[PATCH] cpuidle: add tracepoint for enter_s2idle flow

[PATCH] cpuidle: add tracepoint for enter_s2idle flow

[qiwu.chen]

Add the tracepoint cpu_idle in enter_s2idle_proper for tracing
the enter and exit events with a determined idle state.

Signed-off-by: qiwu.chen <qiwu.chen@transsion.com>
---
 drivers/cpuidle/cpuidle.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/cpuidle/cpuidle.c b/drivers/cpuidle/cpuidle.c
index 0835da449db8..9ff8fa5db444 100644
--- a/drivers/cpuidle/cpuidle.c
+++ b/drivers/cpuidle/cpuidle.c
@@ -147,6 +147,7 @@ static noinstr void enter_s2idle_proper(struct cpuidle_driver *drv,
 	struct cpuidle_state *target_state = &drv->states[index];
 	ktime_t time_start, time_end;
 
+	trace_cpu_idle(index, dev->cpu);
 	instrumentation_begin();
 
 	time_start = ns_to_ktime(local_clock_noinstr());
@@ -178,6 +179,7 @@ static noinstr void enter_s2idle_proper(struct cpuidle_driver *drv,
 	dev->states_usage[index].s2idle_time += ktime_us_delta(time_end, time_start);
 	dev->states_usage[index].s2idle_usage++;
 	instrumentation_end();
+	trace_cpu_idle(PWR_EVENT_EXIT, dev->cpu);
 }
 
 /**
-- 
2.25.1

Re: [PATCH] cpuidle: add tracepoint for enter_s2idle flow

[kernel test robot]

Hi qiwu.chen,

kernel test robot noticed the following build warnings:

[auto build test WARNING on rafael-pm/linux-next]
[also build test WARNING on rafael-pm/bleeding-edge amd-pstate/linux-next amd-pstate/bleeding-edge linus/master v6.15-rc7 next-20250516]
[cannot apply to daniel-lezcano/clockevents/next]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/qiwu-chen/cpuidle-add-tracepoint-for-enter_s2idle-flow/20250520-111031
base:   https://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git linux-next
patch link:    https://lore.kernel.org/r/20250520030922.9505-1-qiwu.chen%40transsion.com
patch subject: [PATCH] cpuidle: add tracepoint for enter_s2idle flow
config: x86_64-randconfig-075-20250521 (https://download.01.org/0day-ci/archive/20250521/202505210727.H0ZDt9ng-lkp@intel.com/config)
compiler: clang version 20.1.2 (https://github.com/llvm/llvm-project 58df0ef89dd64126512e4ee27b4ac3fd8ddf6247)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250521/202505210727.H0ZDt9ng-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202505210727.H0ZDt9ng-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> vmlinux.o: warning: objtool: enter_s2idle_proper+0x34: call to trace_cpu_idle() leaves .noinstr.text section

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki

Re: [PATCH] cpuidle: add tracepoint for enter_s2idle flow

[kernel test robot]

Hi qiwu.chen,

kernel test robot noticed the following build errors:

[auto build test ERROR on rafael-pm/linux-next]
[also build test ERROR on rafael-pm/bleeding-edge amd-pstate/linux-next amd-pstate/bleeding-edge linus/master v6.15-rc7 next-20250522]
[cannot apply to daniel-lezcano/clockevents/next]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/qiwu-chen/cpuidle-add-tracepoint-for-enter_s2idle-flow/20250520-111031
base:   https://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git linux-next
patch link:    https://lore.kernel.org/r/20250520030922.9505-1-qiwu.chen%40transsion.com
patch subject: [PATCH] cpuidle: add tracepoint for enter_s2idle flow
config: x86_64-randconfig-071-20250522 (https://download.01.org/0day-ci/archive/20250523/202505230118.SHsiPbMH-lkp@intel.com/config)
compiler: gcc-12 (Debian 12.2.0-14) 12.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250523/202505230118.SHsiPbMH-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202505230118.SHsiPbMH-lkp@intel.com/

All errors (new ones prefixed by >>):

>> vmlinux.o: error: objtool: enter_s2idle_proper+0x2f: call to trace_cpu_idle() leaves .noinstr.text section

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki