← → keys · t: theme
reference build
{
"command": "g++ -O2 -std=c++17 examples/saxpy/saxpy_ref.cpp -o build/reference",
"returncode": 0,
"duration_s": 0.22793,
"stdout": "",
"stderr": "",
"cwd": "."
}migrate ok
migrated 1 CUDA file(s) -> 1 file(s); 1 DPCT warning(s) (DPCT1009x1)
Model text · iteration 1
No text this turn; the model went straight to tool calls.
Tool input
{}
Limitations the tool reported
c2s output compiles only with the dpct helper headers on the include path (<c2s install>/include).
Migration warnings say what c2s could not translate; they do not prove the rest is correct. Run compile + verify.
Evidence
evidence JSON (2,056 chars) · source hash e53316efe9db7d67
{
"run": {
"command": "/opt/syclomatic/bin/c2s --in-root=examples/saxpy --out-root=migrated --cuda-include-path=/opt/cuda-headers/targets/x86_64-linux/include examples/saxpy/saxpy.cu",
"returncode": 0,
"duration_s": 2.013123,
"stdout": "NOTE: Could not auto-detect compilation database for file 'saxpy.cu' in 'examples/saxpy' or any parent directory.\nParsing: examples/saxpy/saxpy.cu\nAnalyzing: examples/saxpy/saxpy.cu\nMigrating: examples/saxpy/saxpy.cu\nProcessed 1 file(s) in -in-root folder \"examples/saxpy\"\n\nSee Diagnostics Reference to resolve warnings and complete the migration:\nhttps://oneapi-src.github.io/SYCLomatic/dev_guide/reference/diagnostics-reference.html\n",
"stderr": "examples/saxpy/saxpy.cu:34:46: warning: DPCT1009:0: SYCL reports errors using exceptions and does not use error codes. Please replace the \"get_error_string_dummy(...)\" with a real error-handling function.\n 34 | std::fprintf(stderr, \"CUDA error: %s\\n\", cudaGetErrorString(err));\n | ^\n\n"
},
"input_files": [
"examples/saxpy/saxpy.cu"
],
"in_root": "examples/saxpy",
"out_dir": "migrated",
"migrated_files": [
"saxpy.dp.cpp"
],
"warnings": [
{
"code": "DPCT1009",
"id": 0,
"message": "SYCL reports errors using exceptions and does not use error codes. Please replace the \"get_error_string_dummy(...)\" with a real error-handling function.",
"file": "examples/saxpy/saxpy.cu",
"line": 34,
"column": 46,
"migrated_file": null,
"migrated_line": null
}
],
"warning_counts": {
"DPCT1009": 1
},
"errors": []
}read_file ok
saxpy.dp.cpp: 2272 chars
Model text · iteration 2
No text this turn; the model went straight to tool calls.
Tool input
{
"path": "migrated/saxpy.dp.cpp"
}
Evidence
evidence JSON (2,671 chars) · source hash e53316efe9db7d67
{
"path": "migrated/saxpy.dp.cpp",
"content": "// CUDA SAXPY (the code to be ported). Unified memory, error checks, event timing.\n// Usage: saxpy <out.bin> [n=1048576]\n#define DPCT_PROFILING_ENABLED\n#include <sycl/sycl.hpp>\n#include <dpct/dpct.hpp>\n#include <cstdio>\n#include <cstdlib>\n\nvoid saxpy(int n, float a, const float* x, float* y) {\n auto item_ct1 = sycl::ext::oneapi::this_work_item::get_nd_item<3>();\n int i = item_ct1.get_group(2) * item_ct1.get_local_range(2) +\n item_ct1.get_local_id(2);\n if (i < n) y[i] = a * x[i] + y[i];\n}\n\nint main(int argc, char **argv) try {\n dpct::device_ext &dev_ct1 = dpct::get_current_device();\n sycl::queue &q_ct1 = dev_ct1.in_order_queue();\n if (argc < 2) {\n std::fprintf(stderr, \"usage: %s out.bin [n]\\n\", argv[0]);\n return 2;\n }\n const int n = argc > 2 ? std::atoi(argv[2]) : (1 << 20);\n const float a = 2.5f;\n float *x, *y;\n x = sycl::malloc_shared<float>(n, q_ct1);\n y = sycl::malloc_shared<float>(n, q_ct1);\n for (int i = 0; i < n; ++i) {\n x[i] = static_cast<float>(i % 1000) * 0.001f;\n y[i] = static_cast<float>((i * 7) % 1000) * 0.002f;\n }\n dpct::event_ptr start, stop;\n start = new sycl::event();\n stop = new sycl::event();\n dpct::sync_barrier(start);\n q_ct1.parallel_for(sycl::nd_range<3>(sycl::range<3>(1, 1, (n + 255) / 256) *\n sycl::range<3>(1, 1, 256),\n sycl::range<3>(1, 1, 256)),\n [=](sycl::nd_item<3> item_ct1) {\n saxpy(n, a, x, y);\n });\n dpct::sync_barrier(stop);\n dpct::err0 err = DPCT_CHECK_ERROR(dev_ct1.queues_wait_and_throw());\n\n float ms = 0.f;\n ms =\n (stop->get_profiling_info<sycl::info::event_profiling::command_end>() -\n start\n ->get_profiling_info<sycl::info::event_profiling::command_start>()) /\n 1000000.0f;\n std::printf(\"kernel_ms=%f\\n\", ms);\n FILE* f = std::fopen(argv[1], \"wb\");\n if (!f || std::fwrite(y, sizeof(float), n, f) != static_cast<size_t>(n)) return 1;\n std::fclose(f);\n dpct::dpct_free(x, q_ct1);\n dpct::dpct_free(y, q_ct1);\n return 0;\n}\ncatch (sycl::exception const &exc) {\n std::cerr << exc.what() << \"Exception caught at file:\" << __FILE__\n << \", line:\" << __LINE__ << std::endl;\n std::exit(1);\n}\n"
}write_file ok
wrote migrated/saxpy.dp.cpp (1448 chars)
Model text · iteration 3
No text this turn; the model went straight to tool calls.
