* http://www.v3vee.org\r
*\r
* Copyright (c) 2013, Oscar Mondragon <omondrag@cs.unm.edu>\r
+ * Copyright (c) 2013, Patrick G. Bridges <bridges@cs.unm.edu>\r
* Copyright (c) 2013, The V3VEE Project <http://www.v3vee.org> \r
* All rights reserved.\r
*\r
#include <palacios/vmm_hashtable.h>\r
#include <palacios/vmm_config.h>\r
#include <palacios/vmm_extensions.h>\r
-#include <palacios/vmm_edf_sched.h>\r
-\r
+#include <palacios/vmm_rbtree.h>\r
\r
\r
#ifndef V3_CONFIG_DEBUG_EDF_SCHED\r
#define MAX_SLICE 1000000000\r
#define MIN_SLICE 10000\r
#define CPU_PERCENT 100\r
+typedef uint64_t time_us;\r
+\r
+/* \r
+ * Per-core EDF Scheduling information \r
+ */\r
+\r
+struct vm_core_edf_sched {\r
+ struct guest_info *info; // Core struct\r
+ struct rb_node node; // red-black tree node\r
+ time_us period; // Amount of time (us) during which the core may received a CPU allocation\r
+ time_us slice; // Minimum amount of time (us) received for the core during each period \r
+ time_us current_deadline; // Time (us) at which current core period ends\r
+ time_us used_time; // Amount of time (us) of the slice used whiting the current period\r
+ time_us last_wakeup_time; // Time at which the last wakeup started for this core \r
+ time_us remaining_time; // Remaining time (us) before current core period ends (before current deadline) \r
+ bool extra_time; // Specifies if the virtual core is eligible to receive extra CPU time\r
+ int miss_deadline; // Number of times the core has missed its deadline\r
+ time_us total_time; // Total scheduled time for this core. For now used for debugging purposes \r
+ int slice_overuse; // Statistical purposes\r
+ time_us extra_time_given; // Statistical\r
+};\r
+\r
+/* \r
+ * Scheduler configuration\r
+ */\r
+\r
+struct vm_edf_sched_config {\r
+ time_us min_slice; // Minimum allowed slice\r
+ time_us max_slice; // Maximum allowed slice\r
+ time_us min_period; // Minimum allowed period\r
+ time_us max_period; // Maximum allowed period\r
+ int cpu_percent; // Percentange of CPU utilization for the scheduler in each physical CPU (100 or less)\r
+ \r
+};\r
+\r
+/* \r
+ * Run queue structure. Per-logical core data structure used to keep the runnable virtual cores (threads) allocated to that logical core \r
+ * Contains a pointer to the red black tree, the structure of configuration options and other info\r
+ */\r
+\r
+struct vm_edf_rq{\r
+ \r
+ //int cpu_id; // Physical CPU id\r
+ int cpu_u; // CPU utilization (must be less or equal to the cpu_percent in vm_edf_sched_config) \r
+ struct rb_root vCPUs_tree; // Red-Black Tree\r
+ struct vm_edf_sched_config edf_config; // Scheduling configuration structure\r
+ int nr_vCPU; // Number of cores in the runqueue\r
+ struct vm_core_edf_sched *curr_vCPU; // Current running CPU \r
+ struct rb_node *rb_leftmost; // vCPU with the earliest deadline (leftmost in the tree)\r
+ time_us last_sched_time; // statistical purposes\r
+};\r
+\r
+/* \r
+ * Basic functions for scheduling \r
+ */\r
+\r
+int v3_init_edf_scheduling();\r
+\r
+\r
\r
\r
/*\r
\r
\r
/*\r
- * edf_sched_init: Initialize the run queue\r
+ * priv_data_init: Initialize the run queue\r
*/\r
\r
int \r
-edf_sched_init(struct v3_vm_info *vm){\r
+priv_data_init(struct v3_vm_info *vm){\r
\r
- PrintDebug(vm, VCORE_NONE,"EDF Sched. Initializing vm %s\n", vm->name);\r
+ PrintDebug(vm, VCORE_NONE,"EDF Sched. Initializing EDF Scheduling \n");\r
\r
- struct vm_sched_state *sched_state = &vm->sched; \r
- sched_state->priv_data = V3_Malloc( vm->avail_cores * sizeof(struct vm_edf_rq));\r
+ vm->sched_priv_data = V3_Malloc( vm->avail_cores * sizeof(struct vm_edf_rq));\r
\r
- if (!sched_state->priv_data) {\r
- PrintError(vm, VCORE_NONE,"Cannot allocate in priv_data in edf_sched_init\n");\r
+ if (!vm->sched_priv_data) {\r
+ PrintError(vm, VCORE_NONE,"Cannot allocate in priv_data in priv_data_init\n");\r
return -1;\r
}\r
\r
int lcore = 0;\r
\r
- PrintDebug(vm, VCORE_NONE,"EDF Sched. edf_sched_init. Available cores %d\n", vm->avail_cores);\r
+ PrintDebug(vm, VCORE_NONE,"EDF Sched. priv_data_init. Available cores %d\n", vm->avail_cores);\r
\r
for(lcore = 0; lcore < vm->avail_cores ; lcore++){\r
\r
- PrintDebug(vm, VCORE_NONE,"EDF Sched. edf_sched_init. Initializing logical core %d\n", lcore);\r
