low level. Then apply stable clock. Note: XDDR2SEL should be High level to hold CKE to low. 2. Set the PhyControl0.ctrl_start_pointand PhyControl0.ctrl_incbit-fields to correct value according to clock frequency. Set the PhyControl0.ctrl_dll_onbit-field to ‘1’ to turn on thePHY...
check_preempt_tick(cfs_rq, curr); } cfs_rq->nr_running可以理解为当前 cpu 上,公平调度类型的就绪进程和运行进程的和,大于 1 表示有待调度的就绪进程,于是调用check_preempt_tick: // kernel/sched/fair.c:4023 static void check_preempt_tick(struct cfs_rq *cfs_rq, struct sched_entity *curr) { ...
soc { compatible = "simple-bus"; #address-cells = <1>; #size-cells = <1>; ranges = <0x0 0xe0000000 0x00100000>; serial { device_type = "serial"; compatible = "ns16550"; reg = <0x4600 0x100>; clock-frequency = <0>; interrupts = <0xA 0x8>; interrupt-parent = <&ipic>;...
CPU相关的启动参数: mce # Enable the machine check exception feature. nosmp #Run as a single-processor machine. 不使用SMP(多处理器) max_cpus #max_cpus=n, SMP系统最多能使用的CPU个数(即使系统中有大于n个的CPU) Ramdisk相关的启动参数: initrd #指定初始化ramdisk的位置,initrd=filename noinitrd ...
Gfx Frequency Set to fixed value as low as possible according to proper workload Memory Frequency SA GV Fixed High 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 2. 硬件 除处理器外,内存方面,使用双通道内存,尽可能高的内存频率。
而在linux内核中是无法使用printf函数的,取而代之的是printk函数。printk在内核源码中用来记录日志信息的函数,只能在内核源码范围内使用,用法类似于printf函数。 一个较大的差别在于printk支持多种日志级别,从而允许printk根据消息的等级选择性进行打印。 printk函数主要做两件事情: ...
check_preempt_curr 会根据当前进程的调度类型,执行对应的方法: // kernel/sched/core.c:854 voidcheck_preempt_curr(struct rq *rq, struct task_struct *p,intflags){ ... // rq 是当前 cpu 上的进程队列 // curr 是当前正在 cpu 运行的进程 ...
checkddr4_pmu_train_imemcodepass[0.2489080.001196]checkddr4_pmu_train_dmemcode[0.2495120.000604]checkddr4_pmu_train_dmemcodepass[0.3757720.126260]TrainingPASS[0.4237290.047957]NormalBoot[0.4239980.000269]TryingtobootfromMMC1[1.0326590.608661]...
CPU: Intel 9900KF P1 Frequency 3.6Ghz 1-core Turbo 5.0Ghz HT-disabled RAM: 16GB DDR4-3200 Ubuntu 19.04: Kernel 5.0.0-38-generic X86_64 Boot Parameter: BOOT_IMAGE=/boot/vmlinuz-5.0.0-38-generic root=UUID=697aea9f-2de2-4b9c-921d-5bd5f963c91f ro ipv6.disable=1isolcpus=7 nohz...
frequency = <0x61a80>; }; i2c@e0005000 { compatible = "cdns,i2c-r1p10-slave"; status = "okay"; clocks = <0x1 0x27>; interrupt-parent = <0x4>; interrupts = <0x0 0x30 0x4>; reg = <0xe0005000 0x1000>; #address-cells = <0x1>; #size-cells = <0x0>; clock-frequency = ...