From: "Schaffner, Tobias" <tobias.schaffner@siemens.com>
To: "johannes.kirchmair@sigmatek.at" <johannes.kirchmair@sigmatek.at>,
"xenomai@lists.linux.dev" <xenomai@lists.linux.dev>,
"Kiszka, Jan" <jan.kiszka@siemens.com>
Subject: Re: [PATCH 1/3] [POC] test implementaion of rt-signals
Date: Wed, 9 Aug 2023 09:50:00 +0000 [thread overview]
Message-ID: <9725169b-3476-20b9-7dd0-1ae1dc870a7d@siemens.com> (raw)
In-Reply-To: <VE1PR08MB4909999B96106DD25AE0D19D92769@VE1PR08MB4909.eurprd08.prod.outlook.com>
Hi Johannes,
On 09.05.23 15:17, Johannes Kirchmair wrote:
> Hello Jan and Tobias,
>
> I just dropped the patches on the mailing list.
> For the dovetail functions I took a rather naive approach, using most of the frame setup code provided by Linux.
> I just tested it for 32bit and 64bit x86 Applications and it seems to work.
>
> I also added a tool rt_signal_hist that runs in a cycle and measures the time an exception handling takes.
> It is afterwards put into an txt file that reassembles an histogram of the timings.
>
> Unfortunately as a 32bit application the rt_signal_hist tool does not run to completion, printing the following:
> " Xenomai/cobalt: sleeping while holding mutex
> CPU time limit exceeded"
I finally had some time to look at it again.
There is a problem in the dovetail patch you send.
In dovetail_restore_32_rt_signal_frame the ax register is returned. This
is a long unsigned int that is returned as an int. When it becomes
negative every now and then, it is interpreted as an error.
The dovetail_restore_64_rt_signal_frame function has the same issue, but
the return value is ignored for x64.
As you already noticed:
The xnarch_rt_sigreturn_ia32 reacts with a
xnthread_call_mayday(xnthread_current(), SIGKILL);
SIGKILL may not be used in this context. It is interpreted as a
sigdebug_reason which leads to the wrong SIGDEBUG_MUTEX_SLEEP signal and
the corresponding "Xenomai/cobalt: sleeping while holding mutex" message.
All the best,
Tobias
> Maybe the naive approach is not so reliable ;-/
> Hope I find the time the look into it.
>
> Sorry for not putting more effort into this so fare.
>
> The next most important step in my opinion would be to define a clean interface into dovetail for the signal frame setup and restoring.
> Actually that's the task I consider one of the harder and I am not so sure how to approach this.
>
> Best regards
> Johannes
>
>> -----Original Message-----
>> From: Johannes Kirchmair <johannes.kirchmair@sigmatek.at>
>> Sent: Dienstag, 9. Mai 2023 15:14
>> To: xenomai@lists.linux.dev
>> Cc: Johannes Kirchmair <johannes.kirchmair@sigmatek.at>
>> Subject: [PATCH 1/3] [POC] test implementaion of rt-signals
>>
>> We implement rt signals to handle exceptions in rt stage.
>>
>> This is done using dovetail specific functions for setting up the signal
>> frame.
>>
>> This can be used to handle fpe exceptions on the fly, like fixing
>> division by zero. An other use case are breakpoints, implemented using the
>> illegal opcode exception. The real time handling of the breakpoints would
>> be handy for conditional breakpoints or also for stopping watchdogs and
>> other tasks in time.