+ PrintDebug(vm, VCORE_NONE,"EDF Sched. priv_data_init. Initializing logical core %d\n", lcore);\r
\r
- struct vm_edf_rq * edf_rq_list = (struct vm_edf_rq *) sched_state->priv_data;\r
+ struct vm_edf_rq * edf_rq_list = (struct vm_edf_rq *)vm->sched_priv_data;\r
struct vm_edf_rq * edf_rq = &edf_rq_list[lcore];\r
\r
edf_rq->vCPUs_tree = RB_ROOT;\r
\r
}\r
\r
-\r
/*\r
* is_admissible_core: Decides if a core is admited to the red black tree according with \r
* the admisibility formula.\r
else\r
return false; \r
\r
+return true;\r
}\r
\r
\r
\r
struct vm_edf_rq * get_runqueue(struct guest_info *info){\r
\r
- struct vm_edf_rq *runqueue_list = (struct vm_edf_rq *) info->vm_info->sched.priv_data;\r
+ struct vm_edf_rq *runqueue_list = (struct vm_edf_rq *) info->vm_info->sched_priv_data;\r
struct vm_edf_rq *runqueue = &runqueue_list[info->pcpu_id]; \r
return runqueue;\r
}\r
static void \r
wakeup_core(struct guest_info *info){\r
\r
- struct vm_core_edf_sched *core = info->core_sched.priv_data;\r
+ struct vm_core_edf_sched *core = info->sched_priv_data;\r
struct vm_edf_rq *runqueue = get_runqueue(info);\r
\r
if (!info->core_thread) {\r
PrintError(info->vm_info, info,"Cannot allocate private_data in edf_sched_core_init\n");\r
return -1;\r
}\r
- info->core_sched.priv_data = core_edf;\r
+ info->sched_priv_data = core_edf;\r
\r
// Default configuration if not specified in configuration file \r
\r
static void \r
adjust_slice(struct guest_info * info, int used_time, int extra_time)\r
{\r
- struct vm_core_edf_sched *core = info->core_sched.priv_data;\r
+ struct vm_core_edf_sched *core = info->sched_priv_data;\r
struct vm_edf_rq *runqueue = get_runqueue(info);\r
\r
core->used_time = used_time;\r
static void \r
run_next_core(struct guest_info *info, int used_time, int usec)\r
{\r
- struct vm_core_edf_sched *core = info->core_sched.priv_data;\r
+ struct vm_core_edf_sched *core = info->sched_priv_data;\r
struct vm_core_edf_sched *next_core;\r
struct vm_edf_rq *runqueue = get_runqueue(info);\r
\r
\r
uint64_t host_time = get_curr_host_time(&info->time_state);\r
struct vm_edf_rq *runqueue = get_runqueue(info); \r
- struct vm_core_edf_sched *core = (struct vm_core_edf_sched *) info->core_sched.priv_data;\r
+ struct vm_core_edf_sched *core = (struct vm_core_edf_sched *) info->sched_priv_data;\r
\r
uint64_t used_time = 0;\r
if(core->last_wakeup_time != 0) \r
int \r
edf_sched_deinit(struct v3_vm_info *vm)\r
{\r
-\r
- struct vm_scheduler * sched = vm->sched.sched;\r
- void *priv_data = vm->sched.priv_data;\r
+ void *priv_data = vm->sched_priv_data;\r
\r
- if (sched) \r
- V3_Free(sched); \r
-\r
if (priv_data) \r
V3_Free(priv_data);\r
\r
int \r
edf_sched_core_deinit(struct guest_info *core)\r
{\r
-\r
- struct vm_scheduler * sched = core->core_sched.sched;\r
- void *priv_data = core->core_sched.priv_data;\r
+ void *priv_data = core->sched_priv_data;\r
\r
- if (sched) \r
- V3_Free(sched); \r
-\r
if (priv_data) \r
V3_Free(priv_data);\r
\r
return 0;\r
}\r
\r
+int edf_sched_vm_init(struct v3_vm_info *vm){\r
+ return 0;\r
+}\r
+\r
+int edf_sched_admit(struct v3_vm_info *vm){\r
+\r
+ /*\r
+ * Initialize priv_data for the vm: \r
+ * For EDF this is done here because we need the parameter\r
+ * avail_core which is set in v3_start_vm before the\r
+ * v3_scheduler_admit_vm function is called.\r
+ */\r
+ \r
+ priv_data_init(vm);\r
+\r
+ // TODO Admission\r
+ \r
+ return 0;\r
+}\r
+\r
+\r
static struct vm_scheduler_impl edf_sched = {\r
- .name = "edf",\r
- .init = edf_sched_init,\r
- .deinit = edf_sched_deinit,\r
- .core_init = edf_sched_core_init,\r
- .core_deinit = edf_sched_core_deinit,\r
- .schedule = edf_sched_schedule,\r
- .yield = edf_sched_yield\r
+\r
+ .name = "edf",\r
+ .init = NULL,\r
+ .deinit = NULL,\r
+ .vm_init = edf_sched_vm_init,\r
+ .vm_deinit = NULL,\r
+ .core_init = edf_sched_core_init,\r
+ .core_deinit = edf_sched_core_deinit,\r
+ .schedule = edf_sched_schedule,\r
+ .yield = edf_sched_yield,\r
+ .admit = edf_sched_admit,\r
+ .remap = NULL,\r
+ .dvfs=NULL\r
};\r
\r
static int \r
ext_sched_edf_init() {\r
- \r
PrintDebug(VM_NONE, VCORE_NONE,"Sched. Creating (%s) scheduler\n",edf_sched.name);\r
return v3_register_scheduler(&edf_sched);\r
}\r
