On 7/20/2017 4:48 PM, Yongseok Koh wrote:
> mlx5_tx_complete() polls completion queue multiple times until it
> encounters an invalid entry. As Tx completions are suppressed by
> MLX5_TX_COMP_THRESH, it is waste of cycles to expect multiple completions
> in a poll. And freeing too many buffers in a
> On Jul 27, 2017, at 4:12 AM, Sagi Grimberg wrote:
>
>
>>> Yes I realize that, but can't the device still complete in a burst (of
>>> unsuppressed completions)? I mean its not guaranteed that for every
>>> txq_complete a signaled completion is pending right? What happens if
>>> the device has
Yes I realize that, but can't the device still complete in a burst (of
unsuppressed completions)? I mean its not guaranteed that for every
txq_complete a signaled completion is pending right? What happens if
the device has inconsistent completion pacing? Can't the sw grow a
batch of completions
On Sun, Jul 23, 2017 at 12:49:36PM +0300, Sagi Grimberg wrote:
> > > > mlx5_tx_complete() polls completion queue multiple times until it
> > > > encounters an invalid entry. As Tx completions are suppressed by
> > > > MLX5_TX_COMP_THRESH, it is waste of cycles to expect multiple
> > > > completion
mlx5_tx_complete() polls completion queue multiple times until it
encounters an invalid entry. As Tx completions are suppressed by
MLX5_TX_COMP_THRESH, it is waste of cycles to expect multiple completions
in a poll. And freeing too many buffers in a call can cause high jitter.
This patch improves
On Thu, Jul 20, 2017 at 07:34:04PM +0300, Sagi Grimberg wrote:
>
> > mlx5_tx_complete() polls completion queue multiple times until it
> > encounters an invalid entry. As Tx completions are suppressed by
> > MLX5_TX_COMP_THRESH, it is waste of cycles to expect multiple completions
> > in a poll. A
mlx5_tx_complete() polls completion queue multiple times until it
encounters an invalid entry. As Tx completions are suppressed by
MLX5_TX_COMP_THRESH, it is waste of cycles to expect multiple completions
in a poll. And freeing too many buffers in a call can cause high jitter.
This patch improve
mlx5_tx_complete() polls completion queue multiple times until it
encounters an invalid entry. As Tx completions are suppressed by
MLX5_TX_COMP_THRESH, it is waste of cycles to expect multiple completions
in a poll. And freeing too many buffers in a call can cause high jitter.
This patch improves t
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