From mboxrd@z Thu Jan 1 00:00:00 1970 MIME-Version: 1.0 In-Reply-To: References: <7aa20c07322147e6@orthanc.ca> <20181011230430.8ec148a3cb2a4d95180a4ad2@eigenstate.org> From: hiro <23hiro@gmail.com> Date: Sat, 13 Oct 2018 23:11:33 +0200 Message-ID: To: Fans of the OS Plan 9 from Bell Labs <9fans@9fans.net> Content-Type: text/plain; charset="UTF-8" Subject: Re: [9fans] zero copy & 9p (was Re: PDP11 (Was: Re: what heavy negativity!) Topicbox-Message-UUID: ed5930f6-ead9-11e9-9d60-3106f5b1d025 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 >> >> >