[PATCH gnumach] kdb: Add "show all runqs" debug command

[Damien Zammit]

---
 ddb/db_command.c  |  1 +
 ddb/db_print.c    | 27 +++++++++++++++++++++++++++
 ddb/db_print.h    |  6 ++++++
 kern/sched_prim.h |  1 +
 4 files changed, 35 insertions(+)

diff --git a/ddb/db_command.c b/ddb/db_command.c
index d21386e6..2fae61b0 100644
--- a/ddb/db_command.c
+++ b/ddb/db_command.c
@@ -309,6 +309,7 @@ struct db_command db_show_all_cmds[] = {
        { "tasks",      db_show_all_tasks,      0,      0 },
        { "threads",    db_show_all_threads,    0,      0 },
        { "slocks",     (db_command_fun_t)db_show_all_slocks,   0,      0 },
+       { "runqs",      (db_command_fun_t)db_show_all_runqs,    0,      0 },
        { (char *)0 }
 };
 
diff --git a/ddb/db_print.c b/ddb/db_print.c
index 3fbafe74..89250f7b 100644
--- a/ddb/db_print.c
+++ b/ddb/db_print.c
@@ -39,6 +39,9 @@
 #include <kern/task.h>
 #include <kern/thread.h>
 #include <kern/queue.h>
+#include <kern/sched.h>
+#include <kern/processor.h>
+#include <kern/smp.h>
 #include <ipc/ipc_port.h>
 #include <ipc/ipc_space.h>
 
@@ -329,6 +332,30 @@ db_show_all_tasks(db_expr_t addr,
            }
 }
 
+static void showrq(run_queue_t rq)
+{
+       db_printf("count(%d) low(%d)\n", rq->count, rq->low);
+}
+
+/*ARGSUSED*/
+void
+db_show_all_runqs(
+       db_expr_t       addr,
+       boolean_t       have_addr,
+       db_expr_t       count,
+       const char *    modif)
+{
+       int i;
+
+       db_printf("Processor set runq:\t");
+       showrq(&default_pset.runq);
+       for (i = 0; i < smp_get_numcpus(); i++) {
+           db_printf("Processor #%d runq:\t", i);
+           showrq(&cpu_to_processor(i)->runq);
+       }
+       db_printf("Stuck threads:\t%d", stuck_count);
+}
+
 /*ARGSUSED*/
 void
 db_show_all_threads(
diff --git a/ddb/db_print.h b/ddb/db_print.h
index 87db97be..27b3990a 100644
--- a/ddb/db_print.h
+++ b/ddb/db_print.h
@@ -50,6 +50,12 @@ void db_show_all_threads(
        db_expr_t       count,
        const char *    modif);
 
+void db_show_all_runqs(
+       db_expr_t       addr,
+       int             have_addr,
+       db_expr_t       count,
+       const char *    modif);
+
 db_addr_t db_task_from_space(
        ipc_space_t     space,
        int             *task_id);
diff --git a/kern/sched_prim.h b/kern/sched_prim.h
index 405e5456..c250b220 100644
--- a/kern/sched_prim.h
+++ b/kern/sched_prim.h
@@ -184,5 +184,6 @@ void thread_check(thread_t th, run_queue_t rq);
 
 extern void idle_thread(void) __attribute__((noreturn));
 extern void sched_thread(void);
+extern int stuck_count;
 
 #endif /* _KERN_SCHED_PRIM_H_ */
-- 
2.40.1