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modules/console: Minor cleanup; more fences for latency test.

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This commit is contained in:
Jason Volk 2019-09-20 14:03:41 -07:00
parent 71a59d20e0
commit 3de5381d61
1 changed files with 31 additions and 42 deletions
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73
modules/console.cc
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@ -1376,36 +1376,25 @@ console_cmd__ios__latency(opt &out, const string_view &line)
// control
{
__sync_synchronize();
asm volatile ("lfence" :::);
asm volatile ("lfence");
started = prof::cycles();
asm volatile ("lfence" :::);
executed = prof::cycles();
asm volatile ("lfence" :::);
returned = prof::cycles();
asm volatile ("lfence" :::);
}
asm volatile ("lfence");
out
<< "bare send: " << (executed - started) << std::endl
<< "bare recv: " << (returned - executed) << std::endl
<< "bare rtt: " << (returned - started) << std::endl
<< std::endl;
// control
{
__sync_synchronize();
started = prof::x86::rdtscp();
asm volatile ("lfence" :::);
executed = prof::x86::rdtscp();
asm volatile ("lfence" :::);
returned = prof::x86::rdtscp();
asm volatile ("lfence" :::);
asm volatile ("lfence");
executed = prof::cycles();
asm volatile ("lfence");
__sync_synchronize();
asm volatile ("lfence");
returned = prof::cycles();
asm volatile ("lfence");
}
out
<< "tscp send: " << (executed - started) << std::endl
<< "tscp recv: " << (returned - executed) << std::endl
<< "tscp rtt: " << (returned - started) << std::endl
<< "tsc send: " << (executed - started) << std::endl
<< "tsc recv: " << (returned - executed) << std::endl
<< "tsc rtt: " << (returned - started) << std::endl
<< std::endl;
//
@ -1414,22 +1403,22 @@ console_cmd__ios__latency(opt &out, const string_view &line)
{
__sync_synchronize();
asm volatile ("lfence" :::);
asm volatile ("lfence");
started = prof::cycles();
asm volatile ("lfence" :::);
asm volatile ("lfence");
ios::dispatch(ios::synchronous, [&executed]
{
__sync_synchronize();
asm volatile ("lfence" :::);
asm volatile ("lfence");
executed = prof::cycles();
asm volatile ("lfence" :::);
asm volatile ("lfence");
});
__sync_synchronize();
asm volatile ("lfence" :::);
asm volatile ("lfence");
returned = prof::cycles();
asm volatile ("lfence" :::);
asm volatile ("lfence");
}
out
@ -1444,22 +1433,22 @@ console_cmd__ios__latency(opt &out, const string_view &line)
{
__sync_synchronize();
asm volatile ("lfence" :::);
asm volatile ("lfence");
started = prof::cycles();
asm volatile ("lfence" :::);
asm volatile ("lfence");
ios::defer(ios::synchronous, [&executed]
{
__sync_synchronize();
asm volatile ("lfence" :::);
asm volatile ("lfence");
executed = prof::cycles();
asm volatile ("lfence" :::);
asm volatile ("lfence");
});
__sync_synchronize();
asm volatile ("lfence" :::);
asm volatile ("lfence");
returned = prof::cycles();
asm volatile ("lfence" :::);
asm volatile ("lfence");
}
out
@ -1474,22 +1463,22 @@ console_cmd__ios__latency(opt &out, const string_view &line)
{
__sync_synchronize();
asm volatile ("lfence" :::);
asm volatile ("lfence");
started = prof::cycles();
asm volatile ("lfence" :::);
asm volatile ("lfence");
ios::post(ios::synchronous, [&executed]
{
__sync_synchronize();
asm volatile ("lfence" :::);
asm volatile ("lfence");
executed = prof::cycles();
asm volatile ("lfence" :::);
asm volatile ("lfence");
});
__sync_synchronize();
asm volatile ("lfence" :::);
asm volatile ("lfence");
returned = prof::cycles();
asm volatile ("lfence" :::);
asm volatile ("lfence");
}
out