Sched-tools February 2017

sched-tools@lists.linaro.org

6 participants
7 discussions

[PATCH v3] rtapp: Add broader support for specifying cpusets

by Stephen Boyd

From: Olav Haugan <ohaugan(a)codeaurora.org> Allow setting of cpusets at all levels of the spec. Signed-off-by: Olav Haugan <ohaugan(a)codeaurora.org> Tested-by: Dietmar Eggemann <dietmar.eggemann(a)arm.com> Reviewed-by: Dietmar Eggemann <dietmar.eggemann(a)arm.com> Tested-by: Viresh Kumar <viresh.kumar(a)linaro.org> Signed-off-by: Stephen Boyd <stephen.boyd(a)linaro.org> --- v3 changes: -Rebased -Removed unused cpuset and locks variable -Removed include unistd.h v2 changes: -Added documentation and example json -Clarified comments -Added check for invalid CPU -Reduced logging level for affinity setting message -Code fixes based on feedback doc/examples/tutorial/example7.json | 40 ++++++++++++ doc/tutorial.txt | 37 +++++++++++ src/rt-app.c | 119 +++++++++++++++++++++++++++++++----- src/rt-app_parse_config.c | 64 +++++++++++++------ src/rt-app_types.h | 12 +++- 5 files changed, 236 insertions(+), 36 deletions(-) create mode 100644 doc/examples/tutorial/example7.json diff --git a/doc/examples/tutorial/example7.json b/doc/examples/tutorial/example7.json new file mode 100644 index 000000000000..093e4ab3a93b --- /dev/null +++ b/doc/examples/tutorial/example7.json @@ -0,0 +1,40 @@ +{ + /* + * Simple use case which creates a thread with 3 phases each running for + * 1.5ms. In phase 1 the thread will be affined to CPU 0, in phase 2 it + * will be affined to CPU 1 and in the third phase it will be affined to + * CPUs 0-3 (inherit from "cpus" at task level). + */ + "tasks" : { + "thread0" : { + "cpus" : [0,1,2,3], + "phases" : { + "start" : { + "cpus" : [0], + "loop" : 1, + "run" : 1500 + }, + "stop" : { + "cpus" : [1], + "loop" : 1, + "run" : 1500 + }, + "next" : { + "loop" : 1, + "run" : 1500 + } + } + } + }, + "global" : { + "duration" : 2, + "calibration" : "CPU0", + "default_policy" : "SCHED_OTHER", + "pi_enabled" : false, + "lock_pages" : false, + "logdir" : "./", + "log_basename" : "rt-app1", + "ftrace" : true, + "gnuplot" : true + } +} diff --git a/doc/tutorial.txt b/doc/tutorial.txt index d2a99c3e1b84..1b8d14a42c15 100644 --- a/doc/tutorial.txt +++ b/doc/tutorial.txt @@ -232,6 +232,43 @@ below are equals: } } +"cpus" can be specified at task level or phase level. As an example, below +creates two threads. One thread will run with affinity of CPU 2 and 3. The +second task will run first phase with affinity to CPU 0 and 1, second phase with +affinity to CPU 2, and the third phase with affinity to CPU 4, 5, and 6 (it will +inherit the affinity from the task level): + +"task" : { + "thread1" : { + "cpus" : [2,3], + "phases" : { + "phase1" : { + "run" : 10, + "sleep" : 10 + } + } + } + "thread2" : { + "cpus" : [4,5,6], + "phases" : { + "phase1" : { + "cpus" : [0,1], + "run" : 10, + "sleep" : 10 + } + "phase2" : { + "cpus" : [2], + "run" : 10, + "sleep" : 10 + } + "phase3" : { + "run" : 10, + "sleep" : 10 + } + } + } +} + * loop: Integer. Define the number of times the parent object must be run. The parent object can be a phase or a thread. For phase object, the loop defines the number of time the phase will be executed before starting the next diff --git a/src/rt-app.c b/src/rt-app.c index 4123d7b67ce8..c018b9bad687 100644 --- a/src/rt-app.c +++ b/src/rt-app.c @@ -457,6 +457,109 @@ shutdown(int sig) exit(EXIT_SUCCESS); } +static void create_cpuset_str(cpuset_data_t *cpu_data) +{ + unsigned int cpu_count = CPU_COUNT_S(cpu_data->cpusetsize, + cpu_data->cpuset); + unsigned int i; + unsigned int idx = 0; + + /* Assume we can go up to 9999 cpus. Each cpu would take up to 4 + 2 + * bytes (4 for the number and 2 for the comma and space). 2 bytes + * for beginning bracket + space and 2 bytes for end bracket and space + * and finally null-terminator. + */ + unsigned int size_needed = cpu_count * 6 + 2 + 2 + 1; + + cpu_data->cpuset_str = malloc(size_needed); + strcpy(cpu_data->cpuset_str, "[ "); + idx += 2; + + for (i = 0; i < 10000 && cpu_count; ++i) { + unsigned int n; + + if (CPU_ISSET(i, cpu_data->cpuset)) { + --cpu_count; + if (size_needed <= (idx + 1)) { + log_error("Not enough memory for array"); + exit(EXIT_FAILURE); + } + n = snprintf(&cpu_data->cpuset_str[idx], + size_needed - idx - 1, "%d", i); + if (n > 0) { + idx += n; + } else { + log_error("Error creating array"); + exit(EXIT_FAILURE); + } + if (size_needed <= (idx + 1)) { + log_error("Not enough memory for array"); + exit(EXIT_FAILURE); + } + if (cpu_count) { + strncat(cpu_data->cpuset_str, ", ", + size_needed - idx - 1); + idx += 2; + } + } + } + strncat(cpu_data->cpuset_str, " ]", size_needed - idx - 1); +} + +static void set_thread_affinity(thread_data_t *data, cpuset_data_t *cpu_data) +{ + int ret; + cpuset_data_t *actual_cpu_data = &data->cpu_data; + + if (data->def_cpu_data.cpuset == NULL) { + /* Get default affinity */ + cpu_set_t cpuset; + unsigned int cpu_count; + unsigned int cpu = 0; + + ret = pthread_getaffinity_np(pthread_self(), + sizeof(cpu_set_t), &cpuset); + if (ret != 0) { + errno = ret; + perror("pthread_get_affinity"); + exit(EXIT_FAILURE); + } + cpu_count = CPU_COUNT(&cpuset); + data->def_cpu_data.cpusetsize = CPU_ALLOC_SIZE(cpu_count); + data->def_cpu_data.cpuset = CPU_ALLOC(cpu_count); + memcpy(data->def_cpu_data.cpuset, &cpuset, + data->def_cpu_data.cpusetsize); + create_cpuset_str(&data->def_cpu_data); + data->curr_cpu_data = &data->def_cpu_data; + } + + /* Order of preference: + * 1. Phase cpuset + * 2. Task level cpuset + * 3. Default cpuset + */ + if (cpu_data->cpuset != NULL) + actual_cpu_data = cpu_data; + + if (actual_cpu_data->cpuset == NULL) + actual_cpu_data = &data->def_cpu_data; + + if (!CPU_EQUAL(actual_cpu_data->cpuset, data->curr_cpu_data->cpuset)) + { + log_debug("[%d] setting cpu affinity to CPU(s) %s", data->ind, + actual_cpu_data->cpuset_str); + ret = pthread_setaffinity_np(pthread_self(), + actual_cpu_data->cpusetsize, + actual_cpu_data->cpuset); + if (ret != 0) { + errno = ret; + perror("pthread_setaffinity_np"); + exit(EXIT_FAILURE); + } + data->curr_cpu_data = actual_cpu_data; + } +} + void *thread_body(void *arg) { thread_data_t *data = (thread_data_t*) arg; @@ -484,20 +587,6 @@ void *thread_body(void *arg) /* Get the 1st phase's data */ pdata = &data->phases[0]; - /* Set thread affinity */ - if (data->cpuset != NULL) - { - log_notice("[%d] setting cpu affinity to CPU(s) %s", data->ind, - data->cpuset_str); - ret = pthread_setaffinity_np(pthread_self(), sizeof(cpu_set_t), - data->cpuset); - if (ret < 0) { - errno = ret; - perror("pthread_setaffinity_np"); - exit(EXIT_FAILURE); - } - } - /* Set scheduling policy and print pretty info on stdout */ log_notice("[%d] Using %s policy with priority %d", data->ind, data->sched_policy_descr, data->sched_prio); switch (data->sched_policy) @@ -645,6 +734,8 @@ void *thread_body(void *arg) while (continue_running && (i != data->loop)) { struct timespec t_diff, t_rel_start; + set_thread_affinity(data, &pdata->cpu_data); + if (opts.ftrace) log_ftrace(ft_data.marker_fd, "[%d] begins loop %d phase %d step %d", data->ind, i, j, loop); log_debug("[%d] begins loop %d phase %d step %d", data->ind, i, j, loop);; diff --git a/src/rt-app_parse_config.c b/src/rt-app_parse_config.c index c6086f423d2e..d47d3dcc48fd 100644 --- a/src/rt-app_parse_config.c +++ b/src/rt-app_parse_config.c @@ -605,6 +605,41 @@ obj_is_event(char *name) return 0; } +static void parse_cpuset_data(struct json_object *obj, cpuset_data_t *data) +{ + struct json_object *cpuset_obj, *cpu; + unsigned int max_cpu = sysconf(_SC_NPROCESSORS_CONF) - 1; + + /* cpuset */ + cpuset_obj = get_in_object(obj, "cpus", TRUE); + if (cpuset_obj) { + unsigned int i; + unsigned int cpu_idx; + + assure_type_is(cpuset_obj, obj, "cpus", json_type_array); + data->cpuset_str = strdup(json_object_to_json_string(cpuset_obj)); + data->cpusetsize = sizeof(cpu_set_t); + data->cpuset = malloc(data->cpusetsize); + CPU_ZERO(data->cpuset); + for (i = 0; i < json_object_array_length(cpuset_obj); i++) { + cpu = json_object_array_get_idx(cpuset_obj, i); + cpu_idx = json_object_get_int(cpu); + if (cpu_idx > max_cpu) { + log_critical(PIN2 "Invalid cpu %d in cpuset %s", cpu_idx, data->cpuset_str); + free(data->cpuset); + free(data->cpuset_str); + exit(EXIT_INV_CONFIG); + } + CPU_SET(cpu_idx, data->cpuset); + } + } else { + data->cpuset_str = strdup("-"); + data->cpuset = NULL; + data->cpusetsize = 0; + } + log_info(PIN "key: cpus %s", data->cpuset_str); +} + static void parse_thread_phase_data(struct json_object *obj, phase_data_t *data, rtapp_options_t *opts, long tag) @@ -638,6 +673,7 @@ parse_thread_phase_data(struct json_object *obj, i++; } } + parse_cpuset_data(obj, &data->cpu_data); } static void @@ -646,8 +682,8 @@ parse_thread_data(char *name, struct json_object *obj, int index, { char *policy; char def_policy[RTAPP_POLICY_DESCR_LENGTH]; - struct json_object *cpuset_obj, *phases_obj, *cpu, *resources, *locks; - int i, cpu_idx, prior_def; + struct json_object *phases_obj, *resources; + int prior_def; log_info(PFX "Parsing thread %s [%d]", name, index); @@ -656,8 +692,11 @@ parse_thread_data(char *name, struct json_object *obj, int index, data->ind = index; data->name = strdup(name); data->lock_pages = opts->lock_pages; - data->cpuset = NULL; - data->cpuset_str = NULL; + data->cpu_data.cpuset = NULL; + data->cpu_data.cpuset_str = NULL; + data->curr_cpu_data = NULL; + data->def_cpu_data.cpuset = NULL; + data->def_cpu_data.cpuset_str = NULL; /* policy */ policy_to_string(opts->policy, def_policy); @@ -691,22 +730,7 @@ parse_thread_data(char *name, struct json_object *obj, int index, data->deadline = get_int_value_from(obj, "deadline", TRUE, data->period); /* cpuset */ - cpuset_obj = get_in_object(obj, "cpus", TRUE); - if (cpuset_obj) { - assure_type_is(cpuset_obj, obj, "cpus", json_type_array); - data->cpuset_str = strdup(json_object_to_json_string(cpuset_obj)); - data->cpuset = malloc(sizeof(cpu_set_t)); - CPU_ZERO(data->cpuset); - for (i = 0; i < json_object_array_length(cpuset_obj); i++) { - cpu = json_object_array_get_idx(cpuset_obj, i); - cpu_idx = json_object_get_int(cpu); - CPU_SET(cpu_idx, data->cpuset); - } - } else { - data->cpuset_str = strdup("-"); - data->cpuset = NULL; - } - log_info(PIN "key: cpus %s", data->cpuset_str); + parse_cpuset_data(obj, &data->cpu_data); /* initial delay */ data->delay = get_int_value_from(obj, "delay", TRUE, 0); diff --git a/src/rt-app_types.h b/src/rt-app_types.h index 98ec99fbc151..e5f007aa23e3 100644 --- a/src/rt-app_types.h +++ b/src/rt-app_types.h @@ -125,10 +125,17 @@ typedef struct _event_data_t { int count; } event_data_t; +typedef struct _cpuset_data_t { + cpu_set_t *cpuset; + char *cpuset_str; + size_t cpusetsize; +} cpuset_data_t; + typedef struct _phase_data_t { int loop; event_data_t *events; int nbevents; + cpuset_data_t cpu_data; } phase_data_t; typedef struct _thread_data_t { @@ -137,8 +144,9 @@ typedef struct _thread_data_t { int lock_pages; int duration; rtapp_resource_t **resources; - cpu_set_t *cpuset; - char *cpuset_str; + cpuset_data_t cpu_data; /* cpu set information */ + cpuset_data_t *curr_cpu_data; /* Current cpu set being used */ + cpuset_data_t def_cpu_data; /* Default cpu set for task */ unsigned long runtime, deadline, period; -- 2.10.0.297.gf6727b0

