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Support time -v for detailed time output

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This breaks down the usage into fish vs external processes.
This commit is contained in:
Mahmoud Al-Qudsi 2019-12-18 20:09:08 -06:00
parent 1ed5e7e478
commit be37656067
1 changed files with 77 additions and 24 deletions
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101
src/builtin_time.cpp
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@ -16,6 +16,8 @@
#include "wgetopt.h"
#include "wutil.h" // IWYU pragma: keep
#include <algorithm>
#include <string.h>
#include <sys/types.h>
#include <sys/time.h>
#include <sys/resource.h>
@ -44,6 +46,14 @@ static uint64_t micros(struct timespec t) {
return (static_cast<uint64_t>(t.tv_nsec) / 1E3 + static_cast<uint64_t>(t.tv_sec * 1E6));
};
// Linux makes available CLOCK_MONOTONIC_RAW, which is monotonic even in the presence of NTP
// adjustments.
#ifdef CLOCK_MONOTONIC_RAW
#define CLOCK_SRC CLOCK_MONOTONIC_RAW
#else
#define CLOCK_SRC CLOCK_MONOTONIC
#endif
/// Implementation of time builtin.
int builtin_time(parser_t &parser, io_streams_t &streams, wchar_t **argv) {
int argc = builtin_count_args(argv);
@ -78,7 +88,7 @@ int builtin_time(parser_t &parser, io_streams_t &streams, wchar_t **argv) {
// Start counters
getrusage(RUSAGE_SELF, &fish_usage[0]);
getrusage(RUSAGE_CHILDREN, &child_usage[0]);
clock_gettime(CLOCK_MONOTONIC, &wall[0]);
clock_gettime(CLOCK_SRC, &wall[0]);
if (parser.eval(std::move(new_cmd), *streams.io_chain, block_type_t::TOP) !=
eval_result_t::ok) {
@ -90,17 +100,25 @@ int builtin_time(parser_t &parser, io_streams_t &streams, wchar_t **argv) {
// Stop counters
getrusage(RUSAGE_SELF, &fish_usage[1]);
getrusage(RUSAGE_CHILDREN, &child_usage[1]);
clock_gettime(CLOCK_MONOTONIC, &wall[1]);
clock_gettime(CLOCK_SRC, &wall[1]);
int64_t fish_sys_micros = micros(fish_usage[1].ru_stime) - micros(fish_usage[0].ru_stime);
int64_t fish_usr_micros = micros(fish_usage[1].ru_utime) - micros(fish_usage[0].ru_utime);
int64_t child_sys_micros = micros(child_usage[1].ru_stime) - micros(child_usage[0].ru_stime);
int64_t child_usr_micros = micros(child_usage[1].ru_utime) - micros(child_usage[0].ru_utime);
uint64_t fish_sys_micros = micros(fish_usage[1].ru_stime) - micros(fish_usage[0].ru_stime);
uint64_t fish_usr_micros = micros(fish_usage[1].ru_utime) - micros(fish_usage[0].ru_utime);
uint64_t child_sys_micros = micros(child_usage[1].ru_stime) - micros(child_usage[0].ru_stime);
uint64_t child_usr_micros = micros(child_usage[1].ru_utime) - micros(child_usage[0].ru_utime);
// The result from getrusage is not necessarily realtime, it may be cached a few
// microseconds behind. In the event that execution completes extremely quickly or there is
// no data (say, we are measuring external execution time but no external processes have
// been launched), it can incorrectly appear to be negative.
fish_sys_micros = std::max(int64_t(0), fish_sys_micros);
fish_usr_micros = std::max(int64_t(0), fish_usr_micros);
child_sys_micros = std::max(int64_t(0), child_sys_micros);
child_usr_micros = std::max(int64_t(0), child_usr_micros);
uint64_t net_sys_micros = fish_sys_micros + child_sys_micros;
uint64_t net_usr_micros = fish_usr_micros + child_usr_micros;
uint64_t net_wall_micros = micros(wall[1]) - micros(wall[0]);
int64_t net_sys_micros = fish_sys_micros + child_sys_micros;
int64_t net_usr_micros = fish_usr_micros + child_usr_micros;
int64_t net_wall_micros = micros(wall[1]) - micros(wall[0]);
enum class unit {
minutes,
@ -109,13 +127,12 @@ int builtin_time(parser_t &parser, io_streams_t &streams, wchar_t **argv) {
microseconds,
};
auto get_unit = [](uint64_t micros) {
auto get_unit = [](int64_t micros) {
if (micros > 900 * 1E6) {
return unit::minutes;
}
else if (micros > 1 * 1E6) {
} else if (micros > 1 * 1E6) {
return unit::seconds;
} else if (micros > 10E3) {
} else if (micros > 1E3) {
return unit::milliseconds;
} else {
return unit::microseconds;
@ -131,7 +148,16 @@ int builtin_time(parser_t &parser, io_streams_t &streams, wchar_t **argv) {
}
};
auto convert = [](uint64_t micros, unit unit) {
auto unit_short_name = [](unit unit) {
switch (unit) {
case unit::minutes: return "mins";
case unit::seconds: return "secs";
case unit::milliseconds: return "millis";
case unit::microseconds: return "micros";
}
};
auto convert = [](int64_t micros, unit unit) {
switch (unit) {
case unit::minutes: return micros / 1.0E6 / 60.0;
case unit::seconds: return micros / 1.0E6;
@ -146,16 +172,43 @@ int builtin_time(parser_t &parser, io_streams_t &streams, wchar_t **argv) {
auto usr_time = convert(net_usr_micros, cpu_unit);
auto sys_time = convert(net_sys_micros, cpu_unit);
streams.out.append_format(
L"\n__________________________________" \
L"\nExecuted in %6.2F %s" \
L"\n usr time %6.2F %s" \
L"\n sys time %6.2F %s" \
L"\n\n",
wall_time, unit_name(wall_unit),
usr_time, unit_name(cpu_unit),
sys_time, unit_name(cpu_unit)
);
if (!verbose) {
streams.err.append_format(
L"\n_______________________________" \
L"\nExecuted in %6.2F %s" \
L"\n usr time %6.2F %s" \
L"\n sys time %6.2F %s" \
L"\n\n",
wall_time, unit_name(wall_unit),
usr_time, unit_name(cpu_unit),
sys_time, unit_name(cpu_unit)
);
} else {
auto fish_unit = get_unit((fish_sys_micros + fish_usr_micros) / 2);
auto child_unit = get_unit((child_sys_micros + child_usr_micros) / 2);
auto fish_usr_time = convert(fish_usr_micros, fish_unit);
auto fish_sys_time = convert(fish_sys_micros, fish_unit);
auto child_usr_time = convert(child_usr_micros, child_unit);
auto child_sys_time = convert(child_sys_micros, child_unit);
streams.err.append_format(
L"\n________________________________________________________" \
L"\nExecuted in %6.2F %s %*s %*s " \
L"\n usr time %6.2F %s %6.2F %s %6.2F %s " \
L"\n sys time %6.2F %s %6.2F %s %6.2F %s " \
L"\n\n",
wall_time, unit_short_name(wall_unit),
strlen(unit_short_name(wall_unit)) - 1, "fish",
strlen(unit_short_name(fish_unit)) - 1, "external",
usr_time, unit_short_name(cpu_unit),
fish_usr_time, unit_short_name(fish_unit),
child_usr_time, unit_short_name(child_unit),
sys_time, unit_short_name(cpu_unit),
fish_sys_time, unit_short_name(fish_unit),
child_sys_time, unit_short_name(child_unit)
);
}
}