The following reply was made to PR os-linux/4268; it has been noted by GNATS.
From: Karthik Prabhakar <[EMAIL PROTECTED]> To: Dean Gaudet <[EMAIL PROTECTED]> Cc: [EMAIL PROTECTED], [EMAIL PROTECTED] Subject: Re: os-linux/4268: Performance drops off after high specweb loads on highperformance-conf-dist Date: Thu, 06 May 1999 08:03:53 +0000 Dean Gaudet wrote: > > On Thu, 22 Apr 1999, Karthik Prabhakar wrote: > > > >From the strace, it appears that the read() from the socket is > > taking a bit of time, as well as the flock(). > > the flock() is not abnormal -- it's used for interprocess synchronization. > The read() is also probably not a problem... it's usually client latency. > > I'm not sure what's up... I'm actually going to have a chance to test this > stuff out on a high end linux box under specweb this weekend I think. So > I may be able to repeat it. > > Dean The mystery continues. I got round to trying out 1.3.6 again this evening, this time on 2.2.7. I did _not_ see the performance drop off. Just to verify, I rechecked on the stock 2.2.5 kernel, and the drop off is there. So _something_ has been fixed between 2.2.5 and 2.2.7 that has made this problem go away. I'll keep plugging away as I get spare time to see if I can get the problem to occur. cheers, karthik
