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https://github.com/cuberite/libevent.git
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Merge branch 'osx-clock'
Moves the thread into real-time scheduling class, as recommended in [1], it
fixes the separate test provided by @ygj6 [2] everywhere (github actions,
travis-ci, appveyor) under osx.
[1]: https://developer.apple.com/library/archive/technotes/tn2169/_index.html
[2]: dde1a6e4d0
Although even after this changes the following time-related tests failed
on travis-ci:
- no_events
- del_wait
But anyway I guess #940 can be closed, since this fixes the issue in common.
* osx-clock:
test: Use THREAD_* wrappers in del_notify/del_wait
test: move threads created with THREAD_START() to realtime scheduling class too
test: put thread into real time scheduling class on osx for better latencies
Closes: #940
(cherry picked from commit a6f81aa45455c8afb69980f7026a0e706f4f9387)
This commit is contained in:
Azat Khuzhin
parent
677378ea42
commit
e85afbe3d5
@ -440,6 +440,7 @@ endif()
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CHECK_INCLUDE_FILE(sys/uio.h EVENT__HAVE_SYS_UIO_H)
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CHECK_INCLUDE_FILES("sys/types.h;ifaddrs.h" EVENT__HAVE_IFADDRS_H)
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CHECK_INCLUDE_FILE(mach/mach_time.h EVENT__HAVE_MACH_MACH_TIME_H)
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CHECK_INCLUDE_FILE(mach/mach.h EVENT__HAVE_MACH_MACH_H)
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CHECK_INCLUDE_FILE(netinet/tcp.h EVENT__HAVE_NETINET_TCP_H)
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CHECK_INCLUDE_FILE(sys/wait.h EVENT__HAVE_SYS_WAIT_H)
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CHECK_INCLUDE_FILE(sys/resource.h EVENT__HAVE_SYS_RESOURCE_H)
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@ -222,6 +222,7 @@ AC_CHECK_HEADERS([ \
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fcntl.h \
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ifaddrs.h \
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mach/mach_time.h \
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mach/mach.h \
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netdb.h \
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netinet/in.h \
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netinet/in6.h \
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@ -178,6 +178,9 @@
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/* Define to 1 if you have the <mach/mach_time.h> header file. */
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#cmakedefine EVENT__HAVE_MACH_MACH_TIME_H 1
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/* Define to 1 if you have the <mach/mach.h> header file. */
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#cmakedefine EVENT__HAVE_MACH_MACH_H 1
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/* Define to 1 if you have the <memory.h> header file. */
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#cmakedefine EVENT__HAVE_MEMORY_H 1
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@ -31,10 +31,6 @@
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#include <windows.h>
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#endif
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#ifdef EVENT__HAVE_PTHREADS
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#include <pthread.h>
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#endif
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#include "event2/event-config.h"
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#include <sys/types.h>
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@ -73,6 +69,7 @@
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#include "time-internal.h"
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#include "regress.h"
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#include "regress_thread.h"
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#ifndef _WIN32
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#include "regress.gen.h"
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@ -979,7 +976,7 @@ test_fork(void)
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evutil_closesocket(child_pair[1]);
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}
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#ifdef EVENT__HAVE_PTHREADS
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#ifdef EVTHREAD_USE_PTHREADS_IMPLEMENTED
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static void* del_wait_thread(void *arg)
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{
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struct timeval tv_start, tv_end;
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@ -1007,14 +1004,14 @@ static void
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test_del_wait(void)
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{
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struct event ev;
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pthread_t thread;
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THREAD_T thread;
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setup_test("event_del will wait: ");
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event_set(&ev, pair[1], EV_READ|EV_PERSIST, del_wait_cb, &ev);
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event_add(&ev, NULL);
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pthread_create(&thread, NULL, del_wait_thread, NULL);
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THREAD_START(thread, del_wait_thread, NULL);
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if (write(pair[0], TEST1, strlen(TEST1)+1) < 0) {
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tt_fail_perror("write");
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@ -1033,7 +1030,7 @@ test_del_wait(void)
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test_timeval_diff_eq(&tv_start, &tv_end, 270);
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}
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pthread_join(thread, NULL);
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THREAD_JOIN(thread);
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tt_int_op(test_ok, ==, 1);
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@ -3505,8 +3502,8 @@ struct testcase_t main_testcases[] = {
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#ifndef _WIN32
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LEGACY(fork, TT_ISOLATED),
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#endif
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#ifdef EVENT__HAVE_PTHREADS
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/** TODO: support win32 */
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#ifdef EVTHREAD_USE_PTHREADS_IMPLEMENTED
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LEGACY(del_wait, TT_ISOLATED|TT_NEED_THREADS|TT_RETRIABLE),
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LEGACY(del_notify, TT_ISOLATED|TT_NEED_THREADS),
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#endif
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@ -139,6 +139,7 @@ SSL_CTX *get_ssl_ctx(void);
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void init_ssl(void);
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#endif
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void thread_setup(pthread_t pthread);
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void * basic_test_setup(const struct testcase_t *testcase);
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int basic_test_cleanup(const struct testcase_t *testcase, void *ptr);
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@ -186,6 +186,52 @@ ignore_log_cb(int s, const char *msg)
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{
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}
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#if defined(__APPLE__)
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#ifdef EVENT__HAVE_MACH_MACH_H
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#include <mach/mach.h>
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#endif
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#ifdef EVENT__HAVE_MACH_MACH_TIME_H
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#include <mach/mach_time.h>
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#endif
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#include <pthread.h>
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/**
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* Put into the real time scheduling class for better timers latency.
