hipfile/util: USDT (user statically-defined tracing) powered ais-stats.py

.clang-format-ignore

@@ -0,0 +1 @@
+./src/amd_detail/usdt.h

src/amd_detail/backend/fallback.cpp

@@ -11,6 +11,7 @@
 #include "hip.h"
 #include "io.h"
 #include "sys.h"
+#include "trace.h"
 
 #include <algorithm>
 #include <cerrno>
@@ -118,6 +119,6 @@ Fallback::io(IoType io_type, shared_ptr<IFile> file, shared_ptr<IBuffer> buffer,
             break;
         }
     } while (static_cast<size_t>(total_io_bytes) < size);
-
+    USDT_HIPFILE(posix_io, static_cast<unsigned long>(io_type), total_io_bytes);
     return total_io_bytes;
 }

src/amd_detail/backend/fastpath.cpp

@@ -9,6 +9,7 @@
 #include "file.h"
 #include "hip.h"
 #include "hipfile.h"
+#include "trace.h"
 #include "io.h"
 
 #include <cstdint>
@@ -187,6 +188,6 @@ Fastpath::io(IoType type, shared_ptr<IFile> file, shared_ptr<IBuffer> buffer, si
         default:
             throw std::runtime_error("Invalid IoType");
     }
-
+    USDT_HIPFILE(ais_io, static_cast<unsigned long>(type), nbytes);
     return static_cast<ssize_t>(nbytes);
 }

src/amd_detail/trace.h

@@ -0,0 +1,10 @@
+/* Copyright (c) Advanced Micro Devices, Inc. All rights reserved.
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+#pragma once
+
+#include "usdt.h"
+
+#define USDT_HIPFILE(...) USDT(hipfile, __VA_ARGS__)