Tool input
{
"path": "migrated/saxpy.dp.cpp",
"content": "<45 lines; diff below>"
}
Diff vs previous version in this trace · +23 −41
--- a/migrated/saxpy.dp.cpp+++ b/migrated/saxpy.dp.cpp@@ -1,63 +1,45 @@-// CUDA SAXPY (the code to be ported). Unified memory, error checks, event timing.+// SYCL SAXPY. USM shared memory, exception-based error handling, event profiling. // Usage: saxpy <out.bin> [n=1048576]-#define DPCT_PROFILING_ENABLED #include <sycl/sycl.hpp>-#include <dpct/dpct.hpp> #include <cstdio> #include <cstdlib>--void saxpy(int n, float a, const float* x, float* y) {- auto item_ct1 = sycl::ext::oneapi::this_work_item::get_nd_item<3>();- int i = item_ct1.get_group(2) * item_ct1.get_local_range(2) +- item_ct1.get_local_id(2);- if (i < n) y[i] = a * x[i] + y[i];-}+#include <iostream> int main(int argc, char **argv) try {- dpct::device_ext &dev_ct1 = dpct::get_current_device();- sycl::queue &q_ct1 = dev_ct1.in_order_queue(); if (argc < 2) { std::fprintf(stderr, "usage: %s out.bin [n]\n", argv[0]); return 2; } const int n = argc > 2 ? std::atoi(argv[2]) : (1 << 20); const float a = 2.5f;- float *x, *y;- x = sycl::malloc_shared<float>(n, q_ct1);- y = sycl::malloc_shared<float>(n, q_ct1);++ sycl::queue q{sycl::property::queue::in_order{},+ sycl::property::queue::enable_profiling{}};++ float *x = sycl::malloc_shared<float>(n, q);+ float *y = sycl::malloc_shared<float>(n, q); for (int i = 0; i < n; ++i) { x[i] = static_cast<float>(i % 1000) * 0.001f; y[i] = static_cast<float>((i * 7) % 1000) * 0.002f; }- dpct::event_ptr start, stop;- start = new sycl::event();- stop = new sycl::event();- dpct::sync_barrier(start);- q_ct1.parallel_for(sycl::nd_range<3>(sycl::range<3>(1, 1, (n + 255) / 256) *- sycl::range<3>(1, 1, 256),- sycl::range<3>(1, 1, 256)),- [=](sycl::nd_item<3> item_ct1) {- saxpy(n, a, x, y);- });- dpct::sync_barrier(stop);- dpct::err0 err = DPCT_CHECK_ERROR(dev_ct1.queues_wait_and_throw()); - float ms = 0.f;- ms =- (stop->get_profiling_info<sycl::info::event_profiling::command_end>() -- start- ->get_profiling_info<sycl::info::event_profiling::command_start>()) /- 1000000.0f;+ sycl::event ev = q.parallel_for(sycl::range<1>(n), [=](sycl::id<1> idx) {+ y[idx] = a * x[idx] + y[idx];+ });+ ev.wait_and_throw();++ float ms = (ev.get_profiling_info<sycl::info::event_profiling::command_end>() -+ ev.get_profiling_info<sycl::info::event_profiling::command_start>()) /+ 1000000.0f; std::printf("kernel_ms=%f\n", ms);- FILE* f = std::fopen(argv[1], "wb");++ FILE *f = std::fopen(argv[1], "wb"); if (!f || std::fwrite(y, sizeof(float), n, f) != static_cast<size_t>(n)) return 1; std::fclose(f);- dpct::dpct_free(x, q_ct1);- dpct::dpct_free(y, q_ct1);+ sycl::free(x, q);+ sycl::free(y, q); return 0;+} catch (sycl::exception const &exc) {+ std::cerr << "SYCL error: " << exc.what() << std::endl;+ return 1; }-catch (sycl::exception const &exc) {- std::cerr << exc.what() << "Exception caught at file:" << __FILE__- << ", line:" << __LINE__ << std::endl;- std::exit(1);-}
full file as written
// SYCL SAXPY. USM shared memory, exception-based error handling, event profiling.
