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[GPU] use stable seed hash algorithm for different platforms #36018

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[GPU] use stable seed hash algorithm for different platforms #36018

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2c04793
use stable hash algorithm for random generator
yuanxion May 21, 2026
d165adb
Potential fix for pull request finding
yuanxion May 21, 2026
62a2c61
add testcase
yuanxion May 21, 2026
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17 changes: 15 additions & 2 deletions src/plugins/intel_gpu/tests/common/random_generator.hpp
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Original file line number Diff line number Diff line change
Expand Up @@ -4,15 +4,29 @@

#pragma once

#include <cstdint>
#include <random>
#include <set>
#include <string>
#include <string_view>
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#include <vector>

#define GET_SUITE_NAME (std::string(::testing::UnitTest::GetInstance()->current_test_info()->test_suite_name()) + \
std::string(::testing::UnitTest::GetInstance()->current_test_info()->name()))

namespace tests {
static const uint32_t DEFAULT_SEED = 0;

// Use a deterministic FNV-1a hash instead of std::hash algorithm
inline uint32_t stable_string_seed(std::string_view seed) {
uint32_t hash = 2166136261u;
for (unsigned char ch : seed) {
hash ^= ch;
hash *= 16777619u;
}
return hash;
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}

class random_generator {
public:
random_generator() = default;
Expand All @@ -26,8 +40,7 @@ class random_generator {
}

void set_seed(const std::string& seed) {
auto seed_hash = std::hash<std::string>{}(seed);
set_seed(static_cast<uint32_t>(seed_hash));
set_seed(stable_string_seed(seed));
}

void set_seed(const uint32_t seed) {
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8 changes: 8 additions & 0 deletions src/plugins/intel_gpu/tests/unit/module_tests/graph_manipulation_gpu_test.cpp
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Expand Up @@ -25,6 +25,14 @@
using namespace cldnn;
using namespace ::tests;

TEST(random_generator, stable_string_seed_regression) {
EXPECT_EQ(stable_string_seed("stable_seed_smoke"), 2193642732u);
EXPECT_EQ(stable_string_seed("fully_connected_gpu_testcompressed_int4_scale"), 3127160893u);
EXPECT_EQ(stable_string_seed("fully_connected_gpu_testcompressed_int4_scale_dynamic"), 2450867795u);
EXPECT_NE(stable_string_seed("stable_seed_smoke"),
stable_string_seed("stable_seed_smoke_cached"));
}

/* Basic test to show how the program can be build and run within internal tests
in similar way as it is done in tests utilizing clDNN API */
TEST(basic, test1) {
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