Integrated: 8264412: AArch64: CPU description should refer DMI
Yasumasa Suenaga
ysuenaga at openjdk.java.net
Wed Apr 14 15:14:38 UTC 2021
On Tue, 30 Mar 2021 07:53:59 GMT, Yasumasa Suenaga <ysuenaga at openjdk.org> wrote:
> `jdk.CPUInformation` event on AArch64 has valid CPU description in [JDK-8262491](https://bugs.openjdk.java.net/browse/JDK-8262491), however it does not work on UEFI booted machine.
>
> [JDK-8262491](https://bugs.openjdk.java.net/browse/JDK-8262491) refers device tree to get board name, however it does not exist on UEFI. We need to refer DMI.
> However we need to have root privilege, so we refer /sys/devices/virtual/dmi/id to avoid it.
>
> We can get board name from /sys/devices/virtual/dmi/id/board_name, but some machine set empty string to it. So we will refer /sys/devices/virtual/dmi/id/product_name as a fallback.
>
> For example, we can get following CPU description on AWS A1 instance after this change:
>
>
> jdk.CPUInformation {
> startTime = 05:28:24.506
> cpu = "AArch64"
> description = "AArch64 a1.2xlarge 0x41:0x0:0xd08:3, simd, crc, aes, sha1, sha256"
> sockets = 8
> cores = 8
> hwThreads = 8
> }
This pull request has now been integrated.
Changeset: 0afcbd4b
Author: Yasumasa Suenaga <ysuenaga at openjdk.org>
URL: https://git.openjdk.java.net/jdk/commit/0afcbd4b
Stats: 32 lines in 1 file changed: 22 ins; 2 del; 8 mod
8264412: AArch64: CPU description should refer DMI
Reviewed-by: aph, gziemski
-------------
PR: https://git.openjdk.java.net/jdk/pull/3259
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