// Usage: saxpy <out.bin> [n=1048576]
#include <sycl/sycl.hpp>
#include <cstdio>
#include <cstdlib>
#include <iostream>
int main(int argc, char **argv) try {
if (argc < 2) {
std::fprintf(stderr, "usage: %s out.bin [n]\n", argv[0]);
return 2;
}
const int n = argc > 2 ? std::atoi(argv[2]) : (1 << 20);
const float a = 2.5f;
sycl::queue q{sycl::property::queue::in_order{},
sycl::property::queue::enable_profiling{}};
float *x = sycl::malloc_shared<float>(n, q);
float *y = sycl::malloc_shared<float>(n, q);
for (int i = 0; i < n; ++i) {
x[i] = static_cast<float>(i % 1000) * 0.001f;
y[i] = static_cast<float>((i * 7) % 1000) * 0.002f;
}
sycl::event ev = q.parallel_for(sycl::range<1>(n), [=](sycl::id<1> idx) {
y[idx] = a * x[idx] + y[idx];
});
ev.wait_and_throw();
float ms = (ev.get_profiling_info<sycl::info::event_profiling::command_end>() -
ev.get_profiling_info<sycl::info::event_profiling::command_start>()) /
1000000.0f;
std::printf("kernel_ms=%f\n", ms);
FILE *f = std::fopen(argv[1], "wb");
if (!f || std::fwrite(y, sizeof(float), n, f) != static_cast<size_t>(n)) return 1;
std::fclose(f);
sycl::free(x, q);
sycl::free(y, q);
return 0;
} catch (sycl::exception const &exc) {
std::cerr << "SYCL error: " << exc.what() << std::endl;
return 1;
}
Evidence
evidence JSON (57 chars) · source hash 480df09f55cbb5d1
{
"path": "migrated/saxpy.dp.cpp"
}compile fail
compile failed with 1 error(s) at migrated/saxpy.dp.cpp:16: no matching constructor for initialization of 'sycl::queue'
Model text · iteration 3
No text this turn; the model went straight to tool calls.
Tool input
{
"sources": [
"migrated/saxpy.dp.cpp"
],
"add_dpct_include": false
}
Limitations the tool reported
A successful compile says nothing about numerical correctness; run verify.
Evidence
evidence JSON (16,781 chars) · source hash 480df09f55cbb5d1
{
"run": {
"command": "/opt/dpcpp/bin/icpx -fsycl -O2 migrated/saxpy.dp.cpp -o build/candidate",
"returncode": 1,
"duration_s": 1.83894,
"stdout": "",
"stderr": "migrated/saxpy.dp.cpp:16:15: error: no matching constructor for initialization of 'sycl::queue'\n 16 | sycl::queue q{sycl::property::queue::in_order{},\n | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n 17 | sycl::property::queue::enable_profiling{}};\n | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n/opt/dpcpp/bin/compiler/../../include/sycl/queue.hpp:227:3: note: candidate constructor not viable: no known conversion from 'sycl::property::queue::in_order' to 'const async_handler' (aka 'const std::function<void (sycl::exception_list)>') for 1st argument\n 227 | queue(const async_handler &AsyncHandler, const property_list &PropList = {})\n | ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n/opt/dpcpp/bin/compiler/../../include/sycl/queue.hpp:296:3: note: candidate constructor not viable: no known conversion from 'sycl::property::queue::in_order' to 'const device_selector' for 1st argument\n 296 | queue(const device_selector &DeviceSelector,\n | ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n/opt/dpcpp/bin/compiler/../../include/sycl/queue.hpp:317:12: note: candidate constructor not viable: no known conversion from 'sycl::property::queue::in_order' to 'const device' for 1st argument\n 317 | explicit queue(const device &SyclDevice, const property_list &PropList = {})\n | ^ ~~~~~~~~~~~~~~~~~~~~~~~~\n/opt/dpcpp/bin/compiler/../../include/sycl/queue.hpp:309:3: note: candidate constructor not viable: no known conversion from 'sycl::property::queue::in_order' to 'const device_selector' for 1st argument\n 309 | queue(const device_selector &DeviceSelector,\n | ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n/opt/dpcpp/bin/compiler/../../include/sycl/queue.hpp:326:12: note: candidate constructor not viable: no known conversion from 'sycl::property::queue::in_order' to 'const device' for 1st argument\n 326 | explicit queue(const device &SyclDevice, const async_handler &AsyncHandler,\n | ^ ~~~~~~~~~~~~~~~~~~~~~~~~\n/opt/dpcpp/bin/compiler/../../include/sycl/queue.hpp:337:3: note: candidate constructor not viable: no known conversion from 'sycl::property::queue::in_order' to 'const context' for 1st argument\n 337 | queue(const context &SyclContext, const device_selector &DeviceSelector,\n | ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~\n/opt/dpcpp/bin/compiler/../../include/sycl/queue.hpp:359:3: note: candidate constructor not viable: no known conversion from 'sycl::property::queue::in_order' to 'const context' for 1st argument\n 359 | queue(const context &SyclContext, const device &SyclDevice,\n | ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~\n/opt/dpcpp/bin/compiler/../../include/sycl/queue.hpp:239:12: note: candidate template ignored: requirement 'std::is_invocable_r_v<int, sycl::property::queue::in_order &, const sycl::device &>' was not satisfied [with DeviceSelector = sycl::property::queue::in_order]\n 239 | explicit queue(const DeviceSelector &deviceSelector,\n | ^\n/opt/dpcpp/bin/compiler/../../include/sycl/queue.hpp:252:12: note: candidate template ignored: requirement 'std::is_invocable_r_v<int, sycl::property::queue::in_order &, const sycl::device &>' was not satisfied [with DeviceSelector = sycl::property::queue::in_order]\n 252 | explicit queue(const DeviceSelector &deviceSelector,\n | ^\n/opt/dpcpp/bin/compiler/../../include/sycl/queue.hpp:266:12: note: candidate template ignored: requirement 'std::is_invocable_r_v<int, sycl::property::queue::enable_profiling &, const sycl::device &>' was not satisfied [with DeviceSelector = sycl::property::queue::enable_profiling]\n 266 | explicit queue(const context &syclContext,\n | ^\n/opt/dpcpp/bin/compiler/../../include/sycl/queue.hpp:219:12: note: candidate constructor not viable: allows at most single argument 'PropList', but 2 arguments were provided\n 219 | explicit queue(const property_list &PropList = {})\n | ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n/opt/dpcpp/bin/compiler/../../include/sycl/queue.hpp:385:3: note: candidate constructor not viable: requires single argument 'RHS', but 2 arguments were provided\n 385 | queue(const queue &RHS) = default;\n | ^ ~~~~~~~~~~~~~~~~\n/opt/dpcpp/bin/compiler/../../include/sycl/queue.hpp:387:3: note: candidate constructor not viable: requires single argument 'RHS', but 2 arguments were provided\n 387 | queue(queue &&RHS) = default;\n | ^ ~~~~~~~~~~~\n/opt/dpcpp/bin/compiler/../../include/sycl/queue.hpp:3639:3: note: candidate constructor not viable: requires single argument 'impl', but 2 arguments were provided\n 3639 | queue(std::shared_ptr<detail::queue_impl> impl) : impl(impl) {}\n | ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n/opt/dpcpp/bin/compiler/../../include/sycl/queue.hpp:350:3: note: candidate constructor not viable: requires at least 3 arguments, but 2 were provided\n 350 | queue(const context &SyclContext, const device_selector &DeviceSelector,\n | ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n 351 | const async_handler &AsyncHandler, const property_list &PropList = {});\n | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n/opt/dpcpp/bin/compiler/../../include/sycl/queue.hpp:369:3: note: candidate constructor not viable: requires at least 3 arguments, but 2 were provided\n 369 | queue(const context &SyclContext, const device &SyclDevice,\n | ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n 370 | const async_handler &AsyncHandler, const property_list &PropList = {});\n | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n/opt/dpcpp/bin/compiler/../../include/sycl/queue.hpp:282:12: note: candidate constructor template not viable: requires at least 3 arguments, but 2 were provided\n 282 | explicit queue(const context &syclContext,\n | ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~\n 283 | const DeviceSelector &deviceSelector,\n | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n 284 | const async_handler &AsyncHandler,\n | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n 285 | const property_list &propList = {})\n | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n1 error generated.\n"
},
"output": "build/candidate",
"dpct_include_added": null,
"diagnostics": [
{
"file": "migrated/saxpy.dp.cpp",
"line": 16,
"column": 15,
"severity": "error",
"message": "no matching constructor for initialization of 'sycl::queue'",
"flag": null,
"snippet": " sycl::queue q{sycl::property::queue::in_order{},"
},
{
