You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
78 lines
2.8 KiB
78 lines
2.8 KiB
19 years ago
|
/*
|
||
|
|
* linux/include/linux/sunrpc/metrics.h
|
||
|
|
*
|
||
|
|
* Declarations for RPC client per-operation metrics
|
||
|
|
*
|
||
|
|
* Copyright (C) 2005 Chuck Lever <cel@netapp.com>
|
||
|
|
*
|
||
|
|
* RPC client per-operation statistics provide latency and retry
|
||
|
|
* information about each type of RPC procedure in a given RPC program.
|
||
|
|
* These statistics are not for detailed problem diagnosis, but simply
|
||
|
|
* to indicate whether the problem is local or remote.
|
||
|
|
*
|
||
|
|
* These counters are not meant to be human-readable, but are meant to be
|
||
|
|
* integrated into system monitoring tools such as "sar" and "iostat". As
|
||
|
|
* such, the counters are sampled by the tools over time, and are never
|
||
|
|
* zeroed after a file system is mounted. Moving averages can be computed
|
||
|
|
* by the tools by taking the difference between two instantaneous samples
|
||
|
|
* and dividing that by the time between the samples.
|
||
|
|
*
|
||
|
|
* The counters are maintained in a single array per RPC client, indexed
|
||
|
|
* by procedure number. There is no need to maintain separate counter
|
||
|
|
* arrays per-CPU because these counters are always modified behind locks.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef _LINUX_SUNRPC_METRICS_H
|
||
|
|
#define _LINUX_SUNRPC_METRICS_H
|
||
|
|
|
||
|
|
#include <linux/seq_file.h>
|
||
|
|
|
||
|
|
#define RPC_IOSTATS_VERS "1.0"
|
||
|
|
|
||
|
|
struct rpc_iostats {
|
||
|
|
/*
|
||
|
|
* These counters give an idea about how many request
|
||
|
|
* transmissions are required, on average, to complete that
|
||
|
|
* particular procedure. Some procedures may require more
|
||
|
|
* than one transmission because the server is unresponsive,
|
||
|
|
* the client is retransmitting too aggressively, or the
|
||
|
|
* requests are large and the network is congested.
|
||
|
|
*/
|
||
|
|
unsigned long om_ops, /* count of operations */
|
||
|
|
om_ntrans, /* count of RPC transmissions */
|
||
|
|
om_timeouts; /* count of major timeouts */
|
||
|
|
|
||
|
|
/*
|
||
|
|
* These count how many bytes are sent and received for a
|
||
|
|
* given RPC procedure type. This indicates how much load a
|
||
|
|
* particular procedure is putting on the network. These
|
||
|
|
* counts include the RPC and ULP headers, and the request
|
||
|
|
* payload.
|
||
|
|
*/
|
||
|
|
unsigned long long om_bytes_sent, /* count of bytes out */
|
||
|
|
om_bytes_recv; /* count of bytes in */
|
||
|
|
|
||
|
|
/*
|
||
|
|
* The length of time an RPC request waits in queue before
|
||
|
|
* transmission, the network + server latency of the request,
|
||
|
|
* and the total time the request spent from init to release
|
||
|
|
* are measured.
|
||
|
|
*/
|
||
|
|
unsigned long long om_queue, /* jiffies queued for xmit */
|
||
|
|
om_rtt, /* jiffies for RPC RTT */
|
||
|
|
om_execute; /* jiffies for RPC execution */
|
||
|
|
} ____cacheline_aligned;
|
||
|
|
|
||
|
|
struct rpc_task;
|
||
|
|
struct rpc_clnt;
|
||
|
|
|
||
|
|
/*
|
||
|
|
* EXPORTed functions for managing rpc_iostats structures
|
||
|
|
*/
|
||
|
|
struct rpc_iostats * rpc_alloc_iostats(struct rpc_clnt *);
|
||
|
|
void rpc_count_iostats(struct rpc_task *);
|
||
|
|
void rpc_print_iostats(struct seq_file *, struct rpc_clnt *);
|
||
|
|
void rpc_free_iostats(struct rpc_iostats *);
|
||
|
|
|
||
|
|
#endif /* _LINUX_SUNRPC_METRICS_H */
|