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 | */ |
22 | struct qdist_entry { |
23 | double x; |
24 | unsigned long count; |
25 | }; |
26 | |
27 | struct 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 | |
41 | void qdist_init(struct qdist *dist); |
42 | void qdist_destroy(struct qdist *dist); |
43 | |
44 | void qdist_add(struct qdist *dist, double x, long count); |
45 | void qdist_inc(struct qdist *dist, double x); |
46 | double qdist_xmin(const struct qdist *dist); |
47 | double qdist_xmax(const struct qdist *dist); |
48 | double qdist_avg(const struct qdist *dist); |
49 | unsigned long qdist_sample_count(const struct qdist *dist); |
50 | size_t qdist_unique_entries(const struct qdist *dist); |
51 | |
52 | /* callers must free the returned string with g_free() */ |
53 | char *qdist_pr_plain(const struct qdist *dist, size_t n_groups); |
54 | |
55 | /* callers must free the returned string with g_free() */ |
56 | char *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 */ |
59 | void qdist_bin__internal(struct qdist *to, const struct qdist *from, size_t n); |
60 | |
61 | #endif /* QEMU_QDIST_H */ |
62 | |