On linux, there are commands for almost everything, because the gui might not be always available. When working on servers only shell access is available and everything has to be done from these commands. So today we shall be checking the commands that can be used to check memory usage on...
Check Linux memory usage with the free command To check available free memory and swaps, use thefreecommand. Just run the command like bellow, no root privilege required. free -h It's worth to pass few more command line arguments to get more convenient results. ...
CMA区域的创建有两种方法,一种是通过dts的reserved memory,另外一种是通过command line参数和内核配置参数。 dts方式: reserved-memory { /* global autoconfigured region for contiguous allocations */ linux,cma { compatible = "shared-dma-pool"; reusable; size = <0 0x28000000>; alloc-ranges = <0 0x...
即可以传输到设备也可以从设备传出,返回物理地址 scratch_addr = dma_map_single(..., DMA_BIDIRECTIONAL); dwc->scratch_addr = scratch_addr // 保存物理地址 param = lower_32_bits(scratch_addr) // 获取低32位物理地址 dwc3_send_gadget_generic_command(..., DWC3_DGCMD_SET_SCRATCHPAD_ADDR_LO,...
$ valgrind --tool=memcheck --leak-check=full ./val ==2888== Memcheck, a memory error detector ==2888== Copyright (C) 2002-2009, and GNU GPL'd, by Julian Seward et al. ==2888== Using Valgrind-3.6.0.SVN-Debian and LibVEX; rerun with -h for copyright info ==2888== Command: ...
DRAM(Dynamic Random Access Memory),即动态随机存取存储器,最为常见的系统内存。ECC是“Error Checking and Correcting”的简写,中文名称是“错误检查和纠正”。ECC内存,即应用了能够实现错误检查和纠正技术(ECC)的内存条。EDAC,即Error Detection And Correction(错误检测与纠正)。
分析Memory使用状况 内存是影响服务器性能的一个主要因素, 当进程已经驻留内存或者系能够分配给进程足够的内存给它, CPU能顺利自如的运行. 如果发生内存不足, 服务器使用I/O channel获取数据, 由于访问I/O channel速度大约比访问内存满1000倍, 这会给服务器带了性能问题. ...
MEMORY: 崩溃主机的物理内存 PANIC: 崩溃类型,常见的崩溃类型包括: SysRq (System Request):通过魔法组合键导致的系统崩溃,通常是测试使用。通过 echo c > /proc/sysrq-trigger,就可以触发系统崩溃。 oops:可以看成是内核级的 Segmentation Fault。应用程序如果进行了非法内存访问或执行了非法指令,会得到 Segfault ...
CMA区域的创建有两种方法,一种是通过dts的reserved memory,另外一种是通过command line参数和内核配置参数。 dts方式: reserved-memory { /* global autoconfigured region for contiguous allocations */ linux,cma { compatible = "shared-dma-pool";
您可以使用各种协议在企业级配置和管理Remote Directory Memory Access (RDMA)网络和 InfiniBand 硬件。这包括 RDMA over Converged Ethernet (RoCE)、RoCE (Soft-RoCE)的软件实现、IP 网络协议,如 iWARP、iWARP (Soft-iWARP)的软件实现,以及通过 RDMA (NFSoRDMA)协议的网络文件系统,作为...