path: root/dev-util/rt-tests/files/rt-tests-2.2-musl.patch

From 0b7a1e0d3463aa8aa4b7dcad0ec154e658d68036 Mon Sep 17 00:00:00 2001
From: Kurt Kanzenbach <kurt@kmk-computers.de>
Date: Wed, 1 Apr 2020 20:15:24 +0200
Subject: [PATCH] all: Fix musl build

There are a few problems:

 * pi stress:  pthread_attr_setaffinity_np() is not supported
 * cyclictest: SIGEV_THREAD_ID is not supported
 * hackbench:  Fix include
 * all:        Fix sched_* calls

With these changes applied, the rt-tests seem to run fine.

Signed-off-by: Kurt Kanzenbach <kurt@kmk-computers.de>
---
 Makefile                              |    5 --
 src/backfire/sendme.c                 |    1 
 src/cyclictest/cyclictest.c           |   70 ++++------------------------------
 src/hackbench/hackbench.c             |    4 +
 src/include/musl.h                    |   28 +++++++++++++
 src/lib/rt-utils.c                    |    1 
 src/pi_tests/classic_pi.c             |    2 
 src/pi_tests/tst-mutexpi10.c          |    2 
 src/pmqtest/pmqtest.c                 |    1 
 src/ptsematest/ptsematest.c           |    1 
 src/rt-migrate-test/rt-migrate-test.c |    1 
 src/sched_deadline/cyclicdeadline.c   |    1 
 12 files changed, 50 insertions(+), 67 deletions(-)
 create mode 100644 src/include/musl.h

--- a/Makefile
+++ b/Makefile
@@ -7,7 +7,6 @@ OBJDIR = bld
 sources = cyclictest.c \
 	  hackbench.c \
 	  pip_stress.c \
-	  pi_stress.c \
 	  pmqtest.c \
 	  ptsematest.c \
 	  rt-migrate-test.c \
@@ -42,7 +41,6 @@ ifeq (${PYLIB},)
 endif
 
 MANPAGES = src/cyclictest/cyclictest.8 \
-	   src/pi_tests/pi_stress.8 \
 	   src/ptsematest/ptsematest.8 \
 	   src/rt-migrate-test/rt-migrate-test.8 \
 	   src/sigwaittest/sigwaittest.8 \
@@ -130,9 +128,6 @@ deadline_test: $(OBJDIR)/deadline_test.o
 signaltest: $(OBJDIR)/signaltest.o $(OBJDIR)/librttest.a $(OBJDIR)/librttestnuma.a
 	$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $< $(LIBS) $(RTTESTLIB) $(RTTESTNUMA)
 
-pi_stress: $(OBJDIR)/pi_stress.o $(OBJDIR)/librttest.a
-	$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $< $(LIBS) $(RTTESTLIB)
-
 hwlatdetect:  src/hwlatdetect/hwlatdetect.py
 	chmod +x src/hwlatdetect/hwlatdetect.py
 	ln -s src/hwlatdetect/hwlatdetect.py hwlatdetect
--- a/src/backfire/sendme.c
+++ b/src/backfire/sendme.c
@@ -29,6 +29,7 @@
 #include <string.h>
 #include <time.h>
 #include <errno.h>
+#include "musl.h"
 #include "rt-utils.h"
 #include "rt-get_cpu.h"
 
--- a/src/cyclictest/cyclictest.c
+++ b/src/cyclictest/cyclictest.c
@@ -33,6 +33,7 @@
 #include <sys/utsname.h>
 #include <sys/mman.h>
 #include <sys/syscall.h>
+#include "musl.h"
 #include "rt_numa.h"
 
 #include "rt-utils.h"
@@ -502,12 +503,8 @@ static void *timerthread(void *param)
 {
 	struct thread_param *par = param;
 	struct sched_param schedp;
-	struct sigevent sigev;
 	sigset_t sigset;
-	timer_t timer;
 	struct timespec now, next, interval, stop;
-	struct itimerval itimer;
-	struct itimerspec tspec;
 	struct thread_stat *stat = par->stats;
 	int stopped = 0;
 	cpu_set_t mask;
@@ -538,14 +535,6 @@ static void *timerthread(void *param)
 	sigaddset(&sigset, par->signal);
 	sigprocmask(SIG_BLOCK, &sigset, NULL);
 