>>
>> Signed-off-by: Johannes Kirchmair <johannes.kirchmair@sigmatek.at>
>> ---
>> include/cobalt/kernel/ppd.h | 3 +
>> include/cobalt/kernel/thread.h | 2 +
>> include/cobalt/signal.h | 2 +
>> include/cobalt/uapi/syscall.h | 6 ++
>> kernel/cobalt/arch/x86/Makefile | 2 +-
>> .../arch/x86/include/asm/xenomai/thread.h | 13 ++++
>> kernel/cobalt/arch/x86/signal_ia32.c | 75 +++++++++++++++++++
>> kernel/cobalt/arch/x86/signal_ia64.c | 26 +++++++
>> kernel/cobalt/dovetail/kevents.c | 5 ++
>> kernel/cobalt/posix/process.c | 3 +-
>> kernel/cobalt/posix/syscall.c | 28 +++++++
>> kernel/cobalt/posix/syscall32.c | 16 ++++
>> kernel/cobalt/thread.c | 39 ++++++++++
>> lib/cobalt/arch/x86/Makefile.am | 2 +-
>> lib/cobalt/arch/x86/sigreturn.c | 32 ++++++++
>> lib/cobalt/internal.h | 2 +
>> lib/cobalt/signal.c | 13 ++++
>> 17 files changed, 266 insertions(+), 3 deletions(-)
>> create mode 100644 kernel/cobalt/arch/x86/signal_ia32.c
>> create mode 100644 kernel/cobalt/arch/x86/signal_ia64.c
>> create mode 100644 lib/cobalt/arch/x86/sigreturn.c
>>
>> diff --git a/include/cobalt/kernel/ppd.h b/include/cobalt/kernel/ppd.h
>> index f0079fe6e..fb2f682da 100644
>> --- a/include/cobalt/kernel/ppd.h
>> +++ b/include/cobalt/kernel/ppd.h
>> @@ -22,6 +22,7 @@
>> #include <linux/types.h>
>> #include <linux/atomic.h>
>> #include <linux/rbtree.h>
>> +#include <linux/signal.h>
>> #include <cobalt/kernel/heap.h>
>>
>> struct cobalt_umm {
>> @@ -32,6 +33,8 @@ struct cobalt_umm {
>>
>> struct cobalt_ppd {
>> struct cobalt_umm umm;
>> + void __user *sighand[_NSIG];
>> + void __user *sigrestorer;
>> atomic_t refcnt;
>> char *exe_path;
>> struct rb_root fds;
>> diff --git a/include/cobalt/kernel/thread.h b/include/cobalt/kernel/thread.h
>> index b79cb8429..33d468419 100644
>> --- a/include/cobalt/kernel/thread.h
>> +++ b/include/cobalt/kernel/thread.h
>> @@ -574,6 +574,8 @@ static inline void xnthread_propagate_schedparam(struct
>> xnthread *curr)
>> __xnthread_propagate_schedparam(curr);
>> }
>>
>> +int xnthread_handle_rt_signals(unsigned int trapnr, struct pt_regs *regs);
>> +
>> extern struct xnthread_personality xenomai_personality;
>>
>> /** @} */
>> diff --git a/include/cobalt/signal.h b/include/cobalt/signal.h
>> index 62694f93a..3d6540aff 100644
>> --- a/include/cobalt/signal.h
>> +++ b/include/cobalt/signal.h
>> @@ -54,6 +54,8 @@ COBALT_DECL(int, kill(pid_t pid, int sig));
>> COBALT_DECL(int, sigqueue(pid_t pid, int sig,
>> const union sigval value));
>>
>> +int cobalt_rt_signal(int sig, void (*handler)(int, siginfo_t *, void *));
>> +
>> #ifdef __cplusplus
>> }
>> #endif
>> diff --git a/include/cobalt/uapi/syscall.h b/include/cobalt/uapi/syscall.h
>> index 9646a0d97..6307fae7f 100644
>> --- a/include/cobalt/uapi/syscall.h
>> +++ b/include/cobalt/uapi/syscall.h
>> @@ -137,6 +137,12 @@
