
|
||||
CreateTailComputation(builder, *cluster, tail_outside_compiled_ops,
|
||||
host_device);
|
||||
|
||||
*cluster = UpdateClusterResults(builder, *cluster, cluster_results);
|
||||
|
||||
*cluster_updated = true;
|
||||
return success();
|
||||
}
|
||||
|
||||
// Removes aliased outputs in cluster from ops outside of cluster.
|
||||
void RemoveClusterAliasedOutputs(OpBuilder* builder,
|
||||
tf_device::ClusterOp cluster) {
|
||||
|
|
@ -256,26 +411,6 @@ void RemoveClusterAliasedOutputs(OpBuilder* builder,
|
|||
cluster.erase();
|
||||
}
|
||||
|
||||
// Extracts and move outside compiled ops that have no dependencies in the
|
||||
// cluster to before the cluster.
|
||||
mlir::LogicalResult LiftHeadOutsideCompiledOps(
|
||||
OpBuilder* builder, const mlir::TF::RuntimeDevices& devices,
|
||||
tf_device::ClusterOp cluster) {
|
||||
llvm::SmallVector<Operation*, 4> head_outside_compiled_ops =
|
||||
FindOutsideCompiledOpsAtHead(cluster);
|
||||
if (head_outside_compiled_ops.empty()) return success();
|
||||
std::string host_device;
|
||||
if (failed(
|
||||
GetHostDeviceForHeadTailComputation(devices, cluster, &host_device)))
|
||||
return failure();
|
||||
|
||||
CreateHeadComputation(builder, cluster, head_outside_compiled_ops,
|
||||
host_device);
|
||||
|
||||
RemoveClusterAliasedOutputs(builder, cluster);
|
||||
return success();
|
||||
}
|
||||
|
||||
struct TPUExtractHeadTailOutsideCompilation
|
||||
: public PassWrapper<TPUExtractHeadTailOutsideCompilation,
|
||||
OperationPass<ModuleOp>> {
|
||||
|
|
@ -295,10 +430,14 @@ void TPUExtractHeadTailOutsideCompilation::runOnOperation() {
|
|||
[&](tf_device::ClusterOp cluster) { clusters.push_back(cluster); });
|
||||
|
||||
for (tf_device::ClusterOp cluster : clusters) {
|
||||
if (failed(LiftHeadOutsideCompiledOps(&builder, devices, cluster)))
|
||||
std::string host_device;
|
||||
bool cluster_updated = false;
|
||||
if (failed(LiftHeadOutsideCompiledOps(&builder, devices, cluster,
|
||||
&host_device, &cluster_updated)) ||
|
||||
failed(LiftTailOutsideCompiledOps(&builder, devices, host_device,
|
||||
&cluster, &cluster_updated)))
|
||||
return signalPassFailure();
|
||||
|
||||
// TODO(b/157160906): Implement tail outside compiled op extraction.
|
||||
if (cluster_updated) RemoveClusterAliasedOutputs(&builder, cluster);
|
||||
}
|
||||
}
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue