diff options
Diffstat (limited to 'tools/testing/selftests/resctrl/resctrl.h')
| -rw-r--r-- | tools/testing/selftests/resctrl/resctrl.h | 145 |
1 files changed, 120 insertions, 25 deletions
diff --git a/tools/testing/selftests/resctrl/resctrl.h b/tools/testing/selftests/resctrl/resctrl.h index a33f414f60..2051bd135e 100644 --- a/tools/testing/selftests/resctrl/resctrl.h +++ b/tools/testing/selftests/resctrl/resctrl.h @@ -28,6 +28,12 @@ #define PHYS_ID_PATH "/sys/devices/system/cpu/cpu" #define INFO_PATH "/sys/fs/resctrl/info" +/* + * CPU vendor IDs + * + * Define as bits because they're used for vendor_specific bitmask in + * the struct resctrl_test. + */ #define ARCH_INTEL 1 #define ARCH_AMD 2 @@ -37,20 +43,52 @@ #define DEFAULT_SPAN (250 * MB) -#define PARENT_EXIT(err_msg) \ +#define PARENT_EXIT() \ do { \ - perror(err_msg); \ kill(ppid, SIGKILL); \ umount_resctrlfs(); \ exit(EXIT_FAILURE); \ } while (0) /* + * user_params: User supplied parameters + * @cpu: CPU number to which the benchmark will be bound to + * @bits: Number of bits used for cache allocation size + * @benchmark_cmd: Benchmark command to run during (some of the) tests + */ +struct user_params { + int cpu; + int bits; + const char *benchmark_cmd[BENCHMARK_ARGS]; +}; + +/* + * resctrl_test: resctrl test definition + * @name: Test name + * @group: Test group - a common name for tests that share some characteristic + * (e.g., L3 CAT test belongs to the CAT group). Can be NULL + * @resource: Resource to test (e.g., MB, L3, L2, etc.) + * @vendor_specific: Bitmask for vendor-specific tests (can be 0 for universal tests) + * @disabled: Test is disabled + * @feature_check: Callback to check required resctrl features + * @run_test: Callback to run the test + */ +struct resctrl_test { + const char *name; + const char *group; + const char *resource; + unsigned int vendor_specific; + bool disabled; + bool (*feature_check)(const struct resctrl_test *test); + int (*run_test)(const struct resctrl_test *test, + const struct user_params *uparams); +}; + +/* * resctrl_val_param: resctrl test parameters * @resctrl_val: Resctrl feature (Eg: mbm, mba.. etc) * @ctrlgrp: Name of the control monitor group (con_mon grp) * @mongrp: Name of the monitor group (mon grp) - * @cpu_no: CPU number to which the benchmark would be binded * @filename: Name of file to which the o/p should be written * @bw_report: Bandwidth report type (reads vs writes) * @setup: Call back function to setup test environment @@ -59,12 +97,20 @@ struct resctrl_val_param { char *resctrl_val; char ctrlgrp[64]; char mongrp[64]; - int cpu_no; char filename[64]; char *bw_report; unsigned long mask; int num_of_runs; - int (*setup)(struct resctrl_val_param *param); + int (*setup)(const struct resctrl_test *test, + const struct user_params *uparams, + struct resctrl_val_param *param); +}; + +struct perf_event_read { + __u64 nr; /* The number of events */ + struct { + __u64 value; /* The value of the event */ + } values[2]; }; #define MBM_STR "mbm" @@ -72,6 +118,13 @@ struct resctrl_val_param { #define CMT_STR "cmt" #define CAT_STR "cat" +/* + * Memory location that consumes values compiler must not optimize away. + * Volatile ensures writes to this location cannot be optimized away by + * compiler. + */ +extern volatile int *value_sink; + extern pid_t bm_pid, ppid; extern char llc_occup_path[1024]; @@ -79,42 +132,84 @@ extern char llc_occup_path[1024]; int get_vendor(void); bool check_resctrlfs_support(void); int filter_dmesg(void); -int get_resource_id(int cpu_no, int *resource_id); +int get_domain_id(const char *resource, int cpu_no, int *domain_id); int mount_resctrlfs(void); int umount_resctrlfs(void); int validate_bw_report_request(char *bw_report); -bool validate_resctrl_feature_request(const char *resource, const char *feature); +bool resctrl_resource_exists(const char *resource); +bool resctrl_mon_feature_exists(const char *resource, const char *feature); +bool resource_info_file_exists(const char *resource, const char *file); +bool test_resource_feature_check(const struct resctrl_test *test); char *fgrep(FILE *inf, const char *str); -int taskset_benchmark(pid_t