1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
|
/*
* FCP adapter trace utility
*
* I/O monitor based on block queue trace data
*
* Copyright IBM Corp. 2008, 2017
*
* s390-tools is free software; you can redistribute it and/or modify
* it under the terms of the MIT license. See LICENSE for details.
*/
#ifndef ZFCPIOMON_H_
#define ZFCPIOMON_H_
#include "ziomon_tools.h"
#define BLKIOMON_CHAN_LAT_BUCKETS 20
#define BLKIOMON_FABR_LAT_BUCKETS 25
struct zfcpdd_dstat {
__u64 time;
/* Channel latency histogram in n-secs.
Step-size is 1000, starting at 0. */
__u32 chan_lat_hist[BLKIOMON_CHAN_LAT_BUCKETS];
/* fabric latency histogram in u-secs.
Step-size is 8, starting at 0. */
__u32 fabr_lat_hist[BLKIOMON_FABR_LAT_BUCKETS];
struct abbrev_stat chan_lat; /* channel latency in nano-seconds
NOTE: often rescaled to micro-seconds
later on! */
struct abbrev_stat fabr_lat; /* fabric latency in micro-seconds */
struct abbrev_stat inb; /* inbound fill size */
__u64 count; /* number of samples for abbrev_stats */
__u32 device; /* device identifier */
__u16 outb_max; /* max used slots in qdio outbound queue */
} __attribute__ ((packed));
void zfcpdd_print_stats(struct zfcpdd_dstat *stat);
void conv_dstat_to_BE(struct zfcpdd_dstat *stat);
void conv_dstat_from_BE(struct zfcpdd_dstat *stat);
void aggregate_dstat(struct zfcpdd_dstat *src,
struct zfcpdd_dstat *tgt);
#endif /*ZFCPIOMON_H_*/
|