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linux/include/trace/perf.h

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tracing: Move the perf code out of trace_event.h The trace_event.h file is for the generic trace event code. Move the perf related code into its own trace header file perf.h Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2015-04-29 13:11:00 -04:00
tracing: Use outer () on __get_str() definition __get_str(str)'s definition includes a (char *) operator overloading that is not protected with outer (). This patch adds () around __get_str()'s definition, enabling some code cleanup. Link: http://lkml.kernel.org/r/20ac1a10c2ec4ccd23e4a8ef34101fb6e4157d37.1467407618.git.bristot@redhat.com Cc: Trond Myklebust <trond.myklebust@primarydata.com> Cc: Anna Schumaker <anna.schumaker@netapp.com> Cc: Ingo Molnar <mingo@redhat.com> Suggested-by: Steven Rostedt <rostedt@goodmis.org> Reviewed-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Daniel Bristot de Oliveira <bristot@redhat.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2016-07-01 20:44:34 -03:00
tracing: Move the perf code out of trace_event.h The trace_event.h file is for the generic trace event code. Move the perf related code into its own trace header file perf.h Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2015-04-29 13:11:00 -04:00
tracing: Rename ftrace_event_{call,class} to trace_event_{call,class} The name "ftrace" really refers to the function hook infrastructure. It is not about the trace_events. The structures ftrace_event_call and ftrace_event_class have nothing to do with the function hooks, and are really trace_event structures. Rename ftrace_event_* to trace_event_*. Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2015-05-05 11:45:27 -04:00
tracing: Rename ftrace_data_offset_##call to trace_event_data_offset_##call The name "ftrace" really refers to the function hook infrastructure. It is not about the trace_events. The structure ftrace_data_offset_##call is used to find the offsets of dynamically allocated fields in trace_events. It has nothing to do with function tracing. Rename it. Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2015-05-13 15:33:52 -04:00
tracing: Rename ftrace_raw_##call event structures to trace_event_raw_##call The name "ftrace" really refers to the function hook infrastructure. It is not about the trace_events. The ftrace_raw_##call structures are built by macros for trace events. They have nothing to do with function tracing. Rename them. Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2015-05-13 15:27:47 -04:00
perf, bpf: allow bpf programs attach to tracepoints introduce BPF_PROG_TYPE_TRACEPOINT program type and allow it to be attached to the perf tracepoint handler, which will copy the arguments into the per-cpu buffer and pass it to the bpf program as its first argument. The layout of the fields can be discovered by doing 'cat /sys/kernel/debug/tracing/events/sched/sched_switch/format' prior to the compilation of the program with exception that first 8 bytes are reserved and not accessible to the program. This area is used to store the pointer to 'struct pt_regs' which some of the bpf helpers will use: +---------+ | 8 bytes | hidden 'struct pt_regs *' (inaccessible to bpf program) +---------+ | N bytes | static tracepoint fields defined in tracepoint/format (bpf readonly) +---------+ | dynamic | __dynamic_array bytes of tracepoint (inaccessible to bpf yet) +---------+ Not that all of the fields are already dumped to user space via perf ring buffer and broken application access it directly without consulting tracepoint/format. Same rule applies here: static tracepoint fields should only be accessed in a format defined in tracepoint/format. The order of fields and field sizes are not an ABI. Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-04-06 18:43:25 -07:00
tracing: Move the perf code out of trace_event.h The trace_event.h file is for the generic trace event code. Move the perf related code into its own trace header file perf.h Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2015-04-29 13:11:00 -04:00
perf: remove unused __addr variable now all calls to perf_trace_buf_submit() pass 0 as 4th argument which will be repurposed in the next patch which will change the meaning of 1st arg of perf_tp_event() to event_type Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-04-06 18:43:23 -07:00
tracing: Move the perf code out of trace_event.h The trace_event.h file is for the generic trace event code. Move the perf related code into its own trace header file perf.h Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2015-04-29 13:11:00 -04:00
tracing: Rename ftrace_get_offsets_##call() to trace_event_get_offsets_##call() The name "ftrace" really refers to the function hook infrastructure. It is not about the trace_events. The function ftrace_get_offsets_##call() is used to find the offset into dynamically allocated trace event fields for printing. It has nothing to do with function tracing. Rename it. Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2015-05-13 15:40:23 -04:00
tracing: Move the perf code out of trace_event.h The trace_event.h file is for the generic trace event code. Move the perf related code into its own trace header file perf.h Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2015-04-29 13:11:00 -04:00
perf, bpf: allow bpf programs attach to tracepoints introduce BPF_PROG_TYPE_TRACEPOINT program type and allow it to be attached to the perf tracepoint handler, which will copy the arguments into the per-cpu buffer and pass it to the bpf program as its first argument. The layout of the fields can be discovered by doing 'cat /sys/kernel/debug/tracing/events/sched/sched_switch/format' prior to the compilation of the program with exception that first 8 bytes are reserved and not accessible to the program. This area is used to store the pointer to 'struct pt_regs' which some of the bpf helpers will use: +---------+ | 8 bytes | hidden 'struct pt_regs *' (inaccessible to bpf program) +---------+ | N bytes | static tracepoint fields defined in tracepoint/format (bpf readonly) +---------+ | dynamic | __dynamic_array bytes of tracepoint (inaccessible to bpf yet) +---------+ Not that all of the fields are already dumped to user space via perf ring buffer and broken application access it directly without consulting tracepoint/format. Same rule applies here: static tracepoint fields should only be accessed in a format defined in tracepoint/format. The order of fields and field sizes are not an ABI. Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-04-06 18:43:25 -07:00
tracing: Move the perf code out of trace_event.h The trace_event.h file is for the generic trace event code. Move the perf related code into its own trace header file perf.h Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2015-04-29 13:11:00 -04:00
perf: split perf_trace_buf_prepare into alloc and update parts split allows to move expensive update of 'struct trace_entry' to later phase. Repurpose unused 1st argument of perf_tp_event() to indicate event type. While splitting use temp variable 'rctx' instead of '*rctx' to avoid unnecessary loads done by the compiler due to -fno-strict-aliasing Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-04-06 18:43:24 -07:00
tracing: Move the perf code out of trace_event.h The trace_event.h file is for the generic trace event code. Move the perf related code into its own trace header file perf.h Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2015-04-29 13:11:00 -04:00
perf, bpf: minimize the size of perf_trace_() tracepoint handler move trace_call_bpf() into helper function to minimize the size of perf_trace_*() tracepoint handlers. text data bss dec hex filename 10541679 5526646 2945024 19013349 1221ee5 vmlinux_before 10509422 5526646 2945024 18981092 121a0e4 vmlinux_after It may seem that perf_fetch_caller_regs() can also be moved, but that is incorrect, since ip/sp will be wrong. bpf+tracepoint performance is not affected, since perf_swevent_put_recursion_context() is now inlined. export_symbol_gpl can also be dropped. No measurable change in normal perf tracepoints. Suggested-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2016-04-18 20:11:50 -07:00
tracing: Move the perf code out of trace_event.h The trace_event.h file is for the generic trace event code. Move the perf related code into its own trace header file perf.h Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2015-04-29 13:11:00 -04:00