[core] Attribute "took a long time" blocking warning to the owning script (#16768)

esphome/components/runtime_stats/runtime_stats.h

@@ -47,7 +47,7 @@ class RuntimeStatsCollector {
   //               overhead between Phase A and stats belongs to "residual").
   // Residual overhead at log time = active − Σ(component) − before − tail,
   // which captures per-iteration inter-component bookkeeping (set_current_component,
-  // WarnIfComponentBlockingGuard construction/destruction, feed_wdt_with_time calls,
+  // LoopBlockingGuard construction/destruction, feed_wdt_with_time calls,
   // the for-loop itself).
   void record_loop_active(uint32_t active_us, uint32_t before_us, uint32_t tail_us) {
     this->period_active_count_++;

esphome/components/script/script.h

@@ -3,6 +3,7 @@
 #include <list>
 #include <memory>
 #include <tuple>
+#include "esphome/core/application.h"
 #include "esphome/core/automation.h"
 #include "esphome/core/component.h"
 #include "esphome/core/helpers.h"
@@ -57,6 +58,14 @@ template<typename... Ts> class Script : public ScriptLogger, public Trigger<Ts..
     this->execute(std::get<S>(tuple)...);
   }
 
+  // Run the action chain with this script's name published as the current source (RAII save/restore,
+  // so nesting composes), so deferred work inside the script is attributed to it in blocking
+  // warnings. Force-inlined to fold into the always-inlined trigger chain (no extra stack frame).
+  inline void run_actions_(const Ts &...x) ESPHOME_ALWAYS_INLINE {
+    ScopedSourceGuard source_guard{this->name_};
+    this->trigger(x...);
+  }
+
   const LogString *name_{nullptr};
 };
 
@@ -74,7 +83,7 @@ template<typename... Ts> class SingleScript : public Script<Ts...> {
       return;
     }
 
-    this->trigger(x...);
+    this->run_actions_(x...);
   }
 };
 
@@ -91,7 +100,7 @@ template<typename... Ts> class RestartScript : public Script<Ts...> {
       this->stop_action();
     }
 
-    this->trigger(x...);
+    this->run_actions_(x...);
   }
 };
 
@@ -136,7 +145,7 @@ template<typename... Ts> class QueueingScript : public Script<Ts...>, public Com
       return;
     }
 
-    this->trigger(x...);
+    this->run_actions_(x...);
     // Check if the trigger was immediate and we can continue right away.
     this->loop();
   }
@@ -175,7 +184,7 @@ template<typename... Ts> class QueueingScript : public Script<Ts...>, public Com
   }
 
   template<size_t... S> void trigger_tuple_(const std::tuple<Ts...> &tuple, std::index_sequence<S...> /*unused*/) {
-    this->trigger(std::get<S>(tuple)...);
+    this->run_actions_(std::get<S>(tuple)...);
   }
 
   int num_queued_ = 0;      // Number of queued instances (not including currently running)
@@ -197,7 +206,7 @@ template<typename... Ts> class ParallelScript : public Script<Ts...> {
                       LOG_STR_ARG(this->name_));
       return;
     }
-    this->trigger(x...);
+    this->run_actions_(x...);
   }
   void set_max_runs(int max_runs) { max_runs_ = max_runs; }
 

esphome/core/application.h

@@ -104,9 +104,13 @@ class Application {
   void register_area(Area *area) { this->areas_.push_back(area); }
 #endif
 
-  void set_current_component(Component *component) { this->current_component_ = component; }
   Component *get_current_component() { return this->current_component_; }
 
+  // Owning script of the action chain currently executing (nullptr when none); used to attribute
+  // blocking warnings for deferred work to the script that scheduled it.
+  void set_current_source(const LogString *source) { this->current_source_ = source; }
+  const LogString *get_current_source() { return this->current_source_; }
+
 // Entity register methods (generated from entity_types.h).
 // Each entity type gets two overloads:
 //   - register_<entity>(obj)                              — bare push_back
@@ -393,6 +397,7 @@ class Application {
  protected:
   friend Component;
   friend class Scheduler;
+  friend class LoopBlockingGuard;
 #ifdef USE_RUNTIME_STATS
   friend class runtime_stats::RuntimeStatsCollector;
 #endif
@@ -402,6 +407,14 @@ class Application {
   /// Freshen the cached loop component start time. Called by Scheduler before each dispatch.
   void set_loop_component_start_time_(uint32_t now) { this->loop_component_start_time_ = now; }
 
