Thank you Alan and David. In light of your responses, I'll take this to the Valhalla project.
Thanks, Ben From: David Holmes <david.hol...@oracle.com> To: Alan Bateman <alan.bate...@oracle.com>, Ben Walsh <ben_wa...@uk.ibm.com>, core-libs-dev@openjdk.java.net Date: 31/01/2018 01:33 Subject: Re: [PATCH] GPU Exploitation Infrastructure Project Sumatra was looking at GPU use: https://urldefense.proofpoint.com/v2/url?u=https-3A__wiki.openjdk.java.net_display_Sumatra_Main&d=DwIDaQ&c=jf_iaSHvJObTbx-siA1ZOg&r=0rTKw9slljsdE7-sx--lzTNyOod7e8UQH1LYkfqUvuI&m=vD7LxfdLPrTxzzKSXLaOfQRSdWYQbh-se0qfBfp4nNw&s=AHBCwadIN7Q_j6x0xUbIaPcF0uLyH4HgNqUg4j8YaV0&e= It's inactive though. David On 31/01/2018 7:46 AM, David Holmes wrote: > On 31/01/2018 1:35 AM, Alan Bateman wrote: >> On 30/01/2018 13:55, Ben Walsh wrote: >>> This patch provides the infrastructure to enable the exploitation of >>> a GPU >>> by the compiler to accelerate certain suitable Java constructs. >>> >>> When enabled, a suitable compiler can attempt to accelerate the >>> following >>> Java constructs by launching the corresponding lambda expression on the >>> GPU: >>> >>> IntStream.range(<range>).parallel().forEach(<lambda>) >>> IntStream.rangeClosed(<range>).parallel().forEach(<lambda>) >>> >>> where: >>> >>> <range> defines upper and lower bounds >>> <lambda> is a correctly defined lambda expression >>> >>> As it stands, with the HotSpot compiler, this patch performs a "no >>> op" in >>> the newly added in-built native library method. >>> This can be extended so that the HotSpot compiler attempts the >>> acceleration detailed above instead. >>> >>> I would like to pair with a sponsor to contribute this patch ... >> The function prototypes in jvm.h are JVM_* functions rather than JNI >> native method names. You may want to look at adding a JNI function to >> libjava with a wrapper or else use RegisterNatives to map the native >> method name to a JVM_* function. >> >> BTW: Is this something for one the project repos (Valhalla or Panama) >> rather the main line (jdk/jdk)? > > This should be looked at in the context of Panama I think, though IIRC > there was a distinct GPU related project as well? Either way GPU support > in mainline doesn't seem like something to just be dropped in like this > without much more higher-level discussion taking place. > > Plus hotspot changes - even stubs - must be reviewed on the appropriate > hotspot mailing list. > > David > >> -Alan Unless stated otherwise above: IBM United Kingdom Limited - Registered in England and Wales with number 741598. Registered office: PO Box 41, North Harbour, Portsmouth, Hampshire PO6 3AU
