- Implemented 12x4m column preferential SUP kernels(main and fringe
cases). The main kernel dimension is 12x4, and the associated fringe
kernel dimensions are : 12x3m, 12x2m, 12x1m
8x4, 8x3, 8x2, 8x1
4x4, 4x3, 4x2, 4x1
2x4, 2x3, 2x2, 2x1.
- Included in-register transposition support for C, thus extending
the storage scheme supports to CCC, CCR, RCC and RCR inside the
milli-kernel.
- Integrated conditional packing of A onto the SUP front end for
dcomplex datatype. This redirects RRC and CRC storage schemes
onto the preceding set of SUP kernels through storage scheme
transformation(RCC and CCC respectively).
- Updated the zen4 context file with the new set of SUP kernels, to
get enabled appropriately. Furthermore, the context file was updated
with the AVX-2 dotxv signatures for dcomplex datatype. This redirects
the fringe cases of type 1x? to the pre-existing AVX-2 GEMV routines.
- Added C prefetching onto L2-cache, and an unroll factor of 4 for the
k loop in all the kernels.
- Work in progress to include conjugate support and input spectrum
extension for the AVX-512 SUP kernels. The current thresholds in zen4
context is the same as that of the zen3 thresholds for ZGEMM SUP.
AMD-Internal: [CPUPL-3122]
Change-Id: If40bc4409c6eb188765329508cf1f24c0eb12d1e
Fixes for a couple of issues:
- Modify alpha argument in kernel call in zscal_blis_impl to
avoid compiler warning message about discarding 'const'
qualifier from pointer target type.
- When BLIS_ARCH_TYPE=generic, call to bli_cntx_get_l1v_ker_dt
in ref_kernels/1/bli_scalv_ref.c for ZSCAL was causing a
segmentation fault. This was because the cntx was NULL on
entry to this function. Correct by getting zscal_blis_impl
to pass the cntx it has initialized for non-Zen codepaths.
This changes has been copied to idamax_blis_impl for
consistency.
AMD-Internal: [CPUPL-2773]
Change-Id: Ib02e4c1a2a7bf30c208732241d4959f7a2696179
- Fix in README.md.
- Updating abs overload for scomplex and dcomplex to avoid overflow by using std::abs.
- Updating comparators to take into account NaNs and Infs when measuring error.
AMD-Internal: [CPUPL-2732]
Change-Id: I8c12bacd9d63b2e914d0a79f337f7525dc16b733
cmake generated files and executables are cleaned within
build directory by "make distclean" command.
Change-Id: I4fd5193e92958122ff10ecc634b42096f3b3716e
- Fixed segmentation fault that was seen on non zen and non avx2
machines.
- cntx object was not passed to the invoked kernel causing a seg
fault.
AMD-Internal: [CPUPL-3167]
Change-Id: I2640d3f905e78398935cf6ed667b04a6418baa5d
BLAS1 and BLAS2 routines may not immediately call bli_init_auto, as
the full cntx and other global data structures may not be required
for all code paths. This may cause a problem if the user sets
BLIS_ARCH_TYPE, as it needs to check the requested value against the
available options configured in cntx. Solution: add a separate
pthread_once call to run bli_gks_init().
AMD-Internal: [CPUPL-3031]
Change-Id: Icd73a8dd161b34b23cc336623d675248f28ed23f
Improvements to BLIS cpuid functionality:
- Tidy names of avx support test functions, especially rename
bli_cpuid_is_avx_supported() to bli_cpuid_is_avx2fma3_supported()
to more accurately describe what it tests.
- Fix bug in frame/base/bli_check.c related to changes in commit
6861fcae91
AMD-Internal: [CPUPL-3031]
Change-Id: Iacd8fb0ffbd45288e536fc6314660709055ea2d5
-The n fringe micro kernels uses only a few zmm registers for computing
the output (eg: 6x16 uses 6 zmm registers for output as opposed to 24
used in 6x64). This results in lot of wasted registers that if utilized
can help increase the MR dimension and thus improve the reuse of
registers loaded with B. Based on this concept, the existing n fringe
kernels are modified (6x16 -> 12x16, 6x32 -> 9x32). It is to be noted
that the maximum number of registers are not used, since it results in
cache inefficient code due to the increase in MR and thus more
broadcasts required from unpacked A matrix.