>> #define sc_cobalt_recvmmsg64 114
>> #define sc_cobalt_cond_wait_prologue64 115
>>
>> +/*
>> + * Sigmatek specific syscalls
>> + */
>> +#define sc_cobalt_sigreturn 120
>> +#define sc_cobalt_sigaction 121
>> +
>> #define __NR_COBALT_SYSCALLS 128 /* Power of 2 */
>>
>> #endif /* !_COBALT_UAPI_SYSCALL_H */
>> diff --git a/kernel/cobalt/arch/x86/Makefile b/kernel/cobalt/arch/x86/Makefile
>> index 93929b645..e725afbff 100644
>> --- a/kernel/cobalt/arch/x86/Makefile
>> +++ b/kernel/cobalt/arch/x86/Makefile
>> @@ -1,5 +1,5 @@
>>
>> obj-$(CONFIG_XENOMAI) += xenomai.o
>> -xenomai-y := machine.o smi.o c1e.o
>> +xenomai-y := machine.o smi.o c1e.o signal_ia32.o signal_ia64.o
>>
>> ccflags-y := -I$(srctree)/arch/x86/xenomai/include -I$(srctree)/include/xenomai
>> diff --git a/kernel/cobalt/arch/x86/include/asm/xenomai/thread.h
>> b/kernel/cobalt/arch/x86/include/asm/xenomai/thread.h
>> index 745c32467..4d004680b 100644
>> --- a/kernel/cobalt/arch/x86/include/asm/xenomai/thread.h
>> +++ b/kernel/cobalt/arch/x86/include/asm/xenomai/thread.h
>> @@ -28,5 +28,18 @@
>> #define xnarch_fault_bp_p(__nr) ((current->ptrace & PT_PTRACED)
>> && \
>> ((__nr) == X86_TRAP_DB || (__nr) ==
>> X86_TRAP_BP))
>> #define xnarch_fault_notify(__nr) (!xnarch_fault_bp_p(__nr))
>> +#define xnarch_fault_code(__regs) ((__regs)->orig_ax)
>> +int xnarch_setup_trap_info(unsigned int vector, struct pt_regs *regs,
>> + long errcode, int *sig, struct kernel_siginfo *info);
>> +
>> +int xnarch_setup_rt_frame_ia32(int sig, void *handler, struct kernel_siginfo *si,
>> + struct pt_regs *regs, void __user *restorer);
>> +
>> +int xnarch_rt_sigreturn_ia32(struct pt_regs *regs);
>> +
>> +int xnarch_setup_rt_frame_ia64(int sig, void *handler, struct kernel_siginfo *si,
>> + struct pt_regs *regs, void __user *restorer);
>> +
>> +int xnarch_rt_sigreturn_ia64(struct pt_regs *regs);
>>
>> #endif /* !_COBALT_X86_ASM_THREAD_H */
>> diff --git a/kernel/cobalt/arch/x86/signal_ia32.c
>> b/kernel/cobalt/arch/x86/signal_ia32.c
>> new file mode 100644
>> index 000000000..e78c8c4d4
>> --- /dev/null
>> +++ b/kernel/cobalt/arch/x86/signal_ia32.c
>> @@ -0,0 +1,75 @@
>> +#include <linux/signal.h>
>> +#include <linux/uaccess.h>
>> +#include <cobalt/kernel/thread.h>
>> +
>> +#include <asm/sigframe.h>
>> +#include <asm/sighandling.h>
>> +#include <asm/fpu/signal.h>
>> +
>> +int xnarch_setup_trap_info(unsigned int vector, struct pt_regs *regs,
>> + long errcode, int *sig, struct kernel_siginfo *info)
>> +{
>> + switch (vector) {
>> + case 0: /* divide_error */
>> + *sig = SIGFPE;
>> + info->si_signo = *sig;
>> + info->si_errno = 0;
>> + info->si_code = FPE_INTDIV;
>> + info->si_addr = (void __user *)regs->ip;
>> + return 0;
>> + case 1: /* trap_error */ {
>> + unsigned long condition;
>> + get_debugreg(condition, 6);
