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authorFlorin Coras <fcoras@cisco.com>2018-06-29 08:44:31 -0700
committerDave Barach <openvpp@barachs.net>2018-09-18 13:26:14 +0000
commit3aa7af3bd703325619634ef9938cf990be3e6f24 (patch)
tree717697487ded91d2bd88c5f22b7982cb9de60bf4 /src
parentb4603a70cbc00daa8cbce159f513af205b634aa9 (diff)
svm: better march support for svm fifo
Change-Id: I6a4335654882a2ca66d3d465e35e350868242b8d Signed-off-by: Florin Coras <fcoras@cisco.com>
Diffstat (limited to 'src')
-rw-r--r--src/svm/CMakeLists.txt3
-rw-r--r--src/svm/svm_fifo.c180
2 files changed, 87 insertions, 96 deletions
diff --git a/src/svm/CMakeLists.txt b/src/svm/CMakeLists.txt
index 203a9bb53f8..9655b0acc6a 100644
--- a/src/svm/CMakeLists.txt
+++ b/src/svm/CMakeLists.txt
@@ -23,6 +23,9 @@ add_vpp_library(svm
queue.c
message_queue.c
+ MULTIARCH_SOURCES
+ svm_fifo.c
+
INSTALL_HEADERS
ssvm.h
svm_common.h
diff --git a/src/svm/svm_fifo.c b/src/svm/svm_fifo.c
index 0c258b4259c..6a9c0df676f 100644
--- a/src/svm/svm_fifo.c
+++ b/src/svm/svm_fifo.c
@@ -16,6 +16,41 @@
#include <svm/svm_fifo.h>
#include <vppinfra/cpu.h>
+#if __x86_64__ && CLIB_DEBUG == 0
+#define foreach_march_variant_runtime(macro, _args...) \
+ macro(avx512, avx512f, _args) \
+ macro(avx2, avx2, _args)
+#else
+#define foreach_march_variant_runtime(macro, _args...)
+#endif
+
+#define CLIB_MARCH_ARCH_CHECK(arch, archname, fn) \
+ if (clib_cpu_supports_ ## archname ()) \
+ return & fn ## _ ##arch;
+
+#define CLIB_MARCH_SELECT_FN(fn,...) \
+ __VA_ARGS__ void * fn ## _multiarch_select(void) \
+{ \
+ foreach_march_variant_runtime(CLIB_MARCH_ARCH_CHECK, fn) \
+ return & fn; \
+}
+
+#define DEFINE_WEAK_FN(_arch, _fn, _args...) \
+ int __attribute__((weak)) _fn##_ma_##_arch(_args);
+#define DEFINE_FN_HELPER(arch, archname, macro, _args...) \
+ macro(arch, _args)
+
+#ifndef CLIB_MARCH_VARIANT
+#define MARCH_FN(fn, _args...) \
+ static void * (*fn ## _selected) (void); \
+ foreach_march_variant_runtime (DEFINE_FN_HELPER, DEFINE_WEAK_FN, fn, \
+ _args); \
+ static inline int CLIB_CPU_OPTIMIZED CLIB_MARCH_SFX (fn ## _ma)(_args)
+#else
+#define MARCH_FN(fn, _args...) \
+ int CLIB_CPU_OPTIMIZED CLIB_MARCH_SFX (fn ## _ma)(_args)
+#endif
+
static inline u8
position_lt (svm_fifo_t * f, u32 a, u32 b)
{
@@ -50,6 +85,8 @@ ooo_segment_end_pos (svm_fifo_t * f, ooo_segment_t * s)
return (s->start + s->length) % f->nitems;
}
+#ifndef CLIB_MARCH_VARIANT
+
u8 *
format_ooo_segment (u8 * s, va_list * args)
{
@@ -225,6 +262,7 @@ svm_fifo_free (svm_fifo_t * f)
clib_mem_free (f);
}
}
+#endif
always_inline ooo_segment_t *
ooo_segment_new (svm_fifo_t * f, u32 start, u32 length)
@@ -451,9 +489,8 @@ ooo_segment_try_collect (svm_fifo_t * f, u32 n_bytes_enqueued)
return bytes;
}
-static int
-svm_fifo_enqueue_internal (svm_fifo_t * f, u32 max_bytes,
- const u8 * copy_from_here)
+MARCH_FN (svm_fifo_enqueue_nowait, svm_fifo_t * f, u32 max_bytes,
+ const u8 * copy_from_here)
{
u32 total_copy_bytes, first_copy_bytes, second_copy_bytes;
u32 cursize, nitems;