-Compiler flag updates for AOCC build to generate loops with 64 byte
alignment. This has been observed to improve performance slightly when
k dimension is small.
AMD-Internal: [CPUPL-3173]
Change-Id: I199ce75ef71d994ffe0067dac1ed804dce1742ca
1. New LPGEMM type - S8S8S32/S8 is added.
2. New interface, frame and kernel files are added.
3. Frame and kernel files added/modified for S8S8S32/S8 have
2 operations - Pack B and Mat Mul
4. Pack B kernel routines to pack B matrix for VNNI and compute the sum
of every column of B matrix to implement the S8S8S32 operation using
the VNNI instructions.
5. Mat Mul Kernel files to compute the GEMM output using the VNNI.
Here the A matrix elements are converted from int8 to uint8 (VNNI
works with A matrix type uint8 only).
6. Post GEMM computation, additional operations are performed on the
accumulated outputs to get the correct results.
7. With this change, two new LPGEMM APIs are introduced in LPGEMM -
s8s8s32os32 and s8s8s32os8.
8. All previously added post-ops are supported on S8S8S32/S8 also.
AMD-Internal: [CPUPL-3154]
Change-Id: Ib18f82bde557ea4a815a63adc7870c4234bfb9d3
Details:
- Added checks in top-level BLAS layer for alpha = zero. Scale C with
beta or set C with 0 appropriately if true and return. This ensures
that input matrices are not referenced, and thus that any Inf or NaN
values in them are not propagated to output matrix.
- Scalm internally handles the case where both alpha and beta are zero
by calling setm to populate the output matrix with zeroes.
AMD-Internal: [CPUPL-3134]
Change-Id: I14f14419049e7fcc55bf7fd30ddbd3d5a12c4427
- Kernel block size is 12x4
- Updated the zen4 config to enable these kernels in zen4 path.
- Tuned MC,KC,NC for better performance for m/n/k size > 500
- Updated CMakeLists.txt with ZGEMM kernels for windows build.
Kernel supports:
1. Preload and prebroadcast of A and B
2. Prefecth of C Matrix
3. K loop is sub divided in to multiple loops to maintain distance between c prefetchs.
4. Special case when alpha/beta imag component is zero
5. Row/Col/General stride of Matrix C
AMD-Internal: [CPUPL-2998]
Change-Id: I62e3c352d475b1add3f43270805fbcee00e2e440
AVX512 optimised kernel for Double datatype supports
row and column major matrix
Packing kernel is column major implementation
If matrix is row major, we need to transpose block before storing it.
If matrix is column major, we directly store
AMD-Internal: [CPUPL-2966]
Change-Id: I8e43f1e2b562c382f44278cd47b3d1e84a4d24c9
AVX512 packing kernel supports:
1. Dcomplex datatype
2. Row and column major matrix
AVX512 packing kernel doesnot support:
1. General stride matrix
2. Fringe cases(only multiplies of 4 or 12 is supported)
3. Conjugate is not supported
scal2m will be used for above unsupported functionality
AVX512 packing kernel is column preferred kernel
If matrix is row major, we need to transpose block before storing it.
If matrix is column major, we directly store it
AMD-Internal: [CPUPL-3088]
Change-Id: I3fcd94248a3a6527c807cccc1b3408db9fe2a737
- Complex AXPBY kernels gave incorrect output when both alpha and
beta had non-zero imaginary parts.
- Previously, the scalar code (used to calculate remainder result
or non-unit increment cases) was directly accessing and updating
the y-vector pointer thus, resulting in an incorrect output.
Updated it to operate on a local copy of the currect y element
and store the final result to the y-pointer.
- Also, added operation to store temporary calculation of alpha*x
in an intermediate vector and then later added to the y vector.
AMD-Internal: [CPUPL-3037]
Change-Id: Iddbd3000dcb1505b444b0ad41ab881b055842e1c
- Added in-register transpose support for c matrix to
support row stored C matrix for dgemm sup.
- Support is added for all edge case kernels.
- FMA are made independent of each other, for faster
computation while storing data back to C matrix.