>> + set_debugreg(0, 7);
>> + *sig = SIGTRAP;
>> + info->si_signo = *sig;
>> + info->si_errno = errcode;
>> + info->si_code = get_si_code(condition);
>> + info->si_addr = (void __user *)regs->ip;
>> + return 0;
>> + }
>> + case 3: /* trap_error */
>> + *sig = SIGTRAP;
>> + info->si_signo = *sig;
>> + info->si_errno = errcode;
>> + info->si_code = SI_KERNEL;
>> + info->si_addr = (void __user *)regs->ip;
>> + return 0;
>> + case 6: /* invalid_op */
>> + *sig = SIGILL;
>> + info->si_signo = *sig;
>> + info->si_errno = 0;
>> + info->si_code = ILL_ILLOPN;
>> + info->si_addr = (void __user *)regs->ip;
>> + return 0;
>> + case 16: { /* coprocessor_error */
>> + *sig = SIGFPE;
>> +
>> + info->si_signo = *sig;
>> + info->si_errno = 0;
>> + info->si_code = 0;
>> + info->si_addr = (void __user *)regs->ip;
>> + return 0;
>> + }
>> + default:
>> + break;
>> + }
>> +
>> + return -ENOSYS;
>> +}
>> +
>> +int xnarch_rt_sigreturn_ia32(struct pt_regs *regs)
>> +{
>> + int ret;
>> +
>> + ret = dovetail_restore_rt_signal_frame(regs);
>> + if (ret < 0)
>> + goto badframe;
>> +
>> + return regs->ax;
>> +
>> +badframe:
>> + xnthread_call_mayday(xnthread_current(), SIGKILL);
>> + return -1;
>> +}
>> +
>> diff --git a/kernel/cobalt/arch/x86/signal_ia64.c
>> b/kernel/cobalt/arch/x86/signal_ia64.c
>> new file mode 100644
>> index 000000000..a7044db40
>> --- /dev/null
>> +++ b/kernel/cobalt/arch/x86/signal_ia64.c
>> @@ -0,0 +1,26 @@
>> +// SPDX-License-Identifier: GPL-2.0
>> +/*
>> + * Copyright (C) 1991, 1992 Linus Torvalds
>> + * Copyright (C) 2000, 2001, 2002 Andi Kleen SuSE Labs
>> + *
>> + * 1997-11-28 Modified for POSIX.1b signals by Richard Henderson
>> + * 2000-06-20 Pentium III FXSR, SSE support by Gareth Hughes
>> + * 2000-2002 x86-64 support by Andi Kleen
>> + */
>> +
>> +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
>> +
>> +
>> +#include <linux/signal.h>
>> +#include <linux/uaccess.h>
>> +#include <cobalt/kernel/thread.h>
>> +
>> +#include <asm/sigframe.h>
>> +#include <asm/sighandling.h>
>> +#include <asm/fpu/signal.h>
>> +
>> +int xnarch_rt_sigreturn_ia64(struct pt_regs *regs)
>> +{
>> + return dovetail_restore_rt_signal_frame(regs);
>> +}
>> +
>> diff --git a/kernel/cobalt/dovetail/kevents.c b/kernel/cobalt/dovetail/kevents.c
>> index 4da4f51b7..61417717b 100644
>> --- a/kernel/cobalt/dovetail/kevents.c
>> +++ b/kernel/cobalt/dovetail/kevents.c
>> @@ -57,6 +57,9 @@ void handle_oob_trap_entry(unsigned int trapnr, struct
>> pt_regs *regs)
>> xnsched_run();
>> }
>>
>> + if (xnthread_handle_rt_signals(trapnr, regs) == 0)
>> + return;
>> +
>> /*
>> * If we experienced a trap on behalf of a shadow thread
>> * running in primary mode, move it to the Linux domain,
>> @@ -88,6 +91,8 @@ void handle_oob_trap_entry(unsigned int trapnr, struct
>> pt_regs *regs)
