RE: [PHP-DEV] Make PHP JIT to generate AVX2/AVX3 for performance improvement?
> > > Hi Guys, > > > > > > A quick question: is it possible to enable AVX2/AVX3 in PHP JIT > generated > > > code, and hence can get some performance improvement? > > > Just check the community first: if anyone has already tried that or > got > > > some experiences? before we dive into this investigation. > > > We are discussing if we could get some extra performance via new > AVX > > > instructions in PHP program execution. > > > > > > Thanks. > > > > > > > AVX3 might be too new to just flat out generate for it. But > > It can be quite simple for the JIT compiler to be aware of what > > features flags are enabled on a CPU and generate compatible > > instructions that will run on that CPU. > > > > it is not really new, however the gain for most cases are not necessarily > significant but for specific cases. > > For most usages in php, at a request level, the gain will be barely > measurable. > > Also for latest avx, most hosting servers won't have them anyway. > > I would think some specific APIs to prepare specific data to be > processed > using the best available runtime intrinsics would bring much more than > in > JIT. > > As a sidenote, most libraries used by php, where larger intrinsics > vectors > bring something, implement them already. > > > best, > Pierre > Thanks Pierre and tag? (apologize if I take your name wrongly) for the hint and information. We will carefully think about them... So far, we are still in early investigation stage and would like to hear opinions and ideas from our community. Best, Tony Su
Re: [PHP-DEV] Make PHP JIT to generate AVX2/AVX3 for performance improvement?
On Tue, Oct 31, 2023, 3:57 PM tag Knife wrote: > > Hi Guys, > > > > A quick question: is it possible to enable AVX2/AVX3 in PHP JIT generated > > code, and hence can get some performance improvement? > > Just check the community first: if anyone has already tried that or got > > some experiences? before we dive into this investigation. > > We are discussing if we could get some extra performance via new AVX > > instructions in PHP program execution. > > > > Thanks. > > > > AVX3 might be too new to just flat out generate for it. But > It can be quite simple for the JIT compiler to be aware of what > features flags are enabled on a CPU and generate compatible > instructions that will run on that CPU. > it is not really new, however the gain for most cases are not necessarily significant but for specific cases. For most usages in php, at a request level, the gain will be barely measurable. Also for latest avx, most hosting servers won't have them anyway. I would think some specific APIs to prepare specific data to be processed using the best available runtime intrinsics would bring much more than in JIT. As a sidenote, most libraries used by php, where larger intrinsics vectors bring something, implement them already. best, Pierre >
Re: [PHP-DEV] Make PHP JIT to generate AVX2/AVX3 for performance improvement?
> Hi Guys, > > A quick question: is it possible to enable AVX2/AVX3 in PHP JIT generated > code, and hence can get some performance improvement? > Just check the community first: if anyone has already tried that or got > some experiences? before we dive into this investigation. > We are discussing if we could get some extra performance via new AVX > instructions in PHP program execution. > > Thanks. > AVX3 might be too new to just flat out generate for it. But It can be quite simple for the JIT compiler to be aware of what features flags are enabled on a CPU and generate compatible instructions that will run on that CPU.
[PHP-DEV] Make PHP JIT to generate AVX2/AVX3 for performance improvement?
Hi Guys, A quick question: is it possible to enable AVX2/AVX3 in PHP JIT generated code, and hence can get some performance improvement? Just check the community first: if anyone has already tried that or got some experiences? before we dive into this investigation. We are discussing if we could get some extra performance via new AVX instructions in PHP program execution. Thanks.
