search for: heroic

I am a professor at UC Santa Cruz, but I also do consulting a Huawei. Chris Lattner told me that I should post this in the llvm-dev. HiSilicon (Santa Clara office) is looking for some developer capable of implementing the "heroic optimizations" (http://llvm.org/devmtg/2015-10/slides/Gerolf-PerformanceImprovementsAndHeadroom.pdf) in LLVM. Focus on SPEC2006 but also looking at the new SPEC2017. The goal is to match, or get closer, to the Intel compiler with SPEC2006. ICC has a significant advantage. As the talk sho...

...pu2006 ? Or something else in cpu2017 ? -Thx Dibyendu -----Original Message----- From: llvm-dev [mailto:llvm-dev-bounces at lists.llvm.org] On Behalf Of Tobias Grosser via llvm-dev Sent: Wednesday, August 16, 2017 10:10 AM To: renau at uncore.io; llvm-dev at lists.llvm.org Subject: Re: [llvm-dev] Heroic LLVM optimizations Hi Jose, we have work based on Polly which should get the loop-fusion in SPEC2017. The code is not yet ready to share, but I would be interested to learn if this would be of use to you. Best, Tobias On Wed, Aug 16, 2017, at 00:15, renau at uncore.io via llvm-dev wrote: >...

...gt;> >>-----Original Message----- >>From: llvm-dev [mailto:llvm-dev-bounces at lists.llvm.org] On Behalf Of >>Tobias Grosser via llvm-dev >>Sent: Wednesday, August 16, 2017 10:10 AM >>To: renau at uncore.io; llvm-dev at lists.llvm.org >>Subject: Re: [llvm-dev] Heroic LLVM optimizations >> >>Hi Jose, >> >>we have work based on Polly which should get the loop-fusion in >>SPEC2017. >>The code is not yet ready to share, but I would be interested to learn >>if >>this would be of use to you. >> >>Best, &gt...

...> https://lkml.org/lkml/2018/8/2/322 > > > > In particular the OOM notifier is worse than the shrinker because: > > The issue is that DEFLATE_ON_OOM is under-specified. > > > > > 1. It is last-resort, which means the system has already gone through > > heroics to prevent OOM. Those heroic reclaim efforts are expensive > > and impact application performance. > > That's *exactly* what "deflate on OOM" suggests. > It seems there are some use cases where "deflate on OOM" is desired and others where "deflate o...

...> https://lkml.org/lkml/2018/8/2/322 > > > > In particular the OOM notifier is worse than the shrinker because: > > The issue is that DEFLATE_ON_OOM is under-specified. > > > > > 1. It is last-resort, which means the system has already gone through > > heroics to prevent OOM. Those heroic reclaim efforts are expensive > > and impact application performance. > > That's *exactly* what "deflate on OOM" suggests. > It seems there are some use cases where "deflate on OOM" is desired and others where "deflate o...

There were apparently good reasons for moving away from OOM notifier callback: https://lkml.org/lkml/2018/7/12/314 https://lkml.org/lkml/2018/8/2/322 In particular the OOM notifier is worse than the shrinker because: 1. It is last-resort, which means the system has already gone through heroics to prevent OOM. Those heroic reclaim efforts are expensive and impact application performance. 2. It lacks understanding of NUMA or other OOM constraints. 3. It has a higher potential for bugs due to the subtlety of the callback context. Given the above, I think the shrinker API certa...

There were apparently good reasons for moving away from OOM notifier callback: https://lkml.org/lkml/2018/7/12/314 https://lkml.org/lkml/2018/8/2/322 In particular the OOM notifier is worse than the shrinker because: 1. It is last-resort, which means the system has already gone through heroics to prevent OOM. Those heroic reclaim efforts are expensive and impact application performance. 2. It lacks understanding of NUMA or other OOM constraints. 3. It has a higher potential for bugs due to the subtlety of the callback context. Given the above, I think the shrinker API certa...

...too. Does this parameter function really ? How can I perform my test in order to ascertain it ? P.S. : I used cpufreq in order to curb the cpu, and adjust the load with a kernel compilation (with j parameter). _________________________________________________________________ D?couvrez le Blog heroic Fantaisy d'Eragon! http://eragon-heroic-fantasy.spaces.live.com/

...> In particular the OOM notifier is worse than the shrinker because: > > > > The issue is that DEFLATE_ON_OOM is under-specified. > > > > > > > > 1. It is last-resort, which means the system has already gone > through > > > heroics to prevent OOM. Those heroic reclaim efforts are > expensive > > > and impact application performance. > > > > That's *exactly* what "deflate on OOM" suggests. > > > > > > It seems there are some use cases where "deflate on O...