>> xnstat_counter_inc(&thread->stat.pf);
>>
>> xnthread_relax(xnarch_fault_notify(trapnr), SIGDEBUG_MIGRATE_FAULT);
>> +
>> + return;
>> }
>>
>> static inline int handle_setaffinity_event(struct dovetail_migration_data *d)
>> diff --git a/kernel/cobalt/posix/process.c b/kernel/cobalt/posix/process.c
>> index 1abc86f37..2069129cb 100644
>> --- a/kernel/cobalt/posix/process.c
>> +++ b/kernel/cobalt/posix/process.c
>> @@ -738,9 +738,10 @@ void cobalt_unregister_debugged_thread(struct
>> xnthread *thread)
>> cobalt_resume_debugged_process(process);
>> }
>>
>> +#ifdef CONFIG_SMP
>> +
>> int cobalt_handle_setaffinity_event(struct task_struct *task)
>> {
>> -#ifdef CONFIG_SMP
>> struct xnthread *thread;
>> spl_t s;
>>
>> diff --git a/kernel/cobalt/posix/syscall.c b/kernel/cobalt/posix/syscall.c
>> index 46c4998e4..b4bd4c587 100644
>> --- a/kernel/cobalt/posix/syscall.c
>> +++ b/kernel/cobalt/posix/syscall.c
>> @@ -277,6 +277,34 @@ static COBALT_SYSCALL(serialdbg, current,
>> return 0;
>> }
>>
>> +static COBALT_SYSCALL(sigreturn, current, (void))
>> +{
>> + struct pt_regs *regs = task_pt_regs(current);
>> +
>> + if (regs->cs == __USER_CS)
>> + xnarch_rt_sigreturn_ia64(regs);
>> + if (regs->cs == __USER32_CS)
>> + xnarch_rt_sigreturn_ia32(regs);
>> +
>> + return __xn_reg_rval(regs);
>> +}
>> +
>> +static COBALT_SYSCALL(sigaction, current, (int sig, void __user *handler,
>> + void __user *restorer))
>> +{
>> + struct cobalt_ppd *sys_ppd = cobalt_ppd_get(0);
>> +
>> + if (sig < 0 || sig >= _NSIG)
>> + return -EINVAL;
>> +
>> + sys_ppd->sighand[sig] = handler;
>> +
>> + if (!sys_ppd->sigrestorer)
>> + sys_ppd->sigrestorer = restorer;
>> +
>> + return 0;
>> +}
>> +
>> static void stringify_feature_set(unsigned long fset, char *buf, int size)
>> {
>> unsigned long feature;
>> diff --git a/kernel/cobalt/posix/syscall32.c b/kernel/cobalt/posix/syscall32.c
>> index b65a0a760..f8b21bfb2 100644
>> --- a/kernel/cobalt/posix/syscall32.c
>> +++ b/kernel/cobalt/posix/syscall32.c
>> @@ -774,6 +774,22 @@ COBALT_SYSCALL32emu(sigqueue, conforming,
>> return ret ?: __cobalt_sigqueue(pid, sig, &val);
>> }
>>
>> +COBALT_SYSCALL32emu(sigaction, current,
>> + (int sig, void __user *handler, void __user *restorer))
>> +{
>> + struct cobalt_ppd *sys_ppd = cobalt_ppd_get(0);
>> +
>> + if (sig < 0 || sig >= _NSIG)
>> + return -EINVAL;
>> +
>> + sys_ppd->sighand[sig] = handler;
>> +
>> + if (!sys_ppd->sigrestorer)
>> + sys_ppd->sigrestorer = restorer;
>> +
>> + return 0;
>> +}
>> +
>> COBALT_SYSCALL32emu(monitor_wait, nonrestartable,
>> (struct cobalt_monitor_shadow __user *u_mon,
>> int event, const struct old_timespec32 __user *u_ts,
>> diff --git a/kernel/cobalt/thread.c b/kernel/cobalt/thread.c
>> index 41804b24f..71f97c481 100644
>> --- a/kernel/cobalt/thread.c
>> +++ b/kernel/cobalt/thread.c
