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In order to testing filtering and histograms via the trace event benchmark, record the delta time of the last event as a numeric value (currently, it just saves it within the string) so that filters and histograms can use it. Link: https://lkml.kernel.org/r/20220906225529.213677569@goodmis.org Cc: Ingo Molnar <mingo@kernel.org> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Masami Hiramatsu <mhiramat@kernel.org> Cc: Tom Zanussi <zanussi@kernel.org> Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
44 lines
965 B
C
44 lines
965 B
C
// SPDX-License-Identifier: GPL-2.0
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#undef TRACE_SYSTEM
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#define TRACE_SYSTEM benchmark
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#if !defined(_TRACE_BENCHMARK_H) || defined(TRACE_HEADER_MULTI_READ)
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#define _TRACE_BENCHMARK_H
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#include <linux/tracepoint.h>
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extern int trace_benchmark_reg(void);
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extern void trace_benchmark_unreg(void);
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#define BENCHMARK_EVENT_STRLEN 128
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TRACE_EVENT_FN(benchmark_event,
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TP_PROTO(const char *str, u64 delta),
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TP_ARGS(str, delta),
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TP_STRUCT__entry(
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__array( char, str, BENCHMARK_EVENT_STRLEN )
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__field( u64, delta)
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),
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TP_fast_assign(
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memcpy(__entry->str, str, BENCHMARK_EVENT_STRLEN);
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__entry->delta = delta;
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),
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TP_printk("%s delta=%llu", __entry->str, __entry->delta),
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trace_benchmark_reg, trace_benchmark_unreg
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);
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#endif /* _TRACE_BENCHMARK_H */
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#undef TRACE_INCLUDE_FILE
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#undef TRACE_INCLUDE_PATH
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#define TRACE_INCLUDE_PATH .
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#define TRACE_INCLUDE_FILE trace_benchmark
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/* This part must be outside protection */
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#include <trace/define_trace.h>
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