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merged 8 commits into from
Mar 28, 2023
Merged

[SYCL][Matrix] Add initial get_coord API #7851

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042c62b
[FEATURE][SYCL-MATRIX] Adding get_coord() API.
arnamoy10 Mar 17, 2023
b50cdb3
Keeping just only test file, as the rest are part of llvm-test-suite
arnamoy10 Mar 22, 2023
f86af67
Address reviewer comment
arnamoy10 Mar 23, 2023
a675da1
Moving get_coord() inside wi_element class
arnamoy10 Mar 23, 2023
73b2fb2
Removing commented code
arnamoy10 Mar 23, 2023
c01083e
clang-format
arnamoy10 Mar 23, 2023
be223a1
clang-format
arnamoy10 Mar 23, 2023
d8a2b56
Minor comment removal.
arnamoy10 Mar 23, 2023
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7 changes: 7 additions & 0 deletions sycl/include/CL/__spirv/spirv_ops.hpp
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Original file line number Diff line number Diff line change
Expand Up @@ -105,6 +105,13 @@ template <typename T, std::size_t R, std::size_t C, __spv::MatrixUse U,
extern __DPCPP_SYCL_EXTERNAL __spv::__spirv_JointMatrixINTEL<T, R, C, L, S, U> *
__spirv_CompositeConstruct(const T v);

template <typename T, std::size_t R, std::size_t C, __spv::MatrixUse U,
__spv::MatrixLayout L = __spv::MatrixLayout::RowMajor,
__spv::Scope::Flag S = __spv::Scope::Flag::Subgroup>
extern __DPCPP_SYCL_EXTERNAL __ocl_vec_t<uint32_t, 2>
__spirv_JointMatrixGetElementCoordINTEL(
__spv::__spirv_JointMatrixINTEL<T, R, C, L, S, U> *, size_t i);

template <typename T, std::size_t R, std::size_t C, __spv::MatrixUse U,
__spv::MatrixLayout L = __spv::MatrixLayout::RowMajor,
__spv::Scope::Flag S = __spv::Scope::Flag::Subgroup>
Expand Down
43 changes: 43 additions & 0 deletions sycl/include/sycl/ext/oneapi/matrix/matrix-intel.hpp
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Original file line number Diff line number Diff line change
Expand Up @@ -83,6 +83,13 @@ class wi_element {
NumCols, Layout> &M;
std::size_t idx;

template <typename T1, size_t NRows, size_t NCols,
sycl::ext::oneapi::experimental::matrix::use Use1,
sycl::ext::oneapi::experimental::matrix::layout Layout1,
typename Grp>
friend std::tuple<uint32_t, uint32_t>
get_coord(wi_element<T1, NRows, NCols, Use1, Layout1, Grp> &);

public:
wi_element(sycl::ext::oneapi::experimental::matrix::joint_matrix<
Group, T, Use, NumRows, NumCols, Layout> &Mat,
Expand Down Expand Up @@ -165,6 +172,13 @@ class wi_element<sycl::ext::oneapi::bfloat16, NumRows, NumCols, Use, Layout,
Group, sycl::ext::oneapi::bfloat16, Use, NumRows, NumCols, Layout> &M;
std::size_t idx;

template <typename T1, size_t NRows, size_t NCols,
sycl::ext::oneapi::experimental::matrix::use Use1,
sycl::ext::oneapi::experimental::matrix::layout Layout1,
typename Grp>
friend std::tuple<uint32_t, uint32_t>
get_coord(wi_element<T1, NRows, NCols, Use1, Layout1, Grp> &);

public:
wi_element(sycl::ext::oneapi::experimental::matrix::joint_matrix<
Group, sycl::ext::oneapi::bfloat16, Use, NumRows, NumCols,
Expand Down Expand Up @@ -308,6 +322,35 @@ class wi_element<sycl::ext::oneapi::bfloat16, NumRows, NumCols, Use, Layout,