...> In particular the OOM notifier is worse than the shrinker because: > > > > The issue is that DEFLATE_ON_OOM is under-specified. > > > > > > > > 1. It is last-resort, which means the system has already gone > through > > > heroics to prevent OOM. Those heroic reclaim efforts are > expensive > > > and impact application performance. > > > > That's *exactly* what "deflate on OOM" suggests. > > > > > > It seems there are some use cases where "deflate on O...

...for the loop, a significant power and performance win. I don't know how realistic it is to model the loop buffer in the register allocator, but this would a very interesting thing to try to optimize for in a later pass. If an inner loop "almost" fits, then it would probably be worth heroic effort to try to reduce the size of it to shave off a few bytes. -Chris

...ammer doesn't know whether a function pointer will be dereferenced from interrupt context or not. This suggests that for any function whose address is taken, there could be a required annotation such as ISR_ONLY or NONISR_ONLY. The compiler could use this to do the right thing without any heroic static analysis or dynamic binding. John

...gs that you need to do higher level loop transformations (e.g. affine abstractions or a layout independent memory buffer). Without those it is unclear whether we’ll get much benefit in practice from (e.g.) a multidimensional index. You can’t even really do SoA to AoS transformations without truly heroic work (e.g. like my phd thesis :). The places I’ve seen higher level transformations be successful in the LLVM context are in places like Poly (and MLIR) which have higher level abstractions, or in higher level IRs that lower to LLVM (e.g. XLA, SIL, and many many other domain specific examples). T...

...above typical desktop PC or commodity grade hardware. Not on par with super high end stuff, but well above average. > iX found and fixed a FreeBSD kernel NFS bug, but it was a > painful experience. I see that story in the exact opposite way: iXsystems found and fixed the problem, expending heroic levels of effort to do so. By contrast, I?ve had several $300-500 NASes become unmountable for one reason or another, and the vendor was no use *at all* in getting it remounted. I had to rebuild the NAS from backups each time. It?s rather annoying to buy a NAS, then later realize you need to b...

...https://lkml.org/lkml/2018/7/12/314 > https://lkml.org/lkml/2018/8/2/322 > > In particular the OOM notifier is worse than the shrinker because: The issue is that DEFLATE_ON_OOM is under-specified. > > 1. It is last-resort, which means the system has already gone through > heroics to prevent OOM. Those heroic reclaim efforts are expensive > and impact application performance. That's *exactly* what "deflate on OOM" suggests. Assume you are using virtio-balloon for some weird way of memory hotunplug (which is what some people do) and you want to minimiz...

.../2018/8/2/322 > > > > In particular the OOM notifier is worse than the shrinker because: > > The issue is that DEFLATE_ON_OOM is under-specified. > > > > >? 1. It is last-resort, which means the system has already gone through > >? ? ?heroics to prevent OOM. Those heroic reclaim efforts are expensive > >? ? ?and impact application performance. > > That's *exactly* what "deflate on OOM" suggests. > > > It seems there are some use cases where "deflate on OOM" is desired and > oth...

...le mail : "yes it's possible" or "no, we can't make it run with wine" would be very nice !! but please, give me a "yes" answer :D good luck for your future work ;) @+++++++ _________________________________________________________________ D?couvrez le Blog heroic Fantaisy d'Eragon! http://eragon-heroic-fantasy.spaces.live.com/

...perform that[1] ; has someone an idea about it ? [1] I altered my capi.conf file, and put the fax entension just after the Dial, and called a fax machine, but nothing happens. The capi log is in the attachment. _________________________________________________________________ D?couvrez le Blog heroic Fantaisy d'Eragon! http://eragon-heroic-fantasy.spaces.live.com/

Hi all, I have set up Asterisk and I am able to register with my SIP provider and receive calls. When I try to register with Asterisk from outside I can place calls but tthe other person can't hear me. Have opened port 5060 UDP as well as port 10000 to 20000 UDP. Any ideas? Thanks, Christian

Looks like the Wiki got spammed. Dan