[LTP] [PATCH 03/13] Hugetlb: Migrating libhugetlbfs mmap-gettest

[Tarun Sahu]

Hi Li,
Thanks for reviewing it.
Will take care of suggestions in next revision.

Thanks
Tarun

On Dec 26 2022, Li Wang wrote:
> On Sun, Dec 25, 2022 at 11:42 PM Tarun Sahu <tsahu@linux.ibm.com> wrote:
> 
> > Migrating the libhugetlbfs/testcases/mmap-gettest.c test
> >
> > Test Description: This baseline test validates that a mapping of a
> > certain size can be created, correctly.  Once created, all the pages are
> > filled with a pattern and rechecked to test for corruption. The mapping is
> > then released.  This process is repeated for a specified number of
> > iterations.
> >
> > Signed-off-by: Tarun Sahu <tsahu@linux.ibm.com>
> >
> 
> Reviewed-by: Li Wang <liwang@redhat.com>
> 
> > ---
> >  runtest/hugetlb                               |   1 +
> >  testcases/kernel/mem/.gitignore               |   1 +
> >  .../kernel/mem/hugetlb/hugemmap/hugemmap22.c  | 104 ++++++++++++++++++
> >  3 files changed, 106 insertions(+)
> >  create mode 100644 testcases/kernel/mem/hugetlb/hugemmap/hugemmap22.c
> >
> > diff --git a/runtest/hugetlb b/runtest/hugetlb
> > index 71b4d57e4..8e80db140 100644
> > --- a/runtest/hugetlb
> > +++ b/runtest/hugetlb
> > @@ -23,6 +23,7 @@ hugemmap18 hugemmap18
> >  hugemmap19 hugemmap19
> >  hugemmap20 hugemmap20
> >  hugemmap21 hugemmap21
> > +hugemmap22 hugemmap22
> >  hugemmap05_1 hugemmap05 -m
> >  hugemmap05_2 hugemmap05 -s
> >  hugemmap05_3 hugemmap05 -s -m
> > diff --git a/testcases/kernel/mem/.gitignore
> > b/testcases/kernel/mem/.gitignore
> > index 74edfa392..0fd01dbce 100644
> > --- a/testcases/kernel/mem/.gitignore
> > +++ b/testcases/kernel/mem/.gitignore
> > @@ -22,6 +22,7 @@
> >  /hugetlb/hugemmap/hugemmap19
> >  /hugetlb/hugemmap/hugemmap20
> >  /hugetlb/hugemmap/hugemmap21
> > +/hugetlb/hugemmap/hugemmap22
> >  /hugetlb/hugeshmat/hugeshmat01
> >  /hugetlb/hugeshmat/hugeshmat02
> >  /hugetlb/hugeshmat/hugeshmat03
> > diff --git a/testcases/kernel/mem/hugetlb/hugemmap/hugemmap22.c
> > b/testcases/kernel/mem/hugetlb/hugemmap/hugemmap22.c
> > new file mode 100644
> > index 000000000..50addbe62
> > --- /dev/null
> > +++ b/testcases/kernel/mem/hugetlb/hugemmap/hugemmap22.c
> > @@ -0,0 +1,104 @@
> > +// SPDX-License-Identifier: LGPL-2.1-or-later
> > +/*
> > + * Copyright (C) 2005-2006 IBM Corporation.
> > + * Author: David Gibson & Adam Litke
> > + */
> > +
> > +/*\
> > + * [Description]
> > + *
> > + * This baseline test validates that a mapping of a certain size can be
> > + * created, correctly.  Once created, all the pages are filled with a
> > + * pattern and rechecked to test for corruption. The mapping is then
> > + * released. This process is repeated for a specified number of
> > + * iterations.
> > + */
> > +
> > +#include <stdio.h>
> > +#include <sys/mount.h>
> > +#include <unistd.h>
> > +#include <unistd.h>
> > +
> > +#include "hugetlb.h"
> > +
> > +#define ITERATIONS 10
> >
> 
> I don't think we need too many iterations, it will cost too
> much time and easily timed out on a slower machine,
> so at most cycling up two times should be enough.
> 
> 
> 
> > +#define NR_HUGEPAGES 2
> > +#define MNTPOINT "hugetlbfs/"
> > +
> > +static unsigned long hpage_size;
> > +static int fd = -1;
> > +
> > +static void test_per_iteration(size_t size, int iter)
> > +{
> > +       char *m;
> > +       size_t i, j;
> > +       char pattern = 'A';
> > +
> > +       fd = tst_creat_unlinked(MNTPOINT, 0);
> > +       m = SAFE_MMAP(NULL, size, (PROT_READ|PROT_WRITE), MAP_SHARED, fd,
> > 0);
> > +
> > +       for (i = 0; i < NR_HUGEPAGES; i++) {
> > +               for (j = 0; j < hpage_size; j++) {
> > +                       if (*(m+(i*hpage_size)+j) != 0) {
> > +                               tst_res(TFAIL, "Iter %d: Verifying the
> > mmap area failed. "
> > +                                    "Got %c, expected 0", iter,
> > +                                    *(m+(i*hpage_size)+j));
> > +                               goto cleanup;
> > +                       }
> > +               }
> > +       }
> > +       for (i = 0; i < NR_HUGEPAGES; i++) {
> > +               pattern = 65+(i%26);
> > +               memset(m+(i*hpage_size), pattern, hpage_size);
> > +       }
> > +
> > +       for (i = 0; i < NR_HUGEPAGES; i++) {
> > +               pattern = 65+(i%26);
> > +               for (j = 0; j < hpage_size; j++) {
> > +                       if (*(m+(i*hpage_size)+j) != pattern) {
> > +                               tst_res(TFAIL, "Verifying the mmap area
> > failed. "
> > +                                    "got: %c, expected: %c",
> > +                                    *(m+(i*hpage_size)+j), pattern);
> > +                               goto cleanup;
> > +                       }
> > +               }
> > +       }
> > +
> > +cleanup:
> > +       SAFE_MUNMAP(m, size);
> > +       SAFE_CLOSE(fd);
> > +}
> > +
> > +static void run_test(void)
> > +{
> > +       size_t size;
> > +       int i;
> > +
> > +       size = NR_HUGEPAGES * hpage_size;
> > +       for (i = 0; i < ITERATIONS; i++)
> > +               test_per_iteration(size, i);
> > +
> > +       tst_res(TPASS, "Successfully verified the mmap area.");
> > +}
> > +
> > +static void setup(void)
> > +{
> > +       hpage_size = SAFE_READ_MEMINFO(MEMINFO_HPAGE_SIZE)*1024;
> >
> 
> hpage_size = tst_get_hugepage_size();
> 
> +}
> > +
> > +static void cleanup(void)
> > +{
> > +       if (fd >= 0)
> > +               SAFE_CLOSE(fd);
> > +}
> > +
> > +static struct tst_test test = {
> > +       .needs_root = 1,
> > +       .mntpoint = MNTPOINT,
> > +       .needs_hugetlbfs = 1,
> > +       .needs_tmpdir = 1,
> > +       .setup = setup,
> > +       .cleanup = cleanup,
> > +       .test_all = run_test,
> > +       .hugepages = {NR_HUGEPAGES, TST_NEEDS},
> > +};
> > --
> > 2.31.1
> >
> >
> 
> -- 
> Regards,
> Li Wang
> 
> -- 
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