search for: bql

...Wang wrote: >>>> On 2018/12/26 ??11:19, Michael S. Tsirkin wrote: >>>>> On Thu, Dec 06, 2018 at 04:17:36PM +0800, Jason Wang wrote: >>>>>> On 2018/12/6 ??6:54, Michael S. Tsirkin wrote: >>>>>>> When use_napi is set, let's enable BQLs. Note: some of the issues are >>>>>>> similar to wifi. It's worth considering whether something similar to >>>>>>> commit 36148c2bbfbe ("mac80211: Adjust TSQ pacing shift") might be >>>>>>> benefitial. >>>>&...

...Wang wrote: >>>> On 2018/12/26 ??11:19, Michael S. Tsirkin wrote: >>>>> On Thu, Dec 06, 2018 at 04:17:36PM +0800, Jason Wang wrote: >>>>>> On 2018/12/6 ??6:54, Michael S. Tsirkin wrote: >>>>>>> When use_napi is set, let's enable BQLs. Note: some of the issues are >>>>>>> similar to wifi. It's worth considering whether something similar to >>>>>>> commit 36148c2bbfbe ("mac80211: Adjust TSQ pacing shift") might be >>>>>>> benefitial. >>>>&...

...> >> >Anyway guest need to take some cycles to handle tx interrupts. > >> >And transaction rate does increase if we coalesces more tx interurpts. > >> >> > >> >> > >> >>It's possible that we are deferring kicks too much due to BQL. > >> >> > >> >>As an experiment: do we get any of it back if we do > >> >>- if (kick || netif_xmit_stopped(txq)) > >> >>- virtqueue_kick(sq->vq); > >> >>+ virtqueue_kick(sq->vq); > >...

...> >> >Anyway guest need to take some cycles to handle tx interrupts. > >> >And transaction rate does increase if we coalesces more tx interurpts. > >> >> > >> >> > >> >>It's possible that we are deferring kicks too much due to BQL. > >> >> > >> >>As an experiment: do we get any of it back if we do > >> >>- if (kick || netif_xmit_stopped(txq)) > >> >>- virtqueue_kick(sq->vq); > >> >>+ virtqueue_kick(sq->vq); > >...

...2018 at 06:04:53PM +0800, Jason Wang wrote: >> On 2018/12/26 ??11:22, Michael S. Tsirkin wrote: >>> On Thu, Dec 06, 2018 at 04:17:36PM +0800, Jason Wang wrote: >>>> On 2018/12/6 ??6:54, Michael S. Tsirkin wrote: >>>>> When use_napi is set, let's enable BQLs. Note: some of the issues are >>>>> similar to wifi. It's worth considering whether something similar to >>>>> commit 36148c2bbfbe ("mac80211: Adjust TSQ pacing shift") might be >>>>> benefitial. >>>> I've played a simila...

On 2018/12/26 ??11:22, Michael S. Tsirkin wrote: > On Thu, Dec 06, 2018 at 04:17:36PM +0800, Jason Wang wrote: >> On 2018/12/6 ??6:54, Michael S. Tsirkin wrote: >>> When use_napi is set, let's enable BQLs. Note: some of the issues are >>> similar to wifi. It's worth considering whether something similar to >>> commit 36148c2bbfbe ("mac80211: Adjust TSQ pacing shift") might be >>> benefitial. >> >> I've played a similar patch several days be...

On 2018/12/26 ??11:22, Michael S. Tsirkin wrote: > On Thu, Dec 06, 2018 at 04:17:36PM +0800, Jason Wang wrote: >> On 2018/12/6 ??6:54, Michael S. Tsirkin wrote: >>> When use_napi is set, let's enable BQLs. Note: some of the issues are >>> similar to wifi. It's worth considering whether something similar to >>> commit 36148c2bbfbe ("mac80211: Adjust TSQ pacing shift") might be >>> benefitial. >> >> I've played a similar patch several days be...

...;> On 2018/12/26 ??11:19, Michael S. Tsirkin wrote: >>>>>>> On Thu, Dec 06, 2018 at 04:17:36PM +0800, Jason Wang wrote: >>>>>>>> On 2018/12/6 ??6:54, Michael S. Tsirkin wrote: >>>>>>>>> When use_napi is set, let's enable BQLs. Note: some of the issues are >>>>>>>>> similar to wifi. It's worth considering whether something similar to >>>>>>>>> commit 36148c2bbfbe ("mac80211: Adjust TSQ pacing shift") might be >>>>>>>>> benef...

...;> On 2018/12/26 ??11:19, Michael S. Tsirkin wrote: >>>>>>> On Thu, Dec 06, 2018 at 04:17:36PM +0800, Jason Wang wrote: >>>>>>>> On 2018/12/6 ??6:54, Michael S. Tsirkin wrote: >>>>>>>>> When use_napi is set, let's enable BQLs. Note: some of the issues are >>>>>>>>> similar to wifi. It's worth considering whether something similar to >>>>>>>>> commit 36148c2bbfbe ("mac80211: Adjust TSQ pacing shift") might be >>>>>>>>> benef...

...On 2018/12/26 ??11:19, Michael S. Tsirkin wrote: > > > > > > On Thu, Dec 06, 2018 at 04:17:36PM +0800, Jason Wang wrote: > > > > > > > On 2018/12/6 ??6:54, Michael S. Tsirkin wrote: > > > > > > > > When use_napi is set, let's enable BQLs. Note: some of the issues are > > > > > > > > similar to wifi. It's worth considering whether something similar to > > > > > > > > commit 36148c2bbfbe ("mac80211: Adjust TSQ pacing shift") might be > > > > > > > &...