+  // Publish the running unit's identity (component + source) and dispatch time together, so a
+  // dispatch site can't set one without the others. Friend-only (Scheduler).
+  void set_current_execution_context_(Component *component, const LogString *source, uint32_t now) {
+    this->current_component_ = component;
+    this->current_source_ = source;
+    this->set_loop_component_start_time_(now);
+  }
+
   /// Walk all registered components looking for any whose component_state_
   /// has the given flag set. Used by Component::status_clear_*_slow_path_()
   /// (which is a friend) to decide whether to clear the corresponding bit on
@@ -482,6 +495,7 @@ class Application {
 
   // Pointer-sized members first
   Component *current_component_{nullptr};
+  const LogString *current_source_{nullptr};
 
   // std::vector (3 pointers each: begin, end, capacity)
   // Partitioned vector design for looping components
@@ -554,6 +568,76 @@ class Application {
 /// Global storage of Application pointer - only one Application can exist.
 extern Application App;  // NOLINT(cppcoreguidelines-avoid-non-const-global-variables)
 
+/// RAII guard that publishes a current source (e.g. a script name) for a scope and restores the
+/// previous value on exit, attributing deferred work scheduled inside to that source.
+class ScopedSourceGuard {
+ public:
+  explicit ScopedSourceGuard(const LogString *source) : prev_(App.get_current_source()) {
+    App.set_current_source(source);
+  }
+  ~ScopedSourceGuard() { App.set_current_source(this->prev_); }
+  ScopedSourceGuard(const ScopedSourceGuard &) = delete;
+  ScopedSourceGuard &operator=(const ScopedSourceGuard &) = delete;
+
+ private:
+  const LogString *prev_;
+};
+
+// Times one unit of work (a component loop() or a scheduled callback) and warns if it blocks the
+// main loop too long. The constructor publishes the unit's identity + dispatch time to App;
+// finish()/the cold warning path read them back, so the guard stores no copy.
+//
+// Guards must not nest: the constructor publishes to App but never restores on destruction, so a
+// nested guard would clobber the outer's context. Safe because the two dispatch sites (component
+// loop phase, execute_item_) run strictly sequentially and aren't re-entered from a timed callback.
+class LoopBlockingGuard {
+ public:
+  // Publish the unit's identity + dispatch time, then start timing. The millis start lives in App,
+  // so only the runtime-stats micros stamp is kept here.
+  LoopBlockingGuard(Component *component, const LogString *source, uint32_t now) {
+    App.set_current_execution_context_(component, source, now);
+#ifdef USE_RUNTIME_STATS
+    this->started_us_ = micros();
+#endif
+  }
+
+  // Finish the timing operation and return the current time (millis)
+  // Inlined: the fast path is just millis() + subtract + compare
+  inline uint32_t HOT finish() {
+#ifdef USE_RUNTIME_STATS
+    uint32_t elapsed_us = micros() - this->started_us_;
+    // Delays have no component; accumulate into the global counter so loop() can subtract them.
+    Component *component = App.get_current_component();
+    if (component != nullptr) {
+      component->runtime_stats_.record_time(elapsed_us);
+    } else {
+      ComponentRuntimeStats::global_recorded_us += elapsed_us;
+    }
+#endif
+    uint32_t curr_time = MillisInternal::get();
+#ifndef USE_BENCHMARK
+    // Fast path: compare against constant threshold in ms (computed at compile time from centiseconds)
+    static constexpr uint32_t WARN_IF_BLOCKING_OVER_MS = static_cast<uint32_t>(WARN_IF_BLOCKING_OVER_CS) * 10U;
+    uint32_t blocking_time = curr_time - App.get_loop_component_start_time();
+    if (blocking_time > WARN_IF_BLOCKING_OVER_MS) [[unlikely]] {
+      warn_blocking(blocking_time);
+    }
+#endif
+    return curr_time;
+  }
+
+  ~LoopBlockingGuard() = default;
+
+#ifdef USE_RUNTIME_STATS
+ protected:
+  uint32_t started_us_;
+#endif
+
+ private:
+  // Cold path; defined in component.cpp. Reads the current component/source from App to name the culprit.
+  static void __attribute__((noinline, cold)) warn_blocking(uint32_t blocking_time);
+};
+
 // Phase A: drain wake notifications and run the scheduler. Invoked on every
 // Application::loop() tick regardless of whether a component phase runs, so
 // scheduler items fire at their requested cadence even when the caller has
@@ -607,7 +691,7 @@ inline void ESPHOME_ALWAYS_INLINE Application::loop() {
   // before/tail splits recorded below.
   uint32_t loop_active_start_us = micros();
   // Snapshot the cumulative component-recorded time so we can subtract the
-  // slice that the scheduler spends inside its own WarnIfComponentBlockingGuard
+  // slice that the scheduler spends inside its own LoopBlockingGuard
   // (scheduler.cpp) — that time is already counted in per-component stats,
   // so charging it again to "before" would double-count.
   uint64_t loop_recorded_snap = ComponentRuntimeStats::global_recorded_us;
@@ -660,12 +744,9 @@ inline void ESPHOME_ALWAYS_INLINE Application::loop() {
          this->current_loop_index_++) {
       Component *component = this->looping_components_[this->current_loop_index_];
 