// End wi_element definition

template <typename T, size_t NumRows, size_t NumCols,
sycl::ext::oneapi::experimental::matrix::use Use,
sycl::ext::oneapi::experimental::matrix::layout Layout,
typename Group>
inline __SYCL_ALWAYS_INLINE std::tuple<uint32_t, uint32_t>
get_coord(wi_element<T, NumRows, NumCols, Use, Layout, Group> &we) {
#if defined(__SYCL_DEVICE_ONLY__)
__ocl_vec_t<uint32_t, 2> coord =
__spirv_JointMatrixGetElementCoordINTEL(we.M.spvm, we.idx);
const uint32_t row = coord[0];
const uint32_t col = coord[1];
return std::make_tuple(row, col);
#else
std::ignore = we;
throw runtime_error(
"get_coord is only supported on Intel XMX and AMX devices.",
PI_ERROR_INVALID_DEVICE);
#endif // __SYCL_DEVICE_ONLY__
}

// To make host compilation possible, here the argument is not a wi_element
// type, but just base data types e.g. float, int8 etc.
template <typename T>
inline __SYCL_ALWAYS_INLINE std::tuple<uint32_t, uint32_t> get_coord(T &we) {
std::ignore = we;
throw runtime_error("joint matrix is not supported on host device.",
PI_ERROR_INVALID_DEVICE);
}

// Begin wi_data definition

template <typename Group, typename T,
Expand Down
238 changes: 238 additions & 0 deletions sycl/test/matrix/matrix-bfloat16-test-coord-basicB.cpp
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Original file line number Diff line number Diff line change
@@ -0,0 +1,238 @@
// RUN: %clangxx -fsycl -O2 -DSYCL_EXT_ONEAPI_MATRIX_VERSION=4 %s -o %t.out

// Kernel B sum by col
#include <iostream>
#include <sycl/sycl.hpp>

using namespace sycl;
using namespace sycl::ext::oneapi::experimental::matrix;

#define SG_SZ 16

#define TN SG_SZ
#define TK 32

template <typename T, size_t NUM_ROWS, size_t NUM_COLS> struct big_matrix {
public:
T *mat;

public:
T *get_data() { return mat; }
void set_data(T *data) { mat = data; }
big_matrix(T *data) : mat(data) {}
};

template <typename T, size_t M, size_t N>
void sum_cols_ref(host_accessor<T, 2, access::mode::read_write> B,
host_accessor<int, 1, access::mode::read_write> sum_cols) {
int sum_cols_ref[N] = {0};
for (size_t j = 0; j < N; j++) {
for (size_t i = 0; i < M; i++) {
sum_cols_ref[j] += B[i][j];
}
auto diff = sum_cols[j] - sum_cols_ref[j];
assert(std::fabs(static_cast<int>(diff)) <=
std::numeric_limits<int>::epsilon());
}
}

// clang-format off
/*
Here is a demonstration of how matrix B will be divided across
work items for this test case.
< --------------- 128 ---------------------------------->
x x x x x x x x x x x x x x x x .......... x x x x x x ^
x x x x x x x x x x x x x x x x .......... x x x x x x 16
x x x x x x x x x x x x x x x x .......... x x x x x x |
..... |
x x x x x x x x x x x x x x x x .......... x x x x x x |
x x x x x x x x x x x x x x x x .......... x x x x x x v
--------------- 64 ---------------->
x x x x x x .......... x x x x x x ^
x x x x x x .......... x x x x x x 8
x x x x x x .......... x x x x x x | <-- part of (VNNI-ed)
..... | original matrix each SG
x x x x x x .......... x x x x x x | holds
x x x x x x .......... x x x x x x v
< WI0 > < WI15 >
<-------- 16 ------------->
x x x .......... x x x ^
x x x .......... x x x |
x x x .......... x x x | <-- part of (non-VNNI-ed) original matrix
..... | each SG holds
x x x .......... x x x |
x x x .......... x x x |
x x x .......... x x x 32
x x x .......... x x x |
x x x .......... x x x |
x x x .......... x x x |
x x x .......... x x x |
x x x .......... x x x |
x x x .......... x x x v
If we dividie the above matrix across 16 (SG_SZ) work items,
each WI will hold 32 elements. And these 32 elements will be
8x4 chunks as shown in the VNNI-ed matrix figure.
*/

