From: Luke Kenneth Casson Leighton <lkcl@lkcl.net>
To: Libre-RISCV General Development <libre-riscv-dev@lists.libre-riscv.org>
Subject: Re: [libre-riscv-dev] Introduction and Questions
Date: Fri, 15 May 2020 22:55:43 +0100
Message-ID: <CAPweEDy75hwhXiXrUOzXugWLU1m0739YT6gf4WxCdtMFj91LWQ@mail.gmail.com> (raw)
In-Reply-To: <CAC2bXD4udi-tytQQACjZXsq=HURLEJVtianh+BGv0qJp+AVfFQ@mail.gmail.com>
On Fri, May 15, 2020 at 10:20 PM Jacob Lifshay <programmerjake@gmail.com> wrote:
> We will definitely need more stages in the fetch pipeline for branch
> prediction, TLB, and cache handling, I'm guessing 2 or 3 fetch stages.
oh, yes. good catch. ah... ok TLB is deliberately kept to very small
sizes (8 entries max)
so that it can respond in 1 cycle (or, same-cycle). branch prediction and
cache misses, i left out because they're "extra" (but only on misses).
however for higher speeds, TLBs are often cascaded and again end up with
extra misses. that's according to the wikipedia page on TLB :)
l.
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Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-15 18:24 Jeremy Singher
2020-05-15 18:45 ` Yehowshua
2020-05-15 19:15 ` Jeremy Singher
2020-05-15 19:20 ` Yehowshua
2020-05-15 19:24 ` Yehowshua
2020-05-15 19:33 ` Yehowshua
2020-05-15 20:11 ` Luke Kenneth Casson Leighton
2020-05-15 20:50 ` Jeremy Singher
2020-05-15 21:03 ` Yehowshua
2020-05-15 21:19 ` Jacob Lifshay
2020-05-15 21:55 ` Luke Kenneth Casson Leighton [this message]
2020-05-15 21:53 ` Luke Kenneth Casson Leighton
2020-05-15 22:15 ` Jeremy Singher
2020-05-15 22:29 ` Yehowshua
2020-05-15 22:51 ` Luke Kenneth Casson Leighton
2020-05-15 22:47 ` Luke Kenneth Casson Leighton
2020-05-15 23:49 ` Jeremy Singher
2020-05-16 0:40 ` Luke Kenneth Casson Leighton
2020-05-16 9:47 ` Staf Verhaegen
2020-05-16 11:30 ` Staf Verhaegen
2020-05-16 12:30 ` Luke Kenneth Casson Leighton
2020-05-16 20:34 ` Jeremy Singher
2020-05-16 21:42 ` Luke Kenneth Casson Leighton
2020-05-16 9:43 ` Staf Verhaegen
2020-05-16 12:14 ` Luke Kenneth Casson Leighton
2020-05-15 18:47 ` Yehowshua
2020-05-16 12:11 ` Luke Kenneth Casson Leighton
-- strict thread matches above, loose matches on Subject: below --
2020-05-15 6:50 Jeremy Singher
2020-06-06 22:47 ` Yehowshua
2020-06-06 22:48 ` Luke Kenneth Casson Leighton
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