summaryrefslogtreecommitdiffstats
path: root/ipc/ipdl/test/cxx/TestLatency.cpp
diff options
context:
space:
mode:
Diffstat (limited to '')
-rw-r--r--ipc/ipdl/test/cxx/TestLatency.cpp210
1 files changed, 210 insertions, 0 deletions
diff --git a/ipc/ipdl/test/cxx/TestLatency.cpp b/ipc/ipdl/test/cxx/TestLatency.cpp
new file mode 100644
index 0000000000..f88d8ea644
--- /dev/null
+++ b/ipc/ipdl/test/cxx/TestLatency.cpp
@@ -0,0 +1,210 @@
+#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