johnmccutchan@google.com
919dc2d6eb
* Threads can only register and unregister themselves with ThreadInterrupter. * Profiler is no longer involved in interrupting threads. It's just a callback and the buffer. * Profiler operates lock free using an atomic operation to reserve sample in sample buffer. * Linux, Mac, and Windows done. R=asiva@google.com Review URL: https://codereview.chromium.org//109803002 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@31170 260f80e4-7a28-3924-810f-c04153c831b5
66 lines
2.2 KiB
C++
66 lines
2.2 KiB
C++
// Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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#include "platform/assert.h"
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#include "vm/dart_api_impl.h"
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#include "vm/dart_api_state.h"
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#include "vm/globals.h"
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#include "vm/thread_interrupter.h"
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#include "vm/unit_test.h"
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namespace dart {
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class ThreadInterrupterTestHelper : public AllStatic {
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public:
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static void InterruptTest(const intptr_t run_time, const intptr_t period) {
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const double allowed_error = 0.25; // +/- 25%
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intptr_t count = 0;
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ThreadInterrupter::Unregister();
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ThreadInterrupter::SetInterruptPeriod(period);
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ThreadInterrupter::Register(IncrementCallback, &count);
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OS::Sleep(run_time * kMillisecondsPerSecond);
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ThreadInterrupter::Unregister();
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intptr_t run_time_micros = run_time * kMicrosecondsPerSecond;
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intptr_t expected_interrupts = run_time_micros / period;
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intptr_t error = allowed_error * expected_interrupts;
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intptr_t low_bar = expected_interrupts - error;
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intptr_t high_bar = expected_interrupts + error;
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EXPECT_GE(count, low_bar);
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EXPECT_LE(count, high_bar);
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}
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static void IncrementCallback(const InterruptedThreadState& state,
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void* data) {
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ASSERT(data != NULL);
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intptr_t* counter = reinterpret_cast<intptr_t*>(data);
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*counter = *counter + 1;
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}
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};
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TEST_CASE(ThreadInterrupterHigh) {
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const intptr_t kRunTimeSeconds = 5;
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const intptr_t kInterruptPeriodMicros = 250;
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ThreadInterrupterTestHelper::InterruptTest(kRunTimeSeconds,
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kInterruptPeriodMicros);
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}
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TEST_CASE(ThreadInterrupterMedium) {
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const intptr_t kRunTimeSeconds = 5;
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const intptr_t kInterruptPeriodMicros = 500;
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ThreadInterrupterTestHelper::InterruptTest(kRunTimeSeconds,
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kInterruptPeriodMicros);
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}
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TEST_CASE(ThreadInterrupterLow) {
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const intptr_t kRunTimeSeconds = 5;
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const intptr_t kInterruptPeriodMicros = 1000;
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ThreadInterrupterTestHelper::InterruptTest(kRunTimeSeconds,
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kInterruptPeriodMicros);
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}
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} // namespace dart
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