> Datum: 29/10/07 02:09 PM > Van: "Steven Rostedt" > Aan: "Gerrit Binnenmars" > CC: linux-rt-users@xxxxxxxxxxxxxxx > Onderwerp : Re: CONFIG_CRITICAL_IRQSOFF_TIMING > > > -- > On Sun, 28 Oct 2007, Gerrit Binnenmars wrote: > > > Hello, > > > > Can someone send me a .config file that shows the options needed to get the interrupt off > > timing values in preempt_max_latency, please. I only see a value of 0 in this file > > I am using kernel 2.6.22.1 with the corresponding rt patch. > > > > Thanks in advance, > > Make sure you have event trace and latency tracing as well as > "Interrupts-off critical section latency timing". > > Then you need to echo 0 > /proc/sys/kernel/preempt_max_latency. > Hello Steve, Thanks for your quick response, but the preempt_max_latency remains 0. Also the latency_hist shows no samples taken. Can you or someone else have a look at the corresponding CONFIG options? CONFIG_LTT_PROBE_LOCKING=m # CONFIG_LTT_PROBE_STACK is not set # # Kernel hacking # CONFIG_TRACE_IRQFLAGS_SUPPORT=y # CONFIG_PRINTK_TIME is not set CONFIG_ENABLE_MUST_CHECK=y CONFIG_MAGIC_SYSRQ=y CONFIG_UNUSED_SYMBOLS=y CONFIG_DEBUG_FS=y # CONFIG_HEADERS_CHECK is not set CONFIG_DEBUG_KERNEL=y # CONFIG_DEBUG_SHIRQ is not set CONFIG_DETECT_SOFTLOCKUP=y CONFIG_SCHED_DEBUG=y # CONFIG_SCHEDSTATS is not set # CONFIG_TIMER_STATS is not set # CONFIG_DEBUG_SLAB is not set CONFIG_DEBUG_PREEMPT=y # CONFIG_DEBUG_RT_MUTEXES is not set # CONFIG_RT_MUTEX_TESTER is not set CONFIG_DEBUG_SPINLOCK=y CONFIG_DEBUG_MUTEXES=y CONFIG_DEBUG_LOCK_ALLOC=y # CONFIG_PROVE_LOCKING is not set CONFIG_LOCKDEP=y # CONFIG_LOCK_STAT is not set # CONFIG_DEBUG_LOCKDEP is not set CONFIG_TRACE_IRQFLAGS=y # CONFIG_DEBUG_SPINLOCK_SLEEP is not set # CONFIG_DEBUG_LOCKING_API_SELFTESTS is not set CONFIG_STACKTRACE=y CONFIG_PREEMPT_TRACE=y CONFIG_EVENT_TRACE=y CONFIG_FUNCTION_TRACE=y # CONFIG_WAKEUP_TIMING is not set CONFIG_LATENCY_TRACE=y # CONFIG_CRITICAL_PREEMPT_TIMING is not set CONFIG_CRITICAL_IRQSOFF_TIMING=y CONFIG_INTERRUPT_OFF_HIST=y CONFIG_CRITICAL_TIMING=y CONFIG_DEBUG_TRACE_IRQFLAGS=y CONFIG_LATENCY_TIMING=y CONFIG_CRITICAL_LATENCY_HIST=y CONFIG_LATENCY_HIST=y CONFIG_MCOUNT=y # CONFIG_DEBUG_KOBJECT is not set # CONFIG_DEBUG_HIGHMEM is not set CONFIG_DEBUG_BUGVERBOSE=y # CONFIG_DEBUG_INFO is not set # CONFIG_DEBUG_VM is not set # CONFIG_DEBUG_LIST is not set CONFIG_FRAME_POINTER=y CONFIG_FORCED_INLINING=y # CONFIG_RCU_TORTURE_TEST is not set # CONFIG_LKDTM is not set # CONFIG_FAULT_INJECTION is not set CONFIG_EARLY_PRINTK=y # CONFIG_DEBUG_STACKOVERFLOW is not set # CONFIG_DEBUG_STACK_USAGE is not set CONFIG_DEBUG_RODATA=y CONFIG_4KSTACKS=y CONFIG_X86_FIND_SMP_CONFIG=y CONFIG_X86_MPPARSE=y CONFIG_DOUBLEFAULT=y Greetings Gerrit > -- Steve > > - > To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html > > - To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
