Re: [Qemu-devel] [PATCH v6 09/15] qdist: add test program

[Sergey Fedorov <serge.fdrv@gmail.com>]

On 25/05/16 04:13, Emilio G. Cota wrote:
> Reviewed-by: Richard Henderson <rth@twiddle.net>
> Signed-off-by: Emilio G. Cota <cota@braap.org>

Acked-by: Sergey Fedorov <sergey.fedorov@linaro.org>

> ---
>  tests/.gitignore   |   1 +
>  tests/Makefile     |   6 +-
>  tests/test-qdist.c | 369 +++++++++++++++++++++++++++++++++++++++++++++++++++++
>  3 files changed, 375 insertions(+), 1 deletion(-)
>  create mode 100644 tests/test-qdist.c
>
> diff --git a/tests/.gitignore b/tests/.gitignore
> index a06a8ba..7c0d156 100644
> --- a/tests/.gitignore
> +++ b/tests/.gitignore
> @@ -48,6 +48,7 @@ test-qapi-types.[ch]
>  test-qapi-visit.[ch]
>  test-qdev-global-props
>  test-qemu-opts
> +test-qdist
>  test-qga
>  test-qmp-commands
>  test-qmp-commands.h
> diff --git a/tests/Makefile b/tests/Makefile
> index 9dddde6..a5af20b 100644
> --- a/tests/Makefile
> +++ b/tests/Makefile
> @@ -70,6 +70,8 @@ check-unit-y += tests/rcutorture$(EXESUF)
>  gcov-files-rcutorture-y = util/rcu.c
>  check-unit-y += tests/test-rcu-list$(EXESUF)
>  gcov-files-test-rcu-list-y = util/rcu.c
> +check-unit-y += tests/test-qdist$(EXESUF)
> +gcov-files-test-qdist-y = util/qdist.c
>  check-unit-y += tests/test-bitops$(EXESUF)
>  check-unit-$(CONFIG_HAS_GLIB_SUBPROCESS_TESTS) += tests/test-qdev-global-props$(EXESUF)
>  check-unit-y += tests/check-qom-interface$(EXESUF)
> @@ -392,7 +394,8 @@ test-obj-y = tests/check-qint.o tests/check-qstring.o tests/check-qdict.o \
>  	tests/test-qmp-commands.o tests/test-visitor-serialization.o \
>  	tests/test-x86-cpuid.o tests/test-mul64.o tests/test-int128.o \
>  	tests/test-opts-visitor.o tests/test-qmp-event.o \
> -	tests/rcutorture.o tests/test-rcu-list.o
> +	tests/rcutorture.o tests/test-rcu-list.o \
> +	tests/test-qdist.o
>  
>  $(test-obj-y): QEMU_INCLUDES += -Itests
>  QEMU_CFLAGS += -I$(SRC_PATH)/tests
> @@ -431,6 +434,7 @@ tests/test-cutils$(EXESUF): tests/test-cutils.o util/cutils.o
>  tests/test-int128$(EXESUF): tests/test-int128.o
>  tests/rcutorture$(EXESUF): tests/rcutorture.o $(test-util-obj-y)
>  tests/test-rcu-list$(EXESUF): tests/test-rcu-list.o $(test-util-obj-y)
> +tests/test-qdist$(EXESUF): tests/test-qdist.o $(test-util-obj-y)
>  
>  tests/test-qdev-global-props$(EXESUF): tests/test-qdev-global-props.o \
>  	hw/core/qdev.o hw/core/qdev-properties.o hw/core/hotplug.o\
> diff --git a/tests/test-qdist.c b/tests/test-qdist.c
> new file mode 100644
> index 0000000..7625a57
> --- /dev/null
> +++ b/tests/test-qdist.c
> @@ -0,0 +1,369 @@
> +/*
> + * Copyright (C) 2016, Emilio G. Cota <cota@braap.org>
> + *
> + * License: GNU GPL, version 2 or later.
> + *   See the COPYING file in the top-level directory.
