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io_scheduler inline schedule_fd eventfd bug fix (#82)

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The eventfd shutdown_fd was being reset instead of the schedule_fd,
this was causing a 100% cpu churn on scheduling the first task when
in inline mode.  This fixes it, and confirmed the throughput on the
inline scheduler has jumped quite a bit consistently.
This commit is contained in:
Josh Baldwin 2021-04-25 18:45:34 -06:00 • committed by GitHub
parent e9b225e42f
commit 310abc18bc
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1 changed files with 1 additions and 1 deletions
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src/io_scheduler.cpp
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@ -309,7 +309,7 @@ auto io_scheduler::process_scheduled_execute_inline() -> void
// Clear the schedule eventfd if this is a scheduled task.
eventfd_t value{0};
eventfd_read(m_shutdown_fd, &value);
eventfd_read(m_schedule_fd, &value);
// Clear the in memory flag to reduce eventfd_* calls on scheduling.
m_schedule_fd_triggered.exchange(false, std::memory_order::release);