lkml.org 
[lkml]   [2023]   [Oct]   [8]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH bpf-next v2 1/2] bpf: Add ability to pin bpf timer to calling CPU
From
Date


On 10/5/2023 12:23 AM, David Vernet wrote:
> BPF supports creating high resolution timers using bpf_timer_* helper
> functions. Currently, only the BPF_F_TIMER_ABS flag is supported, which
> specifies that the timeout should be interpreted as absolute time. It
> would also be useful to be able to pin that timer to a core. For
> example, if you wanted to make a subset of cores run without timer
> interrupts, and only have the timer be invoked on a single core.
>
> This patch adds support for this with a new BPF_F_TIMER_CPU_PIN flag.
> When specified, the HRTIMER_MODE_PINNED flag is passed to
> hrtimer_start(). A subsequent patch will update selftests to validate.
>
> Acked-by: Song Liu <song@kernel.org>
> Signed-off-by: David Vernet <void@manifault.com>

Acked-by: Hou Tao <houtao1@huawei.com>

\
 
 \ /
  Last update: 2023-10-08 06:10    [W:2.910 / U:0.112 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site