Does anyone have latency tests for the BB with RT-PREEMPT and possibly the hard RT?
Thanks and best regards, EBo -- On Jul 11 2013 1:46 AM, Michael Haberler wrote: > heads up for beagleBone users and folks dabbling with 3.8-based > kernels (most likely for ARM platforms): > > this patch seems to fit the current 3.8-based BeagleBone kernels, > meaning it should be possible to create an RT-PREEMPT kernel for the > BB > > - Michael > > > Anfang der weitergeleiteten Nachricht: > >> Von: Sebastian Andrzej Siewior <[email protected]> >> Betreff: [ANNOUNCE] 3.8.13-rt14 >> Datum: 11. Juli 2013 09:38:58 MESZ >> An: linux-rt-users <[email protected]> >> Kopie: LKML <[email protected]>, Thomas Gleixner >> <[email protected]>, [email protected], John Kacur >> <[email protected]> >> >> Dear RT Folks, >> >> I'm pleased to announce the 3.8.13-rt14 release. >> >> changes since v3.8.13-rt13: >> - added a patch from Uwe Kleine-König to fix the UP breakage >> introduced by >> the recent s/sbin spinlocks/raw_spin_lock/ change. >> - added a fix for a livelock of workqueue vs ata-piix. Found by >> Carsten >> Emde, patch proposed by Thomas Gleixner. >> >> The delta patch against v3.8.13-rt13 is appended below and can be >> found here: >> >> >> https://www.kernel.org/pub/linux/kernel/projects/rt/3.8/incr/patch-3.8.13-rt13-rt14.patch.xz >> >> The RT patch against 3.8.13 can be found here: >> >> >> https://www.kernel.org/pub/linux/kernel/projects/rt/3.8/patch-3.8.13-rt14.patch.xz >> >> The split quilt queue is available at: >> >> >> https://www.kernel.org/pub/linux/kernel/projects/rt/3.8/patches-3.8.13-rt14.tar.xz >> >> Sebastian >> >> diff --git a/include/linux/list_bl.h b/include/linux/list_bl.h >> index ddfd46a..becd7a6 100644 >> --- a/include/linux/list_bl.h >> +++ b/include/linux/list_bl.h >> @@ -131,8 +131,10 @@ static inline void hlist_bl_lock(struct >> hlist_bl_head *b) >> bit_spin_lock(0, (unsigned long *)b); >> #else >> raw_spin_lock(&b->lock); >> +#if defined(CONFIG_SMP) || defined(CONFIG_DEBUG_SPINLOCK) >> __set_bit(0, (unsigned long *)b); >> #endif >> +#endif >> } >> >> static inline void hlist_bl_unlock(struct hlist_bl_head *b) >> @@ -140,7 +142,9 @@ static inline void hlist_bl_unlock(struct >> hlist_bl_head *b) >> #ifndef CONFIG_PREEMPT_RT_BASE >> __bit_spin_unlock(0, (unsigned long *)b); >> #else >> +#if defined(CONFIG_SMP) || defined(CONFIG_DEBUG_SPINLOCK) >> __clear_bit(0, (unsigned long *)b); >> +#endif >> raw_spin_unlock(&b->lock); >> #endif >> } >> diff --git a/kernel/workqueue.c b/kernel/workqueue.c >> index 0d49ddf..99855b3 100644 >> --- a/kernel/workqueue.c >> +++ b/kernel/workqueue.c >> @@ -42,6 +42,7 @@ >> #include <linux/lockdep.h> >> #include <linux/idr.h> >> #include <linux/locallock.h> >> +#include <linux/delay.h> >> >> #include "workqueue_sched.h" >> >> @@ -1157,7 +1158,7 @@ static int try_to_grab_pending(struct >> work_struct *work, bool is_dwork, >> local_unlock_irqrestore(pendingb_lock, *flags); >> if (work_is_canceling(work)) >> return -ENOENT; >> - cpu_relax(); >> + cpu_chill(); >> return -EAGAIN; >> } >> >> diff --git a/localversion-rt b/localversion-rt >> index 9f7d0bd..08b3e75 100644 >> --- a/localversion-rt >> +++ b/localversion-rt >> @@ -1 +1 @@ >> --rt13 >> +-rt14 >> -- >> To unsubscribe from this list: send the line "unsubscribe >> linux-rt-users" in >> the body of a message to [email protected] >> More majordomo info at http://vger.kernel.org/majordomo-info.html > > > > ------------------------------------------------------------------------------ > See everything from the browser to the database with AppDynamics > Get end-to-end visibility with application monitoring from > AppDynamics > Isolate bottlenecks and diagnose root cause in seconds. > Start your free trial of AppDynamics Pro today! > > http://pubads.g.doubleclick.net/gampad/clk?id=48808831&iu=/4140/ostg.clktrk > _______________________________________________ > Emc-developers mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-developers ------------------------------------------------------------------------------ See everything from the browser to the database with AppDynamics Get end-to-end visibility with application monitoring from AppDynamics Isolate bottlenecks and diagnose root cause in seconds. Start your free trial of AppDynamics Pro today! http://pubads.g.doubleclick.net/gampad/clk?id=48808831&iu=/4140/ostg.clktrk _______________________________________________ Emc-developers mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-developers
