It stores the pointer, not an offset (that would be an alternative approach).

Benchmarks should allocate with cacheline (often 64 bytes) alignment
to avoid unreliable timings. This technique, storing the offset in the
byte before the pointer, doesn't require C11's aligned_alloc for
compatibility with older compilers.

For example, Glibc's x86_64 malloc returns 16-byte aligned buffers, which is
not sufficient for AVX/AVX2 (32-byte preferred) or AVX512 (64-byte).

Fixes #3439

Add lower limit for multithreading in xSYRK

to fix linking problems with (at least) the AMD version of flang that creates dependencies on more than just the fortran runtime.

This patch is to enable benchtest for half precision gemm
when BUILD_HALF is set during make.

[description]: when the matrix size goes higher than 5800 during the cpotrf test, error info, such as "Potrf info = 5679", will be returned on ARM64 and x86 machines. Uplo = L & F.
[solution]: changed the func for building the matrix so that the complex Hermitian matrix can stay positive definite during the computation.
[dts]:

[OpenBLAS]: benchmark for her/her2 LEVEL2 functions

[OpenBlas]: Add benchmark tpsv file and modify benchmark/Makefile

[description]: benchmark for her/her2
[solution]: added benchmark for her/her2, modified makefile in benchmark
[dts]:

[OpenBLAS]:fix the iamax benchmark error

Add benchmark for SPMV and fix segmentation fault when data size >= 50000

[Description]: Solve lack of tpsv benchmark.

[Description]:the result for i?amax is not MFlops, it is MBytes

[Description]:Solve the problem of missing tpmv.c benchmark file

Fix  pr #2487 error

add benchmark for axpby test

add benchmark for csrot and zdrot

Remove redundant code

modified:   benchmark/Makefile
	modified:   benchmark/rot.c

benchmark/hpmv&hbmv: add benchmark/hpmv.c and benchmark/hbmv.c

Add benchmark file rotm.c and modify benchmark/Makefile to test s/drotm

add benchmark for trsv

Add syr2 benchmark

Signed-off-by: Xuqiang Chen chenxuqiang3@hisilicon.com

modified:   benchmark/Makefile
	new file:   benchmark/rotm.c