On Fri, Apr 13, 2012 at 10:38:05AM +0800, Liu Yuan wrote: > Thanks for your test numbers, I didn't expect this large threads to > run not-so-fast disk busy. > How many cpus do you have on your box? I think this number has a > great dependency with the host available cpu number. This was on a 2 core box, but it's been a while. It would be good to reproduce the numbers before making decisions based on hearsay. > I am not sure, I'd love to set 64 as default since our servers has a > considerable cpu cores, but for the boxes with limited cpus (Say, only > 2), is 64 threads okay for them too(Do not waste memory resource for > unnecessary task_struct)? We spend about 10 to 12kb on each kernel thread. I don't think that adds up for a less than a hundred thread, but we of course still have the option. |