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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 00:47:55 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-19 00:47:55 +0000 |
commit | 26a029d407be480d791972afb5975cf62c9360a6 (patch) | |
tree | f435a8308119effd964b339f76abb83a57c29483 /hal/cocoa/CocoaHeterogeneousCpuInfo.cpp | |
parent | Initial commit. (diff) | |
download | firefox-26a029d407be480d791972afb5975cf62c9360a6.tar.xz firefox-26a029d407be480d791972afb5975cf62c9360a6.zip |
Adding upstream version 124.0.1.upstream/124.0.1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'hal/cocoa/CocoaHeterogeneousCpuInfo.cpp')
-rw-r--r-- | hal/cocoa/CocoaHeterogeneousCpuInfo.cpp | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/hal/cocoa/CocoaHeterogeneousCpuInfo.cpp b/hal/cocoa/CocoaHeterogeneousCpuInfo.cpp new file mode 100644 index 0000000000..065a25b930 --- /dev/null +++ b/hal/cocoa/CocoaHeterogeneousCpuInfo.cpp @@ -0,0 +1,59 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim: set ts=8 sts=2 et sw=2 tw=80: */ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at https://mozilla.org/MPL/2.0/. */ + +#include "Hal.h" +#include "HalTypes.h" +#include <sys/types.h> +#include <sys/sysctl.h> +#include "mozilla/BitSet.h" + +namespace mozilla::hal_impl { + +mozilla::Maybe<hal::HeterogeneousCpuInfo> CreateHeterogeneousCpuInfo() { +#ifdef __aarch64__ + // As of now on Apple Silicon the number of *.logicalcpu_max is the same as + // *.physicalcpu_max. + size_t len = sizeof(uint32_t); + uint32_t pCores = 0; + if (sysctlbyname("hw.perflevel0.logicalcpu_max", &pCores, &len, nullptr, 0)) { + return Nothing(); + } + + len = sizeof(uint32_t); + uint32_t eCores = 0; + if (sysctlbyname("hw.perflevel1.logicalcpu_max", &eCores, &len, nullptr, 0)) { + return Nothing(); + } + + hal::HeterogeneousCpuInfo info; + info.mTotalNumCpus = pCores + eCores; + + // The API has currently a limit how many cpu cores it can tell about. + for (uint32_t i = 0; i < hal::HeterogeneousCpuInfo::MAX_CPUS; ++i) { + if (pCores) { + --pCores; + info.mBigCpus[i] = true; + } else if (eCores) { + --eCores; + info.mLittleCpus[i] = true; + } else { + break; + } + } + + return Some(info); +#else + return Nothing(); +#endif +} + +const Maybe<hal::HeterogeneousCpuInfo>& GetHeterogeneousCpuInfo() { + static const Maybe<hal::HeterogeneousCpuInfo> cpuInfo = + CreateHeterogeneousCpuInfo(); + return cpuInfo; +} + +} // namespace mozilla::hal_impl |