January 2024 - Linux-kselftest-mirror

[PATCH v2] kselftest: dt: Stop relying on dirname to improve performance

by Nícolas F. R. A. Prado

When walking directory trees, instead of looking for specific files and running dirname to get the parent folder, traverse all folders and ignore the ones not containing the desired files. This avoids the need to call dirname inside the loop, which drastically decreases run time: Running locally on a mt8192-asurada-spherion, which reports 160 test cases, has gone from 5.5s to 2.9s, while running remotely with an nfsroot has gone from 13.5s to 5.5s. This change has a side-effect, which is that the root DT node now also shows in the output, even though it isn't expected to bind to a driver. However there shouldn't be a matching driver for the board compatible, so the end result will be just an extra skipped test: ok 1 / # SKIP Reported-by: Mark Brown <broonie(a)kernel.org> Closes: https://lore.kernel.org/all/310391e8-fdf2-4c2f-a680-7744eb685177@sirena.org… Fixes: 14571ab1ad21 ("kselftest: Add new test for detecting unprobed Devicetree devices") Tested-by: Mark Brown <broonie(a)kernel.org> Signed-off-by: Nícolas F. R. A. Prado <nfraprado(a)collabora.com> --- Changes in v2: - Tweaked commit message - Added trailer tags - Rebased on 6.8-rc1 --- tools/testing/selftests/dt/test_unprobed_devices.sh | 13 +++++++------ 1 file changed, 7 insertions(+), 6 deletions(-) diff --git a/tools/testing/selftests/dt/test_unprobed_devices.sh b/tools/testing/selftests/dt/test_unprobed_devices.sh index b07af2a4c4de..7fae90293a9d 100755 --- a/tools/testing/selftests/dt/test_unprobed_devices.sh +++ b/tools/testing/selftests/dt/test_unprobed_devices.sh @@ -33,8 +33,8 @@ if [[ ! -d "${PDT}" ]]; then fi nodes_compatible=$( - for node_compat in $(find ${PDT} -name compatible); do - node=$(dirname "${node_compat}") + for node in $(find ${PDT} -type d); do + [ ! -f "${node}"/compatible ] && continue # Check if node is available if [[ -e "${node}"/status ]]; then status=$(tr -d '\000' < "${node}"/status) @@ -46,10 +46,11 @@ nodes_compatible=$( nodes_dev_bound=$( IFS=$'\n' - for uevent in $(find /sys/devices -name uevent); do - if [[ -d "$(dirname "${uevent}")"/driver ]]; then - grep '^OF_FULLNAME=' "${uevent}" | sed -e 's|OF_FULLNAME=||' - fi + for dev_dir in $(find /sys/devices -type d); do + [ ! -f "${dev_dir}"/uevent ] && continue + [ ! -d "${dev_dir}"/driver ] && continue + + grep '^OF_FULLNAME=' "${dev_dir}"/uevent | sed -e 's|OF_FULLNAME=||' done ) --- base-commit: 6613476e225e090cc9aad49be7fa504e290dd33d change-id: 20240122-dt-kselftest-dirname-perf-fix-7dc421e6dfb0 Best regards, -- Nícolas F. R. A. Prado <nfraprado(a)collabora.com>

1 year, 4 months

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[PATCH] selftests/mm: run_vmtests.sh: add hugetlb test category

by Breno Leitao

The usage of run_vmtests.sh does not include hugetlb, which is a valid test category. Add the 'hugetlb' to the usage of run_vmtests.sh. Signed-off-by: Breno Leitao <leitao(a)debian.org> --- tools/testing/selftests/mm/run_vmtests.sh | 2 ++ 1 file changed, 2 insertions(+) diff --git a/tools/testing/selftests/mm/run_vmtests.sh b/tools/testing/selftests/mm/run_vmtests.sh index 55898d64e2eb..2ee0a1c4740f 100755 --- a/tools/testing/selftests/mm/run_vmtests.sh +++ b/tools/testing/selftests/mm/run_vmtests.sh @@ -65,6 +65,8 @@ separated by spaces: test copy-on-write semantics - thp test transparent huge pages +- hugetlb + test hugetlbfs huge pages - migration invoke move_pages(2) to exercise the migration entry code paths in the kernel -- 2.39.3

