cachepc-qemu

Fork of AMDESE/qemu with changes for cachepc side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-qemu
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qdist.h (1971B)

      1/*
      2 * Copyright (C) 2016, Emilio G. Cota <cota@braap.org>
      3 *
      4 * License: GNU GPL, version 2 or later.
      5 *   See the COPYING file in the top-level directory.
      6 */
      7#ifndef QEMU_QDIST_H
      8#define QEMU_QDIST_H
      9
     10#include "qemu/bitops.h"
     11
     12/*
     13 * Samples with the same 'x value' end up in the same qdist_entry,
     14 * e.g. inc(0.1) and inc(0.1) end up as {x=0.1, count=2}.
     15 *
     16 * Binning happens only at print time, so that we retain the flexibility to
     17 * choose the binning. This might not be ideal for workloads that do not care
     18 * much about precision and insert many samples all with different x values;
     19 * in that case, pre-binning (e.g. entering both 0.115 and 0.097 as 0.1)
     20 * should be considered.
     21 */
     22struct qdist_entry {
     23    double x;
     24    unsigned long count;
     25};
     26
     27struct qdist {
     28    struct qdist_entry *entries;
     29    size_t n;
     30    size_t size;
     31};
     32
     33#define QDIST_PR_BORDER     BIT(0)
     34#define QDIST_PR_LABELS     BIT(1)
     35/* the remaining options only work if PR_LABELS is set */
     36#define QDIST_PR_NODECIMAL  BIT(2)
     37#define QDIST_PR_PERCENT    BIT(3)
     38#define QDIST_PR_100X       BIT(4)
     39#define QDIST_PR_NOBINRANGE BIT(5)
     40
     41void qdist_init(struct qdist *dist);
     42void qdist_destroy(struct qdist *dist);
     43
     44void qdist_add(struct qdist *dist, double x, long count);
     45void qdist_inc(struct qdist *dist, double x);
     46double qdist_xmin(const struct qdist *dist);
     47double qdist_xmax(const struct qdist *dist);
     48double qdist_avg(const struct qdist *dist);
     49unsigned long qdist_sample_count(const struct qdist *dist);
     50size_t qdist_unique_entries(const struct qdist *dist);
     51
     52/* callers must free the returned string with g_free() */
     53char *qdist_pr_plain(const struct qdist *dist, size_t n_groups);
     54
     55/* callers must free the returned string with g_free() */
     56char *qdist_pr(const struct qdist *dist, size_t n_groups, uint32_t opt);
     57
     58/* Only qdist code and test code should ever call this function */
     59void qdist_bin__internal(struct qdist *to, const struct qdist *from, size_t n);
     60
     61#endif /* QEMU_QDIST_H */