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-rw-r--r--tests/arena.cu108
1 files changed, 0 insertions, 108 deletions
diff --git a/tests/arena.cu b/tests/arena.cu
deleted file mode 100644
index f7a4ddc..0000000
--- a/tests/arena.cu
+++ /dev/null
@@ -1,108 +0,0 @@
-#include <iostream>
-
-#include "../headers/arena.cuh"
-
-
-using namespace cleveldb;
-
-#include <cstdint>
-
-
-// A very simple random number generator. Not especially good at
-// generating truly random bits, but good enough for our needs in this
-// package.
-class Random {
-private:
- uint32_t seed_;
-
-public:
- explicit Random(uint32_t s) : seed_(s & 0x7fffffffu) {
- // Avoid bad seeds.
- if (seed_ == 0 || seed_ == 2147483647L) {
- seed_ = 1;
- }
- }
- uint32_t Next() {
- static const uint32_t M = 2147483647L; // 2^31-1
- static const uint64_t A = 16807; // bits 14, 8, 7, 5, 2, 1, 0
- // We are computing
- // seed_ = (seed_ * A) % M, where M = 2^31-1
- //
- // seed_ must not be zero or M, or else all subsequent computed values
- // will be zero or M respectively. For all other values, seed_ will end
- // up cycling through every number in [1,M-1]
- uint64_t product = seed_ * A;
-
- // Compute (product % M) using the fact that ((x << 31) % M) == x.
- seed_ = static_cast<uint32_t>((product >> 31) + (product & M));
- // The first reduction may overflow by 1 bit, so we may need to
- // repeat. mod == M is not possible; using > allows the faster
- // sign-bit-based test.
- if (seed_ > M) {
- seed_ -= M;
- }
- return seed_;
- }
- // Returns a uniformly distributed value in the range [0..n-1]
- // REQUIRES: n > 0
- uint32_t Uniform(int n) { return Next() % n; }
-
- // Randomly returns true ~"1/n" of the time, and false otherwise.
- // REQUIRES: n > 0
- bool OneIn(int n) { return (Next() % n) == 0; }
-
- // Skewed: pick "base" uniformly from range [0,max_log] and then
- // return "base" random bits. The effect is to pick a number in the
- // range [0,2^max_log-1] with exponential bias towards smaller numbers.
- uint32_t Skewed(int max_log) { return Uniform(1 << Uniform(max_log + 1)); }
-};
-
-
-
-int main() {
- std::vector<std::pair<size_t, char*>> allocated;
- Arena arena;
- const int N = 100000;
- size_t bytes = 0;
- Random rnd(301);
- for (int i = 0; i < N; i++) {
- size_t s;
- if (i % (N / 10) == 0) {
- s = i;
- } else {
- s = rnd.OneIn(4000)
- ? rnd.Uniform(6000)
- : (rnd.OneIn(10) ? rnd.Uniform(100) : rnd.Uniform(20));
- }
- if (s == 0) {
- // Our arena disallows size 0 allocations.
- s = 1;
- }
- char* r;
- if (rnd.OneIn(10)) {
- r = arena.AllocateAligned(s);
- } else {
- r = arena.Allocate(s);
- }
-
- for (size_t b = 0; b < s; b++) {
- // Fill the "i"th allocation with a known bit pattern
- r[b] = i % 256;
- }
- bytes += s;
- allocated.push_back(std::make_pair(s, r));
- assert(arena.MemoryUsage() >= bytes);
- if (i > N / 10) {
- assert(arena.MemoryUsage() <= bytes * 1.10);
- }
- }
- for (size_t i = 0; i < allocated.size(); i++) {
- size_t num_bytes = allocated[i].first;
- const char* p = allocated[i].second;
- for (size_t b = 0; b < num_bytes; b++) {
- // Check the "i"th allocation for the known bit pattern
- assert((int(p[b]) & 0xff) == (i % 256));
- }
- }
- return 0;
-}