Commit ff9249b7 authored by Emilio G. Cota's avatar Emilio G. Cota Committed by Richard Henderson
Browse files

qdist: add test program 



Acked-by: default avatarSergey Fedorov <sergey.fedorov@linaro.org>
Reviewed-by: default avatarRichard Henderson <rth@twiddle.net>
Signed-off-by: default avatarEmilio G. Cota <cota@braap.org>
Message-Id: <1465412133-3029-10-git-send-email-cota@braap.org>
Signed-off-by: default avatarRichard Henderson <rth@twiddle.net>
parent bf3afd5f

tests/.gitignore

+1 −0
Original line number Diff line number Diff line
@@ -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

tests/Makefile.include

+5 −1
Original line number Diff line number Diff line
@@ -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)
@@ -394,7 +396,8 @@ 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$(SRC_PATH)/tests
@@ -433,6 +436,7 @@ tests/test-cutils$(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\

tests/test-qdist.c

0 → 100644
+384 −0
Original line number Diff line number Diff line 
/*

 * 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_precision(void)

{

    static const struct entry_desc a[] = {

        [0] = { 0, 213549, 8 },

        [1] = { 1, 70, 1 },

    };

    static const struct entry_desc b[] = {

        [0] = { 0, 213549, 8 },

        [1] = { 0, 70, 1 },

    };



    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/precision", test_bin_precision);

    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();

}