1 year, 4 months

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[PATCH AUTOSEL 6.6 05/10] tools: selftests: riscv: Fix compile warnings in mm tests

by Sasha Levin

From: Christoph Müllner <christoph.muellner(a)vrull.eu> [ Upstream commit 12c16919652b5873f524c8b361336ecfa5ce5e6b ] When building the mm tests with a riscv32 compiler, we see a range of shift-count-overflow errors from shifting 1UL by more than 32 bits in do_mmaps(). Since, the relevant code is only called from code that is gated by `__riscv_xlen == 64`, we can just apply the same gating to do_mmaps(). Signed-off-by: Christoph Müllner <christoph.muellner(a)vrull.eu> Reviewed-by: Alexandre Ghiti <alexghiti(a)rivosinc.com> Reviewed-by: Andrew Jones <ajones(a)ventanamicro.com> Link: https://lore.kernel.org/r/20231123185821.2272504-6-christoph.muellner@vrull… Signed-off-by: Palmer Dabbelt <palmer(a)rivosinc.com> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- tools/testing/selftests/riscv/mm/mmap_test.h | 3 +++ 1 file changed, 3 insertions(+) diff --git a/tools/testing/selftests/riscv/mm/mmap_test.h b/tools/testing/selftests/riscv/mm/mmap_test.h index 9b8434f62f57..2e0db9c5be6c 100644 --- a/tools/testing/selftests/riscv/mm/mmap_test.h +++ b/tools/testing/selftests/riscv/mm/mmap_test.h @@ -18,6 +18,8 @@ struct addresses { int *on_56_addr; }; +// Only works on 64 bit +#if __riscv_xlen == 64 static inline void do_mmaps(struct addresses *mmap_addresses) { /* @@ -50,6 +52,7 @@ static inline void do_mmaps(struct addresses *mmap_addresses) mmap_addresses->on_56_addr = mmap(on_56_bits, 5 * sizeof(int), prot, flags, 0, 0); } +#endif /* __riscv_xlen == 64 */ static inline int memory_layout(void) { -- 2.43.0

1 year, 4 months

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[PATCH AUTOSEL 6.6 04/10] tools: selftests: riscv: Fix compile warnings in vector tests

by Sasha Levin

From: Christoph Müllner <christoph.muellner(a)vrull.eu> [ Upstream commit e1baf5e68ed128c1e22ba43e5190526d85de323c ] GCC prints a couple of format string warnings when compiling the vector tests. Let's follow the recommendation in Documentation/printk-formats.txt to fix these warnings. Signed-off-by: Christoph Müllner <christoph.muellner(a)vrull.eu> Reviewed-by: Alexandre Ghiti <alexghiti(a)rivosinc.com> Reviewed-by: Andrew Jones <ajones(a)ventanamicro.com> Link: https://lore.kernel.org/r/20231123185821.2272504-5-christoph.muellner@vrull… Signed-off-by: Palmer Dabbelt <palmer(a)rivosinc.com> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- tools/testing/selftests/riscv/vector/v_initval_nolibc.c | 2 +- tools/testing/selftests/riscv/vector/vstate_prctl.c | 4 ++-- 2 files changed, 3 insertions(+), 3 deletions(-) diff --git a/tools/testing/selftests/riscv/vector/v_initval_nolibc.c b/tools/testing/selftests/riscv/vector/v_initval_nolibc.c index 66764edb0d52..1dd94197da30 100644 --- a/tools/testing/selftests/riscv/vector/v_initval_nolibc.c +++ b/tools/testing/selftests/riscv/vector/v_initval_nolibc.c @@ -27,7 +27,7 @@ int main(void) datap = malloc(MAX_VSIZE); if (!datap) { - ksft_test_result_fail("fail to allocate memory for size = %lu\n", MAX_VSIZE); + ksft_test_result_fail("fail to allocate memory for size = %d\n", MAX_VSIZE); exit(-1); } diff --git a/tools/testing/selftests/riscv/vector/vstate_prctl.c b/tools/testing/selftests/riscv/vector/vstate_prctl.c index b348b475be57..8ad94e08ff4d 100644 --- a/tools/testing/selftests/riscv/vector/vstate_prctl.c +++ b/tools/testing/selftests/riscv/vector/vstate_prctl.c @@ -68,7 +68,7 @@ int test_and_compare_child(long provided, long expected, int inherit) } rc = launch_test(inherit); if (rc != expected) { - ksft_test_result_fail("Test failed, check %d != %d\n", rc, + ksft_test_result_fail("Test failed, check %d != %ld\n", rc, expected); return -2; } @@ -87,7 +87,7 @@ int main(void) pair.key = RISCV_HWPROBE_KEY_IMA_EXT_0; rc = riscv_hwprobe(&pair, 1, 0, NULL, 0); if (rc < 0) { - ksft_test_result_fail("hwprobe() failed with %d\n", rc); + ksft_test_result_fail("hwprobe() failed with %ld\n", rc); return -1; } -- 2.43.0

