Hello, On Tue, Oct 04, 2016 at 06:22:28PM +0200, Paolo Valente wrote: > Could you please elaborate more on this point? BFQ uses sectors > served to measure service, and, on the all the fast devices on which > we have tested it, it accurately distributes > bandwidth as desired, redistributes excess bandwidth with any issue, > and guarantees high responsiveness and low latency at application and > system level (e.g., ~0 drop rate in video playback, with any background > workload tested). The same argument as before. Bandwidth is a very bad measure of IO resources spent. For specific use cases (like desktop or whatever), this can work but not generally. > Could you please suggest me some test to show how sector-based > guarantees fails? Well, mix 4k random and sequential workloads and try to distribute the acteual IO resources. Thanks. -- tejun -- To unsubscribe from this list: send the line "unsubscribe linux-block" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