-      // Update the cached time before each component runs
-      this->loop_component_start_time_ = last_op_end_time;
-
       {
-        this->set_current_component(component);
-        WarnIfComponentBlockingGuard guard{component, last_op_end_time};
+        // Guard publishes this component (no script source) + dispatch time, then times loop().
+        LoopBlockingGuard guard{component, nullptr, last_op_end_time};
         component->loop();
         // Use the finish method to get the current time as the end time
         last_op_end_time = guard.finish();

esphome/core/base_automation.h

@@ -201,7 +201,10 @@ template<typename... Ts> class DelayAction : public Action<Ts...> {
           /* component= */ nullptr, Scheduler::SchedulerItem::TIMEOUT, Scheduler::NameType::SELF_POINTER,
           /* static_name= */ reinterpret_cast<const char *>(this), /* hash_or_id= */ 0, this->delay_.value(),
           [this]() { this->play_next_(); },
-          /* is_retry= */ false, /* skip_cancel= */ this->num_running_ > 1);
+          /* is_retry= */ false, /* skip_cancel= */ this->num_running_ > 1,
+          // Record the owning script (if any) so the blocking warning can name it; propagates across
+          // chained delays via the scheduler.
+          /* source= */ App.get_current_source());
     } else {
       // For delays with arguments, capture by value to preserve argument values
       // Arguments must be copied because original references may be invalid after delay
@@ -212,7 +215,9 @@ template<typename... Ts> class DelayAction : public Action<Ts...> {
           /* component= */ nullptr, Scheduler::SchedulerItem::TIMEOUT, Scheduler::NameType::SELF_POINTER,
           /* static_name= */ reinterpret_cast<const char *>(this), /* hash_or_id= */ 0, this->delay_.value(x...),
           std::move(f),
-          /* is_retry= */ false, /* skip_cancel= */ this->num_running_ > 1);
+          /* is_retry= */ false, /* skip_cancel= */ this->num_running_ > 1,
+          // See the no-argument branch above: record the owning script for log attribution.
+          /* source= */ App.get_current_source());
     }
   }
 

esphome/core/component.cpp

@@ -258,9 +258,11 @@ void Component::call() {
       break;
   }
 }
-bool Component::should_warn_of_blocking(uint32_t blocking_time) {
+bool Component::should_warn_of_blocking(uint32_t blocking_time, uint32_t &threshold_ms_out) {
   // Convert centisecond threshold to milliseconds for comparison
   uint32_t threshold_ms = static_cast<uint32_t>(this->warn_if_blocking_over_) * 10U;
+  // Report the threshold that was exceeded (before any ratcheting below) so the warning is accurate.
+  threshold_ms_out = threshold_ms;
   if (blocking_time > threshold_ms) {
     // Set new threshold: blocking_time + increment, converted back to centiseconds
     uint32_t new_threshold_ms = blocking_time + WARN_IF_BLOCKING_INCREMENT_MS;
@@ -491,19 +493,25 @@ uint32_t PollingComponent::get_update_interval() const { return this->update_int
 uint64_t ComponentRuntimeStats::global_recorded_us = 0;  // NOLINT(cppcoreguidelines-avoid-non-const-global-variables)
 #endif
 
