gpu: add metrics collector and related types (#2052) (#2059)

internal/collector/gpu/utils.go

@@ -0,0 +1,84 @@
+// SPDX-License-Identifier: Apache-2.0
+//
+// Copyright The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+//go:build windows
+
+package gpu
+
+import (
+	"strings"
+)
+
+type Instance struct {
+	Pid     string
+	Luid    [2]string
+	Phys    string
+	Eng     string
+	Engtype string
+	Part    string
+}
+
+type PidPhys struct {
+	Pid  string
+	Phys string
+}
+
+type PidPhysEngEngType struct {
+	Pid     string
+	Phys    string
+	Eng     string
+	Engtype string
+}
+
+func parseGPUCounterInstanceString(s string) Instance {
+	// Example: "pid_1234_luid_0x00000000_0x00005678_phys_0_eng_0_engtype_3D"
+	// Example: "luid_0x00000000_0x00005678_phys_0"
+	// Example: "luid_0x00000000_0x00005678_phys_0_part_0"
+	parts := strings.Split(s, "_")
+
+	var instance Instance
+
+	for i, part := range parts {
+		switch part {
+		case "pid":
+			if i+1 < len(parts) {
+				instance.Pid = parts[i+1]
+			}
+		case "luid":
+			if i+2 < len(parts) {
+				instance.Luid[0] = parts[i+1]
+				instance.Luid[1] = parts[i+2]
+			}
+		case "phys":
+			if i+1 < len(parts) {
+				instance.Phys = parts[i+1]
+			}
+		case "eng":
+			if i+1 < len(parts) {
+				instance.Eng = parts[i+1]
+			}
+		case "engtype":
+			if i+1 < len(parts) {
+				instance.Engtype = parts[i+1]
+			}
+		case "part":
+			if i+1 < len(parts) {
+				instance.Part = parts[i+1]
+			}
+		}
+	}
+
+	return instance
+}