netdev - [PATCH bpf-next v3 10/10] samples/bpf: add option to set the busy-poll budget

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Message-Id: <20201119083024.119566-11-bjorn.topel@gmail.com>
Date:   Thu, 19 Nov 2020 09:30:24 +0100
From:   Björn Töpel <bjorn.topel@...il.com>
To:     netdev@...r.kernel.org, bpf@...r.kernel.org
Cc:     Björn Töpel <bjorn.topel@...el.com>,
        magnus.karlsson@...el.com, ast@...nel.org, daniel@...earbox.net,
        maciej.fijalkowski@...el.com, sridhar.samudrala@...el.com,
        jesse.brandeburg@...el.com, qi.z.zhang@...el.com, kuba@...nel.org,
        edumazet@...gle.com, jonathan.lemon@...il.com, maximmi@...dia.com
Subject: [PATCH bpf-next v3 10/10] samples/bpf: add option to set the busy-poll budget

From: Björn Töpel <bjorn.topel@...el.com>

Support for the SO_BUSY_POLL_BUDGET setsockopt, via the batching
option ('b').

Signed-off-by: Björn Töpel <bjorn.topel@...el.com>
---
 samples/bpf/xdpsock_user.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/samples/bpf/xdpsock_user.c b/samples/bpf/xdpsock_user.c
index cb1eaee8a32b..deba623e9003 100644
--- a/samples/bpf/xdpsock_user.c
+++ b/samples/bpf/xdpsock_user.c
@@ -1479,6 +1479,11 @@ static void apply_setsockopt(struct xsk_socket_info *xsk)
 	if (setsockopt(xsk_socket__fd(xsk->xsk), SOL_SOCKET, SO_BUSY_POLL,
 		       (void *)&sock_opt, sizeof(sock_opt)) < 0)
 		exit_with_error(errno);
+
+	sock_opt = opt_batch_size;
+	if (setsockopt(xsk_socket__fd(xsk->xsk), SOL_SOCKET, SO_BUSY_POLL_BUDGET,
+		       (void *)&sock_opt, sizeof(sock_opt)) < 0)
+		exit_with_error(errno);
 }
 
 int main(int argc, char **argv)
-- 
2.27.0