>> @@ -25,6 +25,7 @@
>> #include <linux/signal.h>
>> #include <linux/pid.h>
>> #include <linux/sched.h>
>> +#include <asm/sighandling.h>
>> #include <uapi/linux/sched/types.h>
>> #include <cobalt/kernel/sched.h>
>> #include <cobalt/kernel/timer.h>
>> @@ -43,6 +44,7 @@
>> #include <pipeline/inband_work.h>
>> #include <pipeline/sched.h>
>> #include <trace/events/cobalt-core.h>
>> +#include "posix/process.h"
>> #include "debug.h"
>>
>> static DECLARE_WAIT_QUEUE_HEAD(join_all);
>> @@ -2520,6 +2522,43 @@ int xnthread_killall(int grace, int mask)
>> }
>> EXPORT_SYMBOL_GPL(xnthread_killall);
>>
>> +int xnthread_handle_rt_signals(unsigned int trapnr, struct pt_regs *regs)
>> +{
>> + struct ksignal ksig;
>> +
>> + unsigned int vector = trapnr;
>> + unsigned int code = xnarch_fault_code(regs);
>> + struct cobalt_ppd *sys_ppd;
>> + int sig, ret = 0;
>> + struct kernel_siginfo si;
>> +
>> + code = xnarch_fault_code(regs);
>> + ret = xnarch_setup_trap_info(vector, regs, code, &sig, &si);
>> + if (ret || sig == 0)
>> + return 1;
>> +
>> + sys_ppd = cobalt_ppd_get(0);
>> + if (sig >= _NSIG ||
>> + sys_ppd->sighand[sig] == NULL ||
>> + sys_ppd->sighand[sig] == SIG_DFL)
>> + return 1;
>> +
>> + if (sys_ppd->sigrestorer == NULL)
>> + return 1;
>> +
>> + ksig.sig = sig;
>> + memcpy(&ksig.info, &si, sizeof(si));
>> + ksig.ka.sa.sa_flags = SA_SIGINFO | SA_RESTORER;
>> + ksig.ka.sa.sa_restorer = sys_ppd->sigrestorer;
>> + ksig.ka.sa.sa_handler = sys_ppd->sighand[sig];
>> +
>> + ret = dovetail_setup_rt_signal_frame(&ksig, regs);
>> + if (ret)
>> + return 1;
>> +
>> + return 0;
>> +}
>> +
>> /* Xenomai's generic personality. */
>> struct xnthread_personality xenomai_personality = {
>> .name = "core",
>> diff --git a/lib/cobalt/arch/x86/Makefile.am b/lib/cobalt/arch/x86/Makefile.am
>> index a5095be3d..14f5eff97 100644
>> --- a/lib/cobalt/arch/x86/Makefile.am
>> +++ b/lib/cobalt/arch/x86/Makefile.am
>> @@ -2,7 +2,7 @@ noinst_LTLIBRARIES = libarch.la
>>
>> libarch_la_LDFLAGS = @XENO_LIB_LDFLAGS@
>>
>> -libarch_la_SOURCES = features.c
>> +libarch_la_SOURCES = features.c sigreturn.c
>>
>> libarch_la_CPPFLAGS = \
>> @XENO_COBALT_CFLAGS@ \
>> diff --git a/lib/cobalt/arch/x86/sigreturn.c b/lib/cobalt/arch/x86/sigreturn.c
>> new file mode 100644
>> index 000000000..76292e145
>> --- /dev/null
>> +++ b/lib/cobalt/arch/x86/sigreturn.c
>> @@ -0,0 +1,32 @@
>> +#include <cobalt/uapi/syscall.h>
>> +#include "internal.h"
>> +
>> +extern void cobalt_sigreturn (void) asm ("__cobalt_sigreturn") __attribute__
>> ((visibility ("hidden")));
>> +
>> +#ifdef __x86_64__
>> +#define build_restorer(syscall_number) \
>> + asm(".text\n" \
>> + " .align 16\n" \
>> + "__cobalt_sigreturn:\n" \
>> + " movq $ " #syscall_number ", %rax\n" \
>> + " syscall")
>> +#endif
>> +
>> +#ifdef __i386__
>> +#define build_restorer(syscall_number) \
