Hi, In Dtrace, we can turn on probes using match pattern like this: a*:*b:*c*:entry It would be nice, if we can also exclude probes like this: !pid$target:xyz:abc*:entry In this case, all entry probes of functions in module xyz are turned on except those with leading abc. One of possible benifits of this feature is: if some short functions get hit billion times but we are not interested in those functions, then we can exclude them from being traced to minimize performance impact. THX. -- ************************************************ * C P Lin, Common Technology Project Lead. * * Sun Microsystems Inc. * * E-Mail: c.lin at sun.com * * Address: 4150 Network Circle, M/S UMPK12-330 * * Santa Clara, CA 95054 * * Phone: 650/352-4967 Fax: 650/786-7816 * ************************************************