On 01/13/2015 03:22 AM, Anshuman Khandual wrote:
> This test continuously updates the system wide DSCR default value
> in the sysfs interface and makes sure that the same is reflected
> across all the sysfs interfaces for each individual CPUs present
> on the system.
>
> Signed-off-by: Anshuman Khandual <khand...@linux.vnet.ibm.com>
> ---
> tools/testing/selftests/powerpc/dscr/Makefile | 3 +-
> .../selftests/powerpc/dscr/dscr_sysfs_test.c | 89
> ++++++++++++++++++++++
> 2 files changed, 91 insertions(+), 1 deletion(-)
> create mode 100644 tools/testing/selftests/powerpc/dscr/dscr_sysfs_test.c
>
> diff --git a/tools/testing/selftests/powerpc/dscr/Makefile
> b/tools/testing/selftests/powerpc/dscr/Makefile
> index 4e84309..fada526 100644
> --- a/tools/testing/selftests/powerpc/dscr/Makefile
> +++ b/tools/testing/selftests/powerpc/dscr/Makefile
> @@ -1,5 +1,6 @@
> PROGS := dscr_default_test dscr_explicit_test dscr_user_test \
> - dscr_inherit_test dscr_inherit_exec_test
> + dscr_inherit_test dscr_inherit_exec_test \
> + dscr_sysfs_test
>
> CFLAGS := $(CFLAGS) -lpthread
>
> diff --git a/tools/testing/selftests/powerpc/dscr/dscr_sysfs_test.c
> b/tools/testing/selftests/powerpc/dscr/dscr_sysfs_test.c
> new file mode 100644
> index 0000000..3d11439
> --- /dev/null
> +++ b/tools/testing/selftests/powerpc/dscr/dscr_sysfs_test.c
> @@ -0,0 +1,89 @@
> +/*
> + * POWER Data Stream Control Register (DSCR) sysfs interface test
> + *
> + * This test updates to system wide DSCR default through the sysfs interface
> + * and then verifies that all the CPU specific DSCR defaults are updated as
> + * well verified from their sysfs interfaces.
> + *
> + * Copyright (C) 2015 Anshuman Khandual <khand...@linux.vnet.ibm.com>, IBM
> + *
> + * This program is free software; you can redistribute it and/or
> + * modify it under the terms of the GNU General Public License
> + * as published by the Free Software Foundation; either version
> + * 2 of the License, or (at your option) any later version.
> + */
> +#include "dscr.h"
> +
> +static int check_cpu_dscr_default(char *file, unsigned long val)
> +{
> + char buf[10];
> + int fd, rc;
> +
> + fd = open(file, O_RDWR);
> + if (fd == -1) {
> + perror("open() failed\n");
> + return 1;
> + }
> +
> + rc = read(fd, buf, sizeof(buf));
> + if (rc == -1) {
> + perror("read() failed\n");
> + return 1;
> + }
> + close(fd);
> +
> + buf[rc] = '\0';
> + if (strtol(buf, NULL, 16) != val) {
> + printf("DSCR match failed: %ld (system) %ld (cpu)\n",
> + val, strtol(buf, NULL, 16));
> + return 1;
> + }
> + return 0;
> +}
> +
> +static int check_all_cpu_dscr_defaults(unsigned long val)
> +{
> + DIR *sysfs;
> + struct dirent *dp;
> + char file[LEN_MAX];
> +
> + sysfs = opendir(CPU_PATH);
> + if (!sysfs) {
> + perror("opendir() failed\n");
> + return 1;
> + }
> +
> + while ((dp = readdir(sysfs))) {
> + if (!(dp->d_type & DT_DIR))
> + continue;
> + if (!strcmp(dp->d_name, "cpuidle"))
> + continue;
> + if (!strstr(dp->d_name, "cpu"))
> + continue;
> +
> + sprintf(file, "%s%s/dscr", CPU_PATH, dp->d_name);
> + if (check_cpu_dscr_default(file, val))
> + return 1;
> + }
> + closedir(sysfs);
> + return 0;
> +}
> +
> +int test_body(void)
> +{
> + int i, j;
> +
> + for (i = 0; i < COUNT; i++) {
> + for (j = 0; j < DSCR_MAX; j++) {
> + set_default_dscr(j);
> + if (check_all_cpu_dscr_defaults(j))
> + return 1;
> + }
> + }
> + return 0;
> +}
> +
> +int main(int argc, char *argv[])
> +{
> + return test_harness(test_body, "dscr_sysfs_test");
> +}
>
Could you please add a .gitignore for powerpc targets as we
discussed earlier. It can be separate patch.
Also, I would like to see the test results reports using
kselftest.h - it can be separate patch in the interest of
getting tests in.
Acked-by: Shuah Khan <shua...@osg.samsung.com>
Please take this through powerpc maintainer git.
thanks,
-- Shuah
--
Shuah Khan
Sr. Linux Kernel Developer
Open Source Innovation Group
Samsung Research America (Silicon Valley)
shua...@osg.samsung.com | (970) 217-8978
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