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ircd::json: Add stats items counting calls and cycles on input and output.

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This commit is contained in:
Jason Volk 2020-06-24 08:59:26 -07:00
parent c99ae124f4
commit d456a42cdd
2 changed files with 17 additions and 0 deletions
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10
include/ircd/json/util.h
View file

@ -35,8 +35,18 @@ namespace ircd::json
bool valid(const string_view &, std::nothrow_t) noexcept;
void valid(const string_view &);
std::string why(const string_view &);
struct stats extern stats;
}
/// Statistics counter access; unfortunately these cannot participate as
/// ircd::stats items right now.
struct ircd::json::stats
{
uint64_t print_calls {0}, print_cycles {0};
uint64_t parse_calls {0}, parse_cycles {0};
};
/// Alternative to `json::strung` which uses a fixed array rather than an
/// allocated string as the target.
template<size_t SIZE>

7
ircd/json.cc
View file

@ -19,6 +19,9 @@ namespace ircd::json
}
#pragma GCC visibility pop
decltype(ircd::json::stats)
ircd::json::stats;
#pragma GCC visibility push(internal)
BOOST_FUSION_ADAPT_STRUCT
(
@ -489,6 +492,8 @@ ircd::json::printer::operator()(mutable_buffer &out,
attr&&... a)
const
{
++stats.print_calls;
const prof::scope_cycles timer{stats.print_cycles};
if(unlikely(!ircd::generate(out, std::forward<gen>(g), std::forward<attr>(a)...)))
throw print_error
{
@ -542,6 +547,8 @@ ircd::json::parser::operator()(const char *&start,
attr&&...a)
const
{
++stats.parse_calls;
const prof::scope_cycles timer{stats.parse_cycles};
return ircd::parse<parse_error>(start, stop, std::forward<gen>(g), std::forward<attr>(a)...);
}