This is the mail archive of the
systemtap@sourceware.org
mailing list for the systemtap project.
Re: control channel usermode polling vs runtime "IO check" kernel thread
- From: fche at redhat dot com (Frank Ch. Eigler)
- To: "Turgis, Frederic" <f-turgis at ti dot com>
- Cc: "systemtap at sourceware dot org" <systemtap at sourceware dot org>
- Date: Tue, 18 Jan 2011 10:21:31 -0500
- Subject: Re: control channel usermode polling vs runtime "IO check" kernel thread
- References: <13872098A06B02418CF379A158C0F146015C003539@dnce02.ent.ti.com>
f-turgis wrote:
> [...] While using systemtap on a SoC with power management enabled
> and "tickless" kernel, I have observed regular wake-ups of
> systemtap/0 kernel thread ever> y scheduler tick. I have related
> that to below observations/conclusions:
I believe all of your observations are correct. We haven't
sufficiently tuned this aspect of the system, and would appreciate
further advice or help.
- FChE