> + */
> +#include "qemu/osdep.h"
> +#include <glib.h>
> +#include "qemu/qdist.h"
> +
> +#include <math.h>
> +
> +struct entry_desc {
> +    double x;
> +    unsigned long count;
> +
> +    /* 0 prints a space, 1-8 prints from qdist_blocks[] */
> +    int fill_code;
> +};
> +
> +/* See: https://en.wikipedia.org/wiki/Block_Elements */
> +static const gunichar qdist_blocks[] = {
> +    0x2581,
> +    0x2582,
> +    0x2583,
> +    0x2584,
> +    0x2585,
> +    0x2586,
> +    0x2587,
> +    0x2588
> +};
> +
> +#define QDIST_NR_BLOCK_CODES ARRAY_SIZE(qdist_blocks)
> +
> +static char *pr_hist(const struct entry_desc *darr, size_t n)
> +{
> +    GString *s = g_string_new("");
> +    size_t i;
> +
> +    for (i = 0; i < n; i++) {
> +        int fill = darr[i].fill_code;
> +
> +        if (fill) {
> +            assert(fill <= QDIST_NR_BLOCK_CODES);
> +            g_string_append_unichar(s, qdist_blocks[fill - 1]);
> +        } else {
> +            g_string_append_c(s, ' ');
> +        }
> +    }
> +    return g_string_free(s, FALSE);
> +}
> +
> +static void
> +histogram_check(const struct qdist *dist, const struct entry_desc *darr,
> +                size_t n, size_t n_bins)
> +{
> +    char *pr = qdist_pr_plain(dist, n_bins);
> +    char *str = pr_hist(darr, n);
> +
> +    g_assert_cmpstr(pr, ==, str);
> +    g_free(pr);
> +    g_free(str);
> +}
> +
> +static void histogram_check_single_full(const struct qdist *dist, size_t n_bins)
> +{
> +    struct entry_desc desc = { .fill_code = 8 };
> +
> +    histogram_check(dist, &desc, 1, n_bins);
> +}
> +
> +static void
> +entries_check(const struct qdist *dist, const struct entry_desc *darr, size_t n)
> +{
> +    size_t i;
> +
> +    for (i = 0; i < n; i++) {
> +        struct qdist_entry *e = &dist->entries[i];
> +
> +        g_assert_cmpuint(e->count, ==, darr[i].count);
> +    }
> +}
> +
> +static void
> +entries_insert(struct qdist *dist, const struct entry_desc *darr, size_t n)
> +{
> +    size_t i;
> +
> +    for (i = 0; i < n; i++) {
> +        qdist_add(dist, darr[i].x, darr[i].count);
> +    }
> +}
> +
> +static void do_test_bin(const struct entry_desc *a, size_t n_a,
> +                        const struct entry_desc *b, size_t n_b)
> +{
> +    struct qdist qda;
> +    struct qdist qdb;
> +
> +    qdist_init(&qda);
> +
> +    entries_insert(&qda, a, n_a);
> +    qdist_inc(&qda, a[0].x);
> +    qdist_add(&qda, a[0].x, -1);
> +
> +    g_assert_cmpuint(qdist_unique_entries(&qda), ==, n_a);
> +    g_assert_cmpfloat(qdist_xmin(&qda), ==, a[0].x);
> +    g_assert_cmpfloat(qdist_xmax(&qda), ==, a[n_a - 1].x);
> +    histogram_check(&qda, a, n_a, 0);
> +    histogram_check(&qda, a, n_a, n_a);
> +
> +    qdist_bin__internal(&qdb, &qda, n_b);
> +    g_assert_cmpuint(qdb.n, ==, n_b);
> +    entries_check(&qdb, b, n_b);
> +    g_assert_cmpuint(qdist_sample_count(&qda), ==, qdist_sample_count(&qdb));
> +    /*
> +     * No histogram_check() for $qdb, since we'd rebin it and that is a bug.
> +     * Instead, regenerate it from $qda.
