Our software runs on multiple platforms: Solaris 9, Solaris 10, RH 4, RH5, Monta Vista, SLES, etc. We have a PCI board that we make that our software uses. ( Therefore, we have a driver in the kernel. ) We have observed that the RH5 platform is slower than the RH4 platform when we run our performance test. Our test answers the question: How many messages per second can be transferred between the host and the board using DMA? ( for reference, on RH4 we can achieve 31720, but on RH5 we can only achieve 31052. ) Has anyone else observed a degradation in RH5 ( 64 bit ) when compared to RH4 ? Does anyone know if there are any bugzilla reports related to this topic of lesser performance ? wr -- redhat-list mailing list unsubscribe mailto:redhat-list-request@xxxxxxxxxx?subject=unsubscribe https://www.redhat.com/mailman/listinfo/redhat-list