-void __attribute__((noinline, cold))
-WarnIfComponentBlockingGuard::warn_blocking(Component *component, uint32_t blocking_time) {
-  bool should_warn;
+void __attribute__((noinline, cold)) LoopBlockingGuard::warn_blocking(uint32_t blocking_time) {
+  // Identity is published on App by the caller before the guard is built; read it back here.
+  Component *component = App.get_current_component();
+  // Component-less path always warns (the caller already checked the constant threshold).
+  uint32_t threshold_ms = WARN_IF_BLOCKING_OVER_MS;
+  if (component != nullptr && !component->should_warn_of_blocking(blocking_time, threshold_ms)) {
+    return;  // Component's (possibly ratcheted) threshold not exceeded yet
+  }
+  // Component name if any, else the published source (owning script), else a generic label.
+  const LogString *name;
   if (component != nullptr) {
-    should_warn = component->should_warn_of_blocking(blocking_time);
+    name = component->get_component_log_str();
   } else {
-    should_warn = true;  // Already checked > WARN_IF_BLOCKING_OVER_MS in caller
-  }
-  if (should_warn) {
-    ESP_LOGW(TAG, "%s took a long time for an operation (%" PRIu32 " ms), max is 30 ms",
-             component == nullptr ? LOG_STR_LITERAL("<null>") : LOG_STR_ARG(component->get_component_log_str()),
-             blocking_time);
+    name = App.get_current_source();
+    if (name == nullptr)
+      name = LOG_STR("a scheduled task");
   }
+  ESP_LOGW(TAG, "%s took a long time for an operation (%" PRIu32 " ms), max is %" PRIu32 " ms", LOG_STR_ARG(name),
+           blocking_time, threshold_ms);
 }
 
 #ifdef USE_SETUP_PRIORITY_OVERRIDE

esphome/core/component.h

@@ -118,7 +118,7 @@ struct ComponentRuntimeStats {
 
   // Cumulative sum of every record_time() duration since boot, across all
   // components. Used by Application::loop() to snapshot time spent inside
-  // WarnIfComponentBlockingGuard (including guards constructed by the
+  // LoopBlockingGuard (including guards constructed by the
   // scheduler at scheduler.cpp) so main-loop overhead accounting can
   // subtract scheduled-callback time from the before_loop_tasks_ wall time.
   static uint64_t global_recorded_us;  // NOLINT(cppcoreguidelines-avoid-non-const-global-variables)
@@ -326,7 +326,7 @@ class Component {
     return component_source_lookup(this->component_source_index_);
   }
 
-  bool should_warn_of_blocking(uint32_t blocking_time);
+  bool should_warn_of_blocking(uint32_t blocking_time, uint32_t &threshold_ms_out);
 
  protected:
   friend class Application;
@@ -571,7 +571,7 @@ class Component {
   volatile bool pending_enable_loop_{false};  ///< ISR-safe flag for enable_loop_soon_any_context
 #ifdef USE_RUNTIME_STATS
   friend class runtime_stats::RuntimeStatsCollector;
-  friend class WarnIfComponentBlockingGuard;
+  friend class LoopBlockingGuard;
   ComponentRuntimeStats runtime_stats_;
 #endif
 };
@@ -619,59 +619,7 @@ class PollingComponent : public Component {
   uint32_t update_interval_;
 };
 
