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5dc8e3fbca
Thanks to Moore, Branden <Branden.Moore@amd.com> for identifying the race condition and suggesting the changes to fix the same Existing Design: - AOCL progress callback pointer is a global pointer which is shared across all threads Existing Design challenges: - The callback function cannot safely disable the progress mechanism, as another thread may have already checked to see if the function pointer is set, and then re-reads the pointer upon invocation of the callback. If one thread sets the callback to NULL in this time, then the resulting thread will attempt to call the null pointer as a function pointer, leading to a segfault. New Design : - Each thread maintains a local copy of progress pointer AMD-Internal: [SWLCSG-1971] Change-Id: I282989805a4a2a8a759a7373b645f3569bf42ed4
63 lines
2.7 KiB
C
63 lines
2.7 KiB
C
/*
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BLIS
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An object-based framework for developing high-performance BLAS-like
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libraries.
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Copyright (C) 2022-2023, Advanced Micro Devices, Inc. All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are
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met:
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- Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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- Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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- Neither the name(s) of the copyright holder(s) nor the names of its
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contributors may be used to endorse or promote products derived
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from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef BLI_UTIL_PROGRESS_H
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#define BLI_UTIL_PROGRESS_H
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// Public interface for the end user.
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typedef dim_t (*AOCL_progress_callback)(const char* const api,
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const dim_t lapi,
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const dim_t progress,
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const dim_t current_thread,
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const dim_t total_threads);
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BLIS_EXPORT_BLIS void AOCL_BLIS_set_progress(AOCL_progress_callback func);
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// Private interfaces for internal use
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// AOCL_progress_ptr can be updated by any of the thread outside blis
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// hence volatile keyword is being used to warn compiler not optimise
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extern volatile AOCL_progress_callback AOCL_progress_ptr;
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extern BLIS_TLS_TYPE dim_t tls_aoclprogress_counter;
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extern BLIS_TLS_TYPE dim_t tls_aoclprogress_last_update;
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// Define the frequency of reporting (number of elements).
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// Progress update will be sent only after these many
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// elements are processed in the current thread.
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#define AOCL_PROGRESS_FREQUENCY 1e+9
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#endif // BLI_UTIL_PROGRESS_H
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