> -----Original Message----- > From: dev [mailto:dev-bounces at dpdk.org] On Behalf Of Marc Sune > Sent: Friday, February 13, 2015 10:25 PM > To: dev at dpdk.org > Subject: [dpdk-dev] [PATCH v2] Adding RTE_KNI_PREEMPT_DEFAULT > configuration option > > This patch introduces CONFIG_RTE_KNI_PREEMPT_DEFAULT flag. When set to > 'no', KNI kernel thread(s) do not call schedule_timeout_interruptible(), which > improves overall KNI performance at the expense of CPU cycles (polling). > > Default values is 'yes', maintaining the same behaviour as of now. > > v2: CONFIG_RTE_KNI_PREEMPT -> CONFIG_RTE_KNI_PREEMPT_DEFAULT > > Signed-off-by: Marc Sune <marc.sune at bisdn.de> Acked-by: Helin Zhang <helin.zhang at intel.com>
> --- > config/common_linuxapp | 1 + > lib/librte_eal/linuxapp/kni/kni_misc.c | 4 ++++ > 2 files changed, 5 insertions(+) > > diff --git a/config/common_linuxapp b/config/common_linuxapp index > d428f84..72ba6ab 100644 > --- a/config/common_linuxapp > +++ b/config/common_linuxapp > @@ -359,6 +359,7 @@ CONFIG_RTE_LIBRTE_PIPELINE=y # Compile > librte_kni # CONFIG_RTE_LIBRTE_KNI=y > +CONFIG_RTE_KNI_PREEMPT_DEFAULT=y > CONFIG_RTE_KNI_KO_DEBUG=n > CONFIG_RTE_KNI_VHOST=n > CONFIG_RTE_KNI_VHOST_MAX_CACHE_SIZE=1024 > diff --git a/lib/librte_eal/linuxapp/kni/kni_misc.c > b/lib/librte_eal/linuxapp/kni/kni_misc.c > index 868b325..1935d32 100644 > --- a/lib/librte_eal/linuxapp/kni/kni_misc.c > +++ b/lib/librte_eal/linuxapp/kni/kni_misc.c > @@ -229,9 +229,11 @@ kni_thread_single(void *unused) > } > } > up_read(&kni_list_lock); > +#ifdef RTE_KNI_PREEMPT_DEFAULT > /* reschedule out for a while */ > schedule_timeout_interruptible(usecs_to_jiffies( \ > KNI_KTHREAD_RESCHEDULE_INTERVAL)); > +#endif > } > > return 0; > @@ -252,8 +254,10 @@ kni_thread_multiple(void *param) #endif > kni_net_poll_resp(dev); > } > +#ifdef RTE_KNI_PREEMPT_DEFAULT > schedule_timeout_interruptible(usecs_to_jiffies( \ > KNI_KTHREAD_RESCHEDULE_INTERVAL)); > +#endif > } > > return 0; > -- > 2.1.4
