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hfphfp
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ocl: revised handling flags and build options (#917)
- Improved/centralized applying debug flag. - Removed internal options/flags. - Reworked building kernels. - acc_benc: revised handling NREPEAT_H2D. - acc_benc: print correct size/timing.
1 parent 5e6dfee commit 12fd933

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-111
lines changed

4 files changed

+117
-111
lines changed

‎src/acc/acc_bench.c‎

Lines changed: 12 additions & 6 deletions
Original file line numberDiff line numberDiff line change
@@ -395,16 +395,22 @@ int main(int argc, char* argv[]) {
395395
CHECK(c_dbcsr_acc_memcpy_h2d(amat_hst, amat_dev, sizeof(ELEM_TYPE) * mk * na, stream), &result, check);
396396
CHECK(c_dbcsr_acc_memcpy_h2d(bmat_hst, bmat_dev, sizeof(ELEM_TYPE) * kn * nb, stream), &result, check);
397397
CHECK(c_dbcsr_acc_memcpy_h2d(stack_hst, stack_dev, sizeof(int) * 3 * stack_size, stream), &result, check);
398-
for (r = 1; r < nrepeat_h2d; ++r) {
399-
CHECK(c_dbcsr_acc_memcpy_h2d(amat_hst, amat_dev, sizeof(ELEM_TYPE) * mk * na, stream), &result, check);
400-
CHECK(c_dbcsr_acc_memcpy_h2d(bmat_hst, bmat_dev, sizeof(ELEM_TYPE) * kn * nb, stream), &result, check);
401-
CHECK(c_dbcsr_acc_memcpy_h2d(stack_hst, stack_dev, sizeof(int) * 3 * stack_size, stream), &result, check);
398+
if (1 < nrepeat_h2d) {
399+
#if defined(USE_LIBXSMM)
400+
CHECK(c_dbcsr_acc_stream_sync(stream), &result, check);
401+
start = libxsmm_timer_tick();
402+
#endif
403+
for (r = 0; r < nrepeat_h2d; ++r) {
404+
CHECK(c_dbcsr_acc_memcpy_h2d(amat_hst, amat_dev, sizeof(ELEM_TYPE) * mk * na, stream), &result, check);
405+
CHECK(c_dbcsr_acc_memcpy_h2d(bmat_hst, bmat_dev, sizeof(ELEM_TYPE) * kn * nb, stream), &result, check);
406+
CHECK(c_dbcsr_acc_memcpy_h2d(stack_hst, stack_dev, sizeof(int) * 3 * stack_size, stream), &result, check);
407+
}
402408
}
403409
#if defined(USE_LIBXSMM)
404410
CHECK(c_dbcsr_acc_stream_sync(stream), &result, check);
405411
if (NULL != amat_hst && NULL != bmat_hst && NULL != stack_hst && EXIT_SUCCESS == result) {
406-
const size_t size = (sizeof(ELEM_TYPE) * (mk * na + kn * nb) + sizeof(int) * 3 * stack_size) * nrepeat_h2d;
407-
duration = libxsmm_timer_duration(start, libxsmm_timer_tick());
412+
const size_t size = (sizeof(ELEM_TYPE) * (mk * na + kn * nb) + sizeof(int) * 3 * stack_size);
413+
duration = libxsmm_timer_duration(start, libxsmm_timer_tick()) / nrepeat_h2d;
408414
perf_h2d = size / (duration * (1ULL << 30));
409415
PRINTF("copy-in (%i MB): %.2g ms %.1f GB/s\n", (int)((size + (1 << 19)) >> 20), 1000.0 * duration, perf_h2d);
410416
}

‎src/acc/opencl/acc_opencl.c‎

Lines changed: 94 additions & 92 deletions
Original file line numberDiff line numberDiff line change
@@ -1348,25 +1348,56 @@ int c_dbcsr_acc_opencl_flags_atomics(const c_dbcsr_acc_opencl_device_t* devinfo,
13481348
}
13491349