1 year, 4 months

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[PATCH AUTOSEL 6.7 07/12] tools: selftests: riscv: Fix compile warnings in mm tests

by Sasha Levin

From: Christoph Müllner <christoph.muellner(a)vrull.eu> [ Upstream commit 12c16919652b5873f524c8b361336ecfa5ce5e6b ] When building the mm tests with a riscv32 compiler, we see a range of shift-count-overflow errors from shifting 1UL by more than 32 bits in do_mmaps(). Since, the relevant code is only called from code that is gated by `__riscv_xlen == 64`, we can just apply the same gating to do_mmaps(). Signed-off-by: Christoph Müllner <christoph.muellner(a)vrull.eu> Reviewed-by: Alexandre Ghiti <alexghiti(a)rivosinc.com> Reviewed-by: Andrew Jones <ajones(a)ventanamicro.com> Link: https://lore.kernel.org/r/20231123185821.2272504-6-christoph.muellner@vrull… Signed-off-by: Palmer Dabbelt <palmer(a)rivosinc.com> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- tools/testing/selftests/riscv/mm/mmap_test.h | 3 +++ 1 file changed, 3 insertions(+) diff --git a/tools/testing/selftests/riscv/mm/mmap_test.h b/tools/testing/selftests/riscv/mm/mmap_test.h index 9b8434f62f57..2e0db9c5be6c 100644 --- a/tools/testing/selftests/riscv/mm/mmap_test.h +++ b/tools/testing/selftests/riscv/mm/mmap_test.h @@ -18,6 +18,8 @@ struct addresses { int *on_56_addr; }; +// Only works on 64 bit +#if __riscv_xlen == 64 static inline void do_mmaps(struct addresses *mmap_addresses) { /* @@ -50,6 +52,7 @@ static inline void do_mmaps(struct addresses *mmap_addresses) mmap_addresses->on_56_addr = mmap(on_56_bits, 5 * sizeof(int), prot, flags, 0, 0); } +#endif /* __riscv_xlen == 64 */ static inline int memory_layout(void) { -- 2.43.0

1 year, 4 months

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[PATCH AUTOSEL 6.7 06/12] tools: selftests: riscv: Fix compile warnings in vector tests

