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>
78 lines
1.9 KiB
C
78 lines
1.9 KiB
C
/*
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* FCP adapter trace utility
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*
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* Various shared utility functions and structs
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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 ZIOMON_TOOLS_H
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#define ZIOMON_TOOLS_H
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#include <byteswap.h>
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#include <endian.h>
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#include <linux/types.h>
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#define swap_64(num) (num = be64toh(num))
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#define swap_32(num) (num = be32toh(num))
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#define swap_16(num) (num = be16toh(num))
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#define verbose_msg(x...) do {\
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if (verbose)\
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printf("\t=== " x);\
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} while (0)
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#ifdef NDEBUG
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#define vverbose_msg(x...)
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#else
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#define vverbose_msg(x...) do {\
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if (verbose >= 2)\
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printf("\t=== " x);\
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} while (0)
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#endif
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/**
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* abbreviated stat (without a count).
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* Used in various places where multiple instances of stats have
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* to be collected, sharing a single count variable to save some space */
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struct abbrev_stat {
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__u64 min;
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__u64 max;
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__u64 sum;
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__u64 sos; /* sum of squares */
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} __attribute__ ((packed));
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void swap_abbrev_stat(struct abbrev_stat *var);
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void print_abbrev_stat(struct abbrev_stat *stats, __u64 count);
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void aggregate_abbrev_stat(const struct abbrev_stat *src,
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struct abbrev_stat *tgt);
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void update_abbrev_stat(struct abbrev_stat *stat, __u64 val);
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void copy_abbrev_stat(struct abbrev_stat *tgt,
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const struct abbrev_stat *src);
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/**
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* Rebase abbrev_stat structure from 'old_count' to 'new_count' number of
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* sample. Since we assume that the additional samples are all 0, we also
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* fix the respective 'min' value while at it. */
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void transform_abbrev_stat(struct abbrev_stat *stat, __u64 old_count,
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double new_count);
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void init_abbrev_stat(struct abbrev_stat *data);
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double calc_avg(__u64 sum, __u64 count);
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double calc_variance(__u64 sum, __u64 sos, __u64 count);
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double calc_std_dev(__u64 sum, __u64 sos, __u64 count);
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#endif
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