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On Mon, Sep 30, 2019 at 1:27 PM Eric Christopher <echristo at gmail.com> wrote: > On Mon, Sep 30, 2019 at 12:31 PM Sriraman Tallam <tmsriram at google.com> > wrote: > > > > > > > > On Mon, Sep 30, 2019 at 12:26 PM Eric Christopher <echristo at gmail.com> > wrote: > >> > >> On Sat, Sep 28, 2019 at 8:25 AM Sriraman Tallam <tmsriram at google.com> > wrote: > >> >...

...n one of the previous replies I sent. There are other benefits of doing this in linker such as handling prebuilt libraries such as libc. David On Mon, Sep 30, 2019 at 1:39 PM Teresa Johnson <tejohnson at google.com> wrote: > > > On Mon, Sep 30, 2019 at 1:34 PM Sriraman Tallam <tmsriram at google.com> > wrote: > >> >> >> On Mon, Sep 30, 2019 at 1:27 PM Eric Christopher <echristo at gmail.com> >> wrote: >> >>> On Mon, Sep 30, 2019 at 12:31 PM Sriraman Tallam <tmsriram at google.com> >>> wrote: >>> > &g...

...e we always shrink in the first round and always grow in the second. Data shows that our relaxation is efficient. For example, for clang, the aggressive shrinking affects ~995000 branches in 6 iterations and only 4 branches had to be grown back. On Mon, Oct 7, 2019 at 11:17 AM Sriraman Tallam <tmsriram at google.com> wrote: > > The next concern we want to address is about C++ Exceptions which was > considered a major omission: > > TLDR; This can be implemented in propeller easily. It was considered > low priority because exception handling code is assumed in general not >...

On Mon, Sep 30, 2019 at 12:26 PM Eric Christopher <echristo at gmail.com> wrote: > On Sat, Sep 28, 2019 at 8:25 AM Sriraman Tallam <tmsriram at google.com> > wrote: > > > > > > > > On Fri, Sep 27, 2019 at 10:36 PM Eric Christopher <echristo at gmail.com> > wrote: > >> > >> On Fri, Sep 27, 2019 at 2:08 PM Sriraman Tallam via llvm-dev > >> <llvm-dev at lists.llvm.org>...

...increase at all. Krys talked about this earlier. 2) We do deduplication of common static CFI instructions in the FDE and move it to the CIE . Hence, moving to a new basic block does not mean a completely new set of CFI instructions is executed. On Wed, Oct 2, 2019 at 7:24 PM Sriraman Tallam <tmsriram at google.com> wrote: > > Maks and team, thanks for the detailed feedback and we will address all of your > concerns. Let’s begin with CFI and DebugInfo first since this is already > being discussed. > > TLDR; clang is pathological and the actual CFI bloat will go down from 7x...

On Thu, Sep 26, 2019 at 5:13 PM Eli Friedman <efriedma at quicinc.com> wrote: > > > -----Original Message----- > > From: Sriraman Tallam <tmsriram at google.com> > > Sent: Thursday, September 26, 2019 3:24 PM > > To: Eli Friedman <efriedma at quicinc.com> > > Cc: Xinliang David Li <xinliangli at gmail.com>; llvm-dev <llvm-dev at lists.llvm.org> > > Subject: [EXT] Re: [llvm-dev] [RFC] Propeller: A f...

On Thu, Sep 26, 2019 at 12:39 PM Eli Friedman <efriedma at quicinc.com> wrote: > > > > From: Xinliang David Li <xinliangli at gmail.com> > Sent: Wednesday, September 25, 2019 5:58 PM > To: Eli Friedman <efriedma at quicinc.com> > Cc: Sriraman Tallam <tmsriram at google.com>; llvm-dev <llvm-dev at lists.llvm.org> > Subject: [EXT] Re: [llvm-dev] [RFC] Propeller: A frame work for Post Link Optimizations > > > > > > > > On Wed, Sep 25, 2019 at 5:02 PM Eli Friedman via llvm-dev <llvm-dev at lists.llvm.org> wrote: &gt...

On Thu, Sep 26, 2019 at 6:16 PM Eli Friedman <efriedma at quicinc.com> wrote: > > > -----Original Message----- > > From: Sriraman Tallam <tmsriram at google.com> > > Sent: Thursday, September 26, 2019 5:31 PM > > To: Eli Friedman <efriedma at quicinc.com> > > Cc: Xinliang David Li <xinliangli at gmail.com>; llvm-dev <llvm-dev at lists.llvm.org> > > Subject: [EXT] Re: [llvm-dev] [RFC] Propeller: A f...

...:08 PM Sriraman Tallam via llvm-dev > <llvm-dev at lists.llvm.org> wrote: > > > > On Fri, Sep 27, 2019 at 1:16 PM Eli Friedman <efriedma at quicinc.com> > wrote: > > > > > > > -----Original Message----- > > > > From: Sriraman Tallam <tmsriram at google.com> > > > > Sent: Friday, September 27, 2019 9:43 AM > > > > To: Eli Friedman <efriedma at quicinc.com> > > > > Cc: Xinliang David Li <xinliangli at gmail.com>; llvm-dev < > llvm-dev at lists.llvm.org> > > > > Subjec...

On Fri, Sep 27, 2019 at 1:16 PM Eli Friedman <efriedma at quicinc.com> wrote: > > > -----Original Message----- > > From: Sriraman Tallam <tmsriram at google.com> > > Sent: Friday, September 27, 2019 9:43 AM > > To: Eli Friedman <efriedma at quicinc.com> > > Cc: Xinliang David Li <xinliangli at gmail.com>; llvm-dev <llvm-dev at lists.llvm.org> > > Subject: [EXT] Re: [llvm-dev] [RFC] Propeller: A fra...