8 years

[PATCH] Do not use json-c's is_error() any more

by Dietmar Eggemann

In json-c-0.12 is_error() is defined in bits.h which is exported via json.h. However, json-c's master branch contains commit d4e81f9ec827 which declares bits.h deprecated and removes the export via json.h. Replace the use of is_error() with its trivial implementation to be able to get rid of this single dependency towards the deprecated bits.h. This fixes an issue introduced by commit 17dd99c72a12 ("Clean-up header file inferno") which removed #include <json-c/bits.h> from src/rt-app_parse_config.c. Cc: Olav Haugan <ohaugan(a)codeaurora.org> Signed-off-by: Dietmar Eggemann <dietmar.eggemann(a)arm.com> --- Hi Juri and Vincent, Olav had problems to build rt-app against json-c library (master ?). I didn't spot the error since I used json-c-0.12 when testing 17dd99c72a12. Can you please integrate this little snippet so we can build against master json-c as well? I didn't want to include a deprecated header file. Cheers, Dietmar src/rt-app_parse_config.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/rt-app_parse_config.c b/src/rt-app_parse_config.c index c6086f423d2e..a6e3b591988f 100644 --- a/src/rt-app_parse_config.c +++ b/src/rt-app_parse_config.c @@ -895,7 +895,7 @@ get_opts_from_json_object(struct json_object *root, rtapp_options_t *opts) { struct json_object *global, *tasks, *resources; - if (is_error(root)) { + if (root == NULL) { log_error(PFX "Error while parsing input JSON"); exit(EXIT_INV_CONFIG); } -- 2.11.0