13501350

1351-
int c_dbcsr_acc_opencl_flags(
1352-
const char build_params[], const char build_options[], const char try_build_options[], char buffer[], size_t buffer_size) {
1351+
int c_dbcsr_acc_opencl_defines(const char defines[], char buffer[], size_t buffer_size, int cleanup) {
13531352
const c_dbcsr_acc_opencl_device_t* const devinfo = &c_dbcsr_acc_opencl_config.device;
1354-
int result = EXIT_SUCCESS;
1355-
assert(NULL != devinfo->context);
1356-
if (NULL != buffer) {
1353+
int result = 0;
1354+
if (NULL != buffer && NULL != devinfo->context) {
13571355
const int std_clevel = 100 * devinfo->std_clevel[0] + 10 * devinfo->std_clevel[1];
13581356
const int std_level = 100 * devinfo->std_level[0] + 10 * devinfo->std_level[1];
1359-
const int nchar = LIBXSMM_SNPRINTF(buffer, buffer_size, "%s -DACC_OPENCL_VERSION=%u -DACC_OPENCL_C_VERSION=%u %s %s %s %s",
1360-
devinfo->std_flag, std_level, std_clevel, 0 != c_dbcsr_acc_opencl_config.debug ? "-DNDEBUG" : "",
1361-
NULL != build_options ? build_options : "", NULL != build_params ? build_params : "",
1362-
NULL != try_build_options ? try_build_options : "");
1363-
if (0 < nchar && (int)buffer_size > nchar) {
1364-
char* replace = strpbrk(buffer, "\""); /* more portable (system/cpp needs quotes to protect braces) */
1365-
for (; NULL != replace; replace = strpbrk(replace + 1, "\"")) *replace = ' ';
1357+
result = LIBXSMM_SNPRINTF(buffer, buffer_size, " -DACC_OPENCL_VERSION=%u -DACC_OPENCL_C_VERSION=%u%s", std_level, std_clevel,
1358+
0 == c_dbcsr_acc_opencl_config.debug ? " -DNDEBUG" : "");
1359+
if (0 < result && (int)buffer_size > result) {
1360+
const int n = LIBXSMM_SNPRINTF(
1361+
buffer + result, buffer_size - result, ' ' != buffer[result - 1] ? " %s" : "%s", NULL != defines ? defines : "");
1362+
if (0 <= n) {
1363+
if ((int)buffer_size > (result += n) && 0 != cleanup) {
1364+
char* replace = strpbrk(buffer + result - n, "\""); /* more portable (system/cpp needs quotes to protect braces) */
1365+
for (; NULL != replace; replace = strpbrk(replace + 1, "\"")) *replace = ' ';
1366+
}
1367+
}
1368+
else result = -1;
13661369
}
1367-
else {
1368-
result = EXIT_FAILURE;
1369-
*buffer = '\0';
1370+
}
1371+
else result = -1;
1372+
return result;
1373+
}
1374+
1375+
1376+
int c_dbcsr_acc_opencl_kernel_flags(const char build_params[], const char build_options[], const char try_options[],
1377+
cl_program program, char buffer[], size_t buffer_size) {
1378+
const c_dbcsr_acc_opencl_device_t* const devinfo = &c_dbcsr_acc_opencl_config.device;
1379+
int result = EXIT_SUCCESS, nchar = 0;
1380+
assert(NULL != program && (NULL != buffer || 0 == buffer_size));
1381+
nchar = c_dbcsr_acc_opencl_defines(build_params, buffer, buffer_size, 1 /*cleanup*/);
1382+
if (0 <= nchar && (int)buffer_size > nchar) {
1383+
const int debug = (0 != c_dbcsr_acc_opencl_config.debug && 0 != devinfo->intel && CL_DEVICE_TYPE_CPU != devinfo->type);
1384+
int n = LIBXSMM_SNPRINTF(buffer + nchar, buffer_size - nchar, " %s%s %s", 0 == debug ? "" : "-gline-tables-only ",
1385+
devinfo->std_flag, NULL != build_options ? build_options : "");
1386+
if (0 <= n) {
1387+
nchar += n;
1388+
if (NULL != try_options && '\0' != *try_options) { /* length is not reported in result */
1389+
n = LIBXSMM_SNPRINTF(buffer + nchar, buffer_size - nchar, " %s", try_options);
1390+
if (0 > n || (int)buffer_size <= (nchar + n)) buffer[nchar] = '\0';
1391+
}
1392+
}
1393+
else nchar = n;
1394+
}
1395+
if (0 <= nchar && (int)buffer_size > nchar) { /* check if internal flags apply */
1396+
const cl_device_id device_id = c_dbcsr_acc_opencl_config.devices[c_dbcsr_acc_opencl_config.device_id];
1397+
result = clBuildProgram(program, 1 /*num_devices*/, &device_id, buffer, NULL /*callback*/, NULL /*user_data*/);
1398+
if (EXIT_SUCCESS != result) { /* failed to apply internal flags */
1399+
ACC_OPENCL_EXPECT(EXIT_SUCCESS == clReleaseProgram(program)); /* avoid unclean state */
1400+
buffer[nchar] = '\0'; /* remove internal flags */
13701401
}
13711402
}
13721403
else result = EXIT_FAILURE;
@@ -1375,13 +1406,13 @@ int c_dbcsr_acc_opencl_flags(
13751406

