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charset="UTF-8" X-Rspamd-Server: rspam04 X-Rspam-User: X-Stat-Signature: nogfbdwzm4j9mqng5jhg8oqyfpzrdp14 X-Rspamd-Queue-Id: DB74F8000B X-HE-Tag: 1789745616-605920 X-HE-Meta: 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 22sq3OT1 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 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: During tearing tests, smaps_rollup Pss* metrics should stay constant. Extend /proc/pid/smaps tearing tests to also check for smaps_rollup consistency. Signed-off-by: Suren Baghdasaryan Acked-by: Lorenzo Stoakes (ARM) --- tools/testing/selftests/proc/proc-maps-race.c | 186 +++++++++++++++++- 1 file changed, 181 insertions(+), 5 deletions(-) diff --git a/tools/testing/selftests/proc/proc-maps-race.c b/tools/testing/selftests/proc/proc-maps-race.c index 415eccb70468..bf4c5073f6fc 100644 --- a/tools/testing/selftests/proc/proc-maps-race.c +++ b/tools/testing/selftests/proc/proc-maps-race.c @@ -80,6 +80,61 @@ enum maps_file { struct vma_modifier_info; +enum smaps_rollup_stat { + Rss, + Pss, + Pss_Dirty, + Pss_Anon, + Pss_File, + Pss_Shmem, + Shared_Clean, + Shared_Dirty, + Private_Clean, + Private_Dirty, + Referenced, + Anonymous, + KSM, + LazyFree, + AnonHugePages, + ShmemPmdMapped, + FilePmdMapped, + Shared_Hugetlb, + Private_Hugetlb, + Swap, + SwapPss, + Locked, + RollupFieldCount +}; + +static const char *smaps_rollup_stat_names[RollupFieldCount] = { + "Rss", + "Pss", + "Pss_Dirty", + "Pss_Anon", + "Pss_File", + "Pss_Shmem", + "Shared_Clean", + "Shared_Dirty", + "Private_Clean", + "Private_Dirty", + "Referenced", + "Anonymous", + "KSM", + "LazyFree", + "AnonHugePages", + "ShmemPmdMapped", + "FilePmdMapped", + "Shared_Hugetlb", + "Private_Hugetlb", + "Swap", + "SwapPss", + "Locked", +}; + +struct smaps_rollup_stats { + unsigned long values[RollupFieldCount]; +}; + FIXTURE(proc_maps_race) { struct vma_modifier_info *mod_info; @@ -91,6 +146,7 @@ FIXTURE(proc_maps_race) enum maps_file maps_file; int shared_mem_size; int skip_pages; + int rollup_fd; int page_size; int vma_count; bool verbose; @@ -132,12 +188,12 @@ struct vma_modifier_info { void *child_mapped_addr[]; }; -static bool read_page(FIXTURE_DATA(proc_maps_race) *self, +static bool read_page(FIXTURE_DATA(proc_maps_race) *self, int fd, struct page_content *page) { ssize_t bytes_read; - bytes_read = read(self->maps_fd, page->data, self->page_size); + bytes_read = read(fd, page->data, self->page_size); if (bytes_read <= 0) return false; @@ -175,7 +231,7 @@ static int locate_containing_page(FIXTURE_DATA(proc_maps_race) *self, char *curr_pos; char *end_pos; - if (!read_page(self, &self->page1)) + if (!read_page(self, self->maps_fd, &self->page1)) return -1; curr_pos = self->page1.data; @@ -205,10 +261,11 @@ static bool read_two_pages(FIXTURE_DATA(proc_maps_race) *self) return false; for (int i = 0; i < self->skip_pages; i++) - if (!read_page(self, &self->page1)) + if (!read_page(self, self->maps_fd, &self->page1)) return false; - return read_page(self, &self->page1) && read_page(self, &self->page2); + return read_page(self, self->maps_fd, &self->page1) && + read_page(self, self->maps_fd, &self->page2); } static void copy_line(const char *line_start, const char *line_end, @@ -317,6 +374,61 @@ static bool read_boundary_lines(FIXTURE_DATA(proc_maps_race) *self, &first_line->end_addr) == 2; } +static bool parse_smaps_rollup(FIXTURE_DATA(proc_maps_race) *self, + struct smaps_rollup_stats *stats) +{ + unsigned int dev_maj, dev_min, inode; + unsigned long start, end, offs; + unsigned long value; + char name[32], perm[5]; + char *curr_pos; + char *end_pos; + char *line_end; + + if (lseek(self->rollup_fd, 0, SEEK_SET) < 0) + return false; + + if (!read_page(self, self->rollup_fd, &self->page1)) + return false; + + curr_pos = self->page1.data; + end_pos = self->page1.data + self->page1.size; + + line_end = strchr(curr_pos, '\n'); + if (!line_end) + return false; + + if (sscanf(curr_pos, "%lx-%lx %4s %lx %u:%u %u %31s", + &start, &end, perm, &offs, &dev_maj, &dev_min, &inode, name) != 8) + return false; + + if (strcmp(name, "[rollup]")) + return false; + + for (int stat = 0; stat < ARRAY_SIZE(smaps_rollup_stat_names); stat++) { + int len; + + curr_pos = line_end + 1; + if (curr_pos >= end_pos) + return false; + + line_end = strchr(curr_pos, '\n'); + if (!line_end) + return false; + + if (sscanf(curr_pos, "%31s %lu kB", name, &value) != 2) + return false; + + len = strlen(name); + if (name[len - 1] != ':' || strncmp(name, smaps_rollup_stat_names[stat], len - 1)) + return false; + + stats->values[stat] = value; + } + + return true; +} + /* Thread synchronization routines */ static void wait_for_state(struct vma_modifier_info *mod_info, enum test_state state) { @@ -397,6 +509,40 @@ static bool print_boundaries_on(bool condition, const char *title, return condition; } +static void print_smaps_rollup_stats(const char *title, FIXTURE_DATA(proc_maps_race) *self, + struct smaps_rollup_stats *stats) +{ + printf("%s", title); + for (int stat = 0; stat < ARRAY_SIZE(smaps_rollup_stat_names); stat++) + printf("%64s %lu kB\n", smaps_rollup_stat_names[stat], stats->values[stat]); +} + +static bool cmp_smaps_rollup_stat(struct smaps_rollup_stats *s1, + struct smaps_rollup_stats *s2, enum smaps_rollup_stat stat) +{ + return s1->values[stat] == s2->values[stat]; +} + +static bool compare_smaps_rollup(FIXTURE_DATA(proc_maps_race) *self, + struct smaps_rollup_stats *expected, + struct smaps_rollup_stats *actual) +{ + /* + * Clean/dirty metrics might change but Pss-related ones + * should stay constant. + */ + if (cmp_smaps_rollup_stat(expected, actual, Pss) && + cmp_smaps_rollup_stat(expected, actual, Pss_Anon) && + cmp_smaps_rollup_stat(expected, actual, Pss_File) && + cmp_smaps_rollup_stat(expected, actual, Pss_Shmem)) + return true; + + print_smaps_rollup_stats("Expected stats:", self, expected); + print_smaps_rollup_stats("Actual stats:", self, actual); + + return false; +} + static void report_test_start(const char *name, bool verbose) { if (verbose) @@ -572,6 +718,7 @@ FIXTURE_SETUP(proc_maps_race) unsigned long first_map_addr; unsigned long last_map_addr; unsigned long duration_sec; + char rollup_fname[32]; char fname[32]; self->page_size = (unsigned long)sysconf(_SC_PAGESIZE); @@ -649,6 +796,9 @@ FIXTURE_SETUP(proc_maps_race) break; case SMAPS: sprintf(fname, "/proc/%d/smaps", self->pid); + sprintf(rollup_fname, "/proc/%d/smaps_rollup", self->pid); + self->rollup_fd = open(rollup_fname, O_RDONLY); + ASSERT_NE(self->rollup_fd, -1); break; default: ksft_exit_fail(); @@ -711,6 +861,8 @@ FIXTURE_TEARDOWN(proc_maps_race) for (int i = 0; i < self->vma_count; i++) munmap(self->mod_info->child_mapped_addr[i], self->page_size); close(self->maps_fd); + if (self->maps_file == SMAPS) + close(self->rollup_fd); waitpid(self->pid, &status, 0); munmap(self->mod_info, self->shared_mem_size); } @@ -723,6 +875,7 @@ TEST_F(proc_maps_race, test_maps_tearing_from_split) struct