-// millis() and micros() are available via hal.h
-
-class WarnIfComponentBlockingGuard {
- public:
-  WarnIfComponentBlockingGuard(Component *component, uint32_t start_time)
-      : started_(start_time),
-        component_(component)
-#ifdef USE_RUNTIME_STATS
-        ,
-        started_us_(micros())
-#endif
-  {
-  }
-
-  // Finish the timing operation and return the current time (millis)
-  // Inlined: the fast path is just millis() + subtract + compare
-  inline uint32_t HOT finish() {
-#ifdef USE_RUNTIME_STATS
-    uint32_t elapsed_us = micros() - this->started_us_;
-    // component_ is nullptr for self-keyed scheduler items (set_timeout/set_interval(self, ...))
-    if (this->component_ != nullptr) {
-      this->component_->runtime_stats_.record_time(elapsed_us);
-    } else {
-      // Still accumulate into the global counter so Application::loop() can subtract
-      // this time from before_loop_tasks_ wall time.
-      ComponentRuntimeStats::global_recorded_us += elapsed_us;
-    }
-#endif
-    uint32_t curr_time = MillisInternal::get();
-#ifndef USE_BENCHMARK
-    // Fast path: compare against constant threshold in ms (computed at compile time from centiseconds)
-    static constexpr uint32_t WARN_IF_BLOCKING_OVER_MS = static_cast<uint32_t>(WARN_IF_BLOCKING_OVER_CS) * 10U;
-    uint32_t blocking_time = curr_time - this->started_;
-    if (blocking_time > WARN_IF_BLOCKING_OVER_MS) [[unlikely]] {
-      warn_blocking(this->component_, blocking_time);
-    }
-#endif
-    return curr_time;
-  }
-
-  ~WarnIfComponentBlockingGuard() = default;
-
- protected:
-  uint32_t started_;
-  Component *component_;
-#ifdef USE_RUNTIME_STATS
-  uint32_t started_us_;
-#endif
-
- private:
-  // Cold path for blocking warning - defined in component.cpp
-  static void __attribute__((noinline, cold)) warn_blocking(Component *component, uint32_t blocking_time);
-};
+// LoopBlockingGuard lives in application.h because it reads its state from App.
 
 // Function to clear setup priority overrides after all components are set up
 // Only has an implementation when USE_SETUP_PRIORITY_OVERRIDE is defined

esphome/core/millis_internal.h

@@ -16,7 +16,7 @@ namespace esphome {
 
 // Friend-gated accessor for a fast millis() variant intended only for
 // known task-context callers on the main loop hot path (Application::loop()
-// and WarnIfComponentBlockingGuard::finish()). It skips the ISR-context
+// and LoopBlockingGuard::finish()). It skips the ISR-context
 // dispatch that the public esphome::millis() pays on ESP32 and libretiny.
 //
 // MUST NOT be called from ISR context: on ESP32 and libretiny it calls the
@@ -50,7 +50,7 @@ class MillisInternal {
 #endif
   }
   friend class Application;
-  friend class WarnIfComponentBlockingGuard;
+  friend class LoopBlockingGuard;
 };
 
 }  // namespace esphome

esphome/core/scheduler.cpp

@@ -131,7 +131,8 @@ bool Scheduler::is_retry_cancelled_locked_(Component *component, NameType name_t
 // name_type determines storage type: STATIC_STRING uses static_name, others use hash_or_id
 void HOT Scheduler::set_timer_common_(Component *component, SchedulerItem::Type type, NameType name_type,
                                       const char *static_name, uint32_t hash_or_id, uint32_t delay,
-                                      std::function<void()> &&func, bool is_retry, bool skip_cancel) {
+                                      std::function<void()> &&func, bool is_retry, bool skip_cancel,
+                                      const LogString *source) {
   if (delay == SCHEDULER_DONT_RUN) {
     // Still need to cancel existing timer if we have a name/id
     if (!skip_cancel) {
@@ -174,7 +175,12 @@ void HOT Scheduler::set_timer_common_(Component *component, SchedulerItem::Type
 
   // Create and populate the scheduler item
   SchedulerItem *item = this->get_item_from_pool_locked_();
+  // SELF_POINTER items store the source name (owning script) in the union slot instead of a component.
+  if (name_type == NameType::SELF_POINTER) {
+    item->source_name = source;
+  } else {
     item->component = component;
+  }
   item->set_name(name_type, static_name, hash_or_id);
   item->type = type;
   // Use destroy + placement-new instead of move-assignment.
@@ -642,8 +648,8 @@ uint32_t HOT Scheduler::call(uint32_t now) {
       // Not reached timeout yet, done for this call
       break;
     }
-    // Don't run on failed components
-    if (item->component != nullptr && item->component->is_failed()) {
+    // Don't run on failed components (is_item_failed_ exempts SELF_POINTER delays).
+    if (this->is_item_failed_(item)) {
       LockGuard guard{this->lock_};
       this->recycle_item_main_loop_(this->pop_raw_locked_());
       continue;
@@ -790,10 +796,21 @@ Scheduler::SchedulerItem *HOT Scheduler::pop_raw_locked_() {
 
