diff options
Diffstat (limited to 'kernel/trace/trace_osnoise.c')
| -rw-r--r-- | kernel/trace/trace_osnoise.c | 28 |
1 files changed, 22 insertions, 6 deletions
diff --git a/kernel/trace/trace_osnoise.c b/kernel/trace/trace_osnoise.c index 17b77fe3950b..3f10dd1f2f1c 100644 --- a/kernel/trace/trace_osnoise.c +++ b/kernel/trace/trace_osnoise.c @@ -53,12 +53,13 @@ */ enum osnoise_options_index { OSN_DEFAULTS = 0, + OSN_WORKLOAD, OSN_MAX }; -static const char * const osnoise_options_str[OSN_MAX] = { "DEFAULTS" }; +static const char * const osnoise_options_str[OSN_MAX] = { "DEFAULTS", "OSNOISE_WORKLOAD" }; -#define OSN_DEFAULT_OPTIONS 0 +#define OSN_DEFAULT_OPTIONS 0x2 unsigned long osnoise_options = OSN_DEFAULT_OPTIONS; /* @@ -1186,11 +1187,12 @@ trace_sched_switch_callback(void *data, bool preempt, unsigned int prev_state) { struct osnoise_variables *osn_var = this_cpu_osn_var(); + int workload = test_bit(OSN_WORKLOAD, &osnoise_options); - if (p->pid != osn_var->pid) + if ((p->pid != osn_var->pid) || !workload) thread_exit(osn_var, p); - if (n->pid != osn_var->pid) + if ((n->pid != osn_var->pid) || !workload) thread_entry(osn_var, n); } @@ -1723,9 +1725,16 @@ static void stop_kthread(unsigned int cpu) struct task_struct *kthread; kthread = per_cpu(per_cpu_osnoise_var, cpu).kthread; - if (kthread) + if (kthread) { kthread_stop(kthread); - per_cpu(per_cpu_osnoise_var, cpu).kthread = NULL; + per_cpu(per_cpu_osnoise_var, cpu).kthread = NULL; + } else { + if (!test_bit(OSN_WORKLOAD, &osnoise_options)) { + per_cpu(per_cpu_osnoise_var, cpu).sampling = false; + barrier(); + return; + } + } } /* @@ -1759,6 +1768,13 @@ static int start_kthread(unsigned int cpu) snprintf(comm, 24, "timerlat/%d", cpu); main = timerlat_main; } else { + /* if no workload, just return */ + if (!test_bit(OSN_WORKLOAD, &osnoise_options)) { + per_cpu(per_cpu_osnoise_var, cpu).sampling = true; + barrier(); + return 0; + } + snprintf(comm, 24, "osnoise/%d", cpu); } |