line_content split_first_line; struct line_content restored_last_line; struct line_content restored_first_line; + struct smaps_rollup_stats orig_stats; wait_for_state(mod_info, SETUP_READY); @@ -736,6 +889,8 @@ TEST_F(proc_maps_race, test_maps_tearing_from_split) report_test_start("Tearing from split", self->verbose); ASSERT_TRUE(capture_mod_pattern(self, &split_last_line, &split_first_line, &restored_last_line, &restored_first_line)); + if (self->maps_file == SMAPS) + ASSERT_TRUE(parse_smaps_rollup(self, &orig_stats)); /* Now start concurrent modifications for self->duration_sec */ signal_state(mod_info, TEST_READY); @@ -799,6 +954,11 @@ TEST_F(proc_maps_race, test_maps_tearing_from_split) vma_end == self->last_line.end_addr) || (vma_start == split_first_line.start_addr && vma_end == split_first_line.end_addr)); + } else { + struct smaps_rollup_stats stats; + + ASSERT_TRUE(parse_smaps_rollup(self, &stats)); + ASSERT_TRUE(compare_smaps_rollup(self, &orig_stats, &stats)); } clock_gettime(CLOCK_MONOTONIC_COARSE, &end_ts); end_test_iteration(&end_ts, self->verbose); @@ -817,6 +977,7 @@ TEST_F(proc_maps_race, test_maps_tearing_from_resize) struct line_content shrunk_first_line; struct line_content restored_last_line; struct line_content restored_first_line; + struct smaps_rollup_stats orig_stats; wait_for_state(mod_info, SETUP_READY); @@ -830,6 +991,8 @@ TEST_F(proc_maps_race, test_maps_tearing_from_resize) report_test_start("Tearing from resize", self->verbose); ASSERT_TRUE(capture_mod_pattern(self, &shrunk_last_line, &shrunk_first_line, &restored_last_line, &restored_first_line)); + if (self->maps_file == SMAPS) + ASSERT_TRUE(parse_smaps_rollup(self, &orig_stats)); /* Now start concurrent modifications for self->duration_sec */ signal_state(mod_info, TEST_READY); @@ -880,6 +1043,11 @@ TEST_F(proc_maps_race, test_maps_tearing_from_resize) ASSERT_TRUE(vma_start == self->last_line.start_addr && (vma_end - vma_start == self->page_size * 3 || vma_end - vma_start == self->page_size)); + } else { + struct smaps_rollup_stats stats; + + ASSERT_TRUE(parse_smaps_rollup(self, &stats)); + ASSERT_TRUE(compare_smaps_rollup(self, &orig_stats, &stats)); } clock_gettime(CLOCK_MONOTONIC_COARSE, &end_ts); end_test_iteration(&end_ts, self->verbose); @@ -898,6 +1066,7 @@ TEST_F(proc_maps_race, test_maps_tearing_from_remap) struct line_content remapped_first_line; struct line_content restored_last_line; struct line_content restored_first_line; + struct smaps_rollup_stats orig_stats; wait_for_state(mod_info, SETUP_READY); @@ -911,6 +1080,8 @@ TEST_F(proc_maps_race, test_maps_tearing_from_remap) report_test_start("Tearing from remap", self->verbose); ASSERT_TRUE(capture_mod_pattern(self, &remapped_last_line, &remapped_first_line, &restored_last_line, &restored_first_line)); + if (self->maps_file == SMAPS) + ASSERT_TRUE(parse_smaps_rollup(self, &orig_stats)); /* Now start concurrent modifications for self->duration_sec */ signal_state(mod_info, TEST_READY); @@ -963,6 +1134,11 @@ TEST_F(proc_maps_race, test_maps_tearing_from_remap) vma_end - vma_start == self->page_size * 3) || (vma_start == self->last_line.start_addr + self->page_size && vma_end - vma_start == self->page_size)); + } else { + struct smaps_rollup_stats stats; + + ASSERT_TRUE(parse_smaps_rollup(self, &stats)); + ASSERT_TRUE(compare_smaps_rollup(self, &orig_stats, &stats)); } clock_gettime(CLOCK_MONOTONIC_COARSE, &end_ts); end_test_iteration(&end_ts, self->verbose); -- 2.55.0.1082.g2b9226bbc0-goog