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locking and iterating through queues is expensive so added flag that indicates if there is any interrupt pending

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folkert van heusden 2023-03-27 09:26:10 +02:00
parent 4bdc5272b2
commit 2563bbac57
Signed by untrusted user who does not match committer: folkert
GPG key ID: 6B6455EDFEED3BD1
2 changed files with 8 additions and 3 deletions
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10
cpu.cpp
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@ -278,7 +278,9 @@ bool cpu::check_queued_interrupts()
return true; return true;
} }
} }
any_queued_interrupts = false;
return false; return false;
} }
@ -292,6 +294,8 @@ void cpu::queue_interrupt(const uint8_t level, const uint8_t vector)
qi_cv.notify_all(); qi_cv.notify_all();
any_queued_interrupts = true;
DOLOG(debug, true, "Queueing interrupt vector %o (IPL %d, current: %d), n: %zu", vector, level, getPSW_spl(), it->second.size()); DOLOG(debug, true, "Queueing interrupt vector %o (IPL %d, current: %d), n: %zu", vector, level, getPSW_spl(), it->second.size());
} }
@ -2159,8 +2163,8 @@ void cpu::step_a()
if ((b->getMMR0() & 0160000) == 0) if ((b->getMMR0() & 0160000) == 0)
b->clearMMR1(); b->clearMMR1();
if (check_queued_interrupts()) if (any_queued_interrupts && check_queued_interrupts())
return; return; // documentation
} }
void cpu::step_b() void cpu::step_b()

1
cpu.h
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@ -43,6 +43,7 @@ private:
std::map<uint8_t, std::set<uint8_t> > queued_interrupts; std::map<uint8_t, std::set<uint8_t> > queued_interrupts;
std::mutex qi_lock; std::mutex qi_lock;
std::condition_variable qi_cv; std::condition_variable qi_cv;
std::atomic_bool any_queued_interrupts { false };
std::set<uint16_t> breakpoints; std::set<uint16_t> breakpoints;