![]() | |||||||||||
Messages in this thread |
Bnejamin hello. My name is raz and i have encountered a problem with io_submit. The maximum duration of a single io_submit operation when heavily stressing the system with large number of big (1MB) ios, reaches several hundereds ms. I have been profiling it and it seems that the problem is the file->f_op->aio_read operation, a call that is made in fs/aio.c when coming from: sys_io_submit --> io_submit_one --> aio_run_iocb --> *retry The test is initiating several hundered 1MB IOs over a single block device. I understand that the assumption made was aio_read is asynchronous and no delay will occure, but isn't possible to do it in the workqueue context ? would appreciate your help. thank you raz - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ | ||||||||||
| Last update: 2006-11-15 08:41 [from the cache] ©2003-2008 | |||||||||||