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ircd::prof::psi: Additional state relative to last refresh.

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This commit is contained in:
Jason Volk 2020-05-09 15:52:30 -07:00
parent 19f4917d9f
commit 32192bf439
3 changed files with 61 additions and 40 deletions
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9
include/ircd/prof/psi.h
View file

@ -42,8 +42,15 @@ struct ircd::prof::psi::metric
float pct;
};
struct
{
microseconds total; // stall value direct from system
microseconds relative; // value since last sample only
microseconds window; // duration since last sample
float pct; // % of stall time since last sample
}
stall;
std::array<struct avg, 3> avg;
microseconds stall;
};
struct ircd::prof::psi::file

11
ircd/prof_linux.cc
View file

@ -377,7 +377,7 @@ noexcept try
};
size_t i(0);
tokens(vals, ' ', [&metric, &i] // Read each key=value pair
tokens(vals, ' ', [&file, &metric, &i] // Read each key=value pair
(const string_view &key_val)
{
const auto &[key, val]
@ -387,7 +387,14 @@ noexcept try
if(key == "total")
{
metric.stall = lex_cast<microseconds>(val);
const auto total(lex_cast<microseconds>(val));
metric.stall.relative = total - metric.stall.total;
metric.stall.window = duration_cast<microseconds>(now<system_point>() - file.sampled);
metric.stall.pct = metric.stall.window.count()?
metric.stall.relative.count() / double(metric.stall.window.count()):
0.0;
metric.stall.pct *= 100;
metric.stall.total = total;
return;
}
else if(startswith(key, "avg") && i < metric.avg.size())

81
modules/console.cc
View file

@ -1235,47 +1235,54 @@ console_cmd__prof__psi(opt &out, const string_view &line)
if(!refresh(file))
return;
char pbuf[48];
out
<< std::left << name
<< " some stall "
<< pretty(pbuf, file.some.stall)
<< " ("
<< file.some.stall.count()
<< ')'
<< std::endl
;
for(size_t i(0); i < file.some.avg.size(); i++)
const auto show_metric{[&out, &name]
(const auto &metric, const string_view &metric_name)
{
char pbuf[48];
out
<< std::left << name
<< " some "
<< std::right << std::setw(3) << file.some.avg.at(i).window.count()
<< "s "
<< std::right << std::setw(4) << file.some.avg.at(i).pct << '%'
<< std::endl
;
<< std::left << std::setw(6) << name
<< ' '
<< metric_name << " stall window "
<< pretty(pbuf, metric.stall.window)
<< " ("
<< metric.stall.window.count()
<< ')'
<< std::endl;
out
<< std::endl
<< std::left << name
<< " full stall "
<< pretty(pbuf, file.full.stall)
<< " ("
<< file.full.stall.count()
<< ')'
<< std::endl
;
for(size_t i(0); i < file.full.avg.size(); i++)
out
<< std::left << name
<< " full "
<< std::right << std::setw(3) << file.full.avg.at(i).window.count()
<< "s "
<< std::right << std::setw(4) << file.full.avg.at(i).pct << '%'
<< std::endl
;
<< std::left << std::setw(6) << name
<< ' '
<< metric_name << " stall last "
<< pretty(pbuf, metric.stall.relative)
<< " ("
<< metric.stall.relative.count()
<< ") "
<< metric.stall.pct << '%'
<< std::endl;
out << std::endl;
out
<< std::left << std::setw(6) << name
<< ' '
<< metric_name << " stall total "
<< pretty(pbuf, metric.stall.total)
<< " ("
<< metric.stall.total.count()
<< ')'
<< std::endl;
for(size_t i(0); i < metric.avg.size(); i++)
out
<< std::left << std::setw(6) << name
<< ' '
<< metric_name << " "
<< std::right << std::setw(4) << metric.avg.at(i).window.count()
<< "s "
<< std::right << metric.avg.at(i).pct << '%'
<< std::endl;
}};
show_metric(file.some, "some");
show_metric(file.full, "full");
}};
const params param{line, " ",