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# vcl-ldpreload: a LD_PRELOAD library that uses the VPP Communications Library (VCL).  {#vcl_ldpreload_doc}

User can LD_PRELOAD any application that uses POSIX socket API.

NOTE: The sources have been moved to .../vpp/src/vcl and
      libvcl_ldpreload.so is built with VPP and can be found in
      .../vpp/build-root/install-vpp[_debug]-native/vpp/lib

## HowTo

# 1. Running the demo
## Run test script without parameters to see help menu:

export WS_ROOT=<top level vpp git repo dir>  (e.g. /scratch/my_name/vpp)
$WS_ROOT/test/scripts/socket_test.sh

# 2. Docker iPerf examples.
## These launch xterms. To quit, close xterms and run following docker kill cmd (WARNING: This will kill all docker containers!) 'docker kill $(docker ps -q)'


## Docker iPerf using default Linux Bridge

$WS_ROOT/test/scripts/socket_test.sh -bi docker-kernel

## Docker iPerf using VPP
$WS_ROOT/test/scripts/socket_test.sh -bi docker-preload
n class="cp">#define BIHASH_KVP_PER_PAGE 4 #ifndef __included_bihash_40_8_h__ #define __included_bihash_40_8_h__ #include <vppinfra/heap.h> #include <vppinfra/format.h> #include <vppinfra/pool.h> #include <vppinfra/xxhash.h> typedef struct { u64 key[5]; u64 value; } clib_bihash_kv_40_8_t; static inline int clib_bihash_is_free_40_8 (const clib_bihash_kv_40_8_t * v) { /* Free values are memset to 0xff, check a bit... */ if (v->key[0] == ~0ULL && v->value == ~0ULL) return 1; return 0; } static inline u64 clib_bihash_hash_40_8 (const clib_bihash_kv_40_8_t * v) { #if __SSE4_2__ u32 value = 0; value = _mm_crc32_u64 (value, v->key[0]); value = _mm_crc32_u64 (value, v->key[1]); value = _mm_crc32_u64 (value, v->key[2]); value = _mm_crc32_u64 (value, v->key[3]); value = _mm_crc32_u64 (value, v->key[4]); return value; #else u64 tmp = v->key[0] ^ v->key[1] ^ v->key[2] ^ v->key[3] ^ v->key[4]; return clib_xxhash (tmp); #endif } static inline u8 * format_bihash_kvp_40_8 (u8 * s, va_list * args) { clib_bihash_kv_40_8_t *v = va_arg (*args, clib_bihash_kv_40_8_t *); s = format (s, "key %llu %llu %llu %llu %llu value %llu", v->key[0], v->key[1], v->key[2], v->key[3], v->key[4], v->value); return s; } static inline int clib_bihash_key_compare_40_8 (const u64 * a, const u64 * b) { return ((a[0] ^ b[0]) | (a[1] ^ b[1]) | (a[2] ^ b[2]) | (a[3] ^ b[3]) | (a[4] ^ b[4])) == 0; } #undef __included_bihash_template_h__ #include <vppinfra/bihash_template.h> #endif /* __included_bihash_40_8_h__ */ /* * fd.io coding-style-patch-verification: ON * * Local Variables: * eval: (c-set-style "gnu") * End: */