From: Junio C Hamano <gitster@pobox.com>
Date: Tue, 25 Aug 2015 21:12:37 GMT
Subject: Re: [PATCH 4/5] index-pack: Use the new worker pool
Message-ID: <xmqq37z7xebe.fsf@gitster.dls.corp.google.com>
In-Reply-To: <CAGZ79kZ9V35KmJSExt=EqYFcyOSysaFsJA0E+dx46Qg+Pm+Ybg@mail.gmail.com>

Stefan Beller <sbeller@google.com> writes:

> Not sure I follow there.
>
> Original implementation:
> We have M threads sitting around the table, all of them trying to obtain food
> from the one bowl on the table and then eating it.
> Once the bowl is all eaten, we can stop.
>
> New pattern:
> One cook puts all the food items on the sushi-go-round-belt with a fancy plate
> and the threads grab them one by one still using locks (but they are internal to
> the belt).
>
> Are you saying we're content with just a bowl and everyone helps themselves
> for getting food?

No.  I am questioning how big overhead is for having the
go-round-belt that must hold all dishes to be eaten, which did not
exist in the original arrangement.