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https://gitlab.freedesktop.org/wayland/weston.git
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bdfe7a3e58
This borrows heavily from the Mesa project's perfetto instrumentation, and for now just adds perfetto to the build and a collection of useful macros for adding trace points. The atomics have been cargo culted in - Weston currently has no need of such things, but I guess they're harmless for now and could be useful if we consider threads in the future. Signed-off-by: Derek Foreman <derek.foreman@collabora.com>
145 lines
4.9 KiB
C
145 lines
4.9 KiB
C
/*
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* Copyright 2022 Google LLC
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* SPDX-License-Identifier: MIT
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*/
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/* This code was taken from the Mesa project, and heavily modified to
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* suit weston's needs.
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*/
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#ifndef WESTON_TRACE_H
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#define WESTON_TRACE_H
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#include "perfetto/u_perfetto.h"
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#if defined(HAVE_PERFETTO)
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#if !defined(HAVE___BUILTIN_EXPECT)
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# define __builtin_expect(x, y) (x)
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#endif
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#ifndef likely
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# ifdef HAVE___BUILTIN_EXPECT
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# define likely(x) __builtin_expect(!!(x), 1)
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# define unlikely(x) __builtin_expect(!!(x), 0)
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# else
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# define likely(x) (x)
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# define unlikely(x) (x)
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# endif
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#endif
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/* note that util_perfetto_is_tracing_enabled always returns false until
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* util_perfetto_init is called
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*/
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#define _WESTON_TRACE_BEGIN(name) \
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do { \
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if (unlikely(util_perfetto_is_tracing_enabled())) \
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util_perfetto_trace_begin(name); \
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} while (0)
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#define _WESTON_TRACE_FLOW_BEGIN(name, id) \
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do { \
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if (unlikely(util_perfetto_is_tracing_enabled())) \
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util_perfetto_trace_begin_flow(name, id); \
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} while (0)
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#define _WESTON_TRACE_END() \
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do { \
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if (unlikely(util_perfetto_is_tracing_enabled())) \
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util_perfetto_trace_end(); \
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} while (0)
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#define _WESTON_TRACE_SET_COUNTER(name, value) \
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do { \
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if (unlikely(util_perfetto_is_tracing_enabled())) \
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util_perfetto_counter_set(name, value); \
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} while (0)
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#define _WESTON_TRACE_TIMESTAMP_BEGIN(name, track_id, flow_id, clock, timestamp) \
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do { \
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if (unlikely(util_perfetto_is_tracing_enabled())) \
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util_perfetto_trace_full_begin(name, track_id, flow_id, \
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clock, timestamp); \
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} while (0)
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#define _WESTON_TRACE_TIMESTAMP_END(name, track_id, clock, timestamp) \
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do { \
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if (unlikely(util_perfetto_is_tracing_enabled())) \
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util_perfetto_trace_full_end(name, track_id, \
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clock, timestamp); \
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} while (0)
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#if __has_attribute(cleanup) && __has_attribute(unused)
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#define _WESTON_TRACE_SCOPE_VAR_CONCAT(name, suffix) name##suffix
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#define _WESTON_TRACE_SCOPE_VAR(suffix) \
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_WESTON_TRACE_SCOPE_VAR_CONCAT(_weston_trace_scope_, suffix)
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/* This must expand to a single non-scoped statement for
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*
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* if (cond)
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* _WESTON_TRACE_SCOPE(...)
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*
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* to work.
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*/
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#define _WESTON_TRACE_SCOPE(name) \
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int _WESTON_TRACE_SCOPE_VAR(__LINE__) \
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__attribute__((cleanup(_weston_trace_scope_end), unused)) = \
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_weston_trace_scope_begin(name)
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#define _WESTON_TRACE_SCOPE_FLOW(name, id) \
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int _WESTON_TRACE_SCOPE_VAR(__LINE__) \
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__attribute__((cleanup(_weston_trace_scope_end), unused)) = \
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_weston_trace_scope_flow_begin(name, id)
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static inline int
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_weston_trace_scope_begin(const char *name)
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{
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_WESTON_TRACE_BEGIN(name);
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return 0;
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}
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static inline int
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_weston_trace_scope_flow_begin(const char *name, uint64_t *id)
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{
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if (*id == 0)
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*id = util_perfetto_next_id();
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_WESTON_TRACE_FLOW_BEGIN(name, *id);
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return 0;
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}
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static inline void
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_weston_trace_scope_end(int *scope)
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{
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_WESTON_TRACE_END();
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}
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#else
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#define _WESTON_TRACE_SCOPE(name)
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#endif /* __has_attribute(cleanup) && __has_attribute(unused) */
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#else /* No perfetto, make these all do nothing */
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#define _WESTON_TRACE_SCOPE(name)
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#define _WESTON_TRACE_SCOPE_FLOW(name, id)
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#define _WESTON_TRACE_FUNC()
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#define _WESTON_TRACE_FUNC_FLOW(id)
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#define _WESTON_TRACE_SET_COUNTER(name, value)
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#define _WESTON_TRACE_TIMESTAMP_BEGIN(name, track_id, flow_id, clock, timestamp)
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#define _WESTON_TRACE_TIMESTAMP_END(name, track_id, clock, timestamp)
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#endif /* HAVE_PERFETTO */
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#define WESTON_TRACE_SCOPE(name) _WESTON_TRACE_SCOPE(name)
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#define WESTON_TRACE_SCOPE_FLOW(name, id) _WESTON_TRACE_SCOPE_FLOW(name, id)
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#define WESTON_TRACE_FUNC() _WESTON_TRACE_SCOPE(__func__)
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#define WESTON_TRACE_FUNC_FLOW(id) _WESTON_TRACE_SCOPE_FLOW(__func__, id)
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#define WESTON_TRACE_SET_COUNTER(name, value) _WESTON_TRACE_SET_COUNTER(name, value)
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#define WESTON_TRACE_TIMESTAMP_BEGIN(name, track_id, flow_id, clock, timestamp) \
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_WESTON_TRACE_TIMESTAMP_BEGIN(name, track_id, flow_id, clock, timestamp)
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#define WESTON_TRACE_TIMESTAMP_END(name, track_id, clock, timestamp) \
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_WESTON_TRACE_TIMESTAMP_END(name, track_id, clock, timestamp)
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#endif /* WESTON_TRACE_H */
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