From d0883027d60c0d6d289e23900972cfa067fc9c54 Mon Sep 17 00:00:00 2001 From: Lioncash Date: Mon, 28 Nov 2022 16:05:59 -0500 Subject: [PATCH] syncpoint_manager: Reduce number of bounds checks The only time we need to check bounds is on the first access. --- .../service/nvdrv/core/syncpoint_manager.cpp | 42 ++++++++++++------- 1 file changed, 28 insertions(+), 14 deletions(-) diff --git a/src/core/hle/service/nvdrv/core/syncpoint_manager.cpp b/src/core/hle/service/nvdrv/core/syncpoint_manager.cpp index eda2041a0..8d14116d5 100644 --- a/src/core/hle/service/nvdrv/core/syncpoint_manager.cpp +++ b/src/core/hle/service/nvdrv/core/syncpoint_manager.cpp @@ -28,13 +28,15 @@ SyncpointManager::SyncpointManager(Tegra::Host1x::Host1x& host1x_) : host1x{host SyncpointManager::~SyncpointManager() = default; u32 SyncpointManager::ReserveSyncpoint(u32 id, bool client_managed) { - if (syncpoints.at(id).reserved) { + auto& syncpoint = syncpoints.at(id); + + if (syncpoint.reserved) { ASSERT_MSG(false, "Requested syncpoint is in use"); return 0; } - syncpoints.at(id).reserved = true; - syncpoints.at(id).interface_managed = client_managed; + syncpoint.reserved = true; + syncpoint.interface_managed = client_managed; return id; } @@ -56,8 +58,9 @@ u32 SyncpointManager::AllocateSyncpoint(bool client_managed) { void SyncpointManager::FreeSyncpoint(u32 id) { std::lock_guard lock(reservation_lock); - ASSERT(syncpoints.at(id).reserved); - syncpoints.at(id).reserved = false; + auto& syncpoint = syncpoints.at(id); + ASSERT(syncpoint.reserved); + syncpoint.reserved = false; } bool SyncpointManager::IsSyncpointAllocated(u32 id) { @@ -82,40 +85,51 @@ bool SyncpointManager::HasSyncpointExpired(u32 id, u32 threshold) const { } u32 SyncpointManager::IncrementSyncpointMaxExt(u32 id, u32 amount) { - if (!syncpoints.at(id).reserved) { + auto& syncpoint = syncpoints.at(id); + + if (!syncpoint.reserved) { ASSERT(false); return 0; } - return syncpoints.at(id).counter_max += amount; + return syncpoint.counter_max += amount; } u32 SyncpointManager::ReadSyncpointMinValue(u32 id) { - if (!syncpoints.at(id).reserved) { + auto& syncpoint = syncpoints.at(id); + + if (!syncpoint.reserved) { ASSERT(false); return 0; } - return syncpoints.at(id).counter_min; + return syncpoint.counter_min; } u32 SyncpointManager::UpdateMin(u32 id) { - if (!syncpoints.at(id).reserved) { + auto& syncpoint = syncpoints.at(id); + + if (!syncpoint.reserved) { ASSERT(false); return 0; } - syncpoints.at(id).counter_min = host1x.GetSyncpointManager().GetHostSyncpointValue(id); - return syncpoints.at(id).counter_min; + syncpoint.counter_min = host1x.GetSyncpointManager().GetHostSyncpointValue(id); + return syncpoint.counter_min; } NvFence SyncpointManager::GetSyncpointFence(u32 id) { - if (!syncpoints.at(id).reserved) { + auto& syncpoint = syncpoints.at(id); + + if (!syncpoint.reserved) { ASSERT(false); return NvFence{}; } - return {.id = static_cast(id), .value = syncpoints.at(id).counter_max}; + return { + .id = static_cast(id), + .value = syncpoint.counter_max, + }; } } // namespace Service::Nvidia::NvCore