* Question about ieee802_1d_to_ac
@ 2012-10-16 8:04 David Shwatrz
2012-10-16 13:00 ` Arend van Spriel
0 siblings, 1 reply; 2+ messages in thread
From: David Shwatrz @ 2012-10-16 8:04 UTC (permalink / raw)
To: linux-wireless
Hello,
I see in net/mac80211/wme.c:
...
const int ieee802_1d_to_ac[8] = {
IEEE80211_AC_BE,
IEEE80211_AC_BK,
IEEE80211_AC_BK,
IEEE80211_AC_BE,
IEEE80211_AC_VI,
IEEE80211_AC_VI,
IEEE80211_AC_VO,
IEEE80211_AC_VO
};
...
As I understand, this values stand for queues for different types of traffic:
IEEE80211_AC_BE is best-effort traffic ,
IEEE80211_AC_BK is background traffic ,
IEEE80211_AC_VI is video traffic,
IEEE80211_AC_VO is voice traffic.
We see that entries 6,7 are voice and entries 4,5 are video.
Is it not an error that entries 2,3 differ ? and also 0,1 ?
shouldn't it be:
const int ieee802_1d_to_ac[8] = {
IEEE80211_AC_BE,
IEEE80211_AC_BE,
IEEE80211_AC_BK,
IEEE80211_AC_BK,
Regards,
D Shwartz
^ permalink raw reply [flat|nested] 2+ messages in thread* Re: Question about ieee802_1d_to_ac
2012-10-16 8:04 Question about ieee802_1d_to_ac David Shwatrz
@ 2012-10-16 13:00 ` Arend van Spriel
0 siblings, 0 replies; 2+ messages in thread
From: Arend van Spriel @ 2012-10-16 13:00 UTC (permalink / raw)
To: David Shwatrz; +Cc: linux-wireless
On 10/16/2012 10:04 AM, David Shwatrz wrote:
> Hello,
>
> I see in net/mac80211/wme.c:
> ...
> const int ieee802_1d_to_ac[8] = {
> IEEE80211_AC_BE,
> IEEE80211_AC_BK,
> IEEE80211_AC_BK,
> IEEE80211_AC_BE,
> IEEE80211_AC_VI,
> IEEE80211_AC_VI,
> IEEE80211_AC_VO,
> IEEE80211_AC_VO
> };
> ...
This is the correct mapping if you want to trust the IEEE802.11e
standard (Table 20i).
Gr. AvS
> As I understand, this values stand for queues for different types of traffic:
> IEEE80211_AC_BE is best-effort traffic ,
> IEEE80211_AC_BK is background traffic ,
> IEEE80211_AC_VI is video traffic,
> IEEE80211_AC_VO is voice traffic.
>
> We see that entries 6,7 are voice and entries 4,5 are video.
> Is it not an error that entries 2,3 differ ? and also 0,1 ?
>
> shouldn't it be:
> const int ieee802_1d_to_ac[8] = {
> IEEE80211_AC_BE,
> IEEE80211_AC_BE,
> IEEE80211_AC_BK,
> IEEE80211_AC_BK,
>
>
> Regards,
> D Shwartz
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