[go] runtime: enable vgetrandom vDSO support for linux/riscv64

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Meng Zhuo (Gerrit)

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Aug 10, 2026, 7:51:58 PM (10 hours ago) Aug 10

to Meng Zhuo, goph...@pubsubhelper.golang.org, golang-...@googlegroups.com, Dmitri Shuralyov, Dmitri Shuralyov, Mark Freeman, golang...@luci-project-accounts.iam.gserviceaccount.com, Julian Zhu, Joel Sing, Mark Ryan, golang-co...@googlegroups.com

Meng Zhuo submitted the change with unreviewed changes

Unreviewed changes

7 is the latest approved patch-set.
The change was submitted with unreviewed changes in the following files:

```
The name of the file: src/runtime/sys_linux_riscv64.s
Insertions: 1, Deletions: 1.

The diff is too large to show. Please review the diff.
```

Change information

Commit message:

runtime: enable vgetrandom vDSO support for linux/riscv64

goos: linux
goarch: riscv64
pkg: crypto/rand
cpu: Spacemit(R) X100
        │        base.txt        │   vdso.txt       │
        │         sec/op         │    sec/op     vs base               │
Read/4             1015.0n ± ∞ ¹   134.3n ± ∞ ¹  -86.77% (p=0.008 n=5)
Read/32            1040.0n ± ∞ ¹   317.2n ± ∞ ¹  -69.50% (p=0.008 n=5)
Read/4K             30.95µ ± ∞ ¹   16.89µ ± ∞ ¹  -45.43% (p=0.008 n=5)
geomean             3.197µ         896.0n        -71.97%

        │        base.txt        │   vdso.txt       │
        │          B/s           │      B/s        vs base                │
Read/4             3.757Mi ± ∞ ¹   28.410Mi ± ∞ ¹  +656.09% (p=0.008 n=5)
Read/32            29.34Mi ± ∞ ¹    96.22Mi ± ∞ ¹  +227.88% (p=0.008 n=5)
Read/4K            126.2Mi ± ∞ ¹    231.3Mi ± ∞ ¹   +83.25% (p=0.008 n=5)
geomean            24.05Mi          85.83Mi        +256.82%

Change-Id: Ieafc243255547dfdaae5c872d971ff0f7b652fe7

Reviewed-on: https://go-review.googlesource.com/c/go/+/796060

Reviewed-by: Julian Zhu <jz53...@gmail.com>

LUCI-TryBot-Result: golang...@luci-project-accounts.iam.gserviceaccount.com <golang...@luci-project-accounts.iam.gserviceaccount.com>

Reviewed-by: Dmitri Shuralyov <dmit...@google.com>

Reviewed-by: Mark Freeman <markf...@google.com>

Files:

M src/runtime/sys_linux_riscv64.s
M src/runtime/vdso_linux_riscv64.go
M src/runtime/vgetrandom_linux.go
M src/runtime/vgetrandom_unsupported.go

Change size: M

Delta: 4 files changed, 54 insertions(+), 3 deletions(-)

Branch: refs/heads/master

Submit Requirements:

Code-Review: +1 by Dmitri Shuralyov, +2 by Julian Zhu, +1 by Mark Freeman
TryBots-Pass: LUCI-TryBot-Result+1 by golang...@luci-project-accounts.iam.gserviceaccount.com

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