// The total distribution among the WIs in ALL the sub-groups is as follows:
// This is useful to figure out the the global index is to be calculated

/*
W0 --> 0 0 0 0 1 1 1 1 ... 7 7 7 7 --> total 32 elements
wi [0,0] --> i=0, [0, 0] wi [0,1] --> i=0, [0, 4] wi [0,15] --> i=0, [0, 60] | wi [0,16] --> i=0, [0, 64]
i=1, [0, 1] i=1, [0, 5] i=1, [0, 61] | i=1, [0, 65]
i=2, [0, 2] i=2, [0, 6] i=2, [0, 62] | i=2, [0, 66]
i=3, [0, 3] i=3, [0, 7] i=3, [0, 63] | i=3, [0, 67]
i=4, [1, 0] i=4, [1, 4] i=4, [1, 60] | ....
i=5, [1, 1] i=5, [1, 5] i=5, [1, 61] |
i=6, [1, 2] i=6, [1, 6] i=6, [1, 62] |
i=7, [1, 3] i=7, [1, 7] i=7, [1, 63] |
... ... .... |
i=28,[7, 0] i=28,[7, 4] i=28,[7, 60] | i=28, [7, 124]
i=29,[7, 1] i=29,[7, 5] i=29,[7, 61] | i=29, [7, 125]
i=30,[7, 2] i=30,[7, 6] i=30,[7, 62] | i=30, [7, 126]
i=31,[7, 3] i=31,[7, 7] i=31,[7, 63] | i=31, [7, 127]
---------------------------------------------------------------------------------------- ---------------------------
wi [1,0] --> i=0, [8, 0]
i=1, [8, 1]
i=2, [8, 2]
i=3, [8, 2]
...
i=28, [15, 0]
i=29, [15, 1]
i=30, [15, 2]
i=31, [15, 3]
*/

// The following is the distribution among WIs in a SINGLE SG.
/*
W0 --> 0 0 0 0 1 1 1 1 ... 7 7 7 7 --> total 32 elements
wi [0,0] -> i=0, [0, 0] wi [0,1] --> i=0, [0, 4] wi [0,15] --> i=0, [0, 60] |
i=1, [0, 1] i=1, [0, 5] i=1, [0, 61] |
i=2, [0, 2] i=2, [0, 6] i=2, [0, 62] |
i=3, [0, 3] i=3, [0, 7] i=3, [0, 63] |
i=4, [1, 0] i=4, [1, 4] i=4, [1, 60] |
i=5, [1, 1] i=5, [1, 5] i=5, [1, 61] |
i=6, [1, 2] i=6, [1, 6] i=6, [1, 62] |
i=7, [1, 3] i=7, [1, 7] i=7, [1, 63] |
... ... .... |
i=28,[7, 0] i=28,[7, 4] i=28,[7, 60] |
i=29,[7, 1] i=29,[7, 5] i=29,[7, 61] |
i=30,[7, 2] i=30,[7, 6] i=30,[7, 62] |
i=31,[7, 3] i=31,[7, 7] i=31,[7, 63] |
*/
// clang-format on

template <typename T, size_t M, size_t N>
void matrix_sum_cols(queue q, big_matrix<T, M, N> &B, nd_range<2> &r) {
buffer<int8_t, 2> bufB(B.get_data(), range<2>(M, N));
// size of vector is known because SG size of set by the user in this case
int sum_cols[N] = {0};
buffer<int> sum_cols_v(sum_cols, N); // there are total of tK/4 * 2, 16 rows
q.submit([&](handler &cgh) {
auto accB = bufB.get_access<access::mode::read_write>(cgh);

