Re: [PATCH v2 2/2] index-pack: support multithreaded delta resolving

> Nguyen Thai Ngoc Duy <pclouds@gmail.com> writes:
>
>> 2012/3/12 Thomas Rast <trast@inf.ethz.ch>:
>>> Nguyễn Thái Ngọc Duy <pclouds@gmail.com> writes:
>>>
>>>> This puts delta resolving on each base on a separate thread, one base
>>>> cache per thread. Per-thread data is grouped in struct thread_local.
>>>> When running with nr_threads == 1, no pthreads calls are made. The
>>>> system essentially runs in non-thread mode.
>>>
>>> As discussed when we took the git-grep measurements, it may be
>>> interesting to have a way to run 1 thread.  Can you put in such an
>>> option?
>>
>> Sorry I wasn't clear, nr_threads == 1 is equivalent to --threads=1. So
>> yes it supports running in non-thread mode.
>
> Well, in that case I wasn't clear: I meant that there should be a way to
> run with the whole threading machinery enabled, but still only have one
> thread (doing the work, possibly having another that fills the queue).
>
> That allows us to see how big the overhead is.