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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include <vespa/vespalib/testkit/test_kit.h>
#include <vespa/fnet/packetqueue.h>
#include <vespa/fnet/packet.h>
#include <mutex>
#include <chrono>
class MyPacket : public FNET_Packet
{
public:
uint32_t GetPCODE() override { return 0; }
uint32_t GetLength() override { return 0; }
void Encode(FNET_DataBuffer *) override {}
bool Decode(FNET_DataBuffer *, uint32_t) override { return true; }
};
TEST("drain packets") {
using clock = std::chrono::steady_clock;
using ms_double = std::chrono::duration<double, std::milli>;
clock::time_point start;
ms_double ms;
std::mutex lock;
FNET_PacketQueue q1(512);
FNET_PacketQueue q2(512);
FNET_PacketQueue q3(512);
int i;
// create dummy packets
for (i = 0; i < 500; i++) {
q1.QueuePacket_NoLock(new MyPacket(), FNET_Context());
}
// drain packets directly with single lock interval
start = clock::now();
for (i = 0; i < 10000; i++) {
FNET_Packet *packet;
FNET_Context context;
{
std::lock_guard<std::mutex> guard(lock);
while (!q1.IsEmpty_NoLock()) {
packet = q1.DequeuePacket_NoLock(&context);
q3.QueuePacket_NoLock(packet, context);
}
}
//------------------------
{
std::lock_guard<std::mutex> guard(lock);
while (!q3.IsEmpty_NoLock()) {
packet = q3.DequeuePacket_NoLock(&context);
q1.QueuePacket_NoLock(packet, context);
}
}
}
ms = (clock::now() - start);
fprintf(stderr, "direct, single lock interval (10M packets): %1.2f ms\n",
ms.count());
// flush packets, then move without lock
start = clock::now();
for (i = 0; i < 10000; i++) {
FNET_Packet *packet;
FNET_Context context;
{
std::lock_guard<std::mutex> guard(lock);
q1.FlushPackets_NoLock(&q2);
}
while (!q2.IsEmpty_NoLock()) {
packet = q2.DequeuePacket_NoLock(&context);
q3.QueuePacket_NoLock(packet, context);
}
//------------------------
{
std::lock_guard<std::mutex> guard(lock);
q3.FlushPackets_NoLock(&q2);
}
while (!q2.IsEmpty_NoLock()) {
packet = q2.DequeuePacket_NoLock(&context);
q1.QueuePacket_NoLock(packet, context);
}
}
ms = (clock::now() - start);
fprintf(stderr, "indirect (10M packets): %1.2f ms\n", ms.count());
// drain packets directly with multiple lock intervals
start = clock::now();
for (i = 0; i < 10000; i++) {
FNET_Packet *packet;
FNET_Context context;
while ((packet = q1.DequeuePacket(0, &context)) != nullptr) {
q3.QueuePacket_NoLock(packet, context);
}
//------------------------
while ((packet = q3.DequeuePacket(0, &context)) != nullptr) {
q1.QueuePacket_NoLock(packet, context);
}
}
ms = (clock::now() - start);
fprintf(stderr, "direct, multiple lock intervals (10M packets): %1.2f ms\n",
ms.count());
EXPECT_TRUE(q1.GetPacketCnt_NoLock() == 500 &&
q2.GetPacketCnt_NoLock() == 0 &&
q3.GetPacketCnt_NoLock() == 0);
}
TEST_MAIN() { TEST_RUN_ALL(); }
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