AMD-Internal: [CPUPL-2966]
Change-Id: I1d13af99a17ee66adbf5f537a4664ade489a7cad
- Main kernel is of size 24x8 and the associated fringe kernels
added are
- 24x7m, 24x6m, 24x5m, 24x4m, 24x3m, 24x2m, 24x1m
- 24x8, 24x7, 24x6, 24x5, 24x4, 24x3, 24x2, 24x1
- 16x8, 16x7, 16x6, 16x5, 16x4, 16x3, 16x2, 16x1
- 8x8, 8x7, 8x6, 8x5, 8x4, 8x3, 8x2, 8x1
- For fringe kernels, 24x? kernel handles 16 < m_remainder < 24
16x? kernel handles 8 < m_remainder <= 16
8x? kernel handles 0 < m_remainder <= 8
- Added a function 'bli_zen4_override_gemm_blkszs' to override
blocksizes and kernels to be used for SUP for supported storage
schemes.
- Updated the zen4 config to enable these kernels in zen4 path.
- Thresholds are yet to be derived.
- Updated CMakeLists.txt with DGEMM SUP kernels for windows build.
Kernel-specific details:
- K-loop is unrolled by 8 times to facilitate prefetch of B.
- For every load of one column of A, the corresponding column in
next panel of A is prefetched with T1 hint.
- One column of C is prefetched with T0 hint per iteration of LOOP2.
- TAIL_NITER is derived to be 3.
- For every unroll of k-loop, one row of B is prefetched with T0 hint.
- C-prefetching for row-storage is yet to be added.
- B-prefetching for col-storage is yet to be added.
- Support for C transpose is yet to added.
AMD-Internal: [CPUPL-2755], [CPUPL-2409]
Change-Id: Ie240c893469032dc2271cbfe00cceccfe6c4ea48
Added a check in scalm framework for alpha=0.
Set the output matrix to zero when alpha=0.
This ensures that any Inf or NaN values in the matrix are not
propagated to the output matrix.
AMD-Internal: [CPUPL-3053]
Change-Id: I62b9b5405be220eb4df97aadda14701abcccb475
Details:
- To be BLAS compliant, if increment is zero then iterate through the first element n times.
- For n<=0, the correct result (0) is returned so we remove this extra check. This is checked on BLIS-typed interface level.
AMD-Internal: [SWLCSG-1900]
Change-Id: I098bb9560a790050018bc8d8c63b06bfbcc1aebd
- RBP is base pointer which points to base of current stack frame.
ASAN tool rely on rbp and rsp for stack related validations. So over-writting
or modifying RBP register results in application termination with the error code
of stack overflow.
- Removed all the code snippets which were using rbp register for prefetching matrices
and sometimes loading elements from memory in all of the gemm sup kernels for double
datatype.
- Removed reference to rbp from register clobber list as well to completely avoid the
usage of rbp register.
AMD-Internal: [CPUPL-2613, CPUPL-2587]
Change-Id: Idd402d3c644c4dd66e8d4988aede539ad8c77b28
- Enabled DTRSM small mt for sizes where performance is better
than small or native.
- Threshold Tuning for small path is updated.
- Function signature for bli_trsm_small_mt has been made similar
to bli_trsm_small so that one function pointer can be used for
all functions.
- Early return condition in DTRSM small for sizes > 1000 has been
removed so that the sizes for which small path to take can be
decided on bla layer instead of inside kernel.
AMD-Internal: [CPUPL-2735]
Change-Id: Ieea31343dc660517acc18c92713381a8b84d3a2f
Add test in top-level GEMM BLAS layer for alpha = zero. Scale C
appropriately if true and return. This ensures that A and B are not
referenced, and thus that any Inf or NaN values in A or B are not
propagated to C. This was tested in some lower level code paths,
but not consistently.
Solution throughout GEMM codebase assumes scalm handles scale value
(beta from GEMM) equal to 0 without propagating inf/NaNs in C matrix.
Also call AOCL_DTL exits and bli_finalize_auto() in a more consistent
way.
AMD-Internal: [CPUPL-3053]
Change-Id: I4009f311951eb1ce9416cf846e9fa93b7c9219cc
- Moved *_blis_impl function declaration outside the BLIS_ENABLE_BLAS
guard.
- Changed Makefile to continue to compile bla_ files to get
*_blis_impl interfaces.
- Modify CBLAS headers, bli_macro_defs.h and bli_util_api_wrap.{c,h}
to add BLIS_ENABLE_CBLAS guards.
- Comment out BLIS_ENABLE_BLAS guards in various headers and utility
functions.