@@ -515,40 +552,15 @@ svm_fifo_enqueue_internal (svm_fifo_t * f, u32 max_bytes,
return (total_copy_bytes);
}
-#define SVM_ENQUEUE_CLONE_TEMPLATE(arch, fn, tgt) \
- uword \
- __attribute__ ((flatten)) \
- __attribute__ ((target (tgt))) \
- CLIB_CPU_OPTIMIZED \
- fn ## _ ## arch ( svm_fifo_t * f, u32 max_bytes, u8 * copy_from_here) \
- { return fn (f, max_bytes, copy_from_here);}
-
-static int
-svm_fifo_enqueue_nowait_ma (svm_fifo_t * f, u32 max_bytes,
- const u8 * copy_from_here)
-{
- return svm_fifo_enqueue_internal (f, max_bytes, copy_from_here);
-}
-
-foreach_march_variant (SVM_ENQUEUE_CLONE_TEMPLATE,
- svm_fifo_enqueue_nowait_ma);
-CLIB_MULTIARCH_SELECT_FN (svm_fifo_enqueue_nowait_ma);
-
+#ifndef CLIB_MARCH_VARIANT
int
svm_fifo_enqueue_nowait (svm_fifo_t * f, u32 max_bytes,
const u8 * copy_from_here)
{
-#if CLIB_DEBUG > 0
- return svm_fifo_enqueue_nowait_ma (f, max_bytes, copy_from_here);
-#else
- static int (*fp) (svm_fifo_t *, u32, const u8 *);
-
- if (PREDICT_FALSE (fp == 0))
- fp = (void *) svm_fifo_enqueue_nowait_ma_multiarch_select ();
-
- return (*fp) (f, max_bytes, copy_from_here);
-#endif
+ return ((int (*)(svm_fifo_t * f, u32, const u8 *))
+ (*svm_fifo_enqueue_nowait_selected)) (f, max_bytes, copy_from_here);
}
+#endif
/**
* Enqueue a future segment.
@@ -557,11 +569,8 @@ svm_fifo_enqueue_nowait (svm_fifo_t * f, u32 max_bytes,
* Returns 0 of the entire segment was copied
* Returns -1 if none of the segment was copied due to lack of space
*/
-static int
-svm_fifo_enqueue_with_offset_internal (svm_fifo_t * f,
- u32 offset,
- u32 required_bytes,
- u8 * copy_from_here)
+MARCH_FN (svm_fifo_enqueue_with_offset, svm_fifo_t * f,
+ u32 offset, u32 required_bytes, u8 * copy_from_here)
{
u32 total_copy_bytes, first_copy_bytes, second_copy_bytes;
u32 cursize, nitems, normalized_offset;
@@ -609,14 +618,16 @@ svm_fifo_enqueue_with_offset_internal (svm_fifo_t * f,
return (0);
}
+#ifndef CLIB_MARCH_VARIANT
int
-svm_fifo_enqueue_with_offset (svm_fifo_t * f,
- u32 offset,
- u32 required_bytes, u8 * copy_from_here)
+svm_fifo_enqueue_with_offset (svm_fifo_t * f, u32 offset, u32 required_bytes,
+ u8 * copy_from_here)
{
- return svm_fifo_enqueue_with_offset_internal (f, offset, required_bytes,
- copy_from_here);
+ return ((int (*)(svm_fifo_t * f, u32, u32, u8 *))
+ (*svm_fifo_enqueue_with_offset_selected)) (f, offset,
+ required_bytes,
+ copy_from_here);
}
void
@@ -633,9 +644,10 @@ svm_fifo_overwrite_head (svm_fifo_t * f, u8 * data, u32 len)
clib_memcpy (&f->data[0], data + first_chunk, len - first_chunk);
}
}
+#endif
-static int
-svm_fifo_dequeue_internal (svm_fifo_t * f, u32 max_bytes, u8 * copy_here)
+MARCH_FN (svm_fifo_dequeue_nowait, svm_fifo_t * f, u32 max_bytes,
+ u8 * copy_here)
{
u32 total_copy_bytes, first_copy_bytes, second_copy_bytes;
u32 cursize, nitems;
@@ -687,43 +699,18 @@ svm_fifo_dequeue_internal (svm_fifo_t * f, u32 max_bytes, u8 * copy_here)
return (total_copy_bytes);
}
-static int
-svm_fifo_dequeue_nowait_ma (svm_fifo_t * f, u32 max_bytes, u8 * copy_here)
