506336f2cd
sender_body() uses OPT_COPY to copy the frame into the destination slot for the first 100,000 packets. Then it removes OPT_COPY to improve performance. The function always starts with the first tx ring. If multiple tx rings are in use, it is possible that the initial 100k packets will only use the first ring. After OPT_COPY is removed, there may come a time when the first ring is full and sender_body() will move to the next ring which was never initialized. As a result it will send all zero packets. (This was discovered when the receiving NIC reported rx errors.) Before any transmissions, step through every tx ring and set NS_BUF_CHANGED on every slot. That will force send_packets() to initialize the slot when first used. Since it only copies when necessary, it performs better than always setting OPT_COPY. With this change, there is no reason for the "drop copy" code. Submitted by: Brian Poole <brian90013@gmail.com> MFC after: 7 days |
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| boot | ||
| bsdbox | ||
| build | ||
| bus_space | ||
| coccinelle | ||
| debugscripts | ||
| diag | ||
| ifnet | ||
| kerneldoc | ||
| LibraryReport | ||
| lua | ||
| pkgbase | ||
| regression | ||
| sched | ||
| test | ||
| tools | ||
| uma/smrstress | ||
| install.sh | ||
| make_libdeps.sh | ||
| README | ||
| tinder.sh | ||
$FreeBSD$ This directory tree contains tools used for the maintenance and testing of FreeBSD. There is no toplevel Makefile structure since these tools are not meant to be built as part of the standard system, though there may be individual Makefiles in some of the subdirs. Please read the README files in the subdirs for further information.