- Define BLIS Fortran-style functions lsame_blis_impl and
xerbla_blis_impl. New macros PASTE_LSAME and PASTE_XERBLA are
used in bla_*_check headers and some other places to select
whether to call lsame and xerbla, or the _blis_impl versions.
- Defined various other missing _blis_impl functions.
- In bli_util_api_wrap.c, only define any functions if
BLIS_ENABLE_BLAS is defined, and only define the subroutine
versions of functions like dot, nrm2, etc if BLIS_ENABLE_CBLAS
is defined.
- BLAS layer is needed if CBLAS layer is enabled. Changed header
files build/bli_config.h.in and bli_blas.h, and configure
program to help ensure consistency in generated blis.h header
and configure output.
Undefining BLIS_ENABLE_BLAS_DEFS appears to be broken in UTA BLIS
too, thus BLIS_ENABLE_BLAS_DEFS is currently permanently defined.
AMD-Internal: [CPUPL-3015]
Change-Id: I7c0fe07db85781db46f2c690e174451860b37635
- Added DGEMM and DTRSM row preferred micro kernels.
- DTRSM left lower and left upper micro kernels are added.
- DGEMM kernel is optimized for both row stored C and col
stored C.
AMD-Internal: [CPUPL-2745]
Change-Id: Iecd2c1b0b0972e17e7b31e4b117e49c90def5180
- In cases when incy != 1, a buffer is created for y vector. The
contents of vector y is scaled by beta and stored in this buffer.
- After performing the compute using ZAXPYF kernel, the results in
y buffer memory is copied back to the orginal buffer using ZCOPYV.
- In cases when alpha is zero, we only scale the y vector by beta
without using the buffer and return.
- The kernels are picked based on the architecture ID. For any zen
based architecture, AVX2 kernels are invoked. For other, the
kernels are invoked based on the context.
- In ZSCAL2V, query for the context if NULL pointer is passed.
AMD-Internal: [CPUPL-2773]
Change-Id: If409ca5c438fc2eebe73480c011577088d52c65f
- The new AMAXV adheres to the BLAS definition of ISAMAX by not handle
NaN separately. In the previous kernel, NaN is considered the smallest
element of all the elements in the array.
- The new logic uses two helper functions - bli_vec_absmax_double and
bli_vec_search_double.
- bli_vec_absmax_double finds the absolute largest element and the index
range in which the first occurence of this element can be found.
- bli_vec_search_double returns the index of the first occurence of the
absolute value of an element.
- AMAXV uses these two helper functions to find the absolute largest
element and then searches using bli_vec_search_double in the reduced
range provided by bli_vec_absmax_double.
- Added condition check for n == 1 in BLAS layer. It is an optimization
mention in the BLAS standard API definition.
- Removed redundant n == 0 condition check from the kernel. This is a
BLAS exception and is already done in the BLAS layer.
- Removed AVX2 flag check from the BLAS layer. Kernels will be picked
based on the architecture ID in the new design.
AMD-Internal: [CPUPL-2773]
Change-Id: Ida2dae84a60742e632dc810ab1b7b80fc354e178
Key features:
- able to test both static and dynamic libraries
- able to test BLAS, CBLAS and BLIS-typed interface
- can use any CBLAS library for reference results
- can build and/or run tests depending on the BLAS level or a specific API
AMD-Internal: [CPUPL-2732]
Change-Id: Ibe0d7938e06081526bbc54d3182ac7d17affdaf6
-Certain sections of the f32 avx512 micro-kernel were observed to
slow down when more post-ops are added. Analysis of the binary
pointed to false dependencies in instructions being introduced in
the presence of the extra post-ops. Addition of vzeroupper at the
beginning of ir loop in f32 micro-kernel fixes this issue.
-F32 gemm (lpgemm) thread factorization tuning for zen4/zen3 added.
-Alpha scaling (multiply instruction) by default was resulting in
performance regression when k dimension is small and alpha=1 in s32
micro-kernels. Alpha scaling is now only done when alpha != 1.
-s16 micro-kernel performance was observed to be regressing when
compiled with gcc for zen3 and older architecture supporting avx2.
This issue is not observed when compiling using gcc with avx512
support enabled. The root cause was identified to be the -fgcse
optimization flag in O2 when applied with avx2 support. This flag is
now disabled for zen3 and older zen configs.
