537d134373
This change introduces loadable fib lookup modules based on
DPDK rte_lpm lib targeted for high-speed lookups in large-scale tables.
It is based on the lookup framework described in D27401.
IPv4 module is called dpdk_lpm4. It wraps around rte_lpm [1] library.
This library implements variation of DIR24-8 [2] lookup algorithm.
Module provide lockless route lookups and in-place incremental updates,
allowing for good RIB performance.
IPv6 module is called dpdk_lpm6. It wraps around rte_lpm6 [3] library.
Implementation can be seen as multi-bit trie where the stride or number of bits
inspected on each level varies from level to level.
It can vary from 1 to 14 memory accesses, with 5 being the average value
for the lengths that are most commonly used in IPv6.
Module provide lockless route lookups for global unicast addresses
and in-place incremental updates, allowing for good RIB performance.
Implementation details:
* wrapper code lives in `sys/contrib/dpdk_rte_lpm/dpdk_lpm[6].c`.
* rte_lpm[6] implementation contains both RIB and FIB code.
. RIB ("rule_") code, backed by array of hash tables part has been commented out,
as base radix already provides all the necessary primitives.
* link-local lookups are currently implemented as base radix lookup.
This part should be converted to something like read-only radix trie.
Usage detail:
Compile kernel with option FIB_ALGO and load dpdk_lpm4/dpdk_lpm6
module at any time. They will be picked up automatically when
amount of routes raises to several thousand.
[1]: https://doc.dpdk.org/guides/prog_guide/lpm_lib.html
[2]: http://yuba.stanford.edu/~nickm/papers/Infocom98_lookup.pdf
[3]: https://doc.dpdk.org/guides/prog_guide/lpm6_lib.html
Differential Revision: https://reviews.freebsd.org/D27412
84 lines
2.0 KiB
C
84 lines
2.0 KiB
C
/* SPDX-License-Identifier: BSD-3-Clause
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* Copyright(c) 2010-2014 Intel Corporation
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*/
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#ifndef _RTE_DEBUG_H_
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#define _RTE_DEBUG_H_
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/**
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* @file
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*
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* Debug Functions in RTE
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*
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* This file defines a generic API for debug operations. Part of
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* the implementation is architecture-specific.
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*/
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//#include "rte_log.h"
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#include "rte_branch_prediction.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* Dump the stack of the calling core to the console.
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*/
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void rte_dump_stack(void);
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/**
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* Dump the registers of the calling core to the console.
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*
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* Note: Not implemented in a userapp environment; use gdb instead.
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*/
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void rte_dump_registers(void);
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/**
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* Provide notification of a critical non-recoverable error and terminate
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* execution abnormally.
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*
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* Display the format string and its expanded arguments (printf-like).
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*
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* In a linux environment, this function dumps the stack and calls
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* abort() resulting in a core dump if enabled.
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*
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* The function never returns.
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*
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* @param ...
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* The format string, followed by the variable list of arguments.
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*/
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#define rte_panic(...) rte_panic_(__func__, __VA_ARGS__, "dummy")
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#define rte_panic_(func, format, ...) __rte_panic(func, format "%.0s", __VA_ARGS__)
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#ifdef RTE_ENABLE_ASSERT
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#define RTE_ASSERT(exp) RTE_VERIFY(exp)
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#else
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#define RTE_ASSERT(exp) do {} while (0)
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#endif
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#define RTE_VERIFY(exp) do { \
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if (unlikely(!(exp))) \
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rte_panic("line %d\tassert \"%s\" failed\n", __LINE__, #exp); \
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} while (0)
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/*
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* Provide notification of a critical non-recoverable error and stop.
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*
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* This function should not be called directly. Refer to rte_panic() macro
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* documentation.
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*/
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void __rte_panic(const char *funcname , const char *format, ...)
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{
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#ifdef __GNUC__
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#if (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ > 2))
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__rte_cold
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#endif
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#endif
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//__rte_noreturn
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//__rte_format_printf(2, 3);
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#ifdef __cplusplus
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}
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#endif
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#endif /* _RTE_DEBUG_H_ */
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