auto v = sum_cols_v.get_access<access::mode::atomic>(cgh);
auto os = sycl::stream(100000, 6144, cgh);

cgh.parallel_for<class add_matrix>(
r, [=](nd_item<2> spmd_item) [[intel::reqd_sub_group_size(SG_SZ)]] {
const auto global_idx = spmd_item.get_global_id(0);
const auto global_idy = spmd_item.get_global_id(1);
const auto sg_startx = global_idx - spmd_item.get_local_id(0);
const auto sg_starty = global_idy - spmd_item.get_local_id(1);

ext::oneapi::sub_group sg = spmd_item.get_sub_group();

// TK = 32, TN = 16
joint_matrix<sub_group, int8_t, use::b, TK, TN,
ext::intel::experimental::matrix::layout::packed>
sub_b;

joint_matrix_load(sg, sub_b,
accB.get_pointer() + (global_idx * (TK / 4) * N) +
sg_starty / SG_SZ * TN * 4,
N);

int32_t sum_local_cols[N] = {0}; // 4 local cols, N total
// sub_b has 32x16 elements, 32 elements per WI, 4 per WI per row
auto wiData =
sycl::ext::intel::experimental::matrix::get_wi_data(sg, sub_b);

size_t
global_index; // Index into the result array that holds the sums.

// Keep track of cols handled in this WI
int32_t handled_cols[N] = {-1};

// each WI calculates local sum of cols
for (int i = 0; i < wiData.length(); ++i) {
// get the index of the element in the submatrix
auto dataItem = wiData[i];
auto [row, col] =
sycl::ext::intel::experimental::matrix::get_coord(dataItem);

// Calculation of global index
int sg_idx = (int)global_idy / SG_SZ;
global_index = col + sg_idx * 4 /*VNNI_FACTOR*/ * SG_SZ;
sum_local_cols[global_index] += wiData[i];
handled_cols[global_index] = 1;
}

for (int j = 0; j < N; j++) {
if (handled_cols[j] == 1) {
global_index = j;
sum_local_cols[global_index] = reduce_over_group(
sg, sum_local_cols[global_index], sycl::plus<>());
// TODO: Do we need a reduce_over_grp? Adding it does not
// make any difference in result
atomic_fetch_add(v[global_index], sum_local_cols[global_index]);
}
}
}); // parallel for
}).wait();
sum_cols_ref<T, M, N>(bufB.get_host_access(), sum_cols_v.get_host_access());
}

// TK = 32, TN = 16
static constexpr size_t MATRIX_K = TK / 4 * 2; // 16
static constexpr size_t MATRIX_N = TN * 4 * 2; // 128
int8_t B[MATRIX_K][MATRIX_N];

/* < --------------- 128 ---------------------------------->
x x x x x x x x x x x x x x x x .......... x x x x x x ^
x x x x x x x x x x x x x x x x .......... x x x x x x 16
x x x x x x x x x x x x x x x x .......... x x x x x x |
..... |
x x x x x x x x x x x x x x x x .......... x x x x x x |
x x x x x x x x x x x x x x x x .......... x x x x x x v
*/
int main() {
big_matrix<int8_t, MATRIX_K, MATRIX_N> MB((int8_t *)&B);

size_t NDRangeK = MATRIX_K / (TK / 4);
size_t NDRangeN = (MATRIX_N / 4) / TN;
queue q;
nd_range<2> r({NDRangeK, NDRangeN * SG_SZ}, {1, 1 * SG_SZ});

for (int i = 0; i < MATRIX_K; i++) {
for (int j = 0; j < MATRIX_N; j++) {
B[i][j] = i;
}
}

matrix_sum_cols<int8_t, MATRIX_K, MATRIX_N>(q, MB, r);

std::cout << "Passed\n";

return 0;
}