by Sasha Levin

From: Christoph Müllner <christoph.muellner(a)vrull.eu> [ Upstream commit e1baf5e68ed128c1e22ba43e5190526d85de323c ] GCC prints a couple of format string warnings when compiling the vector tests. Let's follow the recommendation in Documentation/printk-formats.txt to fix these warnings. Signed-off-by: Christoph Müllner <christoph.muellner(a)vrull.eu> Reviewed-by: Alexandre Ghiti <alexghiti(a)rivosinc.com> Reviewed-by: Andrew Jones <ajones(a)ventanamicro.com> Link: https://lore.kernel.org/r/20231123185821.2272504-5-christoph.muellner@vrull… Signed-off-by: Palmer Dabbelt <palmer(a)rivosinc.com> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- tools/testing/selftests/riscv/vector/v_initval_nolibc.c | 2 +- tools/testing/selftests/riscv/vector/vstate_prctl.c | 4 ++-- 2 files changed, 3 insertions(+), 3 deletions(-) diff --git a/tools/testing/selftests/riscv/vector/v_initval_nolibc.c b/tools/testing/selftests/riscv/vector/v_initval_nolibc.c index 66764edb0d52..1dd94197da30 100644 --- a/tools/testing/selftests/riscv/vector/v_initval_nolibc.c +++ b/tools/testing/selftests/riscv/vector/v_initval_nolibc.c @@ -27,7 +27,7 @@ int main(void) datap = malloc(MAX_VSIZE); if (!datap) { - ksft_test_result_fail("fail to allocate memory for size = %lu\n", MAX_VSIZE); + ksft_test_result_fail("fail to allocate memory for size = %d\n", MAX_VSIZE); exit(-1); } diff --git a/tools/testing/selftests/riscv/vector/vstate_prctl.c b/tools/testing/selftests/riscv/vector/vstate_prctl.c index b348b475be57..8ad94e08ff4d 100644 --- a/tools/testing/selftests/riscv/vector/vstate_prctl.c +++ b/tools/testing/selftests/riscv/vector/vstate_prctl.c @@ -68,7 +68,7 @@ int test_and_compare_child(long provided, long expected, int inherit) } rc = launch_test(inherit); if (rc != expected) { - ksft_test_result_fail("Test failed, check %d != %d\n", rc, + ksft_test_result_fail("Test failed, check %d != %ld\n", rc, expected); return -2; } @@ -87,7 +87,7 @@ int main(void) pair.key = RISCV_HWPROBE_KEY_IMA_EXT_0; rc = riscv_hwprobe(&pair, 1, 0, NULL, 0); if (rc < 0) { - ksft_test_result_fail("hwprobe() failed with %d\n", rc); + ksft_test_result_fail("hwprobe() failed with %ld\n", rc); return -1; } -- 2.43.0

1 year, 4 months

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[PATCH AUTOSEL 6.7 05/12] tools: selftests: riscv: Fix compile warnings in cbo

by Sasha Levin

From: Christoph Müllner <christoph.muellner(a)vrull.eu> [ Upstream commit ac7b2a02d62faff8c6d45bacb5cb9ea565b47776 ] GCC prints a couple of format string warnings when compiling the cbo test. Let's follow the recommendation in Documentation/printk-formats.txt to fix these warnings. Signed-off-by: Christoph Müllner <christoph.muellner(a)vrull.eu> Reviewed-by: Alexandre Ghiti <alexghiti(a)rivosinc.com> Reviewed-by: Andrew Jones <ajones(a)ventanamicro.com> Link: https://lore.kernel.org/r/20231123185821.2272504-3-christoph.muellner@vrull… Signed-off-by: Palmer Dabbelt <palmer(a)rivosinc.com> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- tools/testing/selftests/riscv/hwprobe/cbo.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/tools/testing/selftests/riscv/hwprobe/cbo.c b/tools/testing/selftests/riscv/hwprobe/cbo.c index 50a2cc8aef38..c6a83ab11e22 100644 --- a/tools/testing/selftests/riscv/hwprobe/cbo.c +++ b/tools/testing/selftests/riscv/hwprobe/cbo.c @@ -97,7 +97,7 @@ static void test_zicboz(void *arg) block_size = pair.value; ksft_test_result(rc == 0 && pair.key == RISCV_HWPROBE_KEY_ZICBOZ_BLOCK_SIZE && is_power_of_2(block_size), "Zicboz block size\n"); - ksft_print_msg("Zicboz block size: %ld\n", block_size); + ksft_print_msg("Zicboz block size: %llu\n", block_size); illegal_insn = false; cbo_zero(&mem[block_size]); @@ -121,7 +121,7 @@ static void test_zicboz(void *arg) for (j = 0; j < block_size; ++j) { if (mem[i * block_size + j] != expected) { ksft_test_result_fail("cbo.zero check\n"); - ksft_print_msg("cbo.zero check: mem[%d] != 0x%x\n", + ksft_print_msg("cbo.zero check: mem[%llu] != 0x%x\n", i * block_size + j, expected); return; } @@ -201,7 +201,7 @@ int main(int argc, char **argv) pair.key = RISCV_HWPROBE_KEY_IMA_EXT_0; rc = riscv_hwprobe(&pair, 1, sizeof(cpu_set_t), (unsigned long *)&cpus, 0); if (rc < 0) - ksft_exit_fail_msg("hwprobe() failed with %d\n", rc); + ksft_exit_fail_msg("hwprobe() failed with %ld\n", rc); assert(rc == 0 && pair.key == RISCV_HWPROBE_KEY_IMA_EXT_0); if (pair.value & RISCV_HWPROBE_EXT_ZICBOZ) { -- 2.43.0