 // Helper to execute a scheduler item
 uint32_t HOT Scheduler::execute_item_(SchedulerItem *item, uint32_t now) {
-  App.set_current_component(item->component);
-  // Freshen so callbacks reading App.get_loop_component_start_time() see this item's dispatch time.
-  App.set_loop_component_start_time_(now);
-  WarnIfComponentBlockingGuard guard{item->component, now};
+  // Resolve the component and (for SELF_POINTER/deferred items) the source name from the shared
+  // union slot with a single name-type check. Self-keyed items have no owning component; their slot
+  // holds the source name (e.g. the owning script), published so deferred work chained inside the
+  // callback re-captures it and the blocking warning can name the script instead of "<null>".
+  Component *component;
+  const LogString *source;
+  if (item->get_name_type() == NameType::SELF_POINTER) {
+    component = nullptr;
+    source = item->source_name;
+  } else {
+    component = item->component;
+    source = nullptr;
+  }
+  // Guard publishes the item's identity + dispatch time, then times the callback.
+  LoopBlockingGuard guard{component, source, now};
   item->callback();
   uint32_t end = guard.finish();
   // Feed the watchdog after each scheduled item (both main heap and defer

esphome/core/scheduler.h

@@ -183,11 +183,12 @@ class Scheduler {
 
  protected:
   struct SchedulerItem {
-    // Ordered by size to minimize padding.
-    // `component` while live; `next_free` while in scheduler_item_pool_head_ (mutually exclusive).
+    // Ordered by size to minimize padding. Mutually exclusive by state; read the component via
+    // get_component() so SELF_POINTER items read as component-less.
     union {
-      Component *component;
-      SchedulerItem *next_free;
+      Component *component;          // live, non-SELF_POINTER: owning component
+      const LogString *source_name;  // live SELF_POINTER: owning script name (log attribution)
+      SchedulerItem *next_free;      // while pooled
     };
     // Optimized name storage using tagged union - zero heap allocation
     union {
@@ -302,14 +303,23 @@ class Scheduler {
       next_execution_high_ = static_cast<uint16_t>(value >> 32);
     }
     constexpr const char *get_type_str() const { return (type == TIMEOUT) ? "timeout" : "interval"; }
-    const LogString *get_source() const { return component ? component->get_component_log_str() : LOG_STR("unknown"); }
+    // The owning component, or nullptr for SELF_POINTER items (whose slot holds source_name instead).
+    // All component access goes through this so SELF_POINTER items read as component-less.
+    Component *get_component() const { return name_type_ == NameType::SELF_POINTER ? nullptr : component; }
+    const LogString *get_source() const {
+      // Same no-source label as warn_blocking, for consistent log vocabulary.
+      if (name_type_ == NameType::SELF_POINTER)
+        return source_name != nullptr ? source_name : LOG_STR("a scheduled task");
+      return component != nullptr ? component->get_component_log_str() : LOG_STR("unknown");
+    }
   };
 
   // Common implementation for both timeout and interval
   // name_type determines storage type: STATIC_STRING uses static_name, others use hash_or_id
+  // `source` is stored (in the union slot) only for SELF_POINTER items; ignored otherwise.
   void set_timer_common_(Component *component, SchedulerItem::Type type, NameType name_type, const char *static_name,
                          uint32_t hash_or_id, uint32_t delay, std::function<void()> &&func, bool is_retry = false,
-                         bool skip_cancel = false);
+                         bool skip_cancel = false, const LogString *source = nullptr);
 