> +     */
> +    histogram_check(&qda, b, n_b, n_b);
> +
> +    qdist_destroy(&qdb);
> +    qdist_destroy(&qda);
> +}
> +
> +static void do_test_pr(uint32_t opt)
> +{
> +    static const struct entry_desc desc[] = {
> +        [0] = { 1, 900, 8 },
> +        [1] = { 2, 1, 1 },
> +        [2] = { 3, 2, 1 }
> +    };
> +    static const char border[] = "|";
> +    const char *llabel = NULL;
> +    const char *rlabel = NULL;
> +    struct qdist dist;
> +    GString *s;
> +    char *str;
> +    char *pr;
> +    size_t n;
> +
> +    n = ARRAY_SIZE(desc);
> +    qdist_init(&dist);
> +
> +    entries_insert(&dist, desc, n);
> +    histogram_check(&dist, desc, n, 0);
> +
> +    s = g_string_new("");
> +
> +    if (opt & QDIST_PR_LABELS) {
> +        unsigned int lopts = opt & (QDIST_PR_NODECIMAL |
> +                                    QDIST_PR_PERCENT |
> +                                    QDIST_PR_100X |
> +                                    QDIST_PR_NOBINRANGE);
> +
> +        if (lopts == 0) {
> +            llabel = "[1.0,1.7)";
> +            rlabel = "[2.3,3.0]";
> +        } else if (lopts == QDIST_PR_NODECIMAL) {
> +            llabel = "[1,2)";
> +            rlabel = "[2,3]";
> +        } else if (lopts == (QDIST_PR_PERCENT | QDIST_PR_NODECIMAL)) {
> +            llabel = "[1,2)%";
> +            rlabel = "[2,3]%";
> +        } else if (lopts == QDIST_PR_100X) {
> +            llabel = "[100.0,166.7)";
> +            rlabel = "[233.3,300.0]";
> +        } else if (lopts == (QDIST_PR_NOBINRANGE | QDIST_PR_NODECIMAL)) {
> +            llabel = "1";
> +            rlabel = "3";
> +        } else {
> +            g_assert_cmpstr("BUG", ==, "This is not meant to be exhaustive");
> +        }
> +    }
> +
> +    if (llabel) {
> +        g_string_append(s, llabel);
> +    }
> +    if (opt & QDIST_PR_BORDER) {
> +        g_string_append(s, border);
> +    }
> +
> +    str = pr_hist(desc, n);
> +    g_string_append(s, str);
> +    g_free(str);
> +
> +    if (opt & QDIST_PR_BORDER) {
> +        g_string_append(s, border);
> +    }
> +    if (rlabel) {
> +        g_string_append(s, rlabel);
> +    }
> +
> +    str = g_string_free(s, FALSE);
> +    pr = qdist_pr(&dist, n, opt);
> +    g_assert_cmpstr(pr, ==, str);
> +    g_free(pr);
> +    g_free(str);
> +
> +    qdist_destroy(&dist);
> +}
> +
> +static inline void do_test_pr_label(uint32_t opt)
> +{
> +    opt |= QDIST_PR_LABELS;
> +    do_test_pr(opt);
> +}
> +
> +static void test_pr(void)
> +{
> +    do_test_pr(0);
> +
> +    do_test_pr(QDIST_PR_BORDER);
> +
> +    /* 100X should be ignored because we're not setting LABELS */
> +    do_test_pr(QDIST_PR_100X);
> +
> +    do_test_pr_label(0);
> +    do_test_pr_label(QDIST_PR_NODECIMAL);
> +    do_test_pr_label(QDIST_PR_PERCENT | QDIST_PR_NODECIMAL);
> +    do_test_pr_label(QDIST_PR_100X);
> +    do_test_pr_label(QDIST_PR_NOBINRANGE | QDIST_PR_NODECIMAL);
> +}
> +
> +static void test_bin_shrink(void)
> +{
> +    static const struct entry_desc a[] = {
> +        [0] = { 0.0,   42922, 7 },
> +        [1] = { 0.25,  47834, 8 },
> +        [2] = { 0.50,  26628, 0 },
> +        [3] = { 0.625, 597,   4 },
> +        [4] = { 0.75,  10298, 1 },
> +        [5] = { 0.875, 22,    2 },
> +        [6] = { 1.0,   2771,  1 }
> +    };
> +    static const struct entry_desc b[] = {
> +        [0] = { 0.0, 42922, 7 },
> +        [1] = { 0.25, 47834, 8 },
> +        [2] = { 0.50, 27225, 3 },
> +        [3] = { 0.75, 13091, 1 }
> +    };
> +
> +    return do_test_bin(a, ARRAY_SIZE(a), b, ARRAY_SIZE(b));