...From: Fangrui Song <maskray at google.com> > > Sent: Friday, May 29, 2020 1:07 AM > > To: David Blaikie <dblaikie at gmail.com> > > Cc: Robinson, Paul <paul.robinson at sony.com>; Alexey Lapshin > > <alapshin at accesssoftek.com>; Sriraman Tallam <tmsriram at google.com>; Wei Mi > > <wmi at google.com>; Adrian Prantl <aprantl at apple.com>; Jonas Devlieghere > > <jdevlieghere at apple.com>; Alexey Lapshin <a.v.lapshin at mail.ru>; Eric > > Christopher <echristo at gmail.com>; peter.smith at arm.com;...

...appreciate it if you could share it. Further, if you have a recipe to use jemalloc with BOLT, please point it at us. We could try it out too and share our findings. Thanks much, Sri > > > Thanks, > > Maksim > > > > On 10/17/19, 2:59 PM, "Sriraman Tallam" <tmsriram at google.com> wrote: > > > > > > On Wed, Oct 16, 2019 at 3:52 PM Maksim Panchenko <maks at fb.com> wrote: > > Hi Sri, > > > > I want to clarify one thing before sending a detailed reply: did you > evaluate > > BOLT on Clang built with basic blo...

...urce community: "patches are welcome." > > > > Maksim > > > > P.S. We have updated https://github.com/facebookincubator/BOLT with > instructions on running BOLT with jemalloc or tcmalloc. > > > > On 10/18/19, 11:21 AM, "Sriraman Tallam" <tmsriram at google.com> wrote: > > > > Hello Maksim, > > > > On Fri, Oct 18, 2019 at 10:57 AM Maksim Panchenko <maks at fb.com> wrote: > > Cool. The new numbers look good. If you run BOLT with jemalloc library > > preloaded, you will likely get a runtime closer t...

> Subject: Re: [llvm-dev] Range lists, zero-length functions, linker gc > > On 2020-05-28, David Blaikie wrote: > >On Thu, May 28, 2020 at 2:52 PM Robinson, Paul <paul.robinson at sony.com> > >wrote: > > > >> As has been mentioned elsewhere, Sony generally fixes up references > from > >> debug info to stripped functions (of any length) using

...to sacrifice uint32 max - 1 to use as a blessed value here? > >- Dave > > >> >> >> --paulr >> >> >> >> *From:* Alexey Lapshin <alapshin at accesssoftek.com> >> *Sent:* Thursday, May 28, 2020 9:03 AM >> *To:* Sriraman Tallam <tmsriram at google.com>; Wei Mi <wmi at google.com>; >> Robinson, Paul <paul.robinson at sony.com>; Adrian Prantl <aprantl at apple.com>; >> Jonas Devlieghere <jdevlieghere at apple.com>; Alexey Lapshin < >> a.v.lapshin at mail.ru>; Eric Christopher <ech...

On Wed, Sep 25, 2019 at 5:02 PM Eli Friedman via llvm-dev < llvm-dev at lists.llvm.org> wrote: > My biggest question about this architecture is about when propeller runs > basic block reordering within a function. It seems like a lot of the > complexity comes from using the proposed -fbasicblock-sections to generated > mangled ELF, and then re-parsing the mangled ELF as a

...ELRZ, DT_RELRZSZ, DT_RELRZENT, and DT_RELRZCOUNT that all the different parts of the toolchains can agree on. Thanks, Rahul [1]: https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;a=shortlog;h=refs/heads/users/ccoutant/experimental-relr On Mon, May 8, 2017 at 1:55 PM, Sriraman Tallam <tmsriram at google.com> wrote: > +llvm-dev > > Discussion here: https://sourceware.org/ml/gnu-gabi/2017-q2/msg00000.html > > On Tue, May 2, 2017 at 10:17 AM, Suprateeka R Hegde > <hegdesmailbox at gmail.com> wrote: >> On 02-May-2017 12:05 AM, Florian Weimer wrote: >>&g...

...although there might be history behind that tactic that I'm not aware of; it seems like it ought to be unnecessary, if consumers are aware of the special address(es). --paulr From: Alexey Lapshin <alapshin at accesssoftek.com> Sent: Thursday, May 28, 2020 9:03 AM To: Sriraman Tallam <tmsriram at google.com>; Wei Mi <wmi at google.com>; Robinson, Paul <paul.robinson at sony.com>; Adrian Prantl <aprantl at apple.com>; Jonas Devlieghere <jdevlieghere at apple.com>; Alexey Lapshin <a.v.lapshin at mail.ru>; Eric Christopher <echristo at gmail.com>; Fang...

* Rahul Chaudhry via gnu-gabi: > The encoding used is a simple combination of delta-encoding and a > bitmap of offsets. The section consists of 64-bit entries: higher > 8-bits contain delta since last offset, and lower 56-bits contain a > bitmap for which words to apply the relocation to. This is best > described by showing the code for decoding the section: > > typedef

...From: David Blaikie <dblaikie at gmail.com> > > Sent: Friday, May 29, 2020 5:00 PM > > To: Robinson, Paul <paul.robinson at sony.com> > > Cc: Fangrui Song <maskray at google.com>; Alexey Lapshin > > <alapshin at accesssoftek.com>; Sriraman Tallam <tmsriram at google.com>; Wei Mi > > <wmi at google.com>; Adrian Prantl <aprantl at apple.com>; Jonas Devlieghere > > <jdevlieghere at apple.com>; Alexey Lapshin <a.v.lapshin at mail.ru>; Eric > > Christopher <echristo at gmail.com>; peter.smith at arm.com;...