mirrors/cosmopolitan
1
0
Fork 0
mirror of https://github.com/jart/cosmopolitan.git synced 2025-07-04 10:18:31 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

Make some more fixes

Browse source 
This change deletes mkfifo() so that GNU Make on Windows will work in
parallel mode using its pipe-based implementation. There's an example
called greenbean2 now, which shows how to build a scalable web server
for Windows with 10k+ threads. The accuracy of clock_nanosleep is now
significantly improved on Linux.
This commit is contained in:
Justine Tunney 2023-10-09 11:56:21 -07:00
parent 820c3599ed
commit 3b4dbc9fdd
No known key found for this signature in database
GPG key ID: BE714B4575D6E328
22 changed files with 870 additions and 330 deletions
Download patch file Download diff file Expand all files Collapse all files

20
tool/viz/clock_nanosleep_accuracy.c
View file

@ -23,7 +23,7 @@
#include "libc/stdio/stdio.h"
#include "libc/sysv/consts/clock.h"
#define MAXIMUM 1e8
#define MAXIMUM 1e9
#define ITERATIONS 10
void WarmUp(void) {
@ -33,34 +33,36 @@ void WarmUp(void) {
void TestSleepRealRelative(void) {
printf("\n");
printf("testing: clock_nanosleep(CLOCK_REALTIME) with relative timeout\n");
printf("testing: clock_nanosleep(CLOCK_REALTIME) with relative "
"timeout\n");
for (long nanos = 1; nanos < (long)MAXIMUM; nanos *= 2) {
struct timespec t1, t2, wf;
wf = timespec_fromnanos(nanos);
clock_gettime(CLOCK_REALTIME_PRECISE, &t1);
clock_gettime(CLOCK_REALTIME, &t1);
for (int i = 0; i < ITERATIONS; ++i) {
npassert(!clock_nanosleep(CLOCK_REALTIME, 0, &wf, 0));
}
clock_gettime(CLOCK_REALTIME_PRECISE, &t2);
clock_gettime(CLOCK_REALTIME, &t2);
long took = timespec_tonanos(timespec_sub(t2, t1)) / ITERATIONS;
printf("%,11ld ns sleep took %,11ld ns delta %,11ld ns\n", nanos, took,
printf("%,12ld ns sleep took %,12ld ns delta %,12ld ns\n", nanos, took,
took - nanos);
}
}
void TestSleepMonoRelative(void) {
printf("\n");
printf("testing: clock_nanosleep(CLOCK_MONOTONIC) with relative timeout\n");
printf("testing: clock_nanosleep(CLOCK_MONOTONIC) with relative "
"timeout\n");
for (long nanos = 1; nanos < (long)MAXIMUM; nanos *= 2) {
struct timespec t1, t2, wf;
wf = timespec_fromnanos(nanos);
clock_gettime(CLOCK_REALTIME_PRECISE, &t1);
clock_gettime(CLOCK_REALTIME, &t1);
for (int i = 0; i < ITERATIONS; ++i) {
npassert(!clock_nanosleep(CLOCK_MONOTONIC, 0, &wf, 0));
}
clock_gettime(CLOCK_REALTIME_PRECISE, &t2);
clock_gettime(CLOCK_REALTIME, &t2);
long took = timespec_tonanos(timespec_sub(t2, t1)) / ITERATIONS;
printf("%,11ld ns sleep took %,11ld ns delta %,11ld ns\n", nanos, took,
printf("%,12ld ns sleep took %,12ld ns delta %,12ld ns\n", nanos, took,
took - nanos);
}
}