{"id":113046,"date":"2024-01-22T11:28:02","date_gmt":"2024-01-22T09:28:02","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/dlya-yadra-linux-podgotovleny-optimizaczii-povyshayushhie-proizvoditelnost-planirovshhikov-vvoda-vyvoda"},"modified":"2024-01-22T11:28:02","modified_gmt":"2024-01-22T09:28:02","slug":"dlya-yadra-linux-podgotovleny-optimizaczii-povyshayushhie-proizvoditelnost-planirovshhikov-vvoda-vyvoda","status":"publish","type":"post","link":"https:\/\/prohoster.info\/en\/blog\/news\/dlya-yadra-linux-podgotovleny-optimizaczii-povyshayushhie-proizvoditelnost-planirovshhikov-vvoda-vyvoda","title":{"rendered":"Optimizations have been prepared for the Linux kernel to improve I\/O scheduler performance","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"
Jens Axboe, the creator of io_uring and the CFQ, Deadline, and Noop I\/O schedulers, has continued his experiments with I\/O optimization in the Linux kernel. This time, he focused on the BFQ and mq-deadline I\/O schedulers, which turned out to be bottlenecks, at least in the case of high-speed NVMe drives. <\/p>\n
An analysis of the situation revealed that one of the key reasons for the suboptimal performance of input\/output scheduler subsystems was issues with lock contention (the attempt to acquire a lock held by another thread). Thanks to measures aimed at reducing competition for lock handling, such as dispatch serialization and request queuing, the performance of the schedulers increased significantly in several scenarios (in IOPS). <\/p>\n
When testing the BFQ scheduler using the fio utility, performance increased from 567K to 1551K I\/O operations per second, and lock contention dropped from 96% to 30%. In the case of mq-deadline, performance after applying the proposed patches with NVMe storage rose from 1070K to 2560K I\/O operations per second (IOPS), and lock contention decreased from 94% to 23%. \n Source: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"