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// ---
// Author: Sanjay Ghemawat
//
// MallocExtension::MarkThreadIdle() testing
#include <stdio.h>
#include "config_for_unittests.h"
#include "base/logging.h"
#include <gperftools/malloc_extension.h>
#include "tests/testutil.h" // for RunThread()
// Helper routine to do lots of allocations
static void TestAllocation() {
static const int kNum = 100;
void* ptr[kNum];
for (int size = 8; size <= 65536; size*=2) {
for (int i = 0; i < kNum; i++) {
ptr[i] = malloc(size);
}
for (int i = 0; i < kNum; i++) {
free(ptr[i]);
}
}
}
// Routine that does a bunch of MarkThreadIdle() calls in sequence
// without any intervening allocations
static void MultipleIdleCalls() {
for (int i = 0; i < 4; i++) {
MallocExtension::instance()->MarkThreadIdle();
}
}
// Routine that does a bunch of MarkThreadIdle() calls in sequence
// with intervening allocations
static void MultipleIdleNonIdlePhases() {
for (int i = 0; i < 4; i++) {
TestAllocation();
MallocExtension::instance()->MarkThreadIdle();
}
}
// Get current thread cache usage
static size_t GetTotalThreadCacheSize() {
size_t result;
CHECK(MallocExtension::instance()->GetNumericProperty(
"tcmalloc.current_total_thread_cache_bytes",
&result));
return result;
}
// Check that MarkThreadIdle() actually reduces the amount
// of per-thread memory.
static void TestIdleUsage() {
const size_t original = GetTotalThreadCacheSize();
TestAllocation();
const size_t post_allocation = GetTotalThreadCacheSize();
CHECK_GT(post_allocation, original);
MallocExtension::instance()->MarkThreadIdle();
const size_t post_idle = GetTotalThreadCacheSize();
CHECK_LE(post_idle, original);
// Log after testing because logging can allocate heap memory.
VLOG(0, "Original usage: %"PRIuS"\n", original);
VLOG(0, "Post allocation: %"PRIuS"\n", post_allocation);
VLOG(0, "Post idle: %"PRIuS"\n", post_idle);
}
int main(int argc, char** argv) {
RunThread(&TestIdleUsage);
RunThread(&TestAllocation);
RunThread(&MultipleIdleCalls);
RunThread(&MultipleIdleNonIdlePhases);
printf("PASS\n");
return 0;
}