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9804adfd40
Details: - Added a new configure option, --[en|dis]able-packbuf-pools, which will enable or disable the use of internal memory pools for managing buffers used for packing. When disabled, the function specified by the cpp macro BLIS_MALLOC_POOL is called whenever a packing buffer is needed (and BLIS_FREE_POOL is called when the buffer is ready to be released, usually at the end of a loop). When enabled, which was the status quo prior to this commit, a memory pool data structure is created and managed to provide threads with packing buffers. The memory pool minimizes calls to bli_malloc_pool() (i.e., the wrapper that calls BLIS_MALLOC_POOL), but does so through a somewhat more complex mechanism that may incur additional overhead in some (but not all) situations. The new option defaults to --enable-packbuf-pools. - Removed the reinitialization of the memory pools from the level-3 front-ends and replaced it with automatic reinitialization within the pool API's implementation. This required an extra argument to bli_pool_checkout_block() in the form of a requested size, but hides the complexity entirely from BLIS. And since bli_pool_checkout_block() is only ever called within a critical section, this change fixes a potential race condition in which threads using contexts with different cache blocksizes--most likely a heterogeneous environment--can check out pool blocks that are too small for the submatrices it wishes to pack. Thanks to Nisanth Padinharepatt for reporting this potential issue. - Removed several functions in light of the relocation of pool reinit, including bli_membrk_reinit_pools(), bli_memsys_reinit(), bli_pool_reinit_if(), and bli_check_requested_block_size_for_pool(). - Updated the testsuite to print whether the memory pools are enabled or disabled.
103 lines
3.3 KiB
C
103 lines
3.3 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) 2014, The University of Texas at Austin
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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 of The University of Texas at Austin nor the names
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of its contributors may be used to endorse or promote products
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derived 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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#include "blis.h"
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void bli_syrk_front
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(
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obj_t* alpha,
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obj_t* a,
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obj_t* beta,
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obj_t* c,
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cntx_t* cntx,
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cntl_t* cntl
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)
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{
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bli_init_once();
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obj_t a_local;
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obj_t at_local;
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obj_t c_local;
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// Check parameters.
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if ( bli_error_checking_is_enabled() )
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bli_syrk_check( alpha, a, beta, c, cntx );
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// If alpha is zero, scale by beta and return.
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if ( bli_obj_equals( alpha, &BLIS_ZERO ) )
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{
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bli_scalm( beta, c );
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return;
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}
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// Alias A and C in case we need to apply transformations.
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bli_obj_alias_to( *a, a_local );
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bli_obj_alias_to( *c, c_local );
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bli_obj_set_as_root( c_local );
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// For syrk, the right-hand "B" operand is simply A^T.
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bli_obj_alias_to( *a, at_local );
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bli_obj_induce_trans( at_local );
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// An optimization: If C is stored by rows and the micro-kernel prefers
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// contiguous columns, or if C is stored by columns and the micro-kernel
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// prefers contiguous rows, transpose the entire operation to allow the
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// micro-kernel to access elements of C in its preferred manner.
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if ( bli_cntx_l3_ukr_dislikes_storage_of( &c_local, BLIS_GEMM_UKR, cntx ) )
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{
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bli_obj_induce_trans( c_local );
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}
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// Record the threading for each level within the context.
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bli_cntx_set_thrloop_from_env( BLIS_SYRK, BLIS_LEFT, cntx,
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bli_obj_length( c_local ),
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bli_obj_width( c_local ),
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bli_obj_width( a_local ) );
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// Invoke the internal back-end.
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bli_l3_thread_decorator
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(
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bli_gemm_int,
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BLIS_HERK, // operation family id
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alpha,
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&a_local,
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&at_local,
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beta,
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&c_local,
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cntx,
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cntl
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);
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}
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