13761407

13771408
int c_dbcsr_acc_opencl_kernel(int source_is_file, const char source[], const char kernel_name[], const char build_params[],
1378-
const char build_options[], const char try_build_options[], int* try_ok, const char* const extnames[], size_t num_exts,
1409+
const char build_options[], const char try_options[], int* try_ok, const char* const extnames[], size_t num_exts,
13791410
cl_kernel* kernel) {
13801411
char buffer[ACC_OPENCL_BUFFERSIZE] = "", buffer_name[ACC_OPENCL_MAXSTRLEN * 2];
1381-
int ok = EXIT_SUCCESS, source_is_cl = 1, nchar;
1382-
int result = ((NULL != source && NULL != kernel_name && '\0' != *kernel_name) ? EXIT_SUCCESS : EXIT_FAILURE);
13831412
const cl_device_id device_id = c_dbcsr_acc_opencl_config.devices[c_dbcsr_acc_opencl_config.device_id];
13841413
const c_dbcsr_acc_opencl_device_t* const devinfo = &c_dbcsr_acc_opencl_config.device;
1414+
int result = ((NULL != source && NULL != kernel_name && '\0' != *kernel_name) ? EXIT_SUCCESS : EXIT_FAILURE);
1415+
int ok = EXIT_SUCCESS, source_is_cl = 1, nchar = 0;
13851416
size_t size_src = 0, size = 0;
13861417
cl_program program = NULL;
13871418
FILE* file_src = NULL;
@@ -1434,9 +1465,6 @@ int c_dbcsr_acc_opencl_kernel(int source_is_file, const char source[], const cha
14341465
if (NULL != ext_source_buffer) {
14351466
for (n = 0; 0 < num_exts; --num_exts) {
14361467
if (NULL != extnames[num_exts - 1]) {
1437-
# if !defined(NDEBUG)
1438-
const cl_device_id device_id = c_dbcsr_acc_opencl_config.devices[c_dbcsr_acc_opencl_config.device_id];
1439-
# endif
14401468
const char* const end = buffer_name + strlen(extnames[num_exts - 1]); /* before strtok */
14411469
char* ext = strtok(
14421470
strncpy(buffer_name, extnames[num_exts - 1], ACC_OPENCL_MAXSTRLEN * 2 - 1), ACC_OPENCL_DELIMS " \t");
@@ -1516,8 +1544,6 @@ int c_dbcsr_acc_opencl_kernel(int source_is_file, const char source[], const cha
15161544
}
15171545
# if defined(ACC_OPENCL_CPPBIN)
15181546
if (NULL != file_cpp && 0 <= file_dmp) { /* preprocess source-code */
1519-
const int std_clevel = 100 * devinfo->std_clevel[0] + 10 * devinfo->std_clevel[1];
1520-
const int std_level = 100 * devinfo->std_level[0] + 10 * devinfo->std_level[1];
15211547
const char* sed_pattern = "";
15221548
# if defined(ACC_OPENCL_SEDBIN)
15231549
FILE* const file_sed = fopen(ACC_OPENCL_SEDBIN, "rb");
@@ -1526,10 +1552,16 @@ int c_dbcsr_acc_opencl_kernel(int source_is_file, const char source[], const cha
15261552
fclose(file_sed); /* existence-check */
15271553
}
15281554
# endif
1529-
nchar = LIBXSMM_SNPRINTF(buffer, ACC_OPENCL_BUFFERSIZE,
1530-
ACC_OPENCL_CPPBIN " -P -C -nostdinc -DACC_OPENCL_VERSION=%u -DACC_OPENCL_C_VERSION=%u %s %s %s %s >%s", std_level,
1531-
std_clevel, 0 == devinfo->nv ? "" : "-D__NV_CL_C_VERSION", NULL != build_params ? build_params : "", buffer_name,
1532-
sed_pattern, dump_filename);
1555+
nchar = LIBXSMM_SNPRINTF(
1556+
buffer, ACC_OPENCL_BUFFERSIZE, ACC_OPENCL_CPPBIN " -P -C -nostdinc %s", 0 == devinfo->nv ? "" : "-D__NV_CL_C_VERSION ");
1557+
if (0 < nchar && ACC_OPENCL_BUFFERSIZE > nchar) {
1558+
int n = c_dbcsr_acc_opencl_defines(build_params, buffer + nchar, ACC_OPENCL_BUFFERSIZE - nchar, 0 /*cleanup*/);
1559+
if (0 <= n && ACC_OPENCL_BUFFERSIZE > (nchar += n)) {
1560+
n = LIBXSMM_SNPRINTF(buffer + nchar, ACC_OPENCL_BUFFERSIZE - nchar,
1561+
' ' != buffer[nchar - 1] ? " %s %s >%s" : "%s %s >%s", buffer_name, sed_pattern, dump_filename);
1562+
}
1563+
nchar = (0 <= n ? nchar : 0) + n;
1564+
}
15331565