AMD-Internal: [CPUPL-3067]
Change-Id: I5aef9013432c037eb2edf28fdc89470a2eddad1c
1. Implemented efficient AVX-512, AVX-2 and SSE-2 version of the
error function - ERF
2. Added error function based GeLU activation post-ops for the
S32, S16 and BF16 (LPGEMM) and SGEMM APIs.
3. Changes for this includes frame and micro-kernel level changes in
addition to adding the marco based function definations of the
ERF function in the math-utils and gelu headerfiles.
AMD-Internal: [CPUPL-3036]
Change-Id: Ie50f6dcabf8896b7a6d30bbc16aa44392cc512be
Details:
- Changed sumsqv implementation as follows:
- If there is a NaN (either real or imaginary), then return a sum of
NaN and unit scale.
- Else, if there is an Inf (either real or imaginary), then return a
sum of +Inf and unit scale.
- Otherwise behave as normal.
(cherry picked from commit b861c71b50)
AMD-Internal: [SWLCSG-1900]
Change-Id: Ic7ba9cad1fbaf11823b9ba96e72a4ddd973db5b6
- Extended the existing support for handling beta scaling
in the fringe cases of 3x4 RD kernels in ZGEMM SUP. The
added support ensures that NaN values initialized in C do
not propogate to the result when beta is 0.
- The support has been added to fringe cases common to, as well
as specific to the m and n variants of the RD kernels.
AMD-Internal: [CPUPL-3053] [SWLCSG-1900]
Change-Id: I8e617ac505144c3ea3a70556413d264f11dfc9a9
- Since the definition of negative increments is different between BLAS and BLIS,
there was bug on how the memory was accessed when we were copying the elements
of a vector with negative increments. Updated the code under the assumption that
when negative increments are set, the vector is being accessed starting from the end.
For the BLAS interface, there is an intermediate conversion before calling into the blis layer.
Change-Id: I08343472b418733fad6f7add9e90aa96cdf68285
AMD-Internal: [SWLCSG-1900]
-Currently the storage preference of native kernel is used to determine
appropriate "m" and "n" which are used in native/SUP threshold logic.
This assumption works only when "sup" & native kernel preferences are
same. However, this need not have to be the case. This fix calculates
the correct "m" and "n" irrespective of the native/sup kernel
preferences thereby improving accuracy of this decision logic.
AMD-Internal: [CPUPL-3039]
Change-Id: I88c5a6838aeed867effdbbdfc41fbf2e88d4e52a
- Increased unroll by reusing X registers that was previously used
for performing shuffle.
- Added loops with smaller increment steps for better problem
decomposition.
- Added X vector and Y vector prefetch to the kernel.
- Removed redundant code that handles fringe in incx = 1 and
incy = 1. This remainder will be performed by the loop that handles
non-unit stride cases.
- Vectorized loops that handle non-unit stride cases using SSE
instructions.
AMD-Internal: [CPUPL-2773]
Change-Id: Ifb5dc128e17b4e21315789bfaa147e3a7ec976f0
- Mx4 edge kernels were overwriting rbp
registers for prefetches.
- Since rbp along with rsp defines stack frame,
it resulted in stack overflow issue.
- Replaced rbp with rdx register for prefetches.
AMD-Internal: [CPUPL-2987]
Change-Id: I4e52cf691b70be5ab63f562d7630d640b29e1cfd
- Added SCAL2V kernel that uses AVX2 and SSE instructions for
vectorization.
- The routine returns early when the vector dimension is zero
or incx <= 0 or incy <= 0.
- The kernel takes one among the two available paths based on
conjugation requirement of X vector.
- VZEROUPPER is added before transitioning from AVX2 to SSE.
- Added function pointer to ZEN, ZEN 2, ZEN 3 and ZEN 4 contexts.
- Added the new SCAL2V file from the CMAKE list.
AMD-Internal: [CPUPL-2773]
Change-Id: I2debbfab31d41347786c3a1bae5723d092c202e9
- Bias add, relu, parametric relu and gelu post-ops support added in all
f32 gemm micro-kernels. These post-ops are implemented for both AVX512
and AVX2 ISA based on the micro-kernel flavor. The support is added for
both row and column major cases.
- Lpgemm bench updates to support f32 post-ops.