1 year, 4 months

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[PATCH AUTOSEL 6.7 04/12] tools: selftests: riscv: Fix compile warnings in hwprobe

by Sasha Levin

From: Christoph Müllner <christoph.muellner(a)vrull.eu> [ Upstream commit b91c26fdb0e8150cdb610cdaadea62bb5e43bee0 ] GCC prints a couple of format string warnings when compiling the hwprobe test. Let's follow the recommendation in Documentation/printk-formats.txt to fix these warnings. Signed-off-by: Christoph Müllner <christoph.muellner(a)vrull.eu> Reviewed-by: Alexandre Ghiti <alexghiti(a)rivosinc.com> Reviewed-by: Andrew Jones <ajones(a)ventanamicro.com> Link: https://lore.kernel.org/r/20231123185821.2272504-2-christoph.muellner@vrull… Signed-off-by: Palmer Dabbelt <palmer(a)rivosinc.com> Signed-off-by: Sasha Levin <sashal(a)kernel.org> --- tools/testing/selftests/riscv/hwprobe/hwprobe.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/tools/testing/selftests/riscv/hwprobe/hwprobe.c b/tools/testing/selftests/riscv/hwprobe/hwprobe.c index c474891df307..abb825811c70 100644 --- a/tools/testing/selftests/riscv/hwprobe/hwprobe.c +++ b/tools/testing/selftests/riscv/hwprobe/hwprobe.c @@ -29,7 +29,7 @@ int main(int argc, char **argv) /* Fail if the kernel claims not to recognize a base key. */ if ((i < 4) && (pairs[i].key != i)) ksft_exit_fail_msg("Failed to recognize base key: key != i, " - "key=%ld, i=%ld\n", pairs[i].key, i); + "key=%lld, i=%ld\n", pairs[i].key, i); if (pairs[i].key != RISCV_HWPROBE_KEY_BASE_BEHAVIOR) continue; @@ -37,7 +37,7 @@ int main(int argc, char **argv) if (pairs[i].value & RISCV_HWPROBE_BASE_BEHAVIOR_IMA) continue; - ksft_exit_fail_msg("Unexpected pair: (%ld, %ld)\n", pairs[i].key, pairs[i].value); + ksft_exit_fail_msg("Unexpected pair: (%lld, %llu)\n", pairs[i].key, pairs[i].value); } out = riscv_hwprobe(pairs, 8, 0, 0, 0); -- 2.43.0

