mirror of
https://github.com/ibm-s390-linux/s390-tools.git
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b627b8d8e1
This commit is based on the s390-tools-1.39.0 version. Changes on top of s390-tools-1.39.0: - Add MIT license to all source files - Add LICENSE file - Transform REAMDE to README.md (markdown) - Add AUTHORS.md file - Add CONTRIBUTING.md file - Move changelog from README to CHANGELOG.md file Reviewed-by: Stefan Haberland <sth@linux.vnet.ibm.com> Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
48 lines
1.4 KiB
C
48 lines
1.4 KiB
C
/*
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* FCP adapter trace utility
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*
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* I/O monitor based on block queue trace data
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*
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* Copyright IBM Corp. 2008, 2017
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*
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* s390-tools is free software; you can redistribute it and/or modify
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* it under the terms of the MIT license. See LICENSE for details.
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*/
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#ifndef ZFCPIOMON_H_
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#define ZFCPIOMON_H_
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#include "ziomon_tools.h"
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#define BLKIOMON_CHAN_LAT_BUCKETS 20
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#define BLKIOMON_FABR_LAT_BUCKETS 25
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struct zfcpdd_dstat {
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__u64 time;
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/* Channel latency histogram in n-secs.
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Step-size is 1000, starting at 0. */
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__u32 chan_lat_hist[BLKIOMON_CHAN_LAT_BUCKETS];
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/* fabric latency histogram in u-secs.
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Step-size is 8, starting at 0. */
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__u32 fabr_lat_hist[BLKIOMON_FABR_LAT_BUCKETS];
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struct abbrev_stat chan_lat; /* channel latency in nano-seconds
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NOTE: often rescaled to micro-seconds
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later on! */
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struct abbrev_stat fabr_lat; /* fabric latency in micro-seconds */
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struct abbrev_stat inb; /* inbound fill size */
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__u64 count; /* number of samples for abbrev_stats */
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__u32 device; /* device identifier */
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__u16 outb_max; /* max used slots in qdio outbound queue */
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} __attribute__ ((packed));
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void zfcpdd_print_stats(struct zfcpdd_dstat *stat);
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void conv_dstat_to_BE(struct zfcpdd_dstat *stat);
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void conv_dstat_from_BE(struct zfcpdd_dstat *stat);
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void aggregate_dstat(struct zfcpdd_dstat *src,
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struct zfcpdd_dstat *tgt);
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#endif /*ZFCPIOMON_H_*/
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