AMD-Internal: [CPUPL-3032]
Change-Id: Ie6840b9d4e52d2086c1b5ff2e1de80dc0cad5476
- Added k-loop unrolling by a factor of 4 to the following SGEMM
SUP RV kernels:
- 5x48, 5x32, 5x16
- 4x64, 4x48, 3x32, 4x16
- 3x48, 3x32, 3x16
- 2x64, 2x48, 2x32, 2x16
- 1x64, 1x48, 1x32, 1x16
- 6x64n, 5x64n, 3x64n, 2x64n, 1x64n
- Removed unused variables which were resulting in warnings during
compilation.
- Added a newline at the end of header files to resolve warnings
shown during compilation.
AMD-Internal: [CPUPL-3002]
Change-Id: Iab6cf329f6d7fbd7544b5c8837e493069e8c9921
-Currently lpgemm can only be built using either zen3 or zen4 config.
The lpgemm kernel code is re-structured to support amdzen, and thus
multi machine deployment.
-The micro-kernel calls (gemm and pack) are currently hardcoded in the
lpgemm framework. This is removed and a new lpgemm_cntx based dispatch
mechanism is designed to support runtime configurability for
micro-kernels.
AMD-Internal: [CPUPL-2965]
Change-Id: I4bbcb4e5db767def1663caf5481f0b4c988149ef
- Removed repetitive function declaration of GEMM small kernels
from the C files
- Function declaration of these kernels exist in the header files
where the kernels are supposed to be declared.
AMD-Internal: [CPUPL-3003]
Change-Id: Ic10e66691c0742ce519bcc3fe4a12ec5c5052b63
- Currently the pointer received as function argument is
used for packing which causes only a partial copy of
input buffer to output buffer due to strange optimizations
by compiler.
- To fix this, instead of using a normal pointer for output
buffer, we define a "restrict" local pointer variable.
- "restrict" keyword tells the compiler that the pointer is
the only way to access the object pointed by the pointer.
- By defining "restrict" local pointer pointing to output
buffer, the mysterious problem of incomplete copy has
been solved.
Change-Id: Ie2355beb1d43ff4b60b940dd88c4e2bf6f361646
- In zen4 arch TRSM and GEMM have different blocksizes.
TRSM call will update blockize in global cntx object
which is incorrect for GEMM, when GEMM and TRSM are
called in parallel.
- Hence using a local copy of cntx which holds blocksizes
would help.
AMD-Internal: [CPUPL-3019]
Change-Id: I5f0f5675b3917d2a11d582ac626ca5d8f4752c53
Description:
1. Developed row variant intrinsic Kernels for float32/sgemm
which are called from lpgemm api aocl_gemm_f32f32f32of32()
2. 6x64m, 6x48m, 6x32m kernels and respective fringe kernels are
developed using avx512.
3. 6x16m main kernel and respective n fringe and mn fringe are
are developed based on avx2 and avx
4. Modularizing, K loop unroll, perf tuning, post-ops and dynamic
dispatch are planned next
5. When leading dims are greater than dims bench_lpgemm need
to be updated to test it and this is planned next.
Change-Id: I54c78fef639ea109d6ef2c2b05c07ce396c81370
- Added kernels for all rv and rd variants.
- Main kernel is of size 6x64, and the associated fringe kernels
added are
- 4x64, 2x64, 1x64
- 6x32, 4x32, 2x32, 1x32
- 6x16, 4x16, 2x16, 1x16
- Updated the zen4 config to enable these kernels in zen4 path.
- Added C-prefetching to 6x? row-stored main kernels.
- C-prefetching for column storage yet to be added.
- K-loop unrolling for fringe kernels yet to be added.
AMD-Internal: [CPUPL-3002]
Change-Id: Ide18412cc6178b43a12a3bc7a608ce9d298fb2e4
- Added ZCOPYV kernel that uses AVX2 and SSE instructions for
vectorization.
- The routine returns early when the vector dimension is zero.
- The kernel takes one among the two available paths based on
conjugation requirement of X vector.
- VZEROUPPER is added before transitioning from AVX2 to SEE.
- Added function pointer to ZEN, ZEN 2, ZEN 3 and ZEN 4 contexts.
AMD-Internal: [CPUPL-2773]
Change-Id: Ibd8a2de42060716395ef698d753c8462654cc0f0