   // Common implementation for retry - Remove before 2026.8.0
   // name_type determines storage type: STATIC_STRING uses static_name, others use hash_or_id
@@ -402,8 +412,10 @@ class Scheduler {
     // Fixes: https://github.com/esphome/esphome/issues/11940
     if (item == nullptr)
       return false;
-    if (item->component != component || item->type != type || (skip_removed && this->is_item_removed_locked_(item)) ||
-        (match_retry && !item->is_retry)) {
+    // get_component() is nullptr for SELF_POINTER items (their cancels pass nullptr too), so they
+    // match by the `this` key alone.
+    if (item->get_component() != component || item->type != type ||
+        (skip_removed && this->is_item_removed_locked_(item)) || (match_retry && !item->is_retry)) {
       return false;
     }
     // Name type must match
@@ -423,11 +435,16 @@ class Scheduler {
   // Helper to execute a scheduler item
   uint32_t execute_item_(SchedulerItem *item, uint32_t now);
 
-  // Helper to check if item should be skipped
-  bool should_skip_item_(SchedulerItem *item) const {
-    return is_item_removed_(item) || (item->component != nullptr && item->component->is_failed());
+  // True if the item's component is failed (so it must not run). SELF_POINTER delays have no
+  // component (get_component() == nullptr) and always fire.
+  bool is_item_failed_(SchedulerItem *item) const {
+    Component *component = item->get_component();
+    return component != nullptr && component->is_failed();
   }
 
+  // Helper to check if item should be skipped
+  bool should_skip_item_(SchedulerItem *item) const { return is_item_removed_(item) || this->is_item_failed_(item); }
+
   // Helper to recycle a SchedulerItem back to the pool.
   // Takes a raw pointer — caller transfers ownership. The item is either added to the
   // pool or deleted if the pool is full.

tests/integration/fixtures/scheduler_blocking_warning.yaml

@@ -0,0 +1,22 @@
+esphome:
+  name: scheduler-blocking-warning
+  on_boot:
+    then:
+      - script.execute: blocking_script
+
+host:
+api:
+logger:
+  level: DEBUG
+
+# The busy-block runs in the second delay's continuation; the warning must name the script. Two
+# delays verify the source survives chained delays (the scheduler republishes it each continuation).
+script:
+  - id: blocking_script
+    then:
+      - delay: 10ms
+      - delay: 10ms
+      - lambda: |-
+          const uint32_t start = millis();
+          while (millis() - start < 80) {
+          }

tests/integration/fixtures/scheduler_blocking_warning_generic_source.yaml

@@ -0,0 +1,30 @@
+esphome:
+  name: scheduler-blocking-generic
+
+host:
+api:
+logger:
+  level: DEBUG
+
+globals:
+  - id: done
+    type: bool
+    restore_value: false
+    initial_value: "false"
+
+# A delay in a plain (non-script) automation has no owning script, so the block must log the
+# generic "a scheduled task" label, not a script name.
+interval:
+  - interval: 100ms
+    id: gen_interval
+    then:
+      - if:
+          condition:
+            lambda: "return !id(done);"
+          then:
+            - lambda: "id(done) = true;"
+            - delay: 10ms
+            - lambda: |-
+                const uint32_t start = millis();
+                while (millis() - start < 80) {
+                }

tests/integration/fixtures/scheduler_delay_runs_on_failed_component.yaml

@@ -0,0 +1,29 @@
+esphome:
+  name: scheduler-delay-failed
+
+host:
+api:
+logger:
+  level: DEBUG
+
+globals:
+  - id: started
+    type: bool
+    restore_value: false
+    initial_value: "false"
+
+# The interval marks itself failed, then schedules a delay. The delay must still fire: a failed
+# component must not drop it, since the SELF_POINTER scheduler item has no owning component.
+interval:
+  - interval: 100ms
+    id: host_interval
+    then:
+      - if:
+          condition:
+            lambda: "return !id(started);"
+          then:
+            - lambda: |-
+                id(started) = true;
+                id(host_interval)->mark_failed();
+            - delay: 200ms
+            - logger.log: "DELAY_FIRED_AFTER_FAIL"