"file": "/opt/dpcpp/bin/compiler/../../include/sycl/queue.hpp",
"line": 227,
"column": 3,
"severity": "note",
"message": "candidate constructor not viable: no known conversion from 'sycl::property::queue::in_order' to 'const async_handler' (aka 'const std::function<void (sycl::exception_list)>') for 1st argument",
"flag": null,
"snippet": " queue(const async_handler &AsyncHandler, const property_list &PropList = {})"
},
{
"file": "/opt/dpcpp/bin/compiler/../../include/sycl/queue.hpp",
"line": 296,
"column": 3,
"severity": "note",
"message": "candidate constructor not viable: no known conversion from 'sycl::property::queue::in_order' to 'const device_selector' for 1st argument",
"flag": null,
"snippet": " queue(const device_selector &DeviceSelector,"
},
{
"file": "/opt/dpcpp/bin/compiler/../../include/sycl/queue.hpp",
"line": 317,
"column": 12,
"severity": "note",
"message": "candidate constructor not viable: no known conversion from 'sycl::property::queue::in_order' to 'const device' for 1st argument",
"flag": null,
"snippet": " explicit queue(const device &SyclDevice, const property_list &PropList = {})"
},
{
"file": "/opt/dpcpp/bin/compiler/../../include/sycl/queue.hpp",
"line": 309,
"column": 3,
"severity": "note",
"message": "candidate constructor not viable: no known conversion from 'sycl::property::queue::in_order' to 'const device_selector' for 1st argument",
"flag": null,
"snippet": " queue(const device_selector &DeviceSelector,"
},
{
"file": "/opt/dpcpp/bin/compiler/../../include/sycl/queue.hpp",
"line": 326,
"column": 12,
"severity": "note",
"message": "candidate constructor not viable: no known conversion from 'sycl::property::queue::in_order' to 'const device' for 1st argument",
"flag": null,
"snippet": " explicit queue(const device &SyclDevice, const async_handler &AsyncHandler,"
},
{
"file": "/opt/dpcpp/bin/compiler/../../include/sycl/queue.hpp",
"line": 337,
"column": 3,
"severity": "note",
"message": "candidate constructor not viable: no known conversion from 'sycl::property::queue::in_order' to 'const context' for 1st argument",
"flag": null,
"snippet": " queue(const context &SyclContext, const device_selector &DeviceSelector,"
},
{
"file": "/opt/dpcpp/bin/compiler/../../include/sycl/queue.hpp",
"line": 359,
"column": 3,
"severity": "note",
"message": "candidate constructor not viable: no known conversion from 'sycl::property::queue::in_order' to 'const context' for 1st argument",
"flag": null,
"snippet": " queue(const context &SyclContext, const device &SyclDevice,"
},
{
"file": "/opt/dpcpp/bin/compiler/../../include/sycl/queue.hpp",
"line": 239,
"column": 12,
"severity": "note",
"message": "candidate template ignored: requirement 'std::is_invocable_r_v<int, sycl::property::queue::in_order &, const sycl::device &>' was not satisfied [with DeviceSelector = sycl::property::queue::in_order]",
"flag": null,
"snippet": " explicit queue(const DeviceSelector &deviceSelector,"
},
{
"file": "/opt/dpcpp/bin/compiler/../../include/sycl/queue.hpp",
"line": 252,
"column": 12,
"severity": "note",
"message": "candidate template ignored: requirement 'std::is_invocable_r_v<int, sycl::property::queue::in_order &, const sycl::device &>' was not satisfied [with DeviceSelector = sycl::property::queue::in_order]",
"flag": null,
"snippet": " explicit queue(const DeviceSelector &deviceSelector,"
},
{
"file": "/opt/dpcpp/bin/compiler/../../include/sycl/queue.hpp",
"line": 266,
"column": 12,
"severity": "note",
"message": "candidate template ignored: requirement 'std::is_invocable_r_v<int, sycl::property::queue::enable_profiling &, const sycl::device &>' was not satisfied [with DeviceSelector = sycl::property::queue::enable_profiling]",
"flag": null,
"snippet": " explicit queue(const context &syclContext,"
},
{
"file": "/opt/dpcpp/bin/compiler/../../include/sycl/queue.hpp",
"line": 219,
"column": 12,
"severity": "note",
"message": "candidate constructor not viable: allows at most single argument 'PropList', but 2 arguments were provided",
"flag": null,
"snippet": " explicit queue(const property_list &PropList = {})"
},
{
"file": "/opt/dpcpp/bin/compiler/../../include/sycl/queue.hpp",
"line": 385,
"column": 3,
"severity": "note",
