P-FP: Export cluster configuration to /proc.

This patch updated P-FP to support get_domain_proc_info().

1 files changed, 48 insertions, 0 deletions

diff --git a/litmus/sched_pfp.c b/litmus/sched_pfp.c
index 01ac97d7f161..3a0157851702 100644
--- a/litmus/sched_pfp.c
+++ b/litmus/sched_pfp.c
@@ -21,6 +21,8 @@
 #include <litmus/trace.h>
 #include <litmus/budget.h>
 
+/* to set up domain/cpu mappings */
+#include <litmus/litmus_proc.h>
 #include <linux/uaccess.h>
 
 
@@ -1681,6 +1683,43 @@ static long pfp_admit_task(struct task_struct* tsk)
                 return -EINVAL;
 }
 
+static struct domain_proc_info pfp_domain_proc_info;
+static long pfp_get_domain_proc_info(struct domain_proc_info **ret)
+{
+        *ret = &pfp_domain_proc_info;
+        return 0;
+}
+
+static void pfp_setup_domain_proc(void)
+{
+        int i, cpu;
+        int release_master =
+#ifdef CONFIG_RELEASE_MASTER
+                atomic_read(&release_master_cpu);
+#else
+                NO_CPU;
+#endif
+        int num_rt_cpus = num_online_cpus() - (release_master != NO_CPU);
+        struct cd_mapping *cpu_map, *domain_map;
+
+        memset(&pfp_domain_proc_info, sizeof(pfp_domain_proc_info), 0);
+        init_domain_proc_info(&pfp_domain_proc_info, num_rt_cpus, num_rt_cpus);
+        pfp_domain_proc_info.num_cpus = num_rt_cpus;
+        pfp_domain_proc_info.num_domains = num_rt_cpus;
+        for (cpu = 0, i = 0; cpu < num_online_cpus(); ++cpu) {
+                if (cpu == release_master)
+                        continue;
+                cpu_map = &pfp_domain_proc_info.cpu_to_domains[i];
+                domain_map = &pfp_domain_proc_info.domain_to_cpus[i];
+
+                cpu_map->id = cpu;
+                domain_map->id = i; /* enumerate w/o counting the release master */
+                cpumask_set_cpu(i, cpu_map->mask);
+                cpumask_set_cpu(cpu, domain_map->mask);
+                ++i;
+        }
+}
+
 static long pfp_activate_plugin(void)
 {
 #if defined(CONFIG_RELEASE_MASTER) || defined(CONFIG_LITMUS_LOCKING)
@@ -1706,9 +1745,16 @@ static long pfp_activate_plugin(void)
 
 #endif
 
+        pfp_setup_domain_proc();
+
         return 0;
 }
 
+static long pfp_deactivate_plugin(void)
+{
+        destroy_domain_proc_info(&pfp_domain_proc_info);
+        return 0;
+}
 
 /*      Plugin object   */
 static struct sched_plugin pfp_plugin __cacheline_aligned_in_smp = {
@@ -1722,6 +1768,8 @@ static struct sched_plugin pfp_plugin __cacheline_aligned_in_smp = {
         .task_block             = pfp_task_block,
         .admit_task             = pfp_admit_task,
         .activate_plugin        = pfp_activate_plugin,
+        .deactivate_plugin      = pfp_deactivate_plugin,
+        .get_domain_proc_info   = pfp_get_domain_proc_info,
 #ifdef CONFIG_LITMUS_LOCKING
         .allocate_lock          = pfp_allocate_lock,
         .finish_switch          = pfp_finish_switch,