8 years

[PATCH v2] rtapp: Add broader support for specifying cpusets

by Stephen Boyd

From: Olav Haugan <ohaugan(a)codeaurora.org> Allow setting of cpusets at all levels of the spec. Signed-off-by: Olav Haugan <ohaugan(a)codeaurora.org> Signed-off-by: Stephen Boyd <stephen.boyd(a)linaro.org> --- * v2 changes: - Added documentation and example json - Clarified comments - Added check for invalid CPU - Reduced logging level for affinity setting message - Code fixes based on feedback doc/examples/tutorial/example7.json | 40 ++++++++++++ doc/tutorial.txt | 37 +++++++++++ src/rt-app.c | 119 +++++++++++++++++++++++++++++++----- src/rt-app_parse_config.c | 66 ++++++++++++++------ src/rt-app_types.h | 12 +++- 5 files changed, 238 insertions(+), 36 deletions(-) create mode 100644 doc/examples/tutorial/example7.json diff --git a/doc/examples/tutorial/example7.json b/doc/examples/tutorial/example7.json new file mode 100644 index 000000000000..093e4ab3a93b --- /dev/null +++ b/doc/examples/tutorial/example7.json @@ -0,0 +1,40 @@ +{ + /* + * Simple use case which creates a thread with 3 phases each running for + * 1.5ms. In phase 1 the thread will be affined to CPU 0, in phase 2 it + * will be affined to CPU 1 and in the third phase it will be affined to + * CPUs 0-3 (inherit from "cpus" at task level). + */ + "tasks" : { + "thread0" : { + "cpus" : [0,1,2,3], + "phases" : { + "start" : { + "cpus" : [0], + "loop" : 1, + "run" : 1500 + }, + "stop" : { + "cpus" : [1], + "loop" : 1, + "run" : 1500 + }, + "next" : { + "loop" : 1, + "run" : 1500 + } + } + } + }, + "global" : { + "duration" : 2, + "calibration" : "CPU0", + "default_policy" : "SCHED_OTHER", + "pi_enabled" : false, + "lock_pages" : false, + "logdir" : "./", + "log_basename" : "rt-app1", + "ftrace" : true, + "gnuplot" : true + } +} diff --git a/doc/tutorial.txt b/doc/tutorial.txt index d2a99c3e1b84..1b8d14a42c15 100644 --- a/doc/tutorial.txt +++ b/doc/tutorial.txt @@ -232,6 +232,43 @@ below are equals: } } +"cpus" can be specified at task level or phase level. As an example, below +creates two threads. One thread will run with affinity of CPU 2 and 3. The +second task will run first phase with affinity to CPU 0 and 1, second phase with +affinity to CPU 2, and the third phase with affinity to CPU 4, 5, and 6 (it will +inherit the affinity from the task level): + +"task" : { + "thread1" : { + "cpus" : [2,3], + "phases" : { + "phase1" : { + "run" : 10, + "sleep" : 10 + } + } + } + "thread2" : { + "cpus" : [4,5,6], + "phases" : { + "phase1" : { + "cpus" : [0,1], + "run" : 10, + "sleep" : 10 + } + "phase2" : { + "cpus" : [2], + "run" : 10, + "sleep" : 10 + } + "phase3" : { + "run" : 10, + "sleep" : 10 + } + } + } +} + * loop: Integer. Define the number of times the parent object must be run. The parent object can be a phase or a thread. For phase object, the loop defines the number of time the phase will be executed before starting the next diff --git a/src/rt-app.c b/src/rt-app.c index 0f992f5748c4..f6c9ab76cd3b 100644 --- a/src/rt-app.c +++ b/src/rt-app.c @@ -448,6 +448,109 @@ shutdown(int sig) exit(EXIT_SUCCESS); } +static void create_cpuset_str(cpuset_data_t *cpu_data) +{ + unsigned int cpu_count = CPU_COUNT_S(cpu_data->cpusetsize, + cpu_data->cpuset); + unsigned int i; + unsigned int idx = 0; + + /* Assume we can go up to 9999 cpus. Each cpu would take up to 4 + 2 + * bytes (4 for the number and 2 for the comma and space). 2 bytes + * for beginning bracket + space and 2 bytes for end bracket and space + * and finally null-terminator. + */ + unsigned int size_needed = cpu_count * 6 + 2 + 2 + 1; + + cpu_data->cpuset_str = malloc(size_needed); + strcpy(cpu_data->cpuset_str, "[ "); + idx += 2; + + for (i = 0; i < 10000 && cpu_count; ++i) { + unsigned int n; + + if (CPU_ISSET(i, cpu_data->cpuset)) { + --cpu_count; + if (size_needed <= (idx + 1)) { + log_error("Not enough memory for array"); + exit(EXIT_FAILURE); + } + n = snprintf(&cpu_data->cpuset_str[idx], + size_needed - idx - 1, "%d", i); + if (n > 0) { + idx += n; + } else { + log_error("Error creating array"); + exit(EXIT_FAILURE); + } + if (size_needed <= (idx + 1)) { + log_error("Not enough memory for array"); + exit(EXIT_FAILURE); + } + if (cpu_count) { + strncat(cpu_data->cpuset_str, ", ", + size_needed - idx - 1); + idx += 2; + } + } + } + strncat(cpu_data->cpuset_str, " ]", size_needed - idx - 1); +} + +static void set_thread_affinity(thread_data_t *data, cpuset_data_t *cpu_data) +{ + int ret; + cpuset_data_t *actual_cpu_data = &data->cpu_data; + + if (data->def_cpu_data.cpuset == NULL) { + /* Get default affinity */ + cpu_set_t cpuset; + unsigned int cpu_count; + unsigned int cpu = 0; + + ret = pthread_getaffinity_np(pthread_self(), + sizeof(cpu_set_t), &cpuset); + if (ret != 0) { + errno = ret; + perror("pthread_get_affinity"); + exit(EXIT_FAILURE); + } + cpu_count = CPU_COUNT(&cpuset); + data->def_cpu_data.cpusetsize = CPU_ALLOC_SIZE(cpu_count); + data->def_cpu_data.cpuset = CPU_ALLOC(cpu_count); + memcpy(data->def_cpu_data.cpuset, &cpuset, + data->def_cpu_data.cpusetsize); + create_cpuset_str(&data->def_cpu_data); + data->curr_cpu_data = &data->def_cpu_data; + } + + /* Order of preference: + * 1. Phase cpuset + * 2. Task level cpuset + * 3. Default cpuset + */ + if (cpu_data->cpuset != NULL) + actual_cpu_data = cpu_data; + + if (actual_cpu_data->cpuset == NULL) + actual_cpu_data = &data->def_cpu_data; + + if (!CPU_EQUAL(actual_cpu_data->cpuset, data->curr_cpu_data->cpuset)) + { + log_debug("[%d] setting cpu affinity to CPU(s) %s", data->ind, + actual_cpu_data->cpuset_str); + ret = pthread_setaffinity_np(pthread_self(), + actual_cpu_data->cpusetsize, + actual_cpu_data->cpuset); + if (ret != 0) { + errno = ret; + perror("pthread_setaffinity_np"); + exit(EXIT_FAILURE); + } + data->curr_cpu_data = actual_cpu_data; + } +} + void *thread_body(void *arg) { thread_data_t *data = (thread_data_t*) arg; @@ -475,20 +578,6 @@ void *thread_body(void *arg) /* Get the 1st phase's data */ pdata = &data->phases[0]; - /* Set thread affinity */ - if (data->cpuset != NULL) - { - log_notice("[%d] setting cpu affinity to CPU(s) %s", data->ind, - data->cpuset_str); - ret = pthread_setaffinity_np(pthread_self(), sizeof(cpu_set_t), - data->cpuset); - if (ret < 0) { - errno = ret; - perror("pthread_setaffinity_np"); - exit(EXIT_FAILURE); - } - } - /* Set scheduling policy and print pretty info on stdout */ log_notice("[%d] Using %s policy with priority %d", data->ind, data->sched_policy_descr, data->sched_prio); switch (data->sched_policy) @@ -636,6 +725,8 @@ void *thread_body(void *arg) while (continue_running && (i != data->loop)) { struct timespec t_diff, t_rel_start; + set_thread_affinity(data, &pdata->cpu_data); + if (opts.ftrace) log_ftrace(ft_data.marker_fd, "[%d] begins loop %d phase %d step %d", data->ind, i, j, loop); log_debug("[%d] begins loop %d phase %d step %d", data->ind, i, j, loop);; diff --git a/src/rt-app_parse_config.c b/src/rt-app_parse_config.c index e5ef87f6ee3e..06b0cf1232a9 100644 --- a/src/rt-app_parse_config.c +++ b/src/rt-app_parse_config.c @@ -20,6 +20,7 @@ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ #include <json-c/bits.h> #include "rt-app_parse_config.h" +#include <unistd.h> #define PFX "[json] " #define PFL " "PFX @@ -596,6 +597,42 @@ obj_is_event(char *name) return 0; } +static void parse_cpuset_data(struct json_object *obj, cpuset_data_t *data) +{ + struct json_object *cpuset_obj, *cpu; + unsigned int max_cpu = sysconf(_SC_NPROCESSORS_CONF) - 1; + + /* cpuset */ + cpuset_obj = get_in_object(obj, "cpus", TRUE); + if (cpuset_obj) { + struct array_list *cpuset; + unsigned int i; + unsigned int cpu_idx; + + assure_type_is(cpuset_obj, obj, "cpus", json_type_array); + data->cpuset_str = strdup(json_object_to_json_string(cpuset_obj)); + data->cpusetsize = sizeof(cpu_set_t); + data->cpuset = malloc(data->cpusetsize); + CPU_ZERO(data->cpuset); + for (i = 0; i < json_object_array_length(cpuset_obj); i++) { + cpu = json_object_array_get_idx(cpuset_obj, i); + cpu_idx = json_object_get_int(cpu); + if (cpu_idx > max_cpu) { + log_critical(PIN2 "Invalid cpu %d in cpuset %s", cpu_idx, data->cpuset_str); + free(data->cpuset); + free(data->cpuset_str); + exit(EXIT_INV_CONFIG); + } + CPU_SET(cpu_idx, data->cpuset); + } + } else { + data->cpuset_str = strdup("-"); + data->cpuset = NULL; + data->cpusetsize = 0; + } + log_info(PIN "key: cpus %s", data->cpuset_str); +} + static void parse_thread_phase_data(struct json_object *obj, phase_data_t *data, rtapp_options_t *opts, long tag) @@ -629,6 +666,7 @@ parse_thread_phase_data(struct json_object *obj, i++; } } + parse_cpuset_data(obj, &data->cpu_data); } static void @@ -637,8 +675,8 @@ parse_thread_data(char *name, struct json_object *obj, int index, { char *policy; char def_policy[RTAPP_POLICY_DESCR_LENGTH]; - struct json_object *cpuset_obj, *phases_obj, *cpu, *resources, *locks; - int i, cpu_idx, prior_def; + struct json_object *phases_obj, *resources, *locks; + int prior_def; log_info(PFX "Parsing thread %s [%d]", name, index); @@ -647,8 +685,11 @@ parse_thread_data(char *name, struct json_object *obj, int index, data->ind = index; data->name = strdup(name); data->lock_pages = opts->lock_pages; - data->cpuset = NULL; - data->cpuset_str = NULL; + data->cpu_data.cpuset = NULL; + data->cpu_data.cpuset_str = NULL; + data->curr_cpu_data = NULL; + data->def_cpu_data.cpuset = NULL; + data->def_cpu_data.cpuset_str = NULL; /* policy */ policy_to_string(opts->policy, def_policy); @@ -682,22 +723,7 @@ parse_thread_data(char *name, struct json_object *obj, int index, data->deadline = get_int_value_from(obj, "deadline", TRUE, data->period); /* cpuset */ - cpuset_obj = get_in_object(obj, "cpus", TRUE); - if (cpuset_obj) { - assure_type_is(cpuset_obj, obj, "cpus", json_type_array); - data->cpuset_str = strdup(json_object_to_json_string(cpuset_obj)); - data->cpuset = malloc(sizeof(cpu_set_t)); - CPU_ZERO(data->cpuset); - for (i = 0; i < json_object_array_length(cpuset_obj); i++) { - cpu = json_object_array_get_idx(cpuset_obj, i); - cpu_idx = json_object_get_int(cpu); - CPU_SET(cpu_idx, data->cpuset); - } - } else { - data->cpuset_str = strdup("-"); - data->cpuset = NULL; - } - log_info(PIN "key: cpus %s", data->cpuset_str); + parse_cpuset_data(obj, &data->cpu_data); /* initial delay */ data->delay = get_int_value_from(obj, "delay", TRUE, 0); diff --git a/src/rt-app_types.h b/src/rt-app_types.h index 5b8345fcf6aa..95176d4342f8 100644 --- a/src/rt-app_types.h +++ b/src/rt-app_types.h @@ -123,10 +123,17 @@ typedef struct _event_data_t { int count; } event_data_t; +typedef struct _cpuset_data_t { + cpu_set_t *cpuset; + char *cpuset_str; + size_t cpusetsize; +} cpuset_data_t; + typedef struct _phase_data_t { int loop; event_data_t *events; int nbevents; + cpuset_data_t cpu_data; } phase_data_t; typedef struct _thread_data_t { @@ -135,8 +142,9 @@ typedef struct _thread_data_t { int lock_pages; int duration; rtapp_resource_t **resources; - cpu_set_t *cpuset; - char *cpuset_str; + cpuset_data_t cpu_data; /* cpu set information */ + cpuset_data_t *curr_cpu_data; /* Current cpu set being used */ + cpuset_data_t def_cpu_data; /* Default cpu set for task */ unsigned long runtime, deadline, period; -- 2.10.0.297.gf6727b0

