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rxrpc: Record statistics about ACK types

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Record statistics about the different types of ACKs that have been
transmitted and received and the number of ACKs that have been filled out
and transmitted or that have been skipped.

Signed-off-by: David Howells <dhowells@redhat.com>
cc: Marc Dionne <marc.dionne@auristor.com>
cc: linux-afs@lists.infradead.org
This commit is contained in:
David Howells 2022-05-11 14:01:25 +01:00
parent b015424695
commit f2a676d100
5 changed files with 48 additions and 1 deletions
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6
net/rxrpc/ar-internal.h
View File

@ -101,6 +101,12 @@ struct rxrpc_net {
atomic_t stat_rx_data;
atomic_t stat_rx_data_reqack;
atomic_t stat_rx_data_jumbo;
atomic_t stat_tx_ack_fill;
atomic_t stat_tx_ack_send;
atomic_t stat_tx_ack_skip;
atomic_t stat_tx_acks[256];
atomic_t stat_rx_acks[256];
};
/*

2
net/rxrpc/call_event.c
View File

@ -50,6 +50,8 @@ static void __rxrpc_propose_ACK(struct rxrpc_call *call, u8 ack_reason,
unsigned long expiry = rxrpc_soft_ack_delay;
s8 prior = rxrpc_ack_priority[ack_reason];
rxrpc_inc_stat(call->rxnet, stat_tx_acks[ack_reason]);
/* Pings are handled specially because we don't want to accidentally
* lose a ping response by subsuming it into a ping.
*/

1
net/rxrpc/input.c
View File

@ -888,6 +888,7 @@ static void rxrpc_input_ack(struct rxrpc_call *call, struct sk_buff *skb)
trace_rxrpc_rx_ack(call, ack_serial, acked_serial,
first_soft_ack, prev_pkt,
summary.ack_reason, nr_acks);
rxrpc_inc_stat(call->rxnet, stat_rx_acks[buf.ack.reason]);
switch (buf.ack.reason) {
case RXRPC_ACK_PING_RESPONSE:

7
net/rxrpc/output.c
View File

@ -83,8 +83,12 @@ static size_t rxrpc_fill_out_ack(struct rxrpc_connection *conn,
tmp = atomic_xchg(&call->ackr_nr_unacked, 0);
tmp |= atomic_xchg(&call->ackr_nr_consumed, 0);
if (!tmp && (reason == RXRPC_ACK_DELAY ||
reason == RXRPC_ACK_IDLE))
reason == RXRPC_ACK_IDLE)) {
rxrpc_inc_stat(call->rxnet, stat_tx_ack_skip);
return 0;
}
rxrpc_inc_stat(call->rxnet, stat_tx_ack_fill);
/* Barrier against rxrpc_input_data(). */
serial = call->ackr_serial;
@ -253,6 +257,7 @@ int rxrpc_send_ack_packet(struct rxrpc_call *call, bool ping,
if (ping)
rtt_slot = rxrpc_begin_rtt_probe(call, serial, rxrpc_rtt_tx_ping);
rxrpc_inc_stat(call->rxnet, stat_tx_ack_send);
ret = kernel_sendmsg(conn->params.local->socket, &msg, iov, 2, len);
conn->params.peer->last_tx_at = ktime_get_seconds();
if (ret < 0)

33
net/rxrpc/proc.c
View File

@ -418,6 +418,33 @@ int rxrpc_stats_show(struct seq_file *seq, void *v)
atomic_read(&rxnet->stat_rx_data),
atomic_read(&rxnet->stat_rx_data_reqack),
atomic_read(&rxnet->stat_rx_data_jumbo));
seq_printf(seq,
"Ack : fill=%u send=%u skip=%u\n",
atomic_read(&rxnet->stat_tx_ack_fill),
atomic_read(&rxnet->stat_tx_ack_send),
atomic_read(&rxnet->stat_tx_ack_skip));
seq_printf(seq,
"Ack-Tx : req=%u dup=%u oos=%u exw=%u nos=%u png=%u prs=%u dly=%u idl=%u\n",
atomic_read(&rxnet->stat_tx_acks[RXRPC_ACK_REQUESTED]),
atomic_read(&rxnet->stat_tx_acks[RXRPC_ACK_DUPLICATE]),
atomic_read(&rxnet->stat_tx_acks[RXRPC_ACK_OUT_OF_SEQUENCE]),
atomic_read(&rxnet->stat_tx_acks[RXRPC_ACK_EXCEEDS_WINDOW]),
atomic_read(&rxnet->stat_tx_acks[RXRPC_ACK_NOSPACE]),
atomic_read(&rxnet->stat_tx_acks[RXRPC_ACK_PING]),
atomic_read(&rxnet->stat_tx_acks[RXRPC_ACK_PING_RESPONSE]),
atomic_read(&rxnet->stat_tx_acks[RXRPC_ACK_DELAY]),
atomic_read(&rxnet->stat_tx_acks[RXRPC_ACK_IDLE]));
seq_printf(seq,
"Ack-Rx : req=%u dup=%u oos=%u exw=%u nos=%u png=%u prs=%u dly=%u idl=%u\n",
atomic_read(&rxnet->stat_rx_acks[RXRPC_ACK_REQUESTED]),
atomic_read(&rxnet->stat_rx_acks[RXRPC_ACK_DUPLICATE]),
atomic_read(&rxnet->stat_rx_acks[RXRPC_ACK_OUT_OF_SEQUENCE]),
atomic_read(&rxnet->stat_rx_acks[RXRPC_ACK_EXCEEDS_WINDOW]),
atomic_read(&rxnet->stat_rx_acks[RXRPC_ACK_NOSPACE]),
atomic_read(&rxnet->stat_rx_acks[RXRPC_ACK_PING]),
atomic_read(&rxnet->stat_rx_acks[RXRPC_ACK_PING_RESPONSE]),
atomic_read(&rxnet->stat_rx_acks[RXRPC_ACK_DELAY]),
atomic_read(&rxnet->stat_rx_acks[RXRPC_ACK_IDLE]));
seq_printf(seq,
"Buffers : txb=%u rxb=%u\n",
atomic_read(&rxrpc_n_tx_skbs),
@ -443,5 +470,11 @@ int rxrpc_stats_clear(struct file *file, char *buf, size_t size)
atomic_set(&rxnet->stat_rx_data, 0);
atomic_set(&rxnet->stat_rx_data_reqack, 0);
atomic_set(&rxnet->stat_rx_data_jumbo, 0);
atomic_set(&rxnet->stat_tx_ack_fill, 0);
atomic_set(&rxnet->stat_tx_ack_send, 0);
atomic_set(&rxnet->stat_tx_ack_skip, 0);
memset(&rxnet->stat_tx_acks, 0, sizeof(rxnet->stat_tx_acks));
memset(&rxnet->stat_rx_acks, 0, sizeof(rxnet->stat_rx_acks));
return size;
}