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/*
* GFS2 latency metrics.
*
* Copyright (c) 2014 Red Hat.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details.
*/
#ifndef LATENCY_H
#define LATENCY_H
#define DEFAULT_LATENCY_STATE 1
#define NUM_LATENCY_VALUES 512
enum{
START = 0,
END
};
enum {
LATENCY_GRANT_ALL = 0,
LATENCY_GRANT_NL,
LATENCY_GRANT_CR,
LATENCY_GRANT_CW,
LATENCY_GRANT_PR,
LATENCY_GRANT_PW,
LATENCY_GRANT_EX,
LATENCY_DEMOTE_ALL,
LATENCY_DEMOTE_NL,
LATENCY_DEMOTE_CR,
LATENCY_DEMOTE_CW,
LATENCY_DEMOTE_PR,
LATENCY_DEMOTE_PW,
LATENCY_DEMOTE_EX,
LATENCY_QUEUE_ALL,
LATENCY_QUEUE_NL,
LATENCY_QUEUE_CR,
LATENCY_QUEUE_CW,
LATENCY_QUEUE_PR,
LATENCY_QUEUE_PW,
LATENCY_QUEUE_EX,
NUM_LATENCY_STATS
};
struct latency_data {
uint32_t lock_type;
uint64_t number;
int64_t usecs;
};
struct latency {
struct latency_data values [NUM_LATENCY_STATS * NUM_LATENCY_VALUES * 2]; /* START and STOP values */
int counter [NUM_LATENCY_STATS];
};
extern int gfs2_latency_fetch(int, struct latency *, pmAtomValue *);
extern int gfs2_extract_latency(unsigned int, unsigned int, int, char *, pmInDom);
extern int latency_get_state();
extern int latency_set_state(pmValueSet *vsp);
#endif /* LATENCY_H */
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