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ircd::ctx::prof: Add cycle counter to ticker array.

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This commit is contained in:
Jason Volk 2019-04-12 15:57:34 -07:00
parent 0ce0fe3890
commit 8c68a24e1f
3 changed files with 18 additions and 14 deletions
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4
include/ircd/ctx/prof.h
View file

@ -83,6 +83,7 @@ enum class ircd::ctx::prof::event
CONTINUE, // Current context continuing
INTERRUPT, // Current context detects interruption
TERMINATE, // Current context detects termination
CYCLES, // monotonic counter (rdtsc)
_NUM_
};
@ -90,9 +91,6 @@ enum class ircd::ctx::prof::event
/// structure aggregating any profiling related state for a ctx
struct ircd::ctx::prof::ticker
{
// monotonic counter (rdtsc)
ulong cycles {0};
// monotonic counters for events
std::array<uint64_t, num_of<prof::event>()> event {{0}};
};

22
ircd/ctx.cc
View file

@ -509,7 +509,7 @@ noexcept
const ulong &
ircd::ctx::cycles(const ctx &ctx)
{
return ctx.profile.cycles;
return prof::get(ctx, prof::event::CYCLES);
}
/// Returns the yield count for `ctx`
@ -918,7 +918,7 @@ ircd::ctx::this_ctx::slice_usage_warning::slice_usage_warning(const string_view
!current?
prof::cycles():
~cur().flags & context::SLICE_EXEMPT?
cur().profile.cycles + prof::cur_slice_cycles():
prof::get(cur(), prof::event::CYCLES) + prof::cur_slice_cycles():
0
}
{
@ -941,7 +941,7 @@ noexcept
const auto stop
{
current?
cur().profile.cycles + prof::cur_slice_cycles():
prof::get(cur(), prof::event::CYCLES) + prof::cur_slice_cycles():
prof::cycles()
};
@ -1717,10 +1717,19 @@ ircd::ctx::prof::slice_leave()
auto &c(cur());
assert(_slice_stop >= _slice_start);
const auto last_slice(_slice_stop - _slice_start);
const auto last_slice
{
_slice_stop - _slice_start
};
static constexpr auto pos
{
size_t(prof::event::CYCLES)
};
c.profile.event.at(pos) += last_slice;
_total.event.at(pos) += last_slice;
c.stack.at = stack_at_here();
c.profile.cycles += last_slice;
_total.cycles += last_slice;
}
#ifndef NDEBUG
@ -1903,6 +1912,7 @@ ircd::ctx::prof::reflect(const event &e)
case event::CONTINUE: return "CONTINUE";
case event::INTERRUPT: return "INTERRUPT";
case event::TERMINATE: return "TERMINATE";
case event::CYCLES: return "CYCLES";
case event::_NUM_: break;
}

6
modules/console.cc
View file

@ -1486,10 +1486,6 @@ console_cmd__ctx__prof(opt &out, const string_view &line)
<< " " << t.event.at(uint8_t(event))
<< std::endl;
});
out << std::left << std::setw(15) << std::setfill('_') << "cycles"
<< " " << t.cycles
<< std::endl;
}};
if(!param["id"])
@ -1592,7 +1588,7 @@ console_cmd__ctx__list(opt &out, const string_view &line)
out << " "
<< std::setw(15) << std::right << cycles(ctx);
const long double total_cyc(ctx::prof::get().cycles);
const long double total_cyc(ctx::prof::get(ctx, ctx::prof::event::CYCLES));
const auto tsc_pct
{
total_cyc > 0.0? (cycles(ctx) / total_cyc) : 0.0L