-	if (par->mode == MODE_CYCLIC) {
-		sigev.sigev_notify = SIGEV_THREAD_ID | SIGEV_SIGNAL;
-		sigev.sigev_signo = par->signal;
-		sigev.sigev_notify_thread_id = stat->tid;
-		timer_create(par->clock, &sigev, &timer);
-		tspec.it_interval = interval;
-	}
-
 	memset(&schedp, 0, sizeof(schedp));
 	schedp.sched_priority = par->prio;
 	if (setscheduler(0, par->policy, &schedp))
@@ -600,20 +589,6 @@ static void *timerthread(void *param)
 		stop = now;
 		stop.tv_sec += duration;
 	}
-	if (par->mode == MODE_CYCLIC) {
-		if (par->timermode == TIMER_ABSTIME)
-			tspec.it_value = next;
-		else
-			tspec.it_value = interval;
-		timer_settime(timer, par->timermode, &tspec, NULL);
-	}
-
-	if (par->mode == MODE_SYS_ITIMER) {
-		itimer.it_interval.tv_sec = interval.tv_sec;
-		itimer.it_interval.tv_usec = interval.tv_nsec / 1000;
-		itimer.it_value = itimer.it_interval;
-		setitimer(ITIMER_REAL, &itimer, NULL);
-	}
 
 	stat->threadstarted++;
 
@@ -621,16 +596,10 @@ static void *timerthread(void *param)
 
 		uint64_t diff;
 		unsigned long diff_smi = 0;
-		int sigs, ret;
+		int ret;
 
 		/* Wait for next period */
 		switch (par->mode) {
-		case MODE_CYCLIC:
-		case MODE_SYS_ITIMER:
-			if (sigwait(&sigset, &sigs) < 0)
-				goto out;
-			break;
-
 		case MODE_CLOCK_NANOSLEEP:
 			if (par->timermode == TIMER_ABSTIME) {
 				ret = clock_nanosleep(par->clock, TIMER_ABSTIME,
@@ -751,11 +720,6 @@ static void *timerthread(void *param)
 
 		next.tv_sec += interval.tv_sec;
 		next.tv_nsec += interval.tv_nsec;
-		if (par->mode == MODE_CYCLIC) {
-			int overrun_count = timer_getoverrun(timer);
-			next.tv_sec += overrun_count * interval.tv_sec;
-			next.tv_nsec += overrun_count * interval.tv_nsec;
-		}
 		tsnorm(&next);
 
 		while (tsgreater(&now, &next)) {
@@ -780,17 +744,6 @@ out:
 		pthread_mutex_unlock(&refresh_on_max_lock);
 	}
 
-	if (par->mode == MODE_CYCLIC)
-		timer_delete(timer);
-
-	if (par->mode == MODE_SYS_ITIMER) {
-		itimer.it_value.tv_sec = 0;
-		itimer.it_value.tv_usec = 0;
-		itimer.it_interval.tv_sec = 0;
-		itimer.it_interval.tv_usec = 0;
-		setitimer(ITIMER_REAL, &itimer, NULL);
-	}
-
 	/* close msr file */
 	if (smi)
 		close(par->msr_fd);
@@ -1174,7 +1127,8 @@ static void process_options(int argc, ch
 		case OPT_VERBOSE: verbose = 1; break;
 		case 'x':
 		case OPT_POSIX_TIMERS:
-			use_nanosleep = MODE_CYCLIC; break;
+			fatal("--posix_timers is not available on your libc\n");
+			break;
 		case '?':
 		case OPT_HELP:
 			display_help(0); break;
@@ -1207,13 +1161,6 @@ static void process_options(int argc, ch
 		}
 	}
 
-	if ((use_system == MODE_SYS_OFFSET) && (use_nanosleep == MODE_CYCLIC)) {
-		warn("The system option requires clock_nanosleep\n");
-		warn("and is not compatible with posix_timers\n");
-		warn("Using clock_nanosleep\n");
-		use_nanosleep = MODE_CLOCK_NANOSLEEP;
-	}
-
 	/* if smp wasn't requested, test for numa automatically */
 	if (!smp) {
 		numa = numa_initialize();
@@ -1943,7 +1890,6 @@ int main(int argc, char **argv)
 
 	}
 
-
 	mode = use_nanosleep + use_system;
 
 	sigemptyset(&sigset);
@@ -1993,16 +1939,18 @@ int main(int argc, char **argv)
 			void *stack;
 			void *currstk;
 			size_t stksize;
+			int err;
 
 			/* find the memory node associated with the cpu i */
 			node = rt_numa_numa_node_of_cpu(cpu);
 