...gt; >>hurt transaction rate? > > > >Anyway guest need to take some cycles to handle tx interrupts. > >And transaction rate does increase if we coalesces more tx interurpts. > >> > >> > >>It's possible that we are deferring kicks too much due to BQL. > >> > >>As an experiment: do we get any of it back if we do > >>- if (kick || netif_xmit_stopped(txq)) > >>- virtqueue_kick(sq->vq); > >>+ virtqueue_kick(sq->vq); > >>? > > > > > >I will try...

...gt; >>hurt transaction rate? > > > >Anyway guest need to take some cycles to handle tx interrupts. > >And transaction rate does increase if we coalesces more tx interurpts. > >> > >> > >>It's possible that we are deferring kicks too much due to BQL. > >> > >>As an experiment: do we get any of it back if we do > >>- if (kick || netif_xmit_stopped(txq)) > >>- virtqueue_kick(sq->vq); > >>+ virtqueue_kick(sq->vq); > >>? > > > > > >I will try...

...yway guest need to take some cycles to handle tx interrupts. > > >> >And transaction rate does increase if we coalesces more tx interurpts. > > >> >> > > >> >> > > >> >>It's possible that we are deferring kicks too much due to BQL. > > >> >> > > >> >>As an experiment: do we get any of it back if we do > > >> >>- if (kick || netif_xmit_stopped(txq)) > > >> >>- virtqueue_kick(sq->vq); > > >> >>+ virtqueue_k...

...2018 at 06:00:36PM +0800, Jason Wang wrote: >> On 2018/12/26 ??11:19, Michael S. Tsirkin wrote: >>> On Thu, Dec 06, 2018 at 04:17:36PM +0800, Jason Wang wrote: >>>> On 2018/12/6 ??6:54, Michael S. Tsirkin wrote: >>>>> When use_napi is set, let's enable BQLs. Note: some of the issues are >>>>> similar to wifi. It's worth considering whether something similar to >>>>> commit 36148c2bbfbe ("mac80211: Adjust TSQ pacing shift") might be >>>>> benefitial. >>>> I've played a simila...

...2018 at 06:00:36PM +0800, Jason Wang wrote: >> On 2018/12/26 ??11:19, Michael S. Tsirkin wrote: >>> On Thu, Dec 06, 2018 at 04:17:36PM +0800, Jason Wang wrote: >>>> On 2018/12/6 ??6:54, Michael S. Tsirkin wrote: >>>>> When use_napi is set, let's enable BQLs. Note: some of the issues are >>>>> similar to wifi. It's worth considering whether something similar to >>>>> commit 36148c2bbfbe ("mac80211: Adjust TSQ pacing shift") might be >>>>> benefitial. >>>> I've played a simila...

...S. Tsirkin wrote: > > > > > > > > On Thu, Dec 06, 2018 at 04:17:36PM +0800, Jason Wang wrote: > > > > > > > > > On 2018/12/6 ??6:54, Michael S. Tsirkin wrote: > > > > > > > > > > When use_napi is set, let's enable BQLs. Note: some of the issues are > > > > > > > > > > similar to wifi. It's worth considering whether something similar to > > > > > > > > > > commit 36148c2bbfbe ("mac80211: Adjust TSQ pacing shift") might be > > > &...

...27, 2018 at 06:04:53PM +0800, Jason Wang wrote: > > On 2018/12/26 ??11:22, Michael S. Tsirkin wrote: > > On Thu, Dec 06, 2018 at 04:17:36PM +0800, Jason Wang wrote: > > > On 2018/12/6 ??6:54, Michael S. Tsirkin wrote: > > > > When use_napi is set, let's enable BQLs. Note: some of the issues are > > > > similar to wifi. It's worth considering whether something similar to > > > > commit 36148c2bbfbe ("mac80211: Adjust TSQ pacing shift") might be > > > > benefitial. > > > > > > I've play...

On 2018/12/26 ??11:19, Michael S. Tsirkin wrote: > On Thu, Dec 06, 2018 at 04:17:36PM +0800, Jason Wang wrote: >> On 2018/12/6 ??6:54, Michael S. Tsirkin wrote: >>> When use_napi is set, let's enable BQLs. Note: some of the issues are >>> similar to wifi. It's worth considering whether something similar to >>> commit 36148c2bbfbe ("mac80211: Adjust TSQ pacing shift") might be >>> benefitial. >> >> I've played a similar patch several days be...

On 2018/12/26 ??11:19, Michael S. Tsirkin wrote: > On Thu, Dec 06, 2018 at 04:17:36PM +0800, Jason Wang wrote: >> On 2018/12/6 ??6:54, Michael S. Tsirkin wrote: >>> When use_napi is set, let's enable BQLs. Note: some of the issues are >>> similar to wifi. It's worth considering whether something similar to >>> commit 36148c2bbfbe ("mac80211: Adjust TSQ pacing shift") might be >>> benefitial. >> >> I've played a similar patch several days be...

...27, 2018 at 06:00:36PM +0800, Jason Wang wrote: > > On 2018/12/26 ??11:19, Michael S. Tsirkin wrote: > > On Thu, Dec 06, 2018 at 04:17:36PM +0800, Jason Wang wrote: > > > On 2018/12/6 ??6:54, Michael S. Tsirkin wrote: > > > > When use_napi is set, let's enable BQLs. Note: some of the issues are > > > > similar to wifi. It's worth considering whether something similar to > > > > commit 36148c2bbfbe ("mac80211: Adjust TSQ pacing shift") might be > > > > benefitial. > > > > > > I've play...