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2c67dc457bc67367dc8fcd8f471ce2d5bb5f7b2b
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
blktrace.c
Merge tag 'mm-nonmm-stable-2025-08-03-12-47' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
2025-08-03 16:23:09 -07:00
bpf_trace.c
Merge tag 'pull-f_path' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
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_internal.h
function_graph: Make fgraph_update_pid_func() a stub for !DYNAMIC_FTRACE
2024-06-10 18:08:23 -04:00
ftrace.c
ftrace: Fix softlockup in ftrace_module_enable
2025-09-30 17:27:58 -04:00
Kconfig
Merge tag 'trace-v6.17' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace
2025-08-01 10:29:36 -07:00
kprobe_event_gen_test.c
…
Makefile
tracing: Have eprobes have their own config option
2025-07-30 10:38:43 -04:00
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_benchmark.c
ring-buffer: Use str_low_high() helper in ring_buffer_producer()
2024-10-19 11:12:25 -04:00
ring_buffer.c
ring buffer: Propagate __rb_map_vma return value to caller
2025-10-08 21:48:58 -04:00
rpm-traces.c
…
synth_event_gen_test.c
…
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
…
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
…
trace_btf.h
…
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_filter_test.h
…
trace_events_filter.c
Merge tag 'trace-v6.17' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace
2025-08-01 10:29:36 -07:00
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
Merge tag 'trace-v6.16' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace
2025-05-29 21:04:36 -07:00
trace_events_user.c
Merge tag 'trace-v6.18' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace
2025-10-05 09:43:36 -07:00
trace_events.c
tracing: Fix lock imbalance in s_start() memory allocation failure path
2025-10-03 12:13:12 -04:00
trace_export.c
…
trace_fprobe.c
tracing: Fix race condition in kprobe initialization causing NULL pointer dereference
2025-10-02 08:05:01 +09:00
trace_functions_graph.c
fgraph: Copy args in intermediate storage with entry
2025-08-22 17:32:35 -04:00
trace_functions.c
Merge tag 'trace-v6.16' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace
2025-05-29 21:04:36 -07:00
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_selftest.c
…
trace_kprobe_selftest.h
…
trace_kprobe.c
tracing: Fix race condition in kprobe initialization causing NULL pointer dereference
2025-10-02 08:05:01 +09:00
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
Merge tag 'trace-v6.18-2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace
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_kernel.h
…
trace_probe_tmpl.h
tracing/fprobe: Enable fprobe events with CONFIG_DYNAMIC_FTRACE_WITH_ARGS
2024-12-26 10:50:04 -05:00
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_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_dynamic.c
…
trace_selftest.c
fgraph: Pass ftrace_regs to retfunc
2024-12-26 10:50:03 -05:00
trace_seq.c
…
trace_stack.c
Merge tag 'trace-v6.16' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace
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
trace.c
Merge tag 'trace-v6.18-3' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace
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
tracing_map.c
tracing: Use vmalloc_array() to improve code
2025-09-23 09:31:58 -04:00
tracing_map.h
…