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#include <algorithm>
#include <cmath>
#include <utility>
#include <vector>
#include <gtest/gtest.h>
#include <c10/util/ApproximateClock.h>
#include <c10/util/irange.h>
#include <torch/csrc/profiler/containers.h>
#include <torch/csrc/profiler/util.h>
TEST(ProfilerTest, AppendOnlyList) {
const int n = 4096;
torch::profiler::impl::AppendOnlyList<int, 1024> list;
for (const auto i : c10::irange(n)) {
list.emplace_back(i);
ASSERT_EQ(list.size(), i + 1);
}
int expected = 0;
for (const auto i : list) {
ASSERT_EQ(i, expected++);
}
ASSERT_EQ(expected, n);
list.clear();
ASSERT_EQ(list.size(), 0);
}
TEST(ProfilerTest, AppendOnlyList_ref) {
const int n = 512;
torch::profiler::impl::AppendOnlyList<std::pair<int, int>, 64> list;
std::vector<std::pair<int, int>*> refs;
for (const auto _ : c10::irange(n)) {
refs.push_back(list.emplace_back());
}
for (const auto i : c10::irange(n)) {
*refs.at(i) = {i, 0};
}
int expected = 0;
for (const auto& i : list) {
ASSERT_EQ(i.first, expected++);
}
}
// Test that we can convert TSC measurements back to wall clock time.
TEST(ProfilerTest, clock_converter) {
const int n = 10001;
c10::ApproximateClockToUnixTimeConverter converter;
std::vector<
c10::ApproximateClockToUnixTimeConverter::UnixAndApproximateTimePair>
pairs;
for (const auto i : c10::irange(n)) {
pairs.push_back(c10::ApproximateClockToUnixTimeConverter::measurePair());
}
auto count_to_ns = converter.makeConverter();
std::vector<int64_t> deltas;
for (const auto& i : pairs) {
deltas.push_back(i.t_ - count_to_ns(i.approx_t_));
}
std::sort(deltas.begin(), deltas.end());
// In general it's not a good idea to put clocks in unit tests as it leads
// to flakiness. We mitigate this by:
// 1) Testing the clock itself. While the time to complete a task may
// vary, two clocks measuring the same time should be much more
// consistent.
// 2) Only testing the interquartile range. Context switches between
// calls to the two timers do occur and can result in hundreds of
// nanoseconds of noise, but such switches are only a few percent
// of cases.
// 3) We're willing to accept a somewhat large bias which can emerge from
// differences in the cost of calling each clock.
EXPECT_LT(std::abs(deltas[n / 2]), 200);
EXPECT_LT(deltas[n * 3 / 4] - deltas[n / 4], 50);
}
TEST(ProfilerTest, soft_assert) {
EXPECT_TRUE(SOFT_ASSERT(true));
torch::profiler::impl::setSoftAssertRaises(true);
EXPECT_ANY_THROW(SOFT_ASSERT(false));
torch::profiler::impl::setSoftAssertRaises(false);
EXPECT_NO_THROW(SOFT_ASSERT(false));
// Reset soft assert behavior to default
torch::profiler::impl::setSoftAssertRaises(std::nullopt);
EXPECT_NO_THROW(SOFT_ASSERT(false));
}
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