rocm-systems/tests/src/runtimeApi/stream/hipStreamSync2.cpp

/*
Copyright (c) 2015-2016 Advanced Micro Devices, Inc. All rights reserved.
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The above copyright notice and this permission notice shall be included in
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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*/

/* HIT_START
 * BUILD: %t %s ../../test_common.cpp
 * RUN: %t
 * HIT_END
 */


#include "test_common.h"

enum SyncMode {
    syncNone,
    syncNullStream,
    syncOtherStream,
    syncMarkerThenOtherStream,
    syncMarkerThenOtherNonBlockingStream,
    syncDevice
};


const char *syncModeString(int syncMode) {
    switch (syncMode) {
        case syncNone:
            return "syncNone";
        case syncNullStream:
            return "syncNullStream";
        case syncOtherStream:
            return "syncOtherStream";
        case syncMarkerThenOtherStream:
            return "syncMarkerThenOtherStream";
        case syncMarkerThenOtherNonBlockingStream:
            return "syncMarkerThenOtherNonBlockingStream";
        case syncDevice:
            return "syncDevice";
        default:
            return "unknown";
    };
};


void test(unsigned testMask, int *C_d, int *C_h, int64_t numElements, SyncMode syncMode, bool expectMismatch)
{

    // This test sends a long-running kernel to the null stream, then tests to see if the
    // specified synchronization technique is effective.
    //
    // Some syncMode are not expected to correctly sync (for example "syncNone").  in these
    // cases the test sets expectMismatch and the check logic below will attempt to ensure that
    // the undesired synchronization did not occur - ie ensure the kernel is still running and did
    // not yet update the stop event.  This can be tricky since if the kernel runs fast enough it
    // may complete before the check.  To prevent this, the addCountReverse has a count parameter
    // which causes it to loop repeatedly, and the results are checked in reverse order.
    //
    // Tests with expectMismatch=true should ensure the kernel finishes correctly. This results
    // are checked and we test to make sure stop event has completed.

    if (!(testMask & p_tests)) {
        return;
    }
    printf ("\ntest 0x%02x: syncMode=%s expectMismatch=%d\n",
            testMask, syncModeString(syncMode), expectMismatch);

    size_t sizeBytes = numElements * sizeof(int);

    int count =100;
    int init0 = 0;
    HIPCHECK(hipMemset(C_d, init0, sizeBytes));
    for (int i=0; i<numElements; i++) {
        C_h[i] = -1; // initialize
    }

    hipStream_t otherStream = 0;
    unsigned flags = (syncMode == syncMarkerThenOtherNonBlockingStream) ?  hipStreamNonBlocking : hipStreamDefault;
    HIPCHECK(hipStreamCreateWithFlags(&otherStream, flags));
    hipEvent_t stop, otherStreamEvent;
    HIPCHECK(hipEventCreate(&stop));
    HIPCHECK(hipEventCreate(&otherStreamEvent));


    unsigned blocks = HipTest::setNumBlocks(blocksPerCU, threadsPerBlock, numElements);
    // Launch kernel into null stream, should result in C_h == count.
    hipLaunchKernelGGL(HipTest::addCountReverse , dim3(blocks), dim3(threadsPerBlock), 0, 0 /*stream*/,    C_d, C_h, numElements, count);
    HIPCHECK(hipEventRecord(stop, 0/*default*/));

    switch (syncMode) {
        case syncNone:
            break;
        case syncNullStream:
            HIPCHECK(hipStreamSynchronize(0));  // wait on host for null stream:
            break;
        case syncOtherStream:
            // Does this synchronize with the null stream?
            HIPCHECK(hipStreamSynchronize(otherStream));
            break;
        case syncMarkerThenOtherStream:
        case syncMarkerThenOtherNonBlockingStream:

            // this may wait for NULL stream depending hipStreamNonBlocking flag above
            HIPCHECK(hipEventRecord(otherStreamEvent, otherStream));

            HIPCHECK(hipStreamSynchronize(otherStream));
            break;
        case syncDevice:
            HIPCHECK(hipDeviceSynchronize());
            break;
        default:
            assert(0);
    };

    hipError_t done = hipEventQuery(stop);

    if (expectMismatch) {
        assert (done == hipErrorNotReady);
    } else {
        assert (done == hipSuccess);
    }

    int mismatches = 0;
    int expected = init0 + count;
    for (int i=0; i<numElements; i++) {
        bool compareEqual = (C_h[i] == expected);
        if (!compareEqual) {
            mismatches ++;
            if  (!expectMismatch) {
                printf ("C_h[%d] (%d) != %d\n", i, C_h[i], expected);
                assert(C_h[i] == expected);
            }
        }
    }

    if (expectMismatch) {
        assert (mismatches > 0);
    }


    HIPCHECK(hipStreamDestroy(otherStream));
    HIPCHECK(hipEventDestroy(stop));
    HIPCHECK(hipEventDestroy(otherStreamEvent));

    HIPCHECK(hipDeviceSynchronize());

    printf ("test:   OK - %d mismatches (%6.2f%%)\n",  mismatches, ((double)(mismatches)*100.0)/numElements);
}


void runTests(int64_t numElements)
{
    size_t sizeBytes = numElements * sizeof(int);

    printf ("\n\ntest: starting sequence with sizeBytes=%zu bytes, %6.2f MB\n", sizeBytes, sizeBytes/1024.0/1024.0);


    int *C_h, *C_d;
    HIPCHECK(hipMalloc(&C_d, sizeBytes));
    HIPCHECK(hipHostMalloc(&C_h, sizeBytes));


    {
        test (0x01, C_d, C_h, numElements,  syncNone,                             true /*expectMismatch*/);
        test (0x02, C_d, C_h, numElements,  syncNullStream,                       false /*expectMismatch*/);
        test (0x04, C_d, C_h, numElements,  syncOtherStream,                      true /*expectMismatch*/);
        test (0x08, C_d, C_h, numElements,  syncDevice,                           false /*expectMismatch*/);

        // Sending a marker to to null stream may synchronize the otherStream
        //  - other created with hipStreamNonBlocking=0 : synchronization, should match
        //  - other created with hipStreamNonBlocking=1 : no synchronization, may mismatch
        test (0x10, C_d, C_h, numElements,  syncMarkerThenOtherStream,            false /*expectMismatch*/);

        // TODO - review why this test seems flaky
        //test (0x20, C_d, C_h, numElements,  syncMarkerThenOtherNonBlockingStream, true /*expectMismatch*/);
    }


    HIPCHECK(hipFree(C_d));
    HIPCHECK(hipHostFree(C_h));
}


int main(int argc, char *argv[])
{
    // Can' destroy the default stream:// TODO - move to another test
    HIPCHECK_API(hipStreamDestroy(0), hipErrorInvalidResourceHandle);

    HipTest::parseStandardArguments(argc, argv, true /*failOnUndefinedArg*/);

    runTests(40000000);

    passed();
}