"message": "candidate constructor not viable: requires single argument 'RHS', but 2 arguments were provided",
"flag": null,
"snippet": " queue(const queue &RHS) = default;"
},
{
"file": "/opt/dpcpp/bin/compiler/../../include/sycl/queue.hpp",
"line": 387,
"column": 3,
"severity": "note",
"message": "candidate constructor not viable: requires single argument 'RHS', but 2 arguments were provided",
"flag": null,
"snippet": " queue(queue &&RHS) = default;"
},
{
"file": "/opt/dpcpp/bin/compiler/../../include/sycl/queue.hpp",
"line": 3639,
"column": 3,
"severity": "note",
"message": "candidate constructor not viable: requires single argument 'impl', but 2 arguments were provided",
"flag": null,
"snippet": " queue(std::shared_ptr<detail::queue_impl> impl) : impl(impl) {}"
},
{
"file": "/opt/dpcpp/bin/compiler/../../include/sycl/queue.hpp",
"line": 350,
"column": 3,
"severity": "note",
"message": "candidate constructor not viable: requires at least 3 arguments, but 2 were provided",
"flag": null,
"snippet": " queue(const context &SyclContext, const device_selector &DeviceSelector,"
},
{
"file": "/opt/dpcpp/bin/compiler/../../include/sycl/queue.hpp",
"line": 369,
"column": 3,
"severity": "note",
"message": "candidate constructor not viable: requires at least 3 arguments, but 2 were provided",
"flag": null,
"snippet": " queue(const context &SyclContext, const device &SyclDevice,"
},
{
"file": "/opt/dpcpp/bin/compiler/../../include/sycl/queue.hpp",
"line": 282,
"column": 12,
"severity": "note",
"message": "candidate constructor template not viable: requires at least 3 arguments, but 2 were provided",
"flag": null,
"snippet": " explicit queue(const context &syclContext,"
}
],
"counts": {
"error": 1,
"warning": 0,
"note": 17
}
}read_file ok
saxpy.dp.cpp: 1448 chars
Model text · iteration 4
Need a property_list wrapper.
Tool input
{
"path": "migrated/saxpy.dp.cpp"
}
Evidence
evidence JSON (1,758 chars) · source hash 480df09f55cbb5d1
{
"path": "migrated/saxpy.dp.cpp",
"content": "// SYCL SAXPY. USM shared memory, exception-based error handling, event profiling.\n// Usage: saxpy <out.bin> [n=1048576]\n#include <sycl/sycl.hpp>\n#include <cstdio>\n#include <cstdlib>\n#include <iostream>\n\nint main(int argc, char **argv) try {\n if (argc < 2) {\n std::fprintf(stderr, \"usage: %s out.bin [n]\\n\", argv[0]);\n return 2;\n }\n const int n = argc > 2 ? std::atoi(argv[2]) : (1 << 20);\n const float a = 2.5f;\n\n sycl::queue q{sycl::property::queue::in_order{},\n sycl::property::queue::enable_profiling{}};\n\n float *x = sycl::malloc_shared<float>(n, q);\n float *y = sycl::malloc_shared<float>(n, q);\n for (int i = 0; i < n; ++i) {\n x[i] = static_cast<float>(i % 1000) * 0.001f;\n y[i] = static_cast<float>((i * 7) % 1000) * 0.002f;\n }\n\n sycl::event ev = q.parallel_for(sycl::range<1>(n), [=](sycl::id<1> idx) {\n y[idx] = a * x[idx] + y[idx];\n });\n ev.wait_and_throw();\n\n float ms = (ev.get_profiling_info<sycl::info::event_profiling::command_end>() -\n ev.get_profiling_info<sycl::info::event_profiling::command_start>()) /\n 1000000.0f;\n std::printf(\"kernel_ms=%f\\n\", ms);\n\n FILE *f = std::fopen(argv[1], \"wb\");\n if (!f || std::fwrite(y, sizeof(float), n, f) != static_cast<size_t>(n)) return 1;\n std::fclose(f);\n sycl::free(x, q);\n sycl::free(y, q);\n return 0;\n} catch (sycl::exception const &exc) {\n std::cerr << \"SYCL error: \" << exc.what() << std::endl;\n return 1;\n}\n"
}write_file ok
wrote migrated/saxpy.dp.cpp (1489 chars)
Model text · iteration 5
No text this turn; the model went straight to tool calls.
Tool input
{
"path": "migrated/saxpy.dp.cpp",
"content": "<45 lines; diff below>"
}
Diff vs previous version in this trace · +2 −2
--- a/migrated/saxpy.dp.cpp+++ b/migrated/saxpy.dp.cpp@@ -13,8 +13,8 @@ const int n = argc > 2 ? std::atoi(argv[2]) : (1 << 20); const float a = 2.5f; - sycl::queue q{sycl::property::queue::in_order{},- sycl::property::queue::enable_profiling{}};+ sycl::queue q{sycl::property_list{sycl::property::queue::in_order{},+ sycl::property::queue::enable_profiling{}}}; float *x = sycl::malloc_shared<float>(n, q); float *y = sycl::malloc_shared<float>(n, q);
full file as written
// SYCL SAXPY. USM shared memory, exception-based error handling, event profiling.