if (0 < nchar && ACC_OPENCL_BUFFERSIZE > nchar && EXIT_SUCCESS == system(buffer)) {
15341566
FILE* const file = fopen(dump_filename, "r");
15351567
if (NULL != file) {
@@ -1559,44 +1591,20 @@ int c_dbcsr_acc_opencl_kernel(int source_is_file, const char source[], const cha
15591591
}
15601592
}
15611593
program = clCreateProgramWithSource(devinfo->context, 1 /*nlines*/, &ext_source, NULL, &result);
1594+
assert(EXIT_SUCCESS != result || NULL != program);
15621595
if (EXIT_SUCCESS == result) {
1563-
assert(NULL != program);
1564-
if (0 != devinfo->intel && 0x0bd0 <= devinfo->uid && 0x0bdb >= devinfo->uid) {
1565-
nchar = LIBXSMM_SNPRINTF(buffer, ACC_OPENCL_BUFFERSIZE, "-igc_opts 'VISAOptions=-PVCSendWARWA'");
1566-
}
1567-
else nchar = 0; /* no need to apply/check internal flags */
1568-
if (0 < nchar && ACC_OPENCL_BUFFERSIZE > nchar) { /* check if internal flags apply */
1569-
result = c_dbcsr_acc_opencl_flags(build_params, build_options, NULL, buffer + nchar, ACC_OPENCL_BUFFERSIZE - nchar);
1570-
if (EXIT_SUCCESS == result) {
1571-
result = clBuildProgram(program, 1 /*num_devices*/, &device_id, buffer + nchar, NULL /*callback*/, NULL /*user_data*/);
1572-
if (EXIT_SUCCESS == result) {
1573-
ACC_OPENCL_EXPECT(EXIT_SUCCESS == clReleaseProgram(program)); /* avoid unclean state */
1574-
program = clCreateProgramWithSource(devinfo->context, 1 /*nlines*/, &ext_source, NULL, &result);
1575-
assert(EXIT_SUCCESS != result || NULL != program);
1576-
}
1577-
else nchar = 0; /* failed to apply internal flags */
1578-
}
1579-
}
1580-
if (EXIT_SUCCESS == result) {
1581-
result = c_dbcsr_acc_opencl_flags(
1582-
build_params, build_options, try_build_options, buffer + nchar, ACC_OPENCL_BUFFERSIZE - nchar);
1583-
}
1584-
if (EXIT_SUCCESS == result) {
1585-
result = clBuildProgram(program, 1 /*num_devices*/, &device_id, buffer + nchar, NULL /*callback*/, NULL /*user_data*/);
1586-
}
1587-
if (EXIT_SUCCESS != result && NULL != try_build_options && '\0' != *try_build_options) {
1588-
result = c_dbcsr_acc_opencl_flags(
1589-
build_params, build_options, NULL /*try_build_options*/, buffer + nchar, ACC_OPENCL_BUFFERSIZE);
1596+
ok = c_dbcsr_acc_opencl_kernel_flags(build_params, build_options, try_options, program, buffer, ACC_OPENCL_BUFFERSIZE);
1597+
if (EXIT_SUCCESS == ok) result = ok;
1598+
else {
1599+
program = clCreateProgramWithSource(devinfo->context, 1 /*nlines*/, &ext_source, NULL, &result);
1600+
assert(EXIT_SUCCESS != result || NULL != program);
15901601
if (EXIT_SUCCESS == result) {
1591-
ACC_OPENCL_EXPECT(EXIT_SUCCESS == clReleaseProgram(program)); /* avoid unclean state */
1592-
program = clCreateProgramWithSource(devinfo->context, 1 /*nlines*/, &ext_source, NULL, &result);
1593-
assert(EXIT_SUCCESS != result || NULL != program);
1594-
if (EXIT_SUCCESS == result) {
1595-
result = clBuildProgram(program, 1 /*num_devices*/, &device_id, buffer + nchar, NULL /*callback*/, NULL /*user_data*/);
1596-
}
1602+
result = clBuildProgram(program, 1 /*num_devices*/, &device_id, buffer, NULL /*callback*/, NULL /*user_data*/);
1603+
ok = EXIT_FAILURE;
15971604
}
1598-
ok = EXIT_FAILURE;
15991605
}
1606+
}
1607+
if (EXIT_SUCCESS == result) {
16001608
if (source != ext_source) {
16011609
void* p = NULL;
16021610
LIBXSMM_ASSIGN127(&p, &ext_source);
@@ -1648,44 +1656,38 @@ int c_dbcsr_acc_opencl_kernel(int source_is_file, const char source[], const cha
16481656
program = clCreateProgramWithBinary(
16491657
devinfo->context, 1, &device_id, &size_src, (const unsigned char**)&source, NULL /*binary_status*/, &result);
