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ircd::ctx: Measure and report epoch span for slice_usage_warning.

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This commit is contained in:
Jason Volk 2020-05-24 16:43:56 -07:00
parent f070e3b706
commit ac42d4df13
2 changed files with 16 additions and 1 deletions
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1
include/ircd/ctx/slice_usage_warning.h
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@ -22,6 +22,7 @@ struct ircd::ctx::this_ctx::slice_usage_warning
{
string_view fmt;
va_rtti ap;
ulong epoch;
ulong start;
template<class... args>

16
ircd/ctx.cc
View file

@ -917,6 +917,12 @@ ircd::ctx::this_ctx::slice_usage_warning::slice_usage_warning(const string_view
{
std::move(ap)
}
,epoch
{
current?
ircd::ctx::epoch(cur()):
ircd::ctx::epoch()
}
,start
{
// Set the start value to the total number of cycles accrued by this
@ -956,6 +962,13 @@ noexcept
if(likely(!prof::slice_exceeded_warning(total)))
return;
const auto span
{
current?
ircd::ctx::epoch(cur()) - this->epoch:
ircd::ctx::epoch() - this->epoch
};
thread_local char buf[256];
const string_view reason{fmt::vsprintf
{
@ -965,12 +978,13 @@ noexcept
const ulong &threshold{prof::settings::slice_warning};
log::dwarning
{
log, "[%s] context id:%lu watchdog :timeslice excessive; lim:%lu this:%lu pct:%.2lf :%s",
log, "[%s] context id:%lu watchdog :timeslice excessive; lim:%lu this:%lu pct:%.2lf span:%lu :%s",
current? name(cur()) : ""_sv,
current? id(cur()) : 0,
threshold,
total,
(double(total) / double(threshold)) * 100.0,
span,
reason
};
}