Shrikanth Hegde 24e0e61040 tracing: Print lazy preemption model ...

Print lazy preemption model in ftrace header when latency-format=1.

 # cat /sys/kernel/debug/sched/preempt
 none voluntary full (lazy)

Without patch:
  latency: 0 us, #232946/232946, CPU#40 | (M:unknown VP:0, KP:0, SP:0 HP:0 #P:80)
                                             ^^^^^^^

With Patch:
  latency: 0 us, #1897938/25566788, CPU#16 | (M:lazy VP:0, KP:0, SP:0 HP:0 #P:80)
                                                ^^^^

Now that lazy preemption is part of the kernel, make sure the tracing
infrastructure reflects that.

Link: https://lore.kernel.org/20250103093647.575919-1-sshegde@linux.ibm.com
Signed-off-by: Shrikanth Hegde <sshegde@linux.ibm.com>
Acked-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>

2025-01-14 09:44:33 -05:00

..

rv

rv: Fix a typo

2024-10-04 19:09:23 -04:00

blktrace.c

blktrace: convert strncpy() to strscpy_pad()

2024-04-25 21:07:08 -07:00

bpf_trace.c

bpf,perf: Fix invalid prog_array access in perf_event_detach_bpf_prog

2024-12-10 10:16:28 -08:00

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

fgraph: Add READ_ONCE() when accessing fgraph_array[]

2025-01-02 17:21:18 -05:00

fprobe.c

fprobe: Fix to allocate entry_data_size buffer with rethook instances

2024-03-01 09:18:24 +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 function profiler's filtering functionality

2025-01-02 17:21:33 -05:00

Kconfig

function_graph: Support recording and printing the function return address

2024-10-05 10:14:04 -04:00

kprobe_event_gen_test.c

…

Makefile

tracing/probes: Move finding func-proto API and getting func-param API to trace_btf

2023-08-23 09:39:45 +09:00

pid_list.c

trace/pid_list: Change gfp flags in pid_list_fill_irq()

2024-07-15 15:07:14 -04:00

pid_list.h

…

power-traces.c

…

preemptirq_delay_test.c

minmax: make generic MIN() and MAX() macros available everywhere

2024-07-28 15:49:18 -07:00

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: Fix overflow in __rb_map_vma

2024-12-18 14:15:10 -05:00

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_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: Remove TRACE_EVENT_FL_FILTERED logic

2024-10-08 15:24:49 -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

…

trace_dynevent.h

…

trace_entries.h

function_graph: Support recording and printing the function return address

2024-10-05 10:14:04 -04:00

trace_eprobe.c

tracing/eprobe: Fix to release eprobe when failed to add dyn_event

2024-12-08 23:25:09 +09:00

trace_event_perf.c

trace/trace_event_perf: remove duplicate samples on the first tracepoint event

2024-10-09 19:44:54 -04:00

trace_events_filter_test.h

…

trace_events_filter.c

tracing: Replace multiple deprecated strncpy with memcpy

2024-10-30 19:41:08 -04:00

trace_events_hist.c

tracing: Remove redundant check on field->field in histograms

2024-11-12 11:36:57 -05:00

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/synthetic: Fix trace_string() return value

2024-02-15 11:40:01 -05:00

trace_events_trigger.c

tracing: Have format file honor EVENT_FILE_FL_FREED

2024-08-07 18:12:46 -04:00

trace_events_user.c

tracepoints: Use new static branch API

2024-10-08 21:17:39 -04:00

trace_events.c

tracing: Have process_string() also allow arrays

2024-12-31 00:10:32 -05:00

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/probes: Fix MAX_TRACE_ARGS limit handling

2024-10-23 17:24:44 +09:00

trace_functions_graph.c

Merge tag 'trace-v6.13' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace

2024-11-22 13:27:01 -08:00

trace_functions.c

ftrace: Do not find "true_parent" if HAVE_DYNAMIC_FTRACE_WITH_ARGS is not set

2024-12-16 17:22:26 -05:00

trace_hwlat.c

tracing: Remove TRACE_EVENT_FL_FILTERED logic

2024-10-08 15:24:49 -04:00

trace_irqsoff.c

tracing: Fix irqsoff and wakeup latency tracers when using function graph

2025-01-14 09:38:09 -05:00

trace_kdb.c

trace: kdb: Replace simple_strtoul with kstrtoul in kdb_ftdump

2024-11-02 08:33:13 +00:00

trace_kprobe_selftest.c

…

trace_kprobe_selftest.h

…

trace_kprobe.c

tracing/kprobes: Fix to free objects when failed to copy a symbol

2025-01-10 08:57:18 +09:00

trace_mmiotrace.c

tracing: Remove TRACE_EVENT_FL_FILTERED logic

2024-10-08 15:24:49 -04:00

trace_nop.c

…

trace_osnoise.c

tracing: Remove TRACE_EVENT_FL_FILTERED logic

2024-10-08 15:24:49 -04:00

trace_output.c

tracing: Check "%s" dereference via the field and not the TP_printk format

2024-12-17 11:40:11 -05:00

trace_output.h

…

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/probes: Support $argN in return probe (kprobe and fprobe)

2024-03-07 00:27:34 +09:00

trace_probe.c

tracing: Consider the NULL character when validating the event length

2024-10-23 17:24:47 +09:00

trace_probe.h

tracing/probes: support '%pd' type for print struct dentry's name

2024-05-01 23:18:47 +09:00

trace_recursion_record.c

…

trace_sched_switch.c

tracing: Replace strncpy() with strscpy() when copying comm

2024-11-01 14:37:31 -04:00

trace_sched_wakeup.c

tracing: Fix irqsoff and wakeup latency tracers when using function graph

2025-01-14 09:38:09 -05:00

trace_selftest_dynamic.c

…

trace_selftest.c

Merge tag 'ftrace-v6.13' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace

2024-11-20 11:34:10 -08:00

trace_seq.c

trace_seq: Increase the buffer size to almost two pages

2023-12-18 23:14:16 -05:00

trace_stack.c

sysctl: treewide: constify the ctl_table argument of proc_handlers

2024-07-24 20:59:29 +02:00

trace_stat.c

…

trace_stat.h

…

trace_synth.h

…

trace_syscalls.c

tracing/perf: Add might_fault check to syscall probes

2024-10-09 17:09:46 -04:00

trace_uprobe.c

bpf: Fix theoretical prog_array UAF in __uprobe_perf_func()

2024-12-10 13:06:51 -08:00

trace.c

tracing: Print lazy preemption model

2025-01-14 09:44:33 -05:00

trace.h

tracing: Check "%s" dereference via the field and not the TP_printk format

2024-12-17 11:40:11 -05:00

tracing_map.c

tracing: Fix cmp_entries_dup() to respect sort() comparison rules

2024-12-04 10:38:24 -05:00

tracing_map.h

tracing: Remove unused extern declaration tracing_map_set_field_descr()

2023-07-23 11:08:14 -04:00