tests/integration/test_scheduler_blocking_warning.py

@@ -0,0 +1,120 @@
+"""Integration tests for blocking-warning source attribution.
+
+A blocking operation that runs inside a deferred scheduler continuation (e.g. after a ``delay``
+in a script) used to be reported as ``<null> took a long time for an operation (NN ms),
+max is 30 ms`` because the continuation carries no component. The warning should instead name
+the owning script and report the real threshold (50 ms).
+"""
+
+from __future__ import annotations
+
+import asyncio
+import re
+
+import pytest
+
+from .types import APIClientConnectedFactory, RunCompiledFunction
+
+# Matches: "<source> took a long time for an operation (NN ms), max is NN ms"
+WARN_PATTERN = re.compile(
+    r"(\S+) took a long time for an operation \((\d+) ms\), max is (\d+) ms"
+)
+
+
+@pytest.mark.asyncio
+async def test_scheduler_blocking_warning(
+    yaml_config: str,
+    run_compiled: RunCompiledFunction,
+    api_client_connected: APIClientConnectedFactory,
+) -> None:
+    """Deferred blocking work inside a script is attributed to the script, not "<null>"."""
+    loop = asyncio.get_running_loop()
+    warning_future: asyncio.Future[str] = loop.create_future()
+
+    def check_output(line: str) -> None:
+        if WARN_PATTERN.search(line) and not warning_future.done():
+            warning_future.set_result(line)
+
+    async with (
+        run_compiled(yaml_config, line_callback=check_output),
+        api_client_connected() as client,
+    ):
+        device_info = await client.device_info()
+        assert device_info is not None
+
+        # on_boot runs the script, which defers via delay then busy-blocks > 50 ms in the
+        # continuation, tripping the blocking warning.
+        warning_line = await asyncio.wait_for(warning_future, timeout=10.0)
+
+    # Must name the owning script, not "<null>" and not the generic fallback.
+    assert "<null>" not in warning_line, (
+        f"Warning should name the script, got: {warning_line}"
+    )
+    assert "a scheduled task" not in warning_line, (
+        f"Warning should name the script, got: {warning_line}"
+    )
+    match = WARN_PATTERN.search(warning_line)
+    assert match is not None
+    assert match.group(1) == "blocking_script", (
+        f"Warning should name 'blocking_script', got: {warning_line}"
+    )
+    # The reported threshold must be the real default (50 ms), not the stale "30 ms".
+    assert match.group(3) == "50", f"Expected 'max is 50 ms', got: {warning_line}"
+
+
+@pytest.mark.asyncio
+async def test_scheduler_blocking_warning_generic_source(
+    yaml_config: str,
+    run_compiled: RunCompiledFunction,
+    api_client_connected: APIClientConnectedFactory,
+) -> None:
+    """A delay in a plain (non-script) automation logs the generic label, not a script name."""
+    loop = asyncio.get_running_loop()
+    warning_future: asyncio.Future[str] = loop.create_future()
+
+    def check_output(line: str) -> None:
+        if WARN_PATTERN.search(line) and not warning_future.done():
+            warning_future.set_result(line)
+
+    async with (
+        run_compiled(yaml_config, line_callback=check_output),
+        api_client_connected() as client,
+    ):
+        assert await client.device_info() is not None
+        warning_line = await asyncio.wait_for(warning_future, timeout=10.0)
+
+    assert "a scheduled task took a long time" in warning_line, (
+        f"Non-script deferred work should log the generic label, got: {warning_line}"
+    )
+    assert "<null>" not in warning_line
+    match = WARN_PATTERN.search(warning_line)
+    assert match is not None and match.group(3) == "50", (
+        f"Expected 'max is 50 ms', got: {warning_line}"
+    )
+
+
+@pytest.mark.asyncio
+async def test_scheduler_delay_runs_on_failed_component(
+    yaml_config: str,
+    run_compiled: RunCompiledFunction,
+    api_client_connected: APIClientConnectedFactory,
+) -> None:
+    """A delay must still fire even when its context component is marked failed.
+
+    Deferred (SELF_POINTER) scheduler items have no owning component, so the scheduler's
+    failed-component skip must not drop them.
+    """
+    loop = asyncio.get_running_loop()
+    fired: asyncio.Future[bool] = loop.create_future()
+
+    def check_output(line: str) -> None:
+        if "DELAY_FIRED_AFTER_FAIL" in line and not fired.done():
+            fired.set_result(True)
+
+    async with (
+        run_compiled(yaml_config, line_callback=check_output),
+        api_client_connected() as client,
+    ):
+        assert await client.device_info() is not None
+        # If the failed host component wrongly dropped the delay, this times out.
+        await asyncio.wait_for(fired, timeout=10.0)