bm_pid, int cpu_no); -int write_schemata(char *ctrlgrp, char *schemata, int cpu_no, - char *resctrl_val); +int taskset_benchmark(pid_t bm_pid, int cpu_no, cpu_set_t *old_affinity); +int taskset_restore(pid_t bm_pid, cpu_set_t *old_affinity); +int write_schemata(char *ctrlgrp, char *schemata, int cpu_no, const char *resource); int write_bm_pid_to_resctrl(pid_t bm_pid, char *ctrlgrp, char *mongrp, char *resctrl_val); int perf_event_open(struct perf_event_attr *hw_event, pid_t pid, int cpu, int group_fd, unsigned long flags); -int run_fill_buf(size_t span, int memflush, int op, bool once); -int resctrl_val(const char * const *benchmark_cmd, struct resctrl_val_param *param); -int mbm_bw_change(int cpu_no, const char * const *benchmark_cmd); +unsigned char *alloc_buffer(size_t buf_size, int memflush); +void mem_flush(unsigned char *buf, size_t buf_size); +void fill_cache_read(unsigned char *buf, size_t buf_size, bool once); +int run_fill_buf(size_t buf_size, int memflush, int op, bool once); +int resctrl_val(const struct resctrl_test *test, + const struct user_params *uparams, + const char * const *benchmark_cmd, + struct resctrl_val_param *param); void tests_cleanup(void); void mbm_test_cleanup(void); -int mba_schemata_change(int cpu_no, const char * const *benchmark_cmd); void mba_test_cleanup(void); -int get_cbm_mask(char *cache_type, char *cbm_mask); -int get_cache_size(int cpu_no, char *cache_type, unsigned long *cache_size); +unsigned long create_bit_mask(unsigned int start, unsigned int len); +unsigned int count_contiguous_bits(unsigned long val, unsigned int *start); +int get_full_cbm(const char *cache_type, unsigned long *mask); +int get_mask_no_shareable(const char *cache_type, unsigned long *mask); +int get_cache_size(int cpu_no, const char *cache_type, unsigned long *cache_size); +int resource_info_unsigned_get(const char *resource, const char *filename, unsigned int *val); void ctrlc_handler(int signum, siginfo_t *info, void *ptr); int signal_handler_register(void); void signal_handler_unregister(void); -int cat_val(struct resctrl_val_param *param, size_t span); void cat_test_cleanup(void); -int cat_perf_miss_val(int cpu_no, int no_of_bits, char *cache_type); -int cmt_resctrl_val(int cpu_no, int n, const char * const *benchmark_cmd); unsigned int count_bits(unsigned long n); void cmt_test_cleanup(void); -int get_core_sibling(int cpu_no); -int measure_cache_vals(struct resctrl_val_param *param, int bm_pid); -int show_cache_info(unsigned long sum_llc_val, int no_of_bits, - size_t cache_span, unsigned long max_diff, - unsigned long max_diff_percent, unsigned long num_of_runs, - bool platform, bool cmt); + +void perf_event_attr_initialize(struct perf_event_attr *pea, __u64 config); +void perf_event_initialize_read_format(struct perf_event_read *pe_read); +int perf_open(struct perf_event_attr *pea, pid_t pid, int cpu_no); +int perf_event_reset_enable(int pe_fd); +int perf_event_measure(int pe_fd, struct perf_event_read *pe_read, + const char *filename, int bm_pid); +int measure_llc_resctrl(const char *filename, int bm_pid); +void show_cache_info(int no_of_bits, __u64 avg_llc_val, size_t cache_span, bool lines); + +/* + * cache_portion_size - Calculate the size of a cache portion + * @cache_size: Total cache size in bytes + * @portion_mask: Cache portion mask + * @full_cache_mask: Full Cache Bit Mask (CBM) for the cache + * + * Return: The size of the cache portion in bytes. + */ +static inline unsigned long cache_portion_size(unsigned long cache_size, + unsigned long portion_mask, + unsigned long full_cache_mask) +{ + unsigned int bits = count_bits(full_cache_mask); + + /* + * With no bits the full CBM, assume cache cannot be split into + * smaller portions. To avoid divide by zero, return cache_size. + */ + if (!bits) + return cache_size; + + return cache_size * count_bits(portion_mask) / bits; +} + +extern struct resctrl_test mbm_test; +extern struct resctrl_test mba_test; +extern struct resctrl_test cmt_test; +extern struct resctrl_test l3_cat_test; +extern struct resctrl_test l3_noncont_cat_test; +extern struct resctrl_test l2_noncont_cat_test; #endif /* RESCTRL_H */ |