heechul

// =============================================================================
// XNU kperf/kpc demo
// Available for 64-bit Intel/Apple Silicon, macOS/iOS, with root privileges
//
//
// Demo 1 (profile a function in current thread):
// 1. Open directory '/usr/share/kpep/', find your CPU PMC database.
//    For M1 (Pro/Max), the database file is '/usr/share/kpep/a14.plist'.
// 2. Select a few events that you are interested in,
//    add their names to the `profile_events` array below.

heechul

'''
Based the following two code bases:
 - Berkeley's CS188 pacman project code
   http://ai.berkeley.edu/
 - Victor Mayoral Vilches's RL tutorial 
   https://github.com/vmayoral/basic_reinforcement_learning

@author: Heechul Yun ([email protected])
'''

heechul

diff --git a/include/linux/sched.h b/include/linux/sched.h
index 4a1f493..ef258ef 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1179,6 +1179,10 @@ struct sched_entity {
 	u64			exec_start;
 	u64			sum_exec_runtime;
 	u64			vruntime;
+#ifdef CONFIG_CFS_BVT
+	u64			effective_vruntime;

heechul

$ ps -eo pri,nice,rtprio,pid,psr,comm | sort -n 
PRI  NI RTPRIO   PID PSR COMMAND
 14   5      -    31   3 ksmd
 18   1      -  2301   0 rtkit-daemon
 19   0      -  1001   1 upstart-socket-
 19   0      -  1069   0 dbus-daemon
 19   0      -  1092   2 bluetoothd
...
...
 39 -20      -   782   2 iwlwifi

heechul

static inline void arch_spin_unlock(arch_spinlock_t *lock)
{
1:	smp_mb();
	__asm__ __volatile__(
2:"	str	%1, [%0]\n"
	:
	: "r" (&lock->lock), "r" (0)
	: "cc");

3:	dsb_sev();

heechul

static inline void arch_spin_lock(arch_spinlock_t *lock)
{
	unsigned long tmp;
	__asm__ __volatile__(
1: "1:	ldrex	%0, [%1]\n"
2: "	teq	%0, #0\n"
3:	WFE("ne")
4: "	strexeq	%0, %2, [%1]\n"
5: "	teqeq	%0, #0\n"
6: "	bne	1b"

heechul

struct irq_work {
        unsigned long flags;
        struct llist_node llnode;
        void (*func)(struct irq_work *);
};



static inline
void init_irq_work(struct irq_work *work, void (*func)(struct irq_work *))

heechul

struct irq_work {
        unsigned long flags;
        struct llist_node llnode;
        void (*func)(struct irq_work *);
};



static inline
void init_irq_work(struct irq_work *work, void (*func)(struct irq_work *))

heechul

#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <sys/time.h>


#define USECREQ 250
#define LOOPS   1000