Felipe Ferreri Tonello wrote:
> One thing to consider is that the ALSA rawmidi device buffer is
> sequential and our USB request buffer is not. This means that our 32
> (qlen) * 256 (buflen) = 8KB of data is non-linear. Some requests might
> have 3 or 4 bytes (average size of a normal MIDI
Hi Clemens
On 27/11/15 09:05, Clemens Ladisch wrote:
> Felipe Ferreri Tonello wrote:
>> On 13/11/15 08:55, Clemens Ladisch wrote:
>>> Felipe F. Tonello wrote:
+static void f_midi_transmit(struct f_midi *midi)
+{
+...
+ len = kfifo_peek(>in_req_fifo, );
+
Felipe Ferreri Tonello wrote:
> On 13/11/15 08:55, Clemens Ladisch wrote:
>> Felipe F. Tonello wrote:
>>> +static void f_midi_transmit(struct f_midi *midi)
>>> +{
>>> +...
>>> + len = kfifo_peek(>in_req_fifo, );
>>> + ...
>>> + if (req->length > 0) {
>>> +
Hi Clemens
On 27/11/15 09:05, Clemens Ladisch wrote:
> Felipe Ferreri Tonello wrote:
>> On 13/11/15 08:55, Clemens Ladisch wrote:
>>> Felipe F. Tonello wrote:
+static void f_midi_transmit(struct f_midi *midi)
+{
+...
+ len = kfifo_peek(>in_req_fifo, );
+
Felipe Ferreri Tonello wrote:
> One thing to consider is that the ALSA rawmidi device buffer is
> sequential and our USB request buffer is not. This means that our 32
> (qlen) * 256 (buflen) = 8KB of data is non-linear. Some requests might
> have 3 or 4 bytes (average size of a normal MIDI
Felipe Ferreri Tonello wrote:
> On 13/11/15 08:55, Clemens Ladisch wrote:
>> Felipe F. Tonello wrote:
>>> +static void f_midi_transmit(struct f_midi *midi)
>>> +{
>>> +...
>>> + len = kfifo_peek(>in_req_fifo, );
>>> + ...
>>> + if (req->length > 0) {
>>> +
Hi Clemens
On 13/11/15 08:55, Clemens Ladisch wrote:
> Felipe F. Tonello wrote:
>> This patch introduces pre-allocation of IN endpoint USB requests. This
>> improves on latency (requires no usb request allocation on transmit) and
>> avoid
>> several potential probles on allocating too many usb
Hi Robert,
On 13/11/15 12:38, Robert Baldyga wrote:
> Hi Felipe,
>
> On 11/10/2015 06:52 PM, Felipe F. Tonello wrote:
>> This patch introduces pre-allocation of IN endpoint USB requests. This
>> improves on latency (requires no usb request allocation on transmit) and
>> avoid
>> several
Hi Robert,
On 13/11/15 12:38, Robert Baldyga wrote:
> Hi Felipe,
>
> On 11/10/2015 06:52 PM, Felipe F. Tonello wrote:
>> This patch introduces pre-allocation of IN endpoint USB requests. This
>> improves on latency (requires no usb request allocation on transmit) and
>> avoid
>> several
Hi Clemens
On 13/11/15 08:55, Clemens Ladisch wrote:
> Felipe F. Tonello wrote:
>> This patch introduces pre-allocation of IN endpoint USB requests. This
>> improves on latency (requires no usb request allocation on transmit) and
>> avoid
>> several potential probles on allocating too many usb
Hi Felipe,
On 11/10/2015 06:52 PM, Felipe F. Tonello wrote:
> This patch introduces pre-allocation of IN endpoint USB requests. This
> improves on latency (requires no usb request allocation on transmit) and avoid
> several potential probles on allocating too many usb requests (which involves
>
Felipe F. Tonello wrote:
> This patch introduces pre-allocation of IN endpoint USB requests. This
> improves on latency (requires no usb request allocation on transmit) and avoid
> several potential probles on allocating too many usb requests (which involves
> DMA pool allocation problems).
>
>
Felipe F. Tonello wrote:
> This patch introduces pre-allocation of IN endpoint USB requests. This
> improves on latency (requires no usb request allocation on transmit) and avoid
> several potential probles on allocating too many usb requests (which involves
> DMA pool allocation problems).
>
>
Hi Felipe,
On 11/10/2015 06:52 PM, Felipe F. Tonello wrote:
> This patch introduces pre-allocation of IN endpoint USB requests. This
> improves on latency (requires no usb request allocation on transmit) and avoid
> several potential probles on allocating too many usb requests (which involves
>
This patch introduces pre-allocation of IN endpoint USB requests. This
improves on latency (requires no usb request allocation on transmit) and avoid
several potential probles on allocating too many usb requests (which involves
DMA pool allocation problems).
This implementation also handles
This patch introduces pre-allocation of IN endpoint USB requests. This
improves on latency (requires no usb request allocation on transmit) and avoid
several potential probles on allocating too many usb requests (which involves
DMA pool allocation problems).
This implementation also handles
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