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SPU: Disable notification if no changes were made in PUTLLC

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This commit is contained in:
Eladash 2022-08-19 01:41:13 +03:00 committed by Ivan
parent 28bec8e1bf
commit b0e2c959eb
1 changed files with 10 additions and 5 deletions
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11
rpcs3/Emu/Cell/SPUThread.cpp
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@ -2821,6 +2821,7 @@ bool spu_thread::do_putllc(const spu_mfc_cmd& args)
if (cmp_rdata(to_write, rdata))
{
// Writeback of unchanged data. Only check memory change
raddr = 0; // Disable notification
return cmp_rdata(rdata, vm::_ref<spu_rdata_t>(addr)) && res.compare_and_swap_test(rtime, rtime + 128);
}
@ -2951,9 +2952,13 @@ bool spu_thread::do_putllc(const spu_mfc_cmd& args)
return success;
}())
{
if (raddr)
{
vm::reservation_notifier(addr).notify_all(-128);
raddr = 0;
}
perf0.reset();
return true;
}
@ -3422,15 +3427,15 @@ bool spu_thread::process_mfc_cmd()
else
{
// Check if we can reuse our existing reservation
if (rtime == vm::reservation_acquire(addr) && cmp_rdata(rdata, data) && rtime == vm::reservation_acquire(addr) && cmp_rdata(rdata, data))
if (rtime == vm::reservation_acquire(addr) && cmp_rdata(rdata, data))
{
mov_rdata(_ref<spu_rdata_t>(ch_mfc_cmd.lsa & 0x3ff80), rdata);
ch_atomic_stat.set_value(MFC_GETLLAR_SUCCESS);
// Need to check twice for it to be accurate, the code is before and not not after this check for:
// Need to check twice for it to be accurate, the code is before and not after this check for:
// 1. Reduce time between reservation accesses so TSX panelty would be lowered
// 2. Increase the chance of change detection: if GETLLAR has been called again new data is probably wanted
if (rtime == vm::reservation_acquire(addr) && cmp_rdata(rdata, data))
if (!g_cfg.core.spu_accurate_getllar || (rtime == vm::reservation_acquire(addr) && cmp_rdata(rdata, data)))
{
// Validation that it is indeed GETLLAR busy-waiting (large time window is intentional)
if ((g_cfg.core.spu_reservation_busy_waiting && !g_use_rtm) || last_getllar != pc || perf0.get() - last_gtsc >= 50'000)