8 years

[PATCH 0/3] Miscellaneous Cleanups

by Dietmar Eggemann

Patch 0001, 0002 are easy to digest. Patch 0003 is more invasive. Dietmar Eggemann (3): Move DEFAULT_THREAD_PRIORITY, DEFAULT_THREAD_NICE & PATH_LENGTH to common place Remove BUDGET_OVERP definition Clean-up header file inferno src/rt-app.c | 17 +++++++++++++---- src/rt-app.h | 14 -------------- src/rt-app_args.c | 7 ++++++- src/rt-app_args.h | 19 +------------------ src/rt-app_parse_config.c | 11 ++++++++++- src/rt-app_parse_config.h | 19 ------------------- src/rt-app_types.h | 14 ++++++++------ src/rt-app_utils.c | 7 ++++++- src/rt-app_utils.h | 11 +++-------- 9 files changed, 47 insertions(+), 72 deletions(-) -- 2.11.0

8 years

[PATCH V2] rt-app: Fix broken 'loop' default value

by Viresh Kumar

According to documentation the default value of 'loop' is -1, but the threads without a loop field runs only once and stops. Fix it. Fixes: 3bda96e6e664 ("add phase feature") Signed-off-by: Viresh Kumar <viresh.kumar(a)linaro.org> --- V2: Fixed at a different place and updated Fixes tag as well. src/rt-app_parse_config.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/rt-app_parse_config.c b/src/rt-app_parse_config.c index e5ef87f6ee3e..f06b32162b20 100644 --- a/src/rt-app_parse_config.c +++ b/src/rt-app_parse_config.c @@ -734,7 +734,7 @@ parse_thread_data(char *name, struct json_object *obj, int index, data->phases = malloc(sizeof(phase_data_t) * data->nphases); parse_thread_phase_data(obj, &data->phases[0], opts, (long)data); /* Get loop number */ - data->loop = 1; + data->loop = -1; } } -- 2.7.1.410.g6faf27b

8 years

[PATCH] rt-app: Fix broken 'loop' default value

by Viresh Kumar

According to documentation the default value of 'loop' is -1, but the threads without a loop field runs only once and stops. This was broken long back, perhaps unintentionally though. Fix it. Fixes: 82dae3e5ee2f ("simplify the grammar") Signed-off-by: Viresh Kumar <viresh.kumar(a)linaro.org> --- src/rt-app_parse_config.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/rt-app_parse_config.c b/src/rt-app_parse_config.c index e5ef87f6ee3e..96bd2d299389 100644 --- a/src/rt-app_parse_config.c +++ b/src/rt-app_parse_config.c @@ -605,7 +605,7 @@ parse_thread_phase_data(struct json_object *obj, int i; /* loop */ - data->loop = get_int_value_from(obj, "loop", TRUE, 1); + data->loop = get_int_value_from(obj, "loop", TRUE, -1); /* Count number of events */ data->nbevents = 0; -- 2.7.1.410.g6faf27b