> +}
> +
> +static void test_bin_expand(void)
> +{
> +    static const struct entry_desc a[] = {
> +        [0] = { 0.0,   11713, 5 },
> +        [1] = { 0.25,  20294, 0 },
> +        [2] = { 0.50,  17266, 8 },
> +        [3] = { 0.625, 1506,  0 },
> +        [4] = { 0.75,  10355, 6 },
> +        [5] = { 0.833, 2,     1 },
> +        [6] = { 0.875, 99,    4 },
> +        [7] = { 1.0,   4301,  2 }
> +    };
> +    static const struct entry_desc b[] = {
> +        [0] = { 0.0, 11713, 5 },
> +        [1] = { 0.0, 0,     0 },
> +        [2] = { 0.0, 20294, 8 },
> +        [3] = { 0.0, 0,     0 },
> +        [4] = { 0.0, 0,     0 },
> +        [5] = { 0.0, 17266, 6 },
> +        [6] = { 0.0, 1506,  1 },
> +        [7] = { 0.0, 10355, 4 },
> +        [8] = { 0.0, 101,   1 },
> +        [9] = { 0.0, 4301,  2 }
> +    };
> +
> +    return do_test_bin(a, ARRAY_SIZE(a), b, ARRAY_SIZE(b));
> +}
> +
> +static void test_bin_simple(void)
> +{
> +    static const struct entry_desc a[] = {
> +        [0] = { 10, 101, 8 },
> +        [1] = { 11, 0, 0 },
> +        [2] = { 12, 2, 1 }
> +    };
> +    static const struct entry_desc b[] = {
> +        [0] = { 0, 101, 8 },
> +        [1] = { 0, 0, 0 },
> +        [2] = { 0, 0, 0 },
> +        [3] = { 0, 0, 0 },
> +        [4] = { 0, 2, 1 }
> +    };
> +
> +    return do_test_bin(a, ARRAY_SIZE(a), b, ARRAY_SIZE(b));
> +}
> +
> +static void test_single_full(void)
> +{
> +    struct qdist dist;
> +
> +    qdist_init(&dist);
> +
> +    qdist_add(&dist, 3, 102);
> +    g_assert_cmpfloat(qdist_avg(&dist), ==, 3);
> +    g_assert_cmpfloat(qdist_xmin(&dist), ==, 3);
> +    g_assert_cmpfloat(qdist_xmax(&dist), ==, 3);
> +
> +    histogram_check_single_full(&dist, 0);
> +    histogram_check_single_full(&dist, 1);
> +    histogram_check_single_full(&dist, 10);
> +
> +    qdist_destroy(&dist);
> +}
> +
> +static void test_single_empty(void)
> +{
> +    struct qdist dist;
> +    char *pr;
> +
> +    qdist_init(&dist);
> +
> +    qdist_add(&dist, 3, 0);
> +    g_assert_cmpuint(qdist_sample_count(&dist), ==, 0);
> +    g_assert(isnan(qdist_avg(&dist)));
> +    g_assert_cmpfloat(qdist_xmin(&dist), ==, 3);
> +    g_assert_cmpfloat(qdist_xmax(&dist), ==, 3);
> +
> +    pr = qdist_pr_plain(&dist, 0);
> +    g_assert_cmpstr(pr, ==, " ");
> +    g_free(pr);
> +
> +    pr = qdist_pr_plain(&dist, 1);
> +    g_assert_cmpstr(pr, ==, " ");
> +    g_free(pr);
> +
> +    pr = qdist_pr_plain(&dist, 2);
> +    g_assert_cmpstr(pr, ==, " ");
> +    g_free(pr);
> +
> +    qdist_destroy(&dist);
> +}
> +
> +static void test_none(void)
> +{
> +    struct qdist dist;
> +    char *pr;
> +
> +    qdist_init(&dist);
> +
> +    g_assert(isnan(qdist_avg(&dist)));
> +    g_assert(isnan(qdist_xmin(&dist)));
> +    g_assert(isnan(qdist_xmax(&dist)));
> +
> +    pr = qdist_pr_plain(&dist, 0);
> +    g_assert(pr == NULL);
> +
> +    pr = qdist_pr_plain(&dist, 2);
> +    g_assert(pr == NULL);
> +
> +    qdist_destroy(&dist);
> +}
> +
> +int main(int argc, char *argv[])
> +{
> +    g_test_init(&argc, &argv, NULL);
> +    g_test_add_func("/qdist/none", test_none);
> +    g_test_add_func("/qdist/single/empty", test_single_empty);
> +    g_test_add_func("/qdist/single/full", test_single_full);
> +    g_test_add_func("/qdist/binning/simple", test_bin_simple);
> +    g_test_add_func("/qdist/binning/expand", test_bin_expand);
> +    g_test_add_func("/qdist/binning/shrink", test_bin_shrink);
> +    g_test_add_func("/qdist/pr", test_pr);
> +    return g_test_run();
> +}