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Code Issues Releases Wiki Activity

Reduce RAM usage for scheduled tasks

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This commit is contained in:
J. Nick Koston
2025-06-23 00:03:01 +02:00
parent 788803d588
commit 99b1b079d0
2 changed files with 10 additions and 2 deletions
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4
esphome/core/scheduler.cpp
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@@ -319,13 +319,17 @@ bool HOT Scheduler::cancel_item_(Component *component, const std::string &name,
return ret;
}
uint64_t Scheduler::millis_() {
// Get the current 32-bit millis value
const uint32_t now = millis();
// Check for rollover by comparing with last value
if (now < this->last_millis_) {
// Detected rollover (happens every ~49.7 days)
this->millis_major_++;
ESP_LOGD(TAG, "Incrementing scheduler major at %" PRIu64 "ms",
now + (static_cast<uint64_t>(this->millis_major_) << 32));
}
this->last_millis_ = now;
// Combine major (high 32 bits) and now (low 32 bits) into 64-bit time
return now + (static_cast<uint64_t>(this->millis_major_) << 32);
}

8
esphome/core/scheduler.h
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@@ -29,12 +29,16 @@ class Scheduler {
protected:
struct SchedulerItem {
// Ordered by size to minimize padding
Component *component;
std::string name;
enum Type { TIMEOUT, INTERVAL } type;
uint32_t interval;
// 64-bit time to handle millis() rollover. The scheduler combines the 32-bit millis()
// with a 16-bit rollover counter to create a 64-bit time that won't roll over for
// billions of years. This ensures correct scheduling even when devices run for months.
uint64_t next_execution_;
std::string name;
std::function<void()> callback;
enum Type : uint8_t { TIMEOUT, INTERVAL } type;
bool remove;
static bool cmp(const std::unique_ptr<SchedulerItem> &a, const std::unique_ptr<SchedulerItem> &b);