cluster/ec: Add support for hardware acceleration

This patch implements functionalities for fast encoding/decoding
using hardware support. Currently optimized x86_64, SSE and AVX is
added.

Additionally this patch implements a caching mecanism for inverse
matrices to reduce computation time, as well as a new method for
computing the inverse that takes quadratic time instead of cubic.

Finally some unnecessary memory copies have been eliminated to
further increase performance.

Change-Id: I26c75f26fb4201bd22b51335448ea4357235065a
BUG: 1289922
Signed-off-by: Xavier Hernandez <xhernandez@datalab.es>
Reviewed-on: http://review.gluster.org/12837
Tested-by: Pranith Kumar Karampuri <pkarampu@redhat.com>
Smoke: Gluster Build System <jenkins@build.gluster.org>
NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org>
CentOS-regression: Gluster Build System <jenkins@build.gluster.org>
Reviewed-by: Pranith Kumar Karampuri <pkarampu@redhat.com>

1 files changed, 50 insertions, 1 deletions

diff --git a/xlators/cluster/ec/src/ec-helpers.c b/xlators/cluster/ec/src/ec-helpers.c
index 7cf8232353d..2391b2de3ae 100644
--- a/xlators/cluster/ec/src/ec-helpers.c
+++ b/xlators/cluster/ec/src/ec-helpers.c
@@ -12,10 +12,12 @@
 
 #include "byte-order.h"
 
+#include "ec.h"
 #include "ec-mem-types.h"
+#include "ec-messages.h"
 #include "ec-fops.h"
+#include "ec-method.h"
 #include "ec-helpers.h"
-#include "ec-messages.h"
 
 static const char * ec_fop_list[] =
 {
@@ -137,6 +139,53 @@ size_t ec_iov_copy_to(void * dst, struct iovec * vector, int32_t count,
     return total;
 }
 
+int32_t ec_buffer_alloc(xlator_t *xl, size_t size, struct iobref **piobref,
+                        void **ptr)
+{
+    struct iobref *iobref = NULL;
+    struct iobuf *iobuf = NULL;
+    int32_t ret = -ENOMEM;
+
+    iobuf = iobuf_get_page_aligned (xl->ctx->iobuf_pool, size,
+                                    EC_METHOD_WORD_SIZE);
+    if (iobuf == NULL) {
+        goto out;
+    }
+
+    iobref = *piobref;
+    if (iobref == NULL) {
+        iobref = iobref_new();
+        if (iobref == NULL) {
+            goto out;
+        }
+    }
+
+    ret = iobref_add(iobref, iobuf);
+    if (ret != 0) {
+        if (iobref != *piobref) {
+            iobref_unref(iobref);
+        }
+        iobref = NULL;
+
+        goto out;
+    }
+
+    GF_ASSERT(EC_ALIGN_CHECK(iobuf->ptr, EC_METHOD_WORD_SIZE));
+
+    *ptr = iobuf->ptr;
+
+out:
+    if (iobuf != NULL) {
+        iobuf_unref(iobuf);
+    }
+
+    if (iobref != NULL) {
+        *piobref = iobref;
+    }
+
+    return ret;
+}
+
 int32_t ec_dict_set_array(dict_t *dict, char *key, uint64_t value[],
                           int32_t size)
 {