| To: | Roland Dreier <roland@xxxxxxxxxxx> |
|---|---|
| Subject: | Re: LLTX and netif_stop_queue |
| From: | Eric Lemoine <eric.lemoine@xxxxxxxxx> |
| Date: | Mon, 3 Jan 2005 18:07:00 +0100 |
| Cc: | hadi@xxxxxxxxxx, Andi Kleen <ak@xxxxxxx>, Patrick McHardy <kaber@xxxxxxxxx>, "David S. Miller" <davem@xxxxxxxxxxxxx>, netdev@xxxxxxxxxxx, openib-general@xxxxxxxxxx |
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| In-reply-to: | <527jmu8nbw.fsf@topspin.com> |
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| Reply-to: | Eric Lemoine <eric.lemoine@xxxxxxxxx> |
| Sender: | netdev-bounce@xxxxxxxxxxx |
On Mon, 03 Jan 2005 08:54:59 -0800, Roland Dreier <roland@xxxxxxxxxxx> wrote: > Eric> What are your machines? In particular, how many CPUs do they have? > > Dual Xeons with HT on, so they look like 4 CPUs. If I understand correctly, LLTX aims at avoiding cache misses on lock variables (because of cacheline bouncing). So the effect of LLTX should increase as the number of CPUs not sharing the same cache increases. And two CPUs might not be enough... -- Eric |
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