8 years

[PATCH] rtapp: Add broader support for specifying cpusets

by Stephen Boyd

From: Olav Haugan <ohaugan(a)codeaurora.org> Allow setting of cpusets at all levels of the spec. Signed-off-by: Olav Haugan <ohaugan(a)codeaurora.org> Signed-off-by: Stephen Boyd <stephen.boyd(a)linaro.org> --- src/rt-app.c | 119 ++++++++++++++++++++++++++++++++++++++++------ src/rt-app_parse_config.c | 62 +++++++++++++++--------- src/rt-app_types.h | 12 ++++- 3 files changed, 155 insertions(+), 38 deletions(-) diff --git a/src/rt-app.c b/src/rt-app.c index 0f992f5748c4..50922aa2ee03 100644 --- a/src/rt-app.c +++ b/src/rt-app.c @@ -448,6 +448,109 @@ shutdown(int sig) exit(EXIT_SUCCESS); } +static void create_cpuset_str(cpu_data_t *cpu_data) +{ + unsigned int cpu_count = CPU_COUNT_S(cpu_data->cpusetsize, + cpu_data->cpuset); + unsigned int i; + unsigned int idx = 0; + + /* Assume we can go up to 9999 cpus. Each cpu would take up to 4 + 2 + * bytes (4 for the number and 2 for the comma and space). 2 bytes + * for beginning bracket + space and 2 bytes for end bracket and space + * and finally null-terminator. + */ + unsigned int size_needed = cpu_count * 6 + 2 + 2 + 1; + + cpu_data->cpuset_str = malloc(size_needed); + strcpy(cpu_data->cpuset_str, "[ "); + idx += 2; + + for (i = 0; i < 10000 && cpu_count; ++i) { + unsigned int n; + + if (CPU_ISSET(i, cpu_data->cpuset)) { + --cpu_count; + if (size_needed <= (idx + 1)) { + log_error("Not enough memory for array"); + exit(EXIT_FAILURE); + } + n = snprintf(&cpu_data->cpuset_str[idx], + size_needed - idx - 1, "%d", i); + if (n > 0) { + idx += n; + } else { + log_error("Error creating array"); + exit(EXIT_FAILURE); + } + if (size_needed <= (idx + 1)) { + log_error("Not enough memory for array"); + exit(EXIT_FAILURE); + } + if (cpu_count) { + strncat(cpu_data->cpuset_str, ", ", + size_needed - idx - 1); + idx += 2; + } + } + } + strncat(cpu_data->cpuset_str, " ]", size_needed - idx - 1); +} + +static void set_thread_affinity(thread_data_t *data, cpu_data_t *cpu_data) +{ + int ret; + cpu_data_t *actual_cpu_data = &data->cpu_data; + + if (data->def_cpu_data.cpuset == NULL) { + /* Get default affinity */ + cpu_set_t cpuset; + unsigned int cpu_count; + unsigned int cpu = 0; + + ret = pthread_getaffinity_np(pthread_self(), + sizeof(cpu_set_t), &cpuset); + if (ret != 0) { + errno = ret; + perror("pthread_get_affinity"); + exit(EXIT_FAILURE); + } + cpu_count = CPU_COUNT(&cpuset); + data->def_cpu_data.cpusetsize = CPU_ALLOC_SIZE(cpu_count); + data->def_cpu_data.cpuset = CPU_ALLOC(cpu_count); + memcpy(data->def_cpu_data.cpuset, &cpuset, + data->def_cpu_data.cpusetsize); + create_cpuset_str(&data->def_cpu_data); + data->curr_cpu_data = &data->def_cpu_data; + } + + /* Order of preference: + * 1. Phase cpuset + * 2. Global cpuset + * 3. Default cpuset + */ + if (cpu_data->cpuset != NULL) + actual_cpu_data = cpu_data; + + if (actual_cpu_data->cpuset == NULL) + actual_cpu_data = &data->def_cpu_data; + + if (!CPU_EQUAL(actual_cpu_data->cpuset, data->curr_cpu_data->cpuset)) + { + log_notice("[%d] setting cpu affinity to CPU(s) %s", data->ind, + actual_cpu_data->cpuset_str); + ret = pthread_setaffinity_np(pthread_self(), + actual_cpu_data->cpusetsize, + actual_cpu_data->cpuset); + if (ret < 0) { + errno = ret; + perror("pthread_setaffinity_np"); + exit(EXIT_FAILURE); + } + data->curr_cpu_data = actual_cpu_data; + } +} + void *thread_body(void *arg) { thread_data_t *data = (thread_data_t*) arg; @@ -475,20 +578,6 @@ void *thread_body(void *arg) /* Get the 1st phase's data */ pdata = &data->phases[0]; - /* Set thread affinity */ - if (data->cpuset != NULL) - { - log_notice("[%d] setting cpu affinity to CPU(s) %s", data->ind, - data->cpuset_str); - ret = pthread_setaffinity_np(pthread_self(), sizeof(cpu_set_t), - data->cpuset); - if (ret < 0) { - errno = ret; - perror("pthread_setaffinity_np"); - exit(EXIT_FAILURE); - } - } - /* Set scheduling policy and print pretty info on stdout */ log_notice("[%d] Using %s policy with priority %d", data->ind, data->sched_policy_descr, data->sched_prio); switch (data->sched_policy) @@ -636,6 +725,8 @@ void *thread_body(void *arg) while (continue_running && (i != data->loop)) { struct timespec t_diff, t_rel_start; + set_thread_affinity(data, &pdata->cpu_data); + if (opts.ftrace) log_ftrace(ft_data.marker_fd, "[%d] begins loop %d phase %d step %d", data->ind, i, j, loop); log_debug("[%d] begins loop %d phase %d step %d", data->ind, i, j, loop);; diff --git a/src/rt-app_parse_config.c