1 Commits (1bbbcf51205d6efd5bd02545833129c4eb7d754f)

Author	SHA1	Message	Date
Ken Steele	316190c6b9	Add TILE-Gx mPIPE packet processing support. ... The TILE-Gx processor includes a packet processing engine, called mPIPE, that can deliver packets directly into user space memory. It handles buffer allocation and load balancing (either static 5-tuple hashing, or dynamic flow affinity hashing are used here). The new packet source code is in source-mpipe.c and source-mpipe.h A new Tile runmode is added that configures the Suricata pipelines in worker mode, where each thread does the entire packet processing pipeline. It scales across all the Gx chips sizes of 9, 16, 36 or 72 cores. The new runmode is in runmode-tile.c and runmode-tile.h The configure script detects the TILE-Gx architecture and defines HAVE_MPIPE, which is then used to conditionally enable the code to support mPIPE packet processing. Suricata runs on TILE-Gx even without mPIPE support enabled. The Suricata Packet structures are allocated by the mPIPE hardware by allocating the Suricata Packet structure immediatley before the mPIPE packet buffer and then pushing the mPIPE packet buffer pointer onto the mPIPE buffer stack. This way, mPIPE writes the packet data into the buffer, returns the mPIPE packet buffer pointer, which is then converted into a Suricata Packet pointer for processing inside Suricata. When the Packet is freed, the buffer is returned to mPIPE's buffer stack, by setting ReleasePacket to an mPIPE release specific function. The code checks for the largest Huge page available in Linux when Suricata is started. TILE-Gx supports Huge pages sizes of 16MB, 64MB, 256MB, 1GB and 4GB. Suricata then divides one of those page into packet buffers for mPIPE. The code is not yet optimized for high performance. Performance improvements will follow shortly. The code was originally written by Tom Decanio and then further modified by Tilera. This code has been tested with Tilera's Multicore Developement Environment (MDE) version 4.1.5. The TILEncore-Gx36 (PCIe card) and TILEmpower-Gx (1U Rack mount).	12 years ago