Changeset 629 for trunk/kernel/kern/scheduler.c

Timestamp:

May 17, 2019, 9:27:04 AM (5 years ago)

Author:

alain

Message:

Remove the "giant" rwlock protecting the GPT, and
use the GPT_LOCKED attribute in each PTE to prevent
concurrent modifications of one GPT entry.
The version number has been incremented to 2.1.

File:

• trunk/kernel/kern/scheduler.c (modified) (5 diffs)

trunk/kernel/kern/scheduler.c

@@ -63 +63 @@
 // @ returns pointer on selected thread descriptor
 ////////////////////////////////////////////////////////////////////////////////////////////
-thread_t * sched_select( scheduler_t * sched )
+static thread_t * sched_select( scheduler_t * sched )
 {
     thread_t     * thread;
@@ -248 +248 @@
 uint32_t cycle = (uint32_t)hal_get_cycles();
 if( DEBUG_SCHED_HANDLE_SIGNALS < cycle )
-printk("\n[%s] thread[%x,%x] on core[%x,%d] deleted / %d threads / cycle %d\n",
+printk("\n[%s] thread[%x,%x] on core[%x,%d] deleted (still %d threads) / cycle %d\n",
 __FUNCTION__, process->pid, thread->trdid, local_cxy, thread->core->lid, count, cycle );
+#endif
+
+#if CONFIG_INSTRUMENTATION_PGFAULTS
+uint32_t local_nr    = thread->info.local_pgfault_nr;
+uint32_t local_cost  = (local_nr == 0)  ? 0 : (thread->info.local_pgfault_cost / local_nr);
+uint32_t global_nr   = thread->info.global_pgfault_nr;
+uint32_t global_cost = (global_nr == 0) ? 0 : (thread->info.global_pgfault_cost / global_nr);
+uint32_t false_nr    = thread->info.false_pgfault_nr;
+uint32_t false_cost  = (false_nr == 0)  ? 0 : (thread->info.false_pgfault_cost / false_nr);
+printk("***** page faults for thread[%x,%x]\n" 
+       "  - %d local  : %d cycles\n"
+       "  - %d global : %d cycles\n"
+       "  - %d false  : %d cycles\n",
+       process->pid, thread->trdid,
+       local_nr,  local_cost,
+       global_nr, global_cost,
+       false_nr,  false_cost );
 #endif
             // destroy process descriptor if last thread
@@ -481 +498 @@
  
 #if (DEBUG_SCHED_YIELD & 0x1)
-// if( sched->trace )
-if( (uint32_t)hal_get_cycles() > DEBUG_SCHED_YIELD )
+if( sched->trace )
 sched_display( lid );
 #endif
@@ -535 +551 @@
 
 #if DEBUG_SCHED_YIELD
-// if( sched->trace )
-if( (uint32_t)hal_get_cycles() > DEBUG_SCHED_YIELD )
+if( sched->trace )
 printk("\n[%s] core[%x,%d] / cause = %s\n"
 "      thread %x (%s) (%x,%x) => thread %x (%s) (%x,%x) / cycle %d\n",
@@ -553 +568 @@
 
 #if (DEBUG_SCHED_YIELD & 1)
-// if( sched->trace )
-if( (uint32_t)hal_get_cycles() > DEBUG_SCHED_YIELD )
+if( sched->trace )
 printk("\n[%s] core[%x,%d] / cause = %s\n"
 "      thread %x (%s) (%x,%x) continue / cycle %d\n",