Experimental Physics and
Industrial Control System

"J. Lewis Muir via Tech-talk" <[email protected]> · Fri, 15 Nov 2019 13:04:43 -0600

On 11/15, Mark Rivers wrote:
> Thanks for the suggestion.  Now things get REALLY weird.

Indeed. :-)

> I did what you said, and ran curl with --libcurl.  I timed the command:

[snip]

> The performance was the same, 0.33 seconds, much slower than running the curl command itself!

Strange.  Other things you could try:

1. Run curl and curl_gen under strace (e.g., "strace -CftT -s 256
   <command>") and see if you can tell where curl_gen is taking longer
   than curl.

2. Check the compiler optimization level curl_gen is compiled at just
   in case it's weak compared to what I presume the curl executable was
   compiled at.  (I doubt this is the cause.)

3. Check the ldd output for curl, libcurl.so, and curl_gen for anything
   that looks suspicious.  Make sure curl_gen is not linked against
   libgnutls.

4. You usually build EPICS and modules from an NFS file system,
   right?  Is that the case here?  If so, try copying curl_gen (and any
   dependencies) to a non-network file system and running it there.

Lewis

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System