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linux/kernel/trace
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Menglong Dong 2c67dc457b tracing: fprobe: optimization for entry only case 
For now, fgraph is used for the fprobe, even if we need trace the entry
only. However, the performance of ftrace is better than fgraph, and we
can use ftrace_ops for this case.

Then performance of kprobe-multi increases from 54M to 69M. Before this
commit:

  $ ./benchs/run_bench_trigger.sh kprobe-multi
  kprobe-multi   :   54.663 ± 0.493M/s

After this commit:

  $ ./benchs/run_bench_trigger.sh kprobe-multi
  kprobe-multi   :   69.447 ± 0.143M/s

Mitigation is disable during the bench testing above.

Link: https://lore.kernel.org/all/20251015083238.2374294-2-dongml2@chinatelecom.cn/

Signed-off-by: Menglong Dong <dongml2@chinatelecom.cn>
Signed-off-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
 		2025-11-11 22:32:09 +09:00
..
rv rv: Make rtapp/pagefault monitor depends on CONFIG_MMU 2025-10-20 12:47:40 +02:00
Kconfig tracing changes for 6.17 2025-08-01 10:29:36 -07:00
Makefile tracing: Have eprobes have their own config option 2025-07-30 10:38:43 -04:00
blktrace.c Significant patch series in this pull request: 2025-08-03 16:23:09 -07:00
bpf_trace.c file->f_path constification 2025-10-03 16:32:36 -07:00
bpf_trace.h tracing/treewide: Remove second parameter of __assign_str() 2024-05-22 20:14:47 -04:00
error_report-traces.c
…
fgraph.c tracing: fgraph: Protect return handler from recursion loop 2025-09-27 09:04:05 -04:00
fprobe.c tracing: fprobe: optimization for entry only case 2025-11-11 22:32:09 +09:00
ftrace.c ftrace: Fix softlockup in ftrace_module_enable 2025-09-30 17:27:58 -04:00
ftrace_internal.h function_graph: Make fgraph_update_pid_func() a stub for !DYNAMIC_FTRACE 2024-06-10 18:08:23 -04:00
kprobe_event_gen_test.c
…
pid_list.c tracing: Cleanup upper_empty() in pid_list 2025-05-14 11:19:32 -04:00
pid_list.h
…
power-traces.c PM: cpufreq: powernv/tracing: Move powernv_throttle trace event 2025-07-21 16:40:56 -04:00
preemptirq_delay_test.c kernel: trace: preemptirq_delay_test: use offstack cpu mask 2025-07-08 18:17:38 -04:00
rethook.c rethook: honor CONFIG_FTRACE_VALIDATE_RCU_IS_WATCHING in rethook_try_get() 2024-05-01 23:18:48 +09:00
ring_buffer.c ring buffer: Propagate __rb_map_vma return value to caller 2025-10-08 21:48:58 -04:00
ring_buffer_benchmark.c ring-buffer: Use str_low_high() helper in ring_buffer_producer() 2024-10-19 11:12:25 -04:00
rpm-traces.c
…
synth_event_gen_test.c tracing / synthetic: Disable events after testing in synth_event_gen_test_init() 2023-12-21 10:04:45 -05:00
trace.c tracing fixes for v6.18: 2025-10-11 16:06:04 -07:00
trace.h tracing: Replace syscall RCU pointer assignment with READ/WRITE_ONCE() 2025-09-23 09:29:29 -04:00
trace_benchmark.c tracing: Improve benchmark test performance by using do_div() 2024-05-13 20:00:57 -04:00
trace_benchmark.h
…
trace_boot.c tracing: Allow creating instances with specified system events 2023-12-18 23:14:16 -05:00
trace_branch.c tracing: branch: Use trace_tracing_is_on_cpu() instead of "disabled" field 2025-05-09 15:19:10 -04:00
trace_btf.c tracing/probes: Fix to search structure fields correctly 2024-02-17 21:25:42 +09:00
trace_btf.h tracing/probes: Add a function to search a member of a struct/union 2023-08-23 09:40:16 +09:00
trace_clock.c tracing: Use atomic64_inc_return() in trace_clock_counter() 2024-10-09 19:59:49 -04:00
trace_dynevent.c tracing: dynevent: Add a missing lockdown check on dynevent 2025-09-25 00:22:46 +09:00
trace_dynevent.h tracing: probes: Fix a possible race in trace_probe_log APIs 2025-05-13 22:23:34 +09:00
trace_entries.h ftrace: Expose call graph depth as unsigned int 2025-05-08 09:36:08 -04:00