16501658
}
1659+
assert(EXIT_SUCCESS != result || NULL != program);
16511660
if (EXIT_SUCCESS == result) {
1652-
assert(NULL != program);
1653-
result = c_dbcsr_acc_opencl_flags(build_params, build_options, try_build_options, buffer, ACC_OPENCL_BUFFERSIZE);
1654-
if (EXIT_SUCCESS == result) {
1655-
result = clBuildProgram(program, 1 /*num_devices*/, &device_id, buffer, NULL /*callback*/, NULL /*user_data*/);
1656-
}
1657-
if (EXIT_SUCCESS != result && NULL != try_build_options && '\0' != *try_build_options) {
1658-
result = c_dbcsr_acc_opencl_flags(build_params, build_options, NULL /*try_build_options*/, buffer, ACC_OPENCL_BUFFERSIZE);
1659-
if (EXIT_SUCCESS == result) {
1660-
ACC_OPENCL_EXPECT(EXIT_SUCCESS == clReleaseProgram(program)); /* avoid unclean state */
1661+
ok = c_dbcsr_acc_opencl_kernel_flags(build_params, build_options, try_options, program, buffer, ACC_OPENCL_BUFFERSIZE);
1662+
if (EXIT_SUCCESS == ok) result = ok;
1663+
else {
16611664
# if defined(CL_VERSION_2_1)
1662-
if (0 != c_dbcsr_acc_opencl_config.dump) program = clCreateProgramWithIL(devinfo->context, source, size_src, &result);
1663-
else
1665+
if (0 != c_dbcsr_acc_opencl_config.dump) program = clCreateProgramWithIL(devinfo->context, source, size_src, &result);
1666+
else
16641667
# endif
1665-
{
1666-
program = clCreateProgramWithBinary(
1667-
devinfo->context, 1, &device_id, &size_src, (const unsigned char**)&source, NULL /*binary_status*/, &result);
1668-
}
1669-
assert(EXIT_SUCCESS != result || NULL != program);
1670-
if (EXIT_SUCCESS == result) {
1671-
result = clBuildProgram(program, 1 /*num_devices*/, &device_id, buffer, NULL /*callback*/, NULL /*user_data*/);
1672-
}
1668+
{
1669+
program = clCreateProgramWithBinary(
1670+
devinfo->context, 1, &device_id, &size_src, (const unsigned char**)&source, NULL /*binary_status*/, &result);
1671+
}
1672+
assert(EXIT_SUCCESS != result || NULL != program);
1673+
if (EXIT_SUCCESS == result) {
1674+
result = clBuildProgram(program, 1 /*num_devices*/, &device_id, buffer, NULL /*callback*/, NULL /*user_data*/);
1675+
ok = EXIT_FAILURE;
16731676
}
1674-
ok = EXIT_FAILURE;
16751677
}
1676-
if (EXIT_SUCCESS == result) {
1677-
*kernel = clCreateKernel(program, kernel_name, &result);
1678+
}
1679+
if (EXIT_SUCCESS == result) {
1680+
*kernel = clCreateKernel(program, kernel_name, &result);
16781681
# if defined(CL_VERSION_1_2)
1679-
/* error creating kernel: discover available kernels in program, and adopt the last kernel listed */
1680-
if (EXIT_SUCCESS != result &&
1681-
EXIT_SUCCESS == clGetProgramInfo(program, CL_PROGRAM_KERNEL_NAMES, sizeof(char*), buffer, NULL) && '\0' != *buffer)
1682-
{
1683-
const char *const semicolon = strrchr(buffer, ';'), *const name = (NULL == semicolon ? buffer : (semicolon + 1));
1684-
*kernel = clCreateKernel(program, name, &result);
1685-
}
1686-
# endif
1687-
assert(EXIT_SUCCESS != result || NULL != *kernel);
1682+
/* error creating kernel: discover available kernels in program, and adopt the last kernel listed */
1683+
if (EXIT_SUCCESS != result &&
1684+
EXIT_SUCCESS == clGetProgramInfo(program, CL_PROGRAM_KERNEL_NAMES, sizeof(char*), buffer, NULL) && '\0' != *buffer)
1685+
{
1686+
const char *const semicolon = strrchr(buffer, ';'), *const name = (NULL == semicolon ? buffer : (semicolon + 1));
1687+
*kernel = clCreateKernel(program, name, &result);
16881688
}
1689+
# endif
1690+
assert(EXIT_SUCCESS != result || NULL != *kernel);
16891691
}
16901692
}
16911693
if (NULL != file_src) {