>> + asm(".text\n" \
>> + " .align 16\n" \
>> + "__cobalt_sigreturn:\n" \
>> + " movl $ " #syscall_number ", %eax\n" \
>> + " int $0x80")
>> +#endif
>> +
>> +/*
>> + * __COBALT_SYSCALL_BIT | sc_cobalt_sigreturn
>> + */
>> +build_restorer(0x10000078);
>> +
>> +void *cobalt_get_restorer(void)
>> +{
>> + return &cobalt_sigreturn;
>> +}
>> diff --git a/lib/cobalt/internal.h b/lib/cobalt/internal.h
>> index acb3989f1..4782d154a 100644
>> --- a/lib/cobalt/internal.h
>> +++ b/lib/cobalt/internal.h
>> @@ -132,4 +132,6 @@ static inline bool cobalt_features_available(unsigned int
>> feat_mask)
>> return (cobalt_features & feat_mask) == feat_mask;
>> }
>>
>> +extern void *cobalt_get_restorer(void);
>> +
>> #endif /* _LIB_COBALT_INTERNAL_H */
>> diff --git a/lib/cobalt/signal.c b/lib/cobalt/signal.c
>> index 40d315ebb..af174d570 100644
>> --- a/lib/cobalt/signal.c
>> +++ b/lib/cobalt/signal.c
>> @@ -126,3 +126,16 @@ COBALT_IMPL(int, sigqueue, (pid_t pid, int sig, const
>> union sigval value))
>>
>> return 0;
>> }
>> +
>> +int cobalt_rt_signal(int sig, void (*handler)(int, siginfo_t *, void *))
>> +{
>> + int ret;
>> +
>> + ret = XENOMAI_SYSCALL3(sc_cobalt_sigaction, sig, handler,
>> cobalt_get_restorer());
>> + if (ret) {
>> + errno = -ret;
>> + return -1;
>> + }
>> +
>> + return 0;
>> +}
>> --
>> 2.25.1
>
next prev parent reply other threads:[~2023-08-09 9:50 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-05-09 13:13 [PATCH 1/3] [POC] test implementaion of rt-signals Johannes Kirchmair
2023-05-09 13:13 ` [PATCH 2/3] [POC] Add rt_signal test Johannes Kirchmair
2023-05-09 13:13 ` [PATCH 3/3] [POC] add a tool to measure rt_signal latency Johannes Kirchmair
2023-05-09 13:17 ` [PATCH 1/3] [POC] test implementaion of rt-signals Johannes Kirchmair
2023-05-12 17:38 ` Jan Kiszka
2023-05-15 6:50 ` Johannes Kirchmair
2023-05-15 10:38 ` Jan Kiszka
2023-05-16 6:46 ` Johannes Kirchmair
2023-05-16 6:52 ` Jan Kiszka
2023-08-09 9:50 ` Schaffner, Tobias [this message]
-- strict thread matches above, loose matches on Subject: below --
2023-08-16 10:18 Johannes Kirchmair
2023-08-16 11:24 ` Florian Bezdeka
2023-08-16 11:36 ` Jan Kiszka
2023-08-16 11:59 ` Johannes Kirchmair
2023-09-07 10:48 ` Johannes Kirchmair
2023-09-11 8:41 ` Florian Bezdeka
2023-09-01 12:00 ` Jan Kiszka
2023-09-01 13:38 ` Jan Kiszka
2023-09-04 6:55 ` Johannes Kirchmair
2023-09-07 13:39 ` Jan Kiszka
2023-09-07 13:58 ` Johannes Kirchmair
2023-09-01 13:51 ` Jan Kiszka
2023-09-01 14:11 ` Jan Kiszka
2023-09-04 7:04 ` Johannes Kirchmair
2024-03-05 15:54 ` Richard Weinberger
2024-03-05 17:05 ` Jan Kiszka
2024-03-05 17:14 ` Richard Weinberger
2023-09-08 10:50 Johannes Kirchmair
2023-09-08 10:54 ` Johannes Kirchmair
2023-09-09 11:35 ` Jan Kiszka
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