// Usage: saxpy <out.bin> [n=1048576]
#include <sycl/sycl.hpp>
#include <cstdio>
#include <cstdlib>
#include <iostream>
int main(int argc, char **argv) try {
if (argc < 2) {
std::fprintf(stderr, "usage: %s out.bin [n]\n", argv[0]);
return 2;
}
const int n = argc > 2 ? std::atoi(argv[2]) : (1 << 20);
const float a = 2.5f;
sycl::queue q{sycl::property_list{sycl::property::queue::in_order{},
sycl::property::queue::enable_profiling{}}};
float *x = sycl::malloc_shared<float>(n, q);
float *y = sycl::malloc_shared<float>(n, q);
for (int i = 0; i < n; ++i) {
x[i] = static_cast<float>(i % 1000) * 0.001f;
y[i] = static_cast<float>((i * 7) % 1000) * 0.002f;
}
sycl::event ev = q.parallel_for(sycl::range<1>(n), [=](sycl::id<1> idx) {
y[idx] = a * x[idx] + y[idx];
});
ev.wait_and_throw();
float ms = (ev.get_profiling_info<sycl::info::event_profiling::command_end>() -
ev.get_profiling_info<sycl::info::event_profiling::command_start>()) /
1000000.0f;
std::printf("kernel_ms=%f\n", ms);
FILE *f = std::fopen(argv[1], "wb");
if (!f || std::fwrite(y, sizeof(float), n, f) != static_cast<size_t>(n)) return 1;
std::fclose(f);
sycl::free(x, q);
sycl::free(y, q);
return 0;
} catch (sycl::exception const &exc) {
std::cerr << "SYCL error: " << exc.what() << std::endl;
return 1;
}
Evidence
evidence JSON (57 chars) · source hash 508fdcd6783e2ef1
{
"path": "migrated/saxpy.dp.cpp"
}compile ok
compiled 1 source(s) -> build/candidate (0 warning(s))
Model text · iteration 5
No text this turn; the model went straight to tool calls.
Tool input
{
"sources": [
"migrated/saxpy.dp.cpp"
],
"add_dpct_include": false
}
Limitations the tool reported
A successful compile says nothing about numerical correctness; run verify.
Evidence
evidence JSON (510 chars) · source hash 508fdcd6783e2ef1
{
"run": {
"command": "/opt/dpcpp/bin/icpx -fsycl -O2 migrated/saxpy.dp.cpp -o build/candidate",
"returncode": 0,
"duration_s": 4.79759,
"stdout": "",
"stderr": ""
},
"output": "build/candidate",
"dpct_include_added": null,
"diagnostics": [],
"counts": {
"error": 0,
"warning": 0,
"note": 0
}
}scan_helpers ok
no dpct helpers in 1 file(s)
Model text · iteration 6
No text this turn; the model went straight to tool calls.
Tool input
{
"path": "migrated"
}
Limitations the tool reported
Static text scan: macros that expand to dpct:: calls, or helpers reached through user-defined wrappers, are not detected.
Zero helpers means the code no longer depends on dpct headers; it does not prove the code is correct or fast. Run compile + verify + benchmark.
Evidence
evidence JSON (363 chars) · source hash 508fdcd6783e2ef1
{
"path": "migrated",
"files_scanned": 1,
"total": 0,
"by_category": {},
"by_symbol": {},
"by_file": {},
"occurrences": [],
"occurrences_truncated": 0,
"suggestions": {},
"unresolved_dpct_comments": [],
"advisories": []
}verify ok
PASS: 1/1 case(s) match (worst max abs err 4.77e-07, atol 1e-06)
Model text · iteration 6
No text this turn; the model went straight to tool calls.
Tool input
{}
Loop saved a best-passing snapshot (iteration 6, 0 helper(s)): PASS: 1/1 case(s) match (worst max abs err 4.77e-07, atol 1e-06)
Limitations the tool reported
Equivalence is shown only for the inputs tested; other inputs/sizes may behave differently.
