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kern/test: add some scheduler tests (yields work correctly, all non-special priorities are cooperative/not pre-emptive

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Michael Scire 2021-10-22 17:27:35 -07:00 • committed by SciresM
parent ad03be9a38
commit 1f8bf41f0b
8 changed files with 514 additions and 9 deletions
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91
tests/TestSvc/source/test_preemption_priority.cpp Normal file
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/*
* Copyright (c) Atmosphère-NX
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stratosphere.hpp>
#include "util_common.hpp"
#include "util_scoped_heap.hpp"
namespace ams::test {
namespace {
constinit volatile bool g_spinloop;
void TestPreemptionPriorityThreadFunction(volatile bool *executed) {
/* While we should, note that we're executing. */
while (g_spinloop) {
__asm__ __volatile__("" ::: "memory");
*executed = true;
__asm__ __volatile__("" ::: "memory");
}
/* Exit the thread. */
svc::ExitThread();
}
}
CATCH_TEST_CASE( "The scheduler is preemptive at the preemptive priority and cooperative for all other priorities" ) {
/* Create heap. */
ScopedHeap heap(3 * os::MemoryPageSize);
CATCH_REQUIRE(R_SUCCEEDED(svc::SetMemoryPermission(heap.GetAddress() + os::MemoryPageSize, os::MemoryPageSize, svc::MemoryPermission_None)));
ON_SCOPE_EXIT {
CATCH_REQUIRE(R_SUCCEEDED(svc::SetMemoryPermission(heap.GetAddress() + os::MemoryPageSize, os::MemoryPageSize, svc::MemoryPermission_ReadWrite)));
};
const uintptr_t sp_0 = heap.GetAddress() + 1 * os::MemoryPageSize;
const uintptr_t sp_1 = heap.GetAddress() + 3 * os::MemoryPageSize;
for (s32 core = 0; core < NumCores; ++core) {
for (s32 priority = HighestTestPriority; priority <= LowestTestPriority; ++priority) {
svc::Handle thread_handles[2];
volatile bool thread_executed[2] = { false, false };
/* Start spinlooping. */
g_spinloop = true;
/* Create threads. */
CATCH_REQUIRE(R_SUCCEEDED(svc::CreateThread(thread_handles + 0, reinterpret_cast<uintptr_t>(&TestPreemptionPriorityThreadFunction), reinterpret_cast<uintptr_t>(thread_executed + 0), sp_0, priority, core)));
CATCH_REQUIRE(R_SUCCEEDED(svc::CreateThread(thread_handles + 1, reinterpret_cast<uintptr_t>(&TestPreemptionPriorityThreadFunction), reinterpret_cast<uintptr_t>(thread_executed + 1), sp_1, priority, core)));
/* Start threads. */
CATCH_REQUIRE(R_SUCCEEDED(svc::StartThread(thread_handles[0])));
CATCH_REQUIRE(R_SUCCEEDED(svc::StartThread(thread_handles[1])));
/* Wait long enough that we can be confident the threads have been balanced. */
svc::SleepThread(PreemptionTimeSpan.GetNanoSeconds() * 10);
/* Check that we're in a coherent state. */
if (IsPreemptionPriority(core, priority)) {
CATCH_REQUIRE(thread_executed[0] & thread_executed[1]);
} else {
CATCH_REQUIRE(thread_executed[0] ^ thread_executed[1]);
}
/* Stop spinlooping. */
g_spinloop = false;
/* Wait for threads to exit. */
s32 dummy;
CATCH_REQUIRE(R_SUCCEEDED(svc::WaitSynchronization(std::addressof(dummy), thread_handles + 0, 1, -1)));
CATCH_REQUIRE(R_SUCCEEDED(svc::WaitSynchronization(std::addressof(dummy), thread_handles + 1, 1, -1)));
/* Close thread handles. */
CATCH_REQUIRE(R_SUCCEEDED(svc::CloseHandle(thread_handles[0])));
CATCH_REQUIRE(R_SUCCEEDED(svc::CloseHandle(thread_handles[1])));
}
}
}
}