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* https://developer.apple.com/library/archive/technotes/tn2169/_index.html#//apple_ref/doc/uid/DTS40013172-CH1-TNTAG6000
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*/
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void move_pthread_to_realtime_scheduling_class(pthread_t pthread)
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{
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mach_timebase_info_data_t timebase_info;
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mach_timebase_info(&timebase_info);
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const uint64_t NANOS_PER_MSEC = 1000000ULL;
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double clock2abs = ((double)timebase_info.denom / (double)timebase_info.numer) * NANOS_PER_MSEC;
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thread_time_constraint_policy_data_t policy;
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policy.period = 0;
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policy.computation = (uint32_t)(5 * clock2abs); // 5 ms of work
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policy.constraint = (uint32_t)(10 * clock2abs);
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policy.preemptible = FALSE;
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int kr = thread_policy_set(pthread_mach_thread_np(pthread_self()),
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THREAD_TIME_CONSTRAINT_POLICY,
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(thread_policy_t)&policy,
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THREAD_TIME_CONSTRAINT_POLICY_COUNT);
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if (kr != KERN_SUCCESS) {
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mach_error("thread_policy_set:", kr);
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exit(1);
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}
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}
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void thread_setup(pthread_t pthread)
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{
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move_pthread_to_realtime_scheduling_class(pthread);
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}
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#else
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void thread_setup(pthread_t pthread) {}
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#endif
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void *
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basic_test_setup(const struct testcase_t *testcase)
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{
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@ -193,6 +239,8 @@ basic_test_setup(const struct testcase_t *testcase)
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evutil_socket_t spair[2] = { -1, -1 };
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struct basic_test_data *data = NULL;
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thread_setup(pthread_self());
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#ifndef _WIN32
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if (testcase->flags & TT_ENABLE_IOCP_FLAG)
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return (void*)TT_SKIP;
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@ -27,22 +27,26 @@
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#ifndef REGRESS_THREAD_H_INCLUDED_
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#define REGRESS_THREAD_H_INCLUDED_
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#include "regress.h"
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#ifdef EVENT__HAVE_PTHREADS
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#include <pthread.h>
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#define THREAD_T pthread_t
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#define THREAD_FN void *
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#define THREAD_RETURN() return (NULL)
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#define THREAD_START(threadvar, fn, arg) \
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pthread_create(&(threadvar), NULL, fn, arg)
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#define THREAD_START(threadvar, fn, arg) do { \
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if (!pthread_create(&(threadvar), NULL, fn, arg)) \
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thread_setup(threadvar); \
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} while (0)
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#define THREAD_JOIN(th) pthread_join(th, NULL)
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#else
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#define THREAD_T HANDLE
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#define THREAD_FN unsigned __stdcall
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#define THREAD_RETURN() return (0)
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#define THREAD_START(threadvar, fn, arg) do { \
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uintptr_t threadhandle = _beginthreadex(NULL,0,fn,(arg),0,NULL); \
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(threadvar) = (HANDLE) threadhandle; \
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} while (0)
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uintptr_t threadhandle = _beginthreadex(NULL,0,fn,(arg),0,NULL); \
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(threadvar) = (HANDLE) threadhandle; \
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} while (0)
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#define THREAD_JOIN(th) WaitForSingleObject(th, INFINITE)
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#endif
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