1 year, 4 months

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[PATCH bpf-next v2] selftests/bpf: Drop return in bpf_testmod_exit

by Geliang Tang

From: Geliang Tang <tanggeliang(a)kylinos.cn> bpf_testmod_exit() should not have a return value, so this patch drops this useless 'return' in it. Acked-by: Jiri Olsa <jolsa(a)kernel.org> Signed-off-by: Geliang Tang <tanggeliang(a)kylinos.cn> --- v2: - rebase on top of latest bpf-next/master. --- tools/testing/selftests/bpf/bpf_testmod/bpf_testmod.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/testing/selftests/bpf/bpf_testmod/bpf_testmod.c b/tools/testing/selftests/bpf/bpf_testmod/bpf_testmod.c index 8befaf17d454..6f163a0f1c94 100644 --- a/tools/testing/selftests/bpf/bpf_testmod/bpf_testmod.c +++ b/tools/testing/selftests/bpf/bpf_testmod/bpf_testmod.c @@ -619,7 +619,7 @@ static void bpf_testmod_exit(void) while (refcount_read(&prog_test_struct.cnt) > 1) msleep(20); - return sysfs_remove_bin_file(kernel_kobj, &bin_attr_bpf_testmod_file); + sysfs_remove_bin_file(kernel_kobj, &bin_attr_bpf_testmod_file); } module_init(bpf_testmod_init); -- 2.40.1

1 year, 4 months

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[PATCH v13 6/6] ring-buffer/selftest: Add ring-buffer mapping test

