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#include "TestLatency.h"
#include "IPDLUnitTests.h" // fail etc.
// A ping/pong trial takes O(100us) or more, so if we don't have 10us
// resolution or better, the results will not be terribly useful
static const double kTimingResolutionCutoff = 0.00001; // 10us
namespace mozilla {
namespace _ipdltest {
//-----------------------------------------------------------------------------
// parent
TestLatencyParent::TestLatencyParent()
: mStart(),
mPPTimeTotal(),
mPP5TimeTotal(),
mRpcTimeTotal(),
mPPTrialsToGo(NR_TRIALS),
mPP5TrialsToGo(NR_TRIALS),
mNumChildProcessedCompressedSpams(0),
mWhichPong5(0) {
MOZ_COUNT_CTOR(TestLatencyParent);
}
TestLatencyParent::~TestLatencyParent() { MOZ_COUNT_DTOR(TestLatencyParent); }
void TestLatencyParent::Main() {
TimeDuration resolution = TimeDuration::Resolution();
if (resolution.ToSeconds() > kTimingResolutionCutoff) {
puts(" (skipping TestLatency, timing resolution is too poor)");
Close();
return;
}
printf(" timing resolution: %g seconds\n", resolution.ToSecondsSigDigits());
if (mozilla::ipc::LoggingEnabled())
MOZ_CRASH(
"you really don't want to log all IPC messages during this test, trust "
"me");
PingPongTrial();
}
void TestLatencyParent::PingPongTrial() {
mStart = TimeStamp::Now();
if (!SendPing()) fail("sending Ping()");
}
void TestLatencyParent::Ping5Pong5Trial() {
mStart = TimeStamp::Now();
if (!SendPing5() || !SendPing5() || !SendPing5() || !SendPing5() ||
!SendPing5())
fail("sending Ping5()");
}
mozilla::ipc::IPCResult TestLatencyParent::RecvPong() {
TimeDuration thisTrial = (TimeStamp::Now() - mStart);
mPPTimeTotal += thisTrial;
if (0 == (mPPTrialsToGo % 1000))
printf(" PP trial %d: %g\n", mPPTrialsToGo,
thisTrial.ToSecondsSigDigits());
if (--mPPTrialsToGo > 0)
PingPongTrial();
else
Ping5Pong5Trial();
return IPC_OK();
}
mozilla::ipc::IPCResult TestLatencyParent::RecvPong5() {
++mWhichPong5;
if (mWhichPong5 < 5) {
return IPC_OK();
}
mWhichPong5 = 0;
TimeDuration thisTrial = (TimeStamp::Now() - mStart);
mPP5TimeTotal += thisTrial;
if (0 == (mPP5TrialsToGo % 1000))
printf(" PP5 trial %d: %g\n", mPP5TrialsToGo,
thisTrial.ToSecondsSigDigits());
if (0 < --mPP5TrialsToGo)
Ping5Pong5Trial();
else
RpcTrials();
return IPC_OK();
}
void TestLatencyParent::RpcTrials() {
TimeStamp start = TimeStamp::Now();
for (int i = 0; i < NR_TRIALS; ++i) {
if (!CallRpc()) fail("can't call Rpc()");
if (0 == (i % 1000)) printf(" Rpc trial %d\n", i);
}
mRpcTimeTotal = (TimeStamp::Now() - start);
SpamTrial();
}
void TestLatencyParent::SpamTrial() {
TimeStamp start = TimeStamp::Now();
for (int i = 0; i < NR_SPAMS - 1; ++i) {
if (!SendSpam()) fail("sending Spam()");
if (0 == (i % 10000)) printf(" Spam trial %d\n", i);
}
// Synchronize with the child process to ensure all messages have
// been processed. This adds the overhead of a reply message from
// child-->here, but should be insignificant compared to >>
// NR_SPAMS.
if (!CallSynchro()) fail("calling Synchro()");
mSpamTimeTotal = (TimeStamp::Now() - start);
CompressedSpamTrial();
}
void TestLatencyParent::CompressedSpamTrial() {
for (int i = 0; i < NR_SPAMS; ++i) {
if (!SendCompressedSpam(i + 1)) fail("sending CompressedSpam()");
if (0 == (i % 10000)) printf(" CompressedSpam trial %d\n", i);
}
uint32_t lastSeqno;
if (!CallSynchro2(&lastSeqno, &mNumChildProcessedCompressedSpams))
fail("calling Synchro2()");
if (lastSeqno != NR_SPAMS)
fail("last seqno was %u, expected %u", lastSeqno, NR_SPAMS);
// NB: since this is testing an optimization, it's somewhat bogus.
// Need to make a warning if it actually intermittently fails in
// practice, which is doubtful.
if (!(mNumChildProcessedCompressedSpams < NR_SPAMS))
fail("Didn't compress any messages?");
Exit();
}
void TestLatencyParent::Exit() { Close(); }
//-----------------------------------------------------------------------------
// child
TestLatencyChild::TestLatencyChild()
: mLastSeqno(0), mNumProcessedCompressedSpams(0), mWhichPing5(0) {
MOZ_COUNT_CTOR(TestLatencyChild);
}
TestLatencyChild::~TestLatencyChild() { MOZ_COUNT_DTOR(TestLatencyChild); }
mozilla::ipc::IPCResult TestLatencyChild::RecvPing() {
SendPong();
return IPC_OK();
}
mozilla::ipc::IPCResult TestLatencyChild::RecvPing5() {
++mWhichPing5;
if (mWhichPing5 < 5) {
return IPC_OK();
}
mWhichPing5 = 0;
if (!SendPong5() || !SendPong5() || !SendPong5() || !SendPong5() ||
!SendPong5())
fail("sending Pong5()");
return IPC_OK();
}
mozilla::ipc::IPCResult TestLatencyChild::AnswerRpc() { return IPC_OK(); }
mozilla::ipc::IPCResult TestLatencyChild::RecvSpam() {
// no-op
return IPC_OK();
}
mozilla::ipc::IPCResult TestLatencyChild::AnswerSynchro() { return IPC_OK(); }
mozilla::ipc::IPCResult TestLatencyChild::RecvCompressedSpam(
const uint32_t& seqno) {
if (seqno <= mLastSeqno)
fail("compressed seqnos must monotonically increase");
mLastSeqno = seqno;
++mNumProcessedCompressedSpams;
return IPC_OK();
}
mozilla::ipc::IPCResult TestLatencyChild::AnswerSynchro2(
uint32_t* lastSeqno, uint32_t* numMessagesDispatched) {
*lastSeqno = mLastSeqno;
*numMessagesDispatched = mNumProcessedCompressedSpams;
return IPC_OK();
}
} // namespace _ipdltest
} // namespace mozilla
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