b/src/rt-app_parse_config.c index 83794f35fe97..63f69b0c3a15 100644 --- a/src/rt-app_parse_config.c +++ b/src/rt-app_parse_config.c @@ -631,15 +631,44 @@ parse_thread_phase_data(struct json_object *obj, } } +static void parse_cpuset_data(struct json_object *obj, cpu_data_t *data) +{ + struct json_object *cpuset_obj, *cpu; + + /* cpuset */ + cpuset_obj = get_in_object(obj, "cpus", TRUE); + if (cpuset_obj) { + struct array_list *cpuset; + unsigned int i; + unsigned int cpu_idx; + + assure_type_is(cpuset_obj, obj, "cpus", json_type_array); + data->cpuset_str = strdup(json_object_to_json_string(cpuset_obj)); + data->cpusetsize = sizeof(cpu_set_t); + data->cpuset = malloc(data->cpusetsize); + cpuset = json_object_get_array(cpuset_obj); + CPU_ZERO(data->cpuset); + for (i = 0; i < json_object_array_length(cpuset_obj); i++) { + cpu = json_object_array_get_idx(cpuset_obj, i); + cpu_idx = json_object_get_int(cpu); + CPU_SET(cpu_idx, data->cpuset); + } + } else { + data->cpuset_str = strdup("-"); + data->cpuset = NULL; + data->cpusetsize = 0; + } + log_info(PIN "key: cpus %s", data->cpuset_str); +} + static void parse_thread_data(char *name, struct json_object *obj, int index, thread_data_t *data, rtapp_options_t *opts) { char *policy; char def_policy[RTAPP_POLICY_DESCR_LENGTH]; - struct array_list *cpuset; - struct json_object *cpuset_obj, *phases_obj, *cpu, *resources, *locks; - int i, cpu_idx, prior_def; + struct json_object *phases_obj, *resources, *locks; + int prior_def; log_info(PFX "Parsing thread %s [%d]", name, index); @@ -648,8 +677,11 @@ parse_thread_data(char *name, struct json_object *obj, int index, data->ind = index; data->name = strdup(name); data->lock_pages = opts->lock_pages; - data->cpuset = NULL; - data->cpuset_str = NULL; + data->cpu_data.cpuset = NULL; + data->cpu_data.cpuset_str = NULL; + data->curr_cpu_data = NULL; + data->def_cpu_data.cpuset = NULL; + data->def_cpu_data.cpuset_str = NULL; /* policy */ policy_to_string(opts->policy, def_policy); @@ -683,23 +715,7 @@ parse_thread_data(char *name, struct json_object *obj, int index, data->deadline = get_int_value_from(obj, "deadline", TRUE, data->period); /* cpuset */ - cpuset_obj = get_in_object(obj, "cpus", TRUE); - if (cpuset_obj) { - assure_type_is(cpuset_obj, obj, "cpus", json_type_array); - data->cpuset_str = strdup(json_object_to_json_string(cpuset_obj)); - data->cpuset = malloc(sizeof(cpu_set_t)); - cpuset = json_object_get_array(cpuset_obj); - CPU_ZERO(data->cpuset); - for (i = 0; i < json_object_array_length(cpuset_obj); i++) { - cpu = json_object_array_get_idx(cpuset_obj, i); - cpu_idx = json_object_get_int(cpu); - CPU_SET(cpu_idx, data->cpuset); - } - } else { - data->cpuset_str = strdup("-"); - data->cpuset = NULL; - } - log_info(PIN "key: cpus %s", data->cpuset_str); + parse_cpuset_data(obj, &data->cpu_data); /* initial delay */ data->delay = get_int_value_from(obj, "delay", TRUE, 0); @@ -726,6 +742,7 @@ parse_thread_data(char *name, struct json_object *obj, int index, foreach(phases_obj, entry, key, val, idx) { log_info(PIN "Parsing phase %s", key); parse_thread_phase_data(val, &data->phases[idx], opts, (long)data); + parse_cpuset_data(val, &data->phases[idx].cpu_data); } /* Get loop number */ @@ -735,6 +752,7 @@ parse_thread_data(char *name, struct json_object *obj, int index, data->nphases = 1; data->phases = malloc(sizeof(phase_data_t) * data->nphases); parse_thread_phase_data(obj, &data->phases[0], opts, (long)data); + parse_cpuset_data(obj, &data->phases[0].cpu_data); /* Get loop number */ data->loop = 1; } diff --git a/src/rt-app_types.h b/src/rt-app_types.h index 5b8345fcf6aa..918a2ccc616c 100644 --- a/src/rt-app_types.h +++ b/src/rt-app_types.h @@ -123,10 +123,17 @@ typedef struct _event_data_t { int count; } event_data_t; +typedef struct _cpu_data_t { + cpu_set_t *cpuset; + char *cpuset_str; + size_t cpusetsize; +} cpu_data_t; + typedef struct _phase_data_t { int loop; event_data_t *events; int nbevents; + cpu_data_t cpu_data; } phase_data_t; typedef struct _thread_data_t { @@ -135,8 +142,9 @@ typedef struct _thread_data_t { int lock_pages; int duration; rtapp_resource_t **resources; - cpu_set_t *cpuset; - char *cpuset_str; + cpu_data_t cpu_data; /* cpu set information */ + cpu_data_t *curr_cpu_data; /* Current cpu set being used */ + cpu_data_t def_cpu_data; /* Default cpu set for task */ unsigned long runtime, deadline, period; -- 2.10.0.297.gf6727b0

8 years, 1 month

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Sched-tools February 2017