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>
106 lines
2.3 KiB
C
106 lines
2.3 KiB
C
/*
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* FCP adapter trace facility
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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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#include <assert.h>
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#include <math.h>
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#include <stdint.h>
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#include <stdio.h>
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#include "ziomon_tools.h"
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extern int verbose;
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void swap_abbrev_stat(struct abbrev_stat *var) {
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swap_64(var->min);
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swap_64(var->max);
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swap_64(var->sum);
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swap_64(var->sos);
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}
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double calc_avg(__u64 sum, __u64 count)
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{
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assert(count > 0);
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return (sum / (double)count);
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}
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double calc_variance(__u64 sum, __u64 sos, __u64 count)
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{
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assert(count > 0);
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return ((sos - ((sum * sum) / (double)count)) / (double)count);
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}
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double calc_std_dev(__u64 sum, __u64 sos, __u64 count)
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{
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return sqrt(calc_variance(sum, sos, count));
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}
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void transform_abbrev_stat(struct abbrev_stat *stat,
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__u64 old_count,
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double new_count)
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{
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stat->min = 0;
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stat->sum = (__u64)(calc_avg(stat->sum, old_count) * new_count);
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stat->sos = (__u64)(calc_avg(stat->sos, old_count) * new_count);
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}
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void print_abbrev_stat(struct abbrev_stat *stats, __u64 count)
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{
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printf("\t\tmin : %Lu\n", (long long)stats->min);
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printf("\t\tmax : %Lu\n", (long long)stats->max);
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vverbose_msg("\t\tsum : %Lu\n", (long long)stats->sum);
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vverbose_msg("\t\tsos : %Lu\n", (long long)stats->sos);
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printf("\t\tavg : %.1lf\n", calc_avg(stats->sum, count));
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printf("\t\tstd dev : %.1lf\n", calc_std_dev(stats->sum, stats->sos,
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count));
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}
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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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{
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if (src->max > tgt->max)
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tgt->max = src->max;
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if (src->min < tgt->min)
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tgt->min = src->min;
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tgt->sum += src->sum;
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tgt->sos += src->sos;
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}
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void update_abbrev_stat(struct abbrev_stat *stat, __u64 val)
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{
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if (val < stat->min)
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stat->min = val;
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if (val > stat->max)
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stat->max = val;
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stat->sum += val;
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stat->sos += (val * val);
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}
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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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tgt->min = src->min;
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tgt->max = src->max;
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tgt->sum = src->sum;
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tgt->sos = src->sos;
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}
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void init_abbrev_stat(struct abbrev_stat *data)
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{
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data->min = UINT64_MAX;
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data->max = 0;
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data->sum = 0;
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data->sos = 0;
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}
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