search for: prefetches

Hi, Thanks, I am targetting x86 architecture. -Usha On Mon, Sep 22, 2014 at 10:39 PM, Hal Finkel <hfinkel at anl.gov> wrote: > ----- Original Message ----- > > From: "usha shau" <ushashau1 at gmail.com> > > To: llvmdev at cs.uiuc.edu > > Sent: Monday, September 22, 2014 7:01:20 AM > > Subject: [LLVMdev] Use of llvm.prefetch intrinsic for

Hi, I am new to LLVM and using it for my project where I want to perform software prefetching of code blocks. I am not able to use the llvm.prefetch instruction to fetch a block of code in instruction cache. The LangRef <http://llvm.org/docs/LangRef.html#llvm-prefetch-intrinsic>manual mentions that giving last argument as '0' performs prefetch on instruction cache. However, I get

On 2019-10-18 13:25, Tom Sommer via dovecot wrote: > I am seeing a lot of errors since the upgrade, on multiple client > accounts: > > Info: Connection closed: read(size=7902) failed: Connection reset by > peer (UID FETCH running for 0.242 + waiting input/output for 108.816 > secs, 60 B in + 24780576+8192 B out, state=wait-output) > > Using NFS storage (not running with

https://dovecot.org/releases/2.3/dovecot-2.3.8.tar.gz https://dovecot.org/releases/2.3/dovecot-2.3.8.tar.gz.sig Binary packages in https://repo.dovecot.org/ Changes + Added mail_delivery_started and mail_delivery_finished events, see https://doc.dovecot.org/admin_manual/list_of_events/ for details. + dsync-replication: Don't replicate users who have "noreplicate" extra field in

https://dovecot.org/releases/2.3/dovecot-2.3.8.tar.gz https://dovecot.org/releases/2.3/dovecot-2.3.8.tar.gz.sig Binary packages in https://repo.dovecot.org/ Changes + Added mail_delivery_started and mail_delivery_finished events, see https://doc.dovecot.org/admin_manual/list_of_events/ for details. + dsync-replication: Don't replicate users who have "noreplicate" extra field in

HI, Has anyone ever implemented instruction prefetching with llvm? If so, on which architectures? -- Thanks, Aasheesh -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20121212/0fa88f39/attachment.html>

...ltin_prefetch(foo, 0, 1); __builtin_prefetch(foo, 0, 2); __builtin_prefetch(foo, 0, 3); __builtin_prefetch(foo, 1, 0); __builtin_prefetch(foo, 1, 1); __builtin_prefetch(foo, 1, 2); __builtin_prefetch(foo, 1, 3); *foo = 1; return foo[0]; } The generated IR for the prefetches follow this pattern: tail call void @llvm.prefetch(i8* %0, i32 0, i32 0, i32 1) tail call void @llvm.prefetch(i8* %1, i32 0, i32 1, i32 1) tail call void @llvm.prefetch(i8* %2, i32 0, i32 2, i32 1) tail call void @llvm.prefetch(i8* %3, i32 0, i32 3, i32 1) tail call void @llvm.prefetch(i...

Hello, Can anyone please guide me how can I replace a load instruction with a prefetch. I was looking at the intrinsic creation methods of the IRBuilder, but I can only find functions corresponding to memset, memcpy and memmove intrinsics, not for prefetching. Also, I target x86-64 architectures. Is it sufficient to insert a call to the intrinsic in the LLVM IR to have the corresponding prefetch

...g > to use a fairly generic name to mean, "some compiler-controlled hardware > buffer." > > There's a similar concept on the load side though I don't know if any > existing processors actually implement things that way. I know of > (academic) architectures where prefetches fill independent prefetch > buffers and one wouldn't want to prefetch too many different things > because they would start filling each others' buffers. That kind of > behavior could be captured by this model. > > The key factor is contention. There's a limited hardware...

Hi all... The prefetch entry in the wiki says: "If you're using Dovecot's local delivery agent, you'll still need a valid userdb which it can use to locate the users. You can do this by adding a normal sql/ldap userdb after userdb prefetch." (http://wiki.dovecot.org/UserDatabase/Prefetch) My question is: Does it need to be a SQL/LDAP userdb? How about static or passwd?

