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

…

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

…

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

…

ring_buffer_benchmark.c

…

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

…

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

…

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

…

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

…

trace_printk.c

…

trace_probe_kernel.h

…

trace_probe_tmpl.h

…

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

…

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

…

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

…