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rxrpc: Record stats for why the REQUEST-ACK flag is being set

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Record stats for why the REQUEST-ACK flag is being set.

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 2022-08-18 11:52:36 +01:00
parent f2a676d100
commit f7fa52421f
4 changed files with 18 additions and 0 deletions
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1
include/trace/events/rxrpc.h
View File

@ -250,6 +250,7 @@
EM(rxrpc_reqack_retrans, "RETRANS ") \
EM(rxrpc_reqack_slow_start, "SLOW-START") \
E_(rxrpc_reqack_small_txwin, "SMALL-TXWN")
/* ---- Must update size of stat_why_req_ack[] if more are added! */
/*
* Generate enums for tracing information.

2
net/rxrpc/ar-internal.h
View File

@ -107,6 +107,8 @@ struct rxrpc_net {
atomic_t stat_tx_ack_skip;
atomic_t stat_tx_acks[256];
atomic_t stat_rx_acks[256];
atomic_t stat_why_req_ack[8];
};
/*

1
net/rxrpc/output.c
View File

@ -430,6 +430,7 @@ int rxrpc_send_data_packet(struct rxrpc_call *call, struct sk_buff *skb,
else
goto dont_set_request_ack;
rxrpc_inc_stat(call->rxnet, stat_why_req_ack[why]);
trace_rxrpc_req_ack(call->debug_id, sp->hdr.seq, why);
if (why != rxrpc_reqack_no_srv_last)
whdr.flags |= RXRPC_REQUEST_ACK;

14
net/rxrpc/proc.c
View File

@ -445,6 +445,18 @@ int rxrpc_stats_show(struct seq_file *seq, void *v)
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,
"Why-Req-A: acklost=%u already=%u mrtt=%u ortt=%u\n",
atomic_read(&rxnet->stat_why_req_ack[rxrpc_reqack_ack_lost]),
atomic_read(&rxnet->stat_why_req_ack[rxrpc_reqack_already_on]),
atomic_read(&rxnet->stat_why_req_ack[rxrpc_reqack_more_rtt]),
atomic_read(&rxnet->stat_why_req_ack[rxrpc_reqack_old_rtt]));
seq_printf(seq,
"Why-Req-A: nolast=%u retx=%u slows=%u smtxw=%u\n",
atomic_read(&rxnet->stat_why_req_ack[rxrpc_reqack_no_srv_last]),
atomic_read(&rxnet->stat_why_req_ack[rxrpc_reqack_retrans]),
atomic_read(&rxnet->stat_why_req_ack[rxrpc_reqack_slow_start]),
atomic_read(&rxnet->stat_why_req_ack[rxrpc_reqack_small_txwin]));
seq_printf(seq,
"Buffers : txb=%u rxb=%u\n",
atomic_read(&rxrpc_n_tx_skbs),
@ -476,5 +488,7 @@ int rxrpc_stats_clear(struct file *file, char *buf, size_t size)
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));
memset(&rxnet->stat_why_req_ack, 0, sizeof(rxnet->stat_why_req_ack));
return size;
}