On Thu, 19 Nov 2020 09:30:15 +0100 Björn Töpel wrote:
> From: Björn Töpel
>
> The existing busy-polling mode, enabled by the SO_BUSY_POLL socket
> option or system-wide using the /proc/sys/net/core/busy_read knob, is
> an opportunistic. That means that if the NAPI context is not
> scheduled, it w
On 2020-11-24 01:11, Jakub Kicinski wrote:
On Thu, 19 Nov 2020 09:30:15 +0100 Björn Töpel wrote:
@@ -105,7 +105,8 @@ static inline void sk_busy_loop(struct sock *sk, int
nonblock)
unsigned int napi_id = READ_ONCE(sk->sk_napi_id);
if (napi_id >= MIN_NAPI_ID)
- napi
On 2020-11-24 01:04, Jakub Kicinski wrote:
On Thu, 19 Nov 2020 09:30:15 +0100 Björn Töpel wrote:
+ /* The NAPI context has more processing work, but busy-polling
+* is preferred. Exit early.
+*/
+ if (napi_prefer_busy_poll(n)) {
+ if (napi_complete_done(
On Thu, 19 Nov 2020 09:30:15 +0100 Björn Töpel wrote:
> @@ -105,7 +105,8 @@ static inline void sk_busy_loop(struct sock *sk, int
> nonblock)
> unsigned int napi_id = READ_ONCE(sk->sk_napi_id);
>
> if (napi_id >= MIN_NAPI_ID)
> - napi_busy_loop(napi_id, nonblock ? NULL : s
On Thu, 19 Nov 2020 09:30:15 +0100 Björn Töpel wrote:
> + /* The NAPI context has more processing work, but busy-polling
> + * is preferred. Exit early.
> + */
> + if (napi_prefer_busy_poll(n)) {
> + if (napi_complete_done(n, work)) {
> + /* If time
From: Björn Töpel
The existing busy-polling mode, enabled by the SO_BUSY_POLL socket
option or system-wide using the /proc/sys/net/core/busy_read knob, is
an opportunistic. That means that if the NAPI context is not
scheduled, it will poll it. If, after busy-polling, the budget is
exceeded the bu
