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ircd::ctx::prof: Convert the settings into conf items.

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This commit is contained in:
Jason Volk 2018-11-14 17:35:23 -08:00
parent 895768837f
commit 48a15e026b
2 changed files with 55 additions and 22 deletions
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15
include/ircd/ctx/prof.h
View file

@ -30,7 +30,6 @@
namespace ircd::ctx::prof
{
enum class event;
struct settings extern settings;
// lowlevel
ulong rdtsc();
@ -60,12 +59,12 @@ enum class ircd::ctx::prof::event
CUR_TERMINATE, // Current context detects termination
};
struct ircd::ctx::prof::settings
namespace ircd::ctx::prof::settings
{
double stack_usage_warning; // percentage
double stack_usage_assertion; // percentage
extern conf::item<double> stack_usage_warning; // percentage
extern conf::item<double> stack_usage_assertion; // percentage
ulong slice_warning; // Warn when the yield-to-yield cycles exceeds
ulong slice_interrupt; // Interrupt exception when exceeded (not a signal)
ulong slice_assertion; // abort() when exceeded (not a signal, must yield)
};
extern conf::item<ulong> slice_warning; // Warn when the yield-to-yield cycles exceeds
extern conf::item<ulong> slice_interrupt; // Interrupt exception when exceeded (not a signal)
extern conf::item<ulong> slice_assertion; // abort() when exceeded (not a signal, must yield)
}

62
ircd/ctx.cc
View file

@ -747,14 +747,14 @@ noexcept
ircd::ctx::this_ctx::stack_usage_assertion::stack_usage_assertion()
{
const auto stack_usage(stack_at_here());
assert(stack_usage < cur().stack.max * prof::settings.stack_usage_assertion);
assert(stack_usage < cur().stack.max * double(prof::settings::stack_usage_assertion));
}
ircd::ctx::this_ctx::stack_usage_assertion::~stack_usage_assertion()
noexcept
{
const auto stack_usage(stack_at_here());
assert(stack_usage < cur().stack.max * prof::settings.stack_usage_assertion);
assert(stack_usage < cur().stack.max * double(prof::settings::stack_usage_assertion));
}
#endif // NDEBUG
@ -1197,15 +1197,44 @@ namespace ircd::ctx::prof
void handle_cur_enter();
}
struct ircd::ctx::prof::settings
ircd::ctx::prof::settings
// stack_usage_warning at 1/3 engineering tolerance
decltype(ircd::ctx::prof::settings::stack_usage_warning)
ircd::ctx::prof::settings::stack_usage_warning
{
0.33, // stack_usage_warning at 1/3 engineering tolerance
0.50, // stack_usage_assertion at 1/2 engineering tolerance
{ "name", "ircd.ctx.prof.stack_usage_warning" },
{ "default", 0.33 },
};
280 * 1000000UL, // slice_warning after this number of tsc ticks...
0UL, // slice_interrupt unused until project more mature...
0UL, // slice_assertion unused; warning sufficient for now...
// stack_usage_assertion at 1/2 engineering tolerance
decltype(ircd::ctx::prof::settings::stack_usage_assertion)
ircd::ctx::prof::settings::stack_usage_assertion
{
{ "name", "ircd.ctx.prof.stack_usage_assertion" },
{ "default", 0.50 },
};
// slice_warning after this number of tsc ticks...
decltype(ircd::ctx::prof::settings::slice_warning)
ircd::ctx::prof::settings::slice_warning
{
{ "name", "ircd.ctx.prof.slice_warning" },
{ "default", 280 * 1000000L },
};
// slice_interrupt after this number of tsc ticks...
decltype(ircd::ctx::prof::settings::slice_interrupt)
ircd::ctx::prof::settings::slice_interrupt
{
{ "name", "ircd.ctx.prof.slice_interrupt" },
{ "default", 0L },
};
// slice_assertion after this number of tsc ticks...
decltype(ircd::ctx::prof::settings::slice_assertion)
ircd::ctx::prof::settings::slice_assertion
{
{ "name", "ircd.ctx.prof.slice_assertion" },
{ "default", 0L },
};
#ifdef RB_DEBUG
@ -1289,7 +1318,8 @@ ircd::ctx::prof::check_slice()
c.profile.cycles += last_cycles;
_slice_total += last_cycles;
if(unlikely(settings.slice_warning > 0 && last_cycles >= settings.slice_warning))
const ulong &slice_warning(settings::slice_warning);
if(unlikely(slice_warning > 0 && last_cycles >= slice_warning))
log::dwarning
{
"context timeslice exceeded '%s' #%lu total: %lu last: %lu",
@ -1299,9 +1329,11 @@ ircd::ctx::prof::check_slice()
last_cycles
};
assert(settings.slice_assertion == 0 || last_cycles < settings.slice_assertion);
const ulong &slice_assertion(settings::slice_assertion);
assert(slice_assertion == 0 || last_cycles < slice_assertion);
if(unlikely(settings.slice_interrupt > 0 && last_cycles >= settings.slice_interrupt))
const ulong &slice_interrupt(settings::slice_interrupt);
if(unlikely(slice_interrupt > 0 && last_cycles >= slice_interrupt))
throw interrupted
{
"context '%s' #%lu watchdog interrupt (total: %lu last: %lu)",
@ -1320,7 +1352,8 @@ ircd::ctx::prof::check_stack()
const auto &stack_at(stack_at_here());
c.stack.at = stack_at;
if(unlikely(stack_at > stack_max * settings.stack_usage_warning))
const double &stack_usage_assertion(settings::stack_usage_assertion);
if(unlikely(stack_at > stack_max * stack_usage_assertion))
{
log::dwarning
{
@ -1331,7 +1364,8 @@ ircd::ctx::prof::check_stack()
c.stack.max
};
assert(stack_at < c.stack.max * settings.stack_usage_assertion);
const double &stack_usage_assertion(settings::stack_usage_assertion);
assert(stack_at < c.stack.max * double(settings::stack_usage_assertion));
}
}