On Wed, Dec 12, 2012 at 07:09:45PM -0500, aasheesh kolli wrote: > HI, > > Has anyone ever implemented instruction prefetching with llvm? If so, on which > architectures? Grep prefetch in lib/Target/* will show you ARM, X86, and PPC seems have implemented prefetch instruction. LLVM provides prefetch intrinsic [1] so that you can insert it in LLVM IR as a hint to code generator. I

Hello, I am setting up a new server and migrating my Dovecot 1.2.9 config to the new 2.2.9 version. There wasn't much to keep from the old version so I had to recreate the config from scratch. Now I think I'm done but I can't login to IMAP. The log says this: > dovecot: auth: Error: prefetch(box@****.de,2001:****:7765,<bzAOP5QJXwAgAQpgEAXJAZyOMB1qBXdl>): userdb lookup not

...ch instructions can be scheduled, but their constant offset needs to be held free for a while). In addition, estimating the number of cycles also requires relatively accurate load/store latiencies, and this, in turn, requires cache-miss latencies to be accounted for (which must then account for the prefetches). If anyone has thoughts on these ideas, I would like to hear them. Thanks again, Hal -- Hal Finkel Postdoctoral Appointee Leadership Computing Facility Argonne National Laboratory

Alexandra, I'm not sure what you mean by "replace", but I have code that does this to insert prefetches: Type *I8Ptr = Type::getInt8PtrTy((*I)->getContext(), PtrAddrSpace); Value *PrefPtrValue = ... IRBuilder<> Builder(MemI); Module *M = (*I)->getParent()->getParent(); Type *I32 = Type::getInt32Ty((*I)->getContext()); Value *PrefetchFunc = Intri...

...be scheduled, but > their constant offset needs to be held free for a while). In addition, > estimating the number of cycles also requires relatively accurate > load/store latiencies, and this, in turn, requires cache-miss latencies > to be accounted for (which must then account for the prefetches). > > If anyone has thoughts on these ideas, I would like to hear them. If you annotate loads with their expected latency, the upcoming MachineScheduler will be able to use the information. In the short term (next couple months), you're free to hack the SDScheduler as well. Although t...

Hi, I've got this strange problem where a striped endpoint will crash when I try to use cp to copy files off of it but not when I use rsync to copy files off: [user at gluster5 user]$ cp -r Python-2.6.4/ ~/tmp/ cp: reading `Python-2.6.4/Lib/lib2to3/tests/data/fixers/myfixes/__init__.py': Software caused connection abort cp: closing

Am 07.12.2014 um 00:56 schrieb Alexander Dalloz: > You did fulfill the requzirements for prefetch to work documented in the > wiki? > > http://wiki2.dovecot.org/UserDatabase/Prefetch Ehm, this is my SQL configuration 'dovecot-sql.conf.ext': > driver = mysql > connect = host=**** user=**** password=**** dbname=**** > default_pass_scheme = PLAIN > password_query = \

...LIS framework [3]. If I’m > not mistaken, it’s applied to try to make sure that micro-panel Br is > loaded after micro-panel Ar (as required in [1] p. 11). For example, > its using helps to reduce the execution time of the attached > implementation. Interesting. The BLIS implementation prefetches only the first cache line, before traversing a given interval of memory. This clearly confirms the implementation relies on hardware preteching to prefetch the subsequent lines. This makes a lot of sense. Yet surprisingly, the BLIS implementation does not attempt at anticipating the fetch. It...

Hello We are seeing the following lines in our /var/log/kern file. and I am wondering why IO window is disabled for those pci bridges and if it is necessary to enable them. Nov 1 15:19:18 Song kernel: IO window: disabled. Nov 1 15:19:18 Song kernel: MEM window: f4000000-f7ffffff Nov 1 15:19:18 Song kernel: PREFETCH window: disabled. Nov 1 15:19:18 Song kernel: PCI: Bridge: 0000:07:00.0 Nov

Hello After having installed my X100P, /proc/pci and /proc/interrupts dosent locate them. In my PCI list is it the Communication controller: Tiger Jet Network Inc ? then is dosent have a IRQ listed in /proc/pci.. All help appreciated Thanks and Regards Ajit ===========================/proc/pci================================== PCI devices found: Bus 0, device 0, function 0: Host