diff options
| author |   Damjan Marion <damarion@cisco.com> | 2021-07-14 18:18:08 +0200 |
|---|---|---|
| committer |   Florin Coras <florin.coras@gmail.com> | 2021-07-27 23:40:28 +0000 |
| commit | 24d65a1c5aa18c107ae17115dfb2ea1e5cc05527 (patch) | |
| tree | 215cbb2717554776aef83228b66874e1d15a8120 /src/vppinfra/cache.h | |
| parent | 37579c3bcd5f7c31bee4d16d97cfc71dea07fb76 (diff) | |
vppinfra: introduce CLIB_CACHE_PREFETCH_BYTES
Type: improvement
Change-Id: Ic07010f11ef303f5213a33b0faf24aaedb62f110
Signed-off-by: Damjan Marion <damarion@cisco.com>
Diffstat (limited to 'src/vppinfra/cache.h')
| -rw-r--r-- | src/vppinfra/cache.h | 60 |
1 files changed, 29 insertions, 31 deletions
diff --git a/src/vppinfra/cache.h b/src/vppinfra/cache.h index 04f91e00061..4229a068486 100644 --- a/src/vppinfra/cache.h +++ b/src/vppinfra/cache.h @@ -40,66 +40,64 @@ #include <vppinfra/error_bootstrap.h> -/* - * Allow CFLAGS to override the configured / deduced cache line size - */ -#ifndef CLIB_LOG2_CACHE_LINE_BYTES - /* Default cache line size of 64 bytes. */ #ifndef CLIB_LOG2_CACHE_LINE_BYTES #define CLIB_LOG2_CACHE_LINE_BYTES 6 #endif -#endif /* CLIB_LOG2_CACHE_LINE_BYTES defined */ - -#if (CLIB_LOG2_CACHE_LINE_BYTES >= 9) -#error Cache line size 512 bytes or greater +/* How much data prefetch instruction prefetches */ +#ifndef CLIB_LOG2_CACHE_PREFETCH_BYTES +#define CLIB_LOG2_CACHE_PREFETCH_BYTES CLIB_LOG2_CACHE_LINE_BYTES #endif -#define CLIB_CACHE_LINE_BYTES (1 << CLIB_LOG2_CACHE_LINE_BYTES) -#define CLIB_CACHE_LINE_ALIGN_MARK(mark) u8 mark[0] __attribute__((aligned(CLIB_CACHE_LINE_BYTES))) -#define CLIB_CACHE_LINE_ROUND(x) ((x + CLIB_CACHE_LINE_BYTES - 1) & ~(CLIB_CACHE_LINE_BYTES - 1)) - /* Default cache line fill buffers. */ #ifndef CLIB_N_PREFETCHES #define CLIB_N_PREFETCHES 16 #endif +#define CLIB_CACHE_LINE_BYTES (1 << CLIB_LOG2_CACHE_LINE_BYTES) +#define CLIB_CACHE_PREFETCH_BYTES (1 << CLIB_LOG2_CACHE_PREFETCH_BYTES) +#define CLIB_CACHE_LINE_ALIGN_MARK(mark) \ + u8 mark[0] __attribute__ ((aligned (CLIB_CACHE_LINE_BYTES))) +#define CLIB_CACHE_LINE_ROUND(x) \ + ((x + CLIB_CACHE_LINE_BYTES - 1) & ~(CLIB_CACHE_LINE_BYTES - 1)) + /* Read/write arguments to __builtin_prefetch. */ #define CLIB_PREFETCH_READ 0 #define CLIB_PREFETCH_LOAD 0 /* alias for read */ #define CLIB_PREFETCH_WRITE 1 #define CLIB_PREFETCH_STORE 1 /* alias for write */ -#define _CLIB_PREFETCH(n,size,type) \ - if ((size) > (n)*CLIB_CACHE_LINE_BYTES) \ - __builtin_prefetch (_addr + (n)*CLIB_CACHE_LINE_BYTES, \ - CLIB_PREFETCH_##type, \ - /* locality */ 3); - -#define CLIB_PREFETCH(addr,size,type) \ -do { \ - void * _addr = (addr); \ - \ - ASSERT ((size) <= 4*CLIB_CACHE_LINE_BYTES); \ - _CLIB_PREFETCH (0, size, type); \ - _CLIB_PREFETCH (1, size, type); \ - _CLIB_PREFETCH (2, size, type); \ - _CLIB_PREFETCH (3, size, type); \ -} while (0) +#define _CLIB_PREFETCH(n, size, type) \ + if ((size) > (n) *CLIB_CACHE_PREFETCH_BYTES) \ + __builtin_prefetch (_addr + (n) *CLIB_CACHE_PREFETCH_BYTES, \ + CLIB_PREFETCH_##type, /* locality */ 3); + +#define CLIB_PREFETCH(addr, size, type) \ + do \ + { \ + void *_addr = (addr); \ + \ + ASSERT ((size) <= 4 * CLIB_CACHE_PREFETCH_BYTES); \ + _CLIB_PREFETCH (0, size, type); \ + _CLIB_PREFETCH (1, size, type); \ + _CLIB_PREFETCH (2, size, type); \ + _CLIB_PREFETCH (3, size, type); \ + } \ + while (0) #undef _ static_always_inline void clib_prefetch_load (void *p) { - CLIB_PREFETCH (p, CLIB_CACHE_LINE_BYTES, LOAD); + __builtin_prefetch (p, /* rw */ 0, /* locality */ 3); } static_always_inline void clib_prefetch_store (void *p) { - CLIB_PREFETCH (p, CLIB_CACHE_LINE_BYTES, STORE); + __builtin_prefetch (p, /* rw */ 1, /* locality */ 3); } #endif /* included_clib_cache_h */ |