blktrace是一个用于追踪块设备(如磁盘)I/O操作的工具。它的原理是利用Linux内核中的blktrace模块,以及与之配合使用的ftrace和perf工具。 blktrace的工作流程如下: 1.用户通过blktrace命令启动blktrace进程,并指定要追踪的块设备。 2. blktrace进程会通过ioctl系统调用,向内核注册一个或多个blktrace设备。 3.内核在...
pull the master tree from: git://git.kernel.dk/blktrace.git For browsing the repo over http and viewing history etc, you can direct your browser to:http://git.kernel.dk/Usage --- $ blktrace -d <dev> [ -r debug_path ] [ -o output ] [ -k ] [ -w time ] [ -a action ]...
blktrace是一个开源工具,用于在Linux系统中追踪块设备的操作。通过blktrace,用户可以获得有关块设备I/O的详细信息,包括读写请求、提交时间、完成时间、I/O大小等。这些信息对于系统性能调优、故障排除、磁盘性能评估等方面都非常有用。 使用blktrace的第一步是安装工具。大多数Linux发行版都包含blktrace,因此可以通过...
G2I — time from a request is allocated to the time it is Inserted into the device's queue Q2M — time from a block I/O is queued to the time it gets merged with an existing request I2D — time from a request is inserted into the device's queue to the time it is actually is...
I2D — time from a request is inserted into the device's queue to the time it is actually issued to the device M2D — time from a block I/O is merged with an exiting request until the request is issued to the device D2C — service time of the request by the device ...
blktrace在这种场合就能派上用场,因为它能记录I/O所经历的各个步骤,从中可以分析是IO Scheduler慢还是硬件响应慢。 blktrace的原理 一个I/O请求进入block layer之后,可能会经历下面的过程: Remap: 可能被DM(Device Mapper)或MD(Multiple Device, Software RAID) remap到其它设备...
so if you have git installed, you can pull the master tree from: git://git.kernel.dk/blktrace.git For browsing the repo over http and viewing history etc, you can direct your browser to:http://git.kernel.dk/A blktrace visualization tool, iowatcher, was added to blktrace in version ...
blktrace_1.2.0-5.debian.tar.xz13.6 KiB2022-Apr-11 03:20 blktrace_1.2.0.orig.tar.bz2385.9 KiB2022-Apr-11 03:20 blktrace-dbgsym_1.2.0-5_i386.deb409.9 KiB2022-Apr-11 03:26 blktrace-dbgsym_1.2.0-5_amd64.deb431.9 KiB2022-Apr-11 03:30 ...