From: James Prestwood <prestwoj@gmail.com>
To: Johannes Berg <johannes@sipsolutions.net>,
"linux-wireless@vger.kernel.org" <linux-wireless@vger.kernel.org>
Subject: Re: poor beacon/scan reliability with mac80211_hwsim
Date: Wed, 23 Mar 2022 14:02:58 -0700 [thread overview]
Message-ID: <260e581ad38850276177bb4dde011de251cff1d5.camel@gmail.com> (raw)
In-Reply-To: <9e3f1db524321ac33a4aa79341e4e8165eb99189.camel@sipsolutions.net>
> Well I should have said time-travel=inf-cpu, which is really the mode
> I'd use for testing (and we have time-travel=ext of course for use
> with
> multiple VMs).
>
> In this case it simulates infinite CPU speed! Thus time only passes
> if
> it passes *explicitly*. So a timeout of 30ms will only fire after
> something else has slept 30ms, or nothing is actually doing anything
> at
> all of course. The amount of time it takes the CPU to do the jump out
> to
> userspace/wmediumd, come back, copy the frame, etc. is all completely
> irrelevant in this case. It's just "sleep 30ms" and all the necessary
> CPU expenditure is not accounted at all.
Sounds magical :) I'll have to look into this again.
>
> johannes
prev parent reply other threads:[~2022-03-23 21:03 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-23 17:22 poor beacon/scan reliability with mac80211_hwsim James Prestwood
2022-03-23 18:50 ` Johannes Berg
2022-03-23 19:45 ` James Prestwood
2022-03-23 20:13 ` Johannes Berg
2022-03-23 21:02 ` James Prestwood [this message]
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