‎src/acc/opencl/acc_opencl.h‎

Lines changed: 8 additions & 6 deletions
Original file line numberDiff line numberDiff line change
@@ -410,6 +410,14 @@ int c_dbcsr_acc_opencl_device_ext(cl_device_id device, const char* const extname
410410
int c_dbcsr_acc_opencl_create_context(cl_device_id device_id, cl_context* context);
411411
/** Internal variant of c_dbcsr_acc_set_active_device. */
412412
int c_dbcsr_acc_opencl_set_active_device(ACC_OPENCL_LOCKTYPE* lock, int device_id);
413+
/** Assemble flags to support atomic operations. */
414+
int c_dbcsr_acc_opencl_flags_atomics(const c_dbcsr_acc_opencl_device_t* devinfo, c_dbcsr_acc_opencl_atomic_fp_t kind,
415+
const char* exts[], size_t* exts_maxlen, char flags[], size_t flags_maxlen);
416+
/** Assemble given defines and internal definitions. */
417+
int c_dbcsr_acc_opencl_defines(const char defines[], char buffer[], size_t buffer_size, int cleanup);
418+
/** Combines build-params, build-options, and extra flags. */
419+
int c_dbcsr_acc_opencl_kernel_flags(const char build_params[], const char build_options[], const char try_options[],
420+
cl_program program, char buffer[], size_t buffer_size);
413421
/**
414422
* Build kernel from source with given kernel_name, build_params and build_options.
415423
* The build_params are meant to instantiate the kernel (-D) whereas build_options
@@ -420,12 +428,6 @@ int c_dbcsr_acc_opencl_kernel(int source_is_file, const char source[], const cha
420428
cl_kernel* kernel);
421429
/** Per-thread variant of c_dbcsr_acc_device_synchronize. */
422430
int c_dbcsr_acc_opencl_device_synchronize(ACC_OPENCL_LOCKTYPE* lock, int thread_id);
423-
/** Assemble flags to support atomic operations. */
424-
int c_dbcsr_acc_opencl_flags_atomics(const c_dbcsr_acc_opencl_device_t* devinfo, c_dbcsr_acc_opencl_atomic_fp_t kind,
425-
const char* exts[], size_t* exts_maxlen, char flags[], size_t flags_maxlen);
426-
/** Combines build-params and build-options, optional flags (try_build_options). */
427-
int c_dbcsr_acc_opencl_flags(
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const char build_params[], const char build_options[], const char try_build_options[], char buffer[], size_t buffer_size);
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/** To support USM, call this function for pointer arguments instead of clSetKernelArg. */
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int c_dbcsr_acc_opencl_set_kernel_ptr(cl_kernel kernel, cl_uint arg_index, const void* arg_value);
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