On Sun, Jan 15, 2012 at 07:01:42PM -0500, Zheng Da wrote: > Hello, > > I surprisedly found that writing data to a file (no appending) with direct > IO and with multiple threads has the same performance as a single thread. > Actually, it seems there is only one core is working at a time. In my case, > each time I write a page to a file and the offset is always aligned to the > page size, so there is no overlapping between writes. What kernel version are you using? Also, what is the exact I/O pattern? _______________________________________________ xfs mailing list xfs@xxxxxxxxxxx http://oss.sgi.com/mailman/listinfo/xfs