trace_eprobe.c tracing: uprobe: eprobes: Allocate traceprobe_parse_context per probe 2025-11-01 01:10:29 +09:00
trace_event_perf.c perf: Remove unnecessary parameter of security check 2025-02-26 14:13:58 -05:00
trace_events.c tracing: Fix lock imbalance in s_start() memory allocation failure path 2025-10-03 12:13:12 -04:00
trace_events_filter.c tracing changes for 6.17 2025-08-01 10:29:36 -07:00
trace_events_filter_test.h
…
trace_events_hist.c tracing: Rename event_trigger_alloc() to trigger_data_alloc() 2025-05-09 15:19:11 -04:00
trace_events_inject.c tracing: Have format file honor EVENT_FILE_FL_FREED 2024-08-07 18:12:46 -04:00
trace_events_synth.c tracing: Add guard(ring_buffer_nest) 2025-08-01 16:49:15 -04:00
trace_events_trigger.c tracing updates for v6.16: 2025-05-29 21:04:36 -07:00
trace_events_user.c tracing updates for v6.18: 2025-10-05 09:43:36 -07:00
trace_export.c tracing: Add back FORTIFY_SOURCE logic to kernel_stack event structure 2023-07-30 18:11:44 -04:00
trace_fprobe.c tracing: Fix race condition in kprobe initialization causing NULL pointer dereference 2025-10-02 08:05:01 +09:00
trace_functions.c tracing updates for v6.16: 2025-05-29 21:04:36 -07:00
trace_functions_graph.c fgraph: Copy args in intermediate storage with entry 2025-08-22 17:32:35 -04:00
trace_hwlat.c tracing: Replace opencoded cpumask_next_wrap() in move_to_next_cpu() 2025-07-08 18:17:29 -04:00
trace_irqsoff.c tracing: Fix irqoff tracers on failure of acquiring calltime 2025-10-08 12:10:44 -04:00
trace_kdb.c ring-buffer: Remove ring_buffer_read_prepare_sync() 2025-07-22 20:01:41 -04:00
trace_kprobe.c tracing: Fix race condition in kprobe initialization causing NULL pointer dereference 2025-10-02 08:05:01 +09:00
trace_kprobe_selftest.c tracing: arm64: Avoid missing-prototype warnings 2023-07-12 12:06:04 -04:00
trace_kprobe_selftest.h
…
trace_mmiotrace.c tracing/mmiotrace: Remove reference to unused per CPU data pointer 2025-05-08 09:36:09 -04:00
trace_nop.c
…
trace_osnoise.c tracing clean up and fixes for v6.18: 2025-10-09 12:18:22 -07:00
trace_output.c tracing: Have unsigned int function args displayed as hexadecimal 2025-08-01 19:14:51 -04:00
trace_output.h ftrace: Add print_function_args() 2025-03-04 11:27:23 -05:00
trace_preemptirq.c tracing: Fix archs that still call tracepoints without RCU watching 2024-12-05 09:28:58 -05:00
trace_printk.c
…
trace_probe.c tracing: probes: Replace strcpy() with memcpy() in __trace_probe_log_err() 2025-11-01 01:10:29 +09:00
trace_probe.h tracing: probes: Use __free() for trace_probe_log 2025-11-01 01:10:28 +09:00
trace_probe_kernel.h tracing/probes: Fix to record 0-length data_loc in fetch_store_string*() if fails 2023-07-14 17:04:58 +09:00
trace_probe_tmpl.h tracing/fprobe: Enable fprobe events with CONFIG_DYNAMIC_FTRACE_WITH_ARGS 2024-12-26 10:50:04 -05:00
trace_recursion_record.c
…
trace_sched_switch.c tracing: Ensure optimized hashing works 2025-09-30 17:27:58 -04:00
trace_sched_wakeup.c tracing: Fix wakeup tracers on failure of acquiring calltime 2025-10-08 12:10:26 -04:00
trace_selftest.c fgraph: Pass ftrace_regs to retfunc 2024-12-26 10:50:03 -05:00
trace_selftest_dynamic.c
…
trace_seq.c trace_seq: Increase the buffer size to almost two pages 2023-12-18 23:14:16 -05:00
trace_stack.c tracing updates for v6.16: 2025-05-29 21:04:36 -07:00
trace_stat.c tracing: Switch trace_stat.c code over to use guard() 2024-12-26 10:38:37 -05:00
trace_stat.h
…
trace_synth.h
…
trace_syscalls.c tracing: Have syscall trace events show "0x" for values greater than 10 2025-09-23 09:29:29 -04:00
trace_uprobe.c tracing: uprobe: eprobes: Allocate traceprobe_parse_context per probe 2025-11-01 01:10:29 +09:00
tracing_map.c tracing: Use vmalloc_array() to improve code 2025-09-23 09:31:58 -04:00
tracing_map.h tracing: Remove unused extern declaration tracing_map_set_field_descr() 2023-07-23 11:08:14 -04:00