From mboxrd@z Thu Jan 1 00:00:00 1970 MIME-Version: 1.0 In-Reply-To: <4A1686D0-C80C-417F-A3D6-3F9EA327D35F@lsub.org> References: <7aa20c07322147e6@orthanc.ca> <20181011230430.8ec148a3cb2a4d95180a4ad2@eigenstate.org> <4A1686D0-C80C-417F-A3D6-3F9EA327D35F@lsub.org> From: hiro <23hiro@gmail.com> Date: Sun, 14 Oct 2018 09:34:26 +0200 Message-ID: To: Fans of the OS Plan 9 from Bell Labs <9fans@9fans.net> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Subject: Re: [9fans] zero copy & 9p (was Re: PDP11 (Was: Re: what heavy negativity!) Topicbox-Message-UUID: ed6bfbe6-ead9-11e9-9d60-3106f5b1d025 well, finding bugs is always good :) but since i got curious could you also tell which things exactly got much faster, so that we know what might be possible? On 10/14/18, FJ Ballesteros wrote: > yes. bugs, on my side at least. > The copy isolates from others. > But some experiments in nix and in a thing I wrote for leanxcale show tha= t > some things can be much faster. > It=E2=80=99s fun either way. > >> El 13 oct 2018, a las 23:11, hiro <23hiro@gmail.com> escribi=C3=B3: >> >> and, did it improve anything noticeably? >> >>> On 10/13/18, Charles Forsyth wrote: >>> I did several versions of one part of zero copy, inspired by several >>> things >>> in x-kernel, replacing Blocks by another structure throughout the >>> network >>> stacks and kernel, then made messages visible to user level. Nemo did >>> another part, on his way to Clive >>> >>>> On Fri, 12 Oct 2018, 07:05 Ori Bernstein, wrote: >>>> >>>> On Thu, 11 Oct 2018 13:43:00 -0700, Lyndon Nerenberg >>>> >>>> wrote: >>>> >>>>> Another case to ponder ... We're handling the incoming I/Q data >>>>> stream, but need to fan that out to many downstream consumers. If >>>>> we already read the data into a page, then flip it to the first >>>>> consumer, is there a benefit to adding a reference counter to that >>>>> read-only page and leaving the page live until the counter expires? >>>>> >>>>> Hiro clamours for benchmarks. I agree. Some basic searches I've >>>>> done don't show anyone trying this out with P9 (and publishing >>>>> their results). Anybody have hints/references to prior work? >>>>> >>>>> --lyndon >>>>> >>>> >>>> I don't believe anyone has done the work yet. I'd be interested >>>> to see what you come up with. >>>> >>>> >>>> -- >>>> Ori Bernstein >>>> >>>> >>> >> > > >