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<p><tt>> I would really like to understand why ehca does worse with NAPI. In<br>
> my tests both mthca and ipath exhibit various degrees of improvement<br>
> depending on the test -- but I've never seen performance get worse.<br>
> This is the main thing holding back merging NAPI.<br>
> <br>
> Does the NAPI patch help mthca on pSeries? I wonder if it's not ehca,<br>
> but rather that there's some ppc64 quirk that makes NAPI a lot more<br>
> expensive.<br>
> <br>
> - R.<br>
</tt><br>
<tt>Got your point. Sorry I haven't made any big progress yet. What I have found so far in none scaling code, if I always set missed_event = 0 without peeking rotting packet, then NAPI will increase the performance and reduce the cpu utilization. That's the reason I suggest above change.</tt><br>
<tt>I have't found the reason for scaling code dropping 2/3 of the performance yet.</tt><br>
<tt>The NAPI touch test for methca on power performance is good.</tt><br>
<tt>So I don't think it's ppc4 issue.</tt><br>
<br>
<tt>Thanks</tt><br>
<tt>Shirley</tt></body></html>