-{
- return svm_fifo_dequeue_internal (f, max_bytes, copy_here);
-}
-
-#define SVM_FIFO_DEQUEUE_CLONE_TEMPLATE(arch, fn, tgt) \
- uword \
- __attribute__ ((flatten)) \
- __attribute__ ((target (tgt))) \
- CLIB_CPU_OPTIMIZED \
- fn ## _ ## arch ( svm_fifo_t * f, u32 max_bytes, \
- u8 * copy_here) \
- { return fn (f, max_bytes, copy_here);}
-
-foreach_march_variant (SVM_FIFO_DEQUEUE_CLONE_TEMPLATE,
- svm_fifo_dequeue_nowait_ma);
-CLIB_MULTIARCH_SELECT_FN (svm_fifo_dequeue_nowait_ma);
+#ifndef CLIB_MARCH_VARIANT
int
svm_fifo_dequeue_nowait (svm_fifo_t * f, u32 max_bytes, u8 * copy_here)
{
-#if CLIB_DEBUG > 0
- return svm_fifo_dequeue_nowait_ma (f, max_bytes, copy_here);
-#else
- static int (*fp) (svm_fifo_t *, u32, u8 *);
-
- if (PREDICT_FALSE (fp == 0))
- fp = (void *) svm_fifo_dequeue_nowait_ma_multiarch_select ();
-
- return (*fp) (f, max_bytes, copy_here);
-#endif
+ return ((int (*)(svm_fifo_t * f, u32, u8 *))
+ (*svm_fifo_dequeue_nowait_selected)) (f, max_bytes, copy_here);
}
+#endif
-static int
-svm_fifo_peek_ma (svm_fifo_t * f, u32 relative_offset, u32 max_bytes,
- u8 * copy_here)
+MARCH_FN (svm_fifo_peek, svm_fifo_t * f, u32 relative_offset, u32 max_bytes,
+ u8 * copy_here)
{
u32 total_copy_bytes, first_copy_bytes, second_copy_bytes;
u32 cursize, nitems, real_head;
@@ -760,32 +747,15 @@ svm_fifo_peek_ma (svm_fifo_t * f, u32 relative_offset, u32 max_bytes,
return total_copy_bytes;
}
-#define SVM_FIFO_PEEK_CLONE_TEMPLATE(arch, fn, tgt) \
- uword \
- __attribute__ ((flatten)) \
- __attribute__ ((target (tgt))) \
- CLIB_CPU_OPTIMIZED \
- fn ## _ ## arch ( svm_fifo_t * f, u32 relative_offset, u32 max_bytes, \
- u8 * copy_here) \
- { return fn (f, relative_offset, max_bytes, copy_here);}
-
-foreach_march_variant (SVM_FIFO_PEEK_CLONE_TEMPLATE, svm_fifo_peek_ma);
-CLIB_MULTIARCH_SELECT_FN (svm_fifo_peek_ma);
+#ifndef CLIB_MARCH_VARIANT
int
svm_fifo_peek (svm_fifo_t * f, u32 relative_offset, u32 max_bytes,
u8 * copy_here)
{
-#if CLIB_DEBUG > 0
- return svm_fifo_peek_ma (f, relative_offset, max_bytes, copy_here);
-#else
- static int (*fp) (svm_fifo_t *, u32, u32, u8 *);
-
- if (PREDICT_FALSE (fp == 0))
- fp = (void *) svm_fifo_peek_ma_multiarch_select ();
-
- return (*fp) (f, relative_offset, max_bytes, copy_here);
-#endif
+ return ((int (*)(svm_fifo_t * f, u32, u32, u8 *))
+ (*svm_fifo_peek_selected)) (f, relative_offset, max_bytes,
+ copy_here);
}
int
@@ -903,6 +873,24 @@ svm_fifo_init_pointers (svm_fifo_t * f, u32 pointer)
f->head = f->tail = pointer % f->nitems;
}
+#define foreach_svm_fifo_march_fn \
+ _(svm_fifo_enqueue_nowait) \
+ _(svm_fifo_enqueue_with_offset) \
+ _(svm_fifo_dequeue_nowait) \
+ _(svm_fifo_peek) \
+
+#define _(_fn, _args...) CLIB_MARCH_SELECT_FN(_fn ## _ma);
+foreach_svm_fifo_march_fn
+#undef _
+void __clib_constructor
+svm_fifo_select_march_fns (void)
+{
+#define _(_fn, _args...) _fn ## _selected = _fn ## _ma_multiarch_select ();
+ foreach_svm_fifo_march_fn
+#undef _
+}
+
+#endif
/*
* fd.io coding-style-patch-verification: ON
*