-			/* get the stack size set for this thread */
-			if (pthread_attr_getstack(&attr, &currstk, &stksize))
+			/* get the stack size set for for this thread */
+			err = pthread_attr_getstack(&attr, &currstk, &stksize);
+			if (err != EINVAL)
 				fatal("failed to get stack size for thread %d\n", i);
 
 			/* if the stack size is zero, set a default */
-			if (stksize == 0)
+			if (err == EINVAL || stksize == 0)
 				stksize = PTHREAD_STACK_MIN * 2;
 
 			/*  allocate memory for a stack on appropriate node */
--- a/src/hackbench/hackbench.c
+++ b/src/hackbench/hackbench.c
@@ -24,13 +24,15 @@
 #include <sys/socket.h>
 #include <sys/wait.h>
 #include <sys/time.h>
-#include <sys/poll.h>
+#include <poll.h>
 #include <limits.h>
 #include <getopt.h>
 #include <signal.h>
 #include <setjmp.h>
 #include <sched.h>
 
+#include "musl.h"
+
 static unsigned int datasize = 100;
 static unsigned int loops = 100;
 static unsigned int num_groups = 10;
--- /dev/null
+++ b/src/include/musl.h
@@ -0,0 +1,28 @@
+/*
+ * Copyright (C) 2020 Kurt Kanzenbach <kurt@kmk-computers.de>
+ * Time-stamp: <2020-04-04 10:54:01 kurt>
+ */
+
+#ifndef _MUSL_H_
+#define _MUSL_H_
+
+#include <unistd.h>
+#include <sys/syscall.h>
+
+/*
+ * Musl someshow defines sched_* to ENOSYS which is not correct ...
+ * See commit 1e21e78bf7a5 ("add support for thread scheduling (POSIX TPS option)")
+ *
+ * Workaround: define them to syscall(...)
+ */
+
+#define sched_getparam(pid, param)		\
+	syscall(SYS_sched_getparam, pid, param)
+#define sched_setparam(pid, param)		\
+	syscall(SYS_sched_setparam, pid, param)
+#define sched_getscheduler(pid)			\
+	syscall(SYS_sched_getscheduler, pid)
+#define sched_setscheduler(pid, policy, param)			\
+	syscall(SYS_sched_setscheduler, pid, policy, param)
+
+#endif /* _MUSL_H_ */
--- a/src/lib/rt-utils.c
+++ b/src/lib/rt-utils.c
@@ -24,6 +24,7 @@
 #include <time.h>
 #include <sys/time.h>
 
+#include "musl.h"
 #include "rt-utils.h"
 #include "rt-sched.h"
 #include "rt-error.h"
--- a/src/pi_tests/classic_pi.c
+++ b/src/pi_tests/classic_pi.c
@@ -34,6 +34,8 @@
 #include <signal.h>
 #include <getopt.h>
 
+#include "musl.h"
+
 /* test timeout */
 #define TIMEOUT 2
 
--- a/src/pi_tests/tst-mutexpi10.c
+++ b/src/pi_tests/tst-mutexpi10.c
@@ -35,6 +35,8 @@
 #include <string.h>
 #include <signal.h>
 
+#include "musl.h"
+
 /* test timeout */
 #define TIMEOUT 2
 
--- a/src/pmqtest/pmqtest.c
+++ b/src/pmqtest/pmqtest.c
@@ -24,6 +24,7 @@
 #include <pthread.h>
 #include <inttypes.h>
 
+#include "musl.h"
 #include "rt-utils.h"
 #include "rt-get_cpu.h"
 #include "rt-error.h"
--- a/src/ptsematest/ptsematest.c
+++ b/src/ptsematest/ptsematest.c
@@ -22,6 +22,7 @@
 #include <pthread.h>
 #include <inttypes.h>
 
+#include "musl.h"
 #include "rt-utils.h"
 #include "rt-get_cpu.h"
 #include "rt-error.h"
--- a/src/rt-migrate-test/rt-migrate-test.c
+++ b/src/rt-migrate-test/rt-migrate-test.c
@@ -27,6 +27,7 @@
 
 #include <linux/unistd.h>
 
+#include "musl.h"
 #include "rt-utils.h"
 
 int nr_tasks;
--- a/src/sched_deadline/cyclicdeadline.c
+++ b/src/sched_deadline/cyclicdeadline.c
@@ -30,6 +30,7 @@
 #include <linux/unistd.h>
 #include <linux/magic.h>
 
+#include "musl.h"
 #include "rt-utils.h"
 #include "rt-sched.h"
 #include "rt-error.h"