Deep dive into Kernel

Ubuntu 사용자라면 Kubernetes를 쉽게 시작하기 위한 방법으로 minikube 와 microk8s가 있다. microk8s가 좀더 설치와 사용이 용이하다. 설치 sudo snap install microk8s --classic

https://www.codeproject.com/Articles/874396/Crunching-Numbers-with-AVX-and-AVX

t2.micro at us-east-1[ec2-user@ip-172-16-0-190 ~]$ cat /proc/cpuinfoprocessor : 0vendor_id : GenuineIntelcpu family : 6model : 63model name : Intel(R) Xeon(R) CPU E5-2676 v3 @ 2.40GHzt2.name at us-east-1[ec2-user@ip-172-16-0-116 ~]$ cat /proc/cpuinfoprocessor : 0vendor_id : GenuineIntelcpu family : 6model : 63model name : Intel(R) Xeon(R) CPU E5-2676 v3 @ 2.40GHzt2.medium at us-east-1processor :..

About interrupts name- the last field is interrupt name, for example timer, virtio0-config, nvme0q0 ... About information is generated by show_interrupts function. @kernel/irq/proc.cint show_interrupts(struct seq_file *p, void *v){ static int prec; unsigned long flags, any_count = 0; int i = *(loff_t *) v, j; struct irqaction *action; struct irq_desc *desc; if (i > ACTUAL_NR_IRQS) return 0; if (..

About UEFIUnified Extensible Firmware InterfaceUEFI is designed to replace the Basic Input/Output System(BIOS) firmware interface QEMU UEFI firmware OVMF: Open Virtual Machine FirmwareUEFI: Unified Extensible Firmware Interfaceedk2: Intel's EFI Development Kit II TianoCore = edks2 Build OVMFapt-get install nasm iaslcd /rootgit clone https://github.com/tianocore/edk2.gitcd edk2OvmfPkg/build.sh -a..

IOMMU Event Tracing - What it is and how it can help your distro? http://events.linuxfoundation.org/sites/events/files/slides/iommu_tracing_feb23_2015.pdf IOMMU Event- IOMMU group class events . Add device to IOMMU group (add_device_to_group) . Remove device from IOMMU group (remove_device_from_group)- IOMMU device class events . Attach device to a domain . Detach device from a domain- IOMMU map..

USB Configuration Device DescriptorsThe device descriptor of a USB device represents the entire device. As a result a USB device can only have one device descriptor. It specifies some basic, yet important information about the device such as the supported USB version, maximum packet size, vendor and product IDs and the number of possible configurations the device can have. The format of the devi..

OUT : Host computer --> USB deviceIN : USB device --> Host computer USB endpoint 의 종류 CONTROL : (Asynchronous) control endpoint 는 USB device에 access하기 위해서 사용됨 예를 들어 configure device, retrieving information from device, sending command to the device, retrieving status reports about the device 모든 USB device 는 CONTROL에 해당하는 "endpoint 0"를 가짐 USB device가 insert 될 때 사용됨 guaranteed by the USB protocol ..

USB Device Creation Process

Q35 USB initialization - Create PCI device and initialize it as USB Host Controller (uhci or ehci) EHCI Controller Reference: [1] Enhanced Host Controller Interface Specification for Universal Serial Bushttp://www.intel.co.kr/content/dam/www/public/us/en/documents/technical-specifications/ehci-specification-for-usb.pdf [2] USB in a NutShell : http://www.beyondlogic.org/usbnutshell/usb2.shtml [3]..