Evidence
evidence JSON (2,098 chars) · source hash 508fdcd6783e2ef1
{
"mode": "array",
"cases": [
{
"input": null,
"reference": {
"command": "build/reference verify_out/case0_reference.out",
"returncode": 0,
"duration_s": 0.031456,
"stdout": "",
"stderr": "",
"cwd": ".",
"output_file": "verify_out/case0_reference.out"
},
"candidate": {
"command": "build/candidate verify_out/case0_candidate.out",
"returncode": 0,
"duration_s": 0.233521,
"stdout": "kernel_ms=0.545565\n",
"stderr": "",
"cwd": ".",
"output_file": "verify_out/case0_candidate.out"
},
"reference_format": "f32",
"candidate_format": "f32",
"mode": "array",
"stats": {
"n_reference": 1048576,
"n_candidate": 1048576,
"atol": 1e-06,
"rtol": 0.0,
"max_ulp_allowed": null,
"passed": true,
"max_abs_err": 4.76837158203125e-07,
"rms_err": 9.132723682817551e-08,
"mean_abs_err": 3.60726772896669e-08,
"max_rel_err": 1.1857194791656045e-07,
"max_ulp_f32": 1,
"median_ulp_f32": 0.0,
"exact_matches": 853539,
"mismatches": 0,
"nan_mismatches": 0,
"reference_range": [
0.0,
4.4835004806518555
],
"first_mismatches": []
},
"passed": true
}
],
"work_dir": "verify_out",
"passed_cases": 1,
"total_cases": 1,
"worst_max_abs_err": 4.76837158203125e-07
}finish fail
rejected: verify+zero-helpers not both satisfied on current compiled sources
Model text · iteration 7
No text this turn; the model went straight to tool calls.
What the agent claims
Ported saxpy to idiomatic SYCL 2020: 1-D parallel_for over sycl::range<1>, USM shared memory, an in-order queue with profiling, and event-based kernel timing. Errors are handled with SYCL exceptions. It compiles without the dpct include path, scan_helpers reports 0 helpers, and verify passes (max abs error 4.77e-07 against atol 1e-6). I did not run the benchmark.
Evidence
evidence JSON (416 chars) · source hash 508fdcd6783e2ef1
{
"model_summary": "Ported saxpy to idiomatic SYCL 2020: 1-D parallel_for over sycl::range<1>, USM shared memory, an in-order queue with profiling, and event-based kernel timing. Errors are handled with SYCL exceptions. It compiles without the dpct include path, scan_helpers reports 0 helpers, and verify passes (max abs error 4.77e-07 against atol 1e-6). I did not run the benchmark."
}scan_helpers ok
no dpct helpers in 1 file(s)
Model text · iteration 8
No text this turn; the model went straight to tool calls.
Tool input
{}
Limitations the tool reported
Static text scan: macros that expand to dpct:: calls, or helpers reached through user-defined wrappers, are not detected.
Zero helpers means the code no longer depends on dpct headers; it does not prove the code is correct or fast. Run compile + verify + benchmark.
Evidence
evidence JSON (356 chars) · source hash 508fdcd6783e2ef1
{
"path": ".",
"files_scanned": 1,
"total": 0,
"by_category": {},
"by_symbol": {},
"by_file": {},
"occurrences": [],
"occurrences_truncated": 0,
"suggestions": {},
"unresolved_dpct_comments": [],
"advisories": []
}benchmark (by harness) ok
5 run(s) each; Intel(R) Xeon(R) Processor @ 2.10GHz: median 213.71 ms, p95 221.78 ms
Model text · iteration 8
No text this turn; the model went straight to tool calls.
Tool input
{
"runs": 5
}
Limitations the tool reported
Wall-clock time of the whole process (includes start-up, JIT compilation of SYCL kernels on first use, I/O). Use report_regex for in-program kernel timings.
Device selection uses ONEAPI_DEVICE_SELECTOR; it only takes effect if the program uses a default/selector-based sycl::queue.
Evidence
evidence JSON (1,640 chars) · source hash 508fdcd6783e2ef1
{
"command": "build/candidate verify_out/bench_out",
"runs": 5,
"warmup": 1,
"device_discovery": {
"sycl_ls": {
"command": "/opt/dpcpp/bin/sycl-ls",
"returncode": 0,
"duration_s": 0.033703,
"stdout": "[opencl:cpu][opencl:0] Intel(R) OpenCL, Intel(R) Xeon(R) Processor @ 2.10GHz OpenCL 3.0 (Build 0) [2026.21.7.0.24_160000]\n",
"stderr": ""
}
},
"results": [
{
"selector": "opencl:0",
"device": {
"backend": "opencl",
"device_type": "cpu",
"index": 0,
"platform": "Intel(R) OpenCL",
"name": "Intel(R) Xeon(R) Processor @ 2.10GHz",
"description": "Intel(R) OpenCL, Intel(R) Xeon(R) Processor @ 2.10GHz OpenCL 3.0 (Build 0) [2026.21.7.0.24_160000]",
"selector": "opencl:0"
},
"status": "ok",
"wall_time_s": {
"n": 5,
"min": 0.1950978980000002,
"median": 0.21371404199999233,
"p95": 0.2217757039999924,
"max": 0.22330233599998905,
"mean": 0.20955153699999868,
"stdev": 0.011666928261094132
},
"samples_s": [
0.215669,
0.213714,
0.223302,
0.199974,
0.195098
]
}
]
}