by Vincent Donnefort

This test maps a ring-buffer and validate the meta-page after reset and after emitting few events. Cc: Shuah Khan <shuah(a)kernel.org> Cc: Shuah Khan <skhan(a)linuxfoundation.org> Cc: linux-kselftest(a)vger.kernel.org Signed-off-by: Vincent Donnefort <vdonnefort(a)google.com> diff --git a/tools/testing/selftests/ring-buffer/Makefile b/tools/testing/selftests/ring-buffer/Makefile new file mode 100644 index 000000000000..627c5fa6d1ab --- /dev/null +++ b/tools/testing/selftests/ring-buffer/Makefile @@ -0,0 +1,8 @@ +# SPDX-License-Identifier: GPL-2.0 +CFLAGS += -Wl,-no-as-needed -Wall +CFLAGS += $(KHDR_INCLUDES) +CFLAGS += -D_GNU_SOURCE + +TEST_GEN_PROGS = map_test + +include ../lib.mk diff --git a/tools/testing/selftests/ring-buffer/config b/tools/testing/selftests/ring-buffer/config new file mode 100644 index 000000000000..ef8214661612 --- /dev/null +++ b/tools/testing/selftests/ring-buffer/config @@ -0,0 +1 @@ +CONFIG_FTRACE=y diff --git a/tools/testing/selftests/ring-buffer/map_test.c b/tools/testing/selftests/ring-buffer/map_test.c new file mode 100644 index 000000000000..e3220f8d618b --- /dev/null +++ b/tools/testing/selftests/ring-buffer/map_test.c @@ -0,0 +1,183 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Ring-buffer memory mapping tests + * + * Copyright (c) 2024 Vincent Donnefort <vdonnefort(a)google.com> + */ +#include <fcntl.h> +#include <sched.h> +#include <stdbool.h> +#include <stdio.h> +#include <stdlib.h> +#include <unistd.h> + +#include <linux/trace_mmap.h> + +#include <sys/mman.h> +#include <sys/ioctl.h> + +#include "../user_events/user_events_selftests.h" /* share tracefs setup */ +#include "../kselftest_harness.h" + +#define TRACEFS_ROOT "/sys/kernel/tracing" + +static int __tracefs_write(const char *path, const char *value) +{ + FILE *file; + + file = fopen(path, "w"); + if (!file) + return -1; + + fputs(value, file); + fclose(file); + + return 0; +} + +static int __tracefs_write_int(const char *path, int value) +{ + char *str; + int ret; + + if (asprintf(&str, "%d", value) < 0) + return -1; + + ret = __tracefs_write(path, str); + + free(str); + + return ret; +} + +#define tracefs_write_int(path, value) \ + ASSERT_EQ(__tracefs_write_int((path), (value)), 0) + +static int tracefs_reset(void) +{ + if (__tracefs_write_int(TRACEFS_ROOT"/tracing_on", 0)) + return -1; + if (__tracefs_write_int(TRACEFS_ROOT"/trace", 0)) + return -1; + if (__tracefs_write(TRACEFS_ROOT"/set_event", "")) + return -1; + if (__tracefs_write(TRACEFS_ROOT"/current_tracer", "nop")) + return -1; + + return 0; +} + +FIXTURE(map) { + struct trace_buffer_meta *meta; + void *data; + int cpu_fd; + bool umount; +}; + +FIXTURE_VARIANT(map) { + int subbuf_size; +}; + +FIXTURE_VARIANT_ADD(map, subbuf_size_4k) { + .subbuf_size = 4, +}; + +FIXTURE_VARIANT_ADD(map, subbuf_size_8k) { + .subbuf_size = 8, +}; + +FIXTURE_SETUP(map) +{ + int cpu = sched_getcpu(), page_size = getpagesize(); + unsigned long meta_len, data_len; + char *cpu_path, *message; + bool fail, umount; + cpu_set_t cpu_mask; + void *map; + + if (!tracefs_enabled(&message, &fail, &umount)) { + if (fail) { + TH_LOG("Tracefs setup failed: %s", message); + ASSERT_FALSE(fail); + } + SKIP(return, "Skipping: %s", message); + } + + self->umount = umount; + + ASSERT_GE(cpu, 0); + + ASSERT_EQ(tracefs_reset(), 0); + + tracefs_write_int(TRACEFS_ROOT"/buffer_subbuf_size_kb", variant->subbuf_size); + + ASSERT_GE(asprintf(&cpu_path, + TRACEFS_ROOT"/per_cpu/cpu%d/trace_pipe_raw", + cpu), 0); + + self->cpu_fd = open(cpu_path, O_RDONLY | O_NONBLOCK); + ASSERT_GE(self->cpu_fd, 0); + free(cpu_path); + + map = mmap(NULL, page_size, PROT_READ, MAP_SHARED, self->cpu_fd, 0); + ASSERT_NE(map, MAP_FAILED); + self->meta = (struct trace_buffer_meta *)map; + + meta_len = self->meta->meta_page_size; + data_len = self->meta->subbuf_size * self->meta->nr_subbufs; + + map = mmap(NULL, data_len, PROT_READ, MAP_SHARED, self->cpu_fd, meta_len); + ASSERT_NE(map, MAP_FAILED); + self->data = map; + + /* + * Ensure generated events will be found on this very same ring-buffer. + */ + CPU_ZERO(&cpu_mask); + CPU_SET(cpu, &cpu_mask); + ASSERT_EQ(sched_setaffinity(0, sizeof(cpu_mask), &cpu_mask), 0); +} + +FIXTURE_TEARDOWN(map) +{ + tracefs_reset(); + + if (self->umount) + tracefs_unmount(); + + munmap(self->data, self->meta->subbuf_size * self->meta->nr_subbufs); + munmap(self->meta, self->meta->meta_page_size); + close(self->cpu_fd); +} + +TEST_F(map, meta_page_check) +{ + int cnt = 0; + + ASSERT_EQ(self->meta->entries, 0); + ASSERT_EQ(self->meta->overrun, 0); + ASSERT_EQ(self->meta->read, 0); + + ASSERT_EQ(self->meta->reader.id, 0); + ASSERT_EQ(self->meta->reader.read, 0); + + ASSERT_EQ(ioctl(self->cpu_fd, TRACE_MMAP_IOCTL_GET_READER), 0); + ASSERT_EQ(self->meta->reader.id, 0); + + tracefs_write_int(TRACEFS_ROOT"/tracing_on", 1); + for (int i = 0; i < 16; i++) + tracefs_write_int(TRACEFS_ROOT"/trace_marker", i); +again: + ASSERT_EQ(ioctl(self->cpu_fd, TRACE_MMAP_IOCTL_GET_READER), 0); + + ASSERT_EQ(self->meta->entries, 16); + ASSERT_EQ(self->meta->overrun, 0); + ASSERT_EQ(self->meta->read, 16); + + ASSERT_EQ(self->meta->reader.id, 1); + + if (!(cnt++)) + goto again; +} + +TEST_HARNESS_MAIN -- 2.43.0.429.g432eaa2c6b-goog

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