diff --git a/test/access_pattern.csv b/test/access_pattern.csv
new file mode 100644
index 0000000..12ace39
--- /dev/null
+++ b/test/access_pattern.csv
@@ -0,0 +1,1024 @@
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+0x0000012f,0xc475fc25
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+0x000002af,0x4f8f60de
+0x00000200,0x6b3ed957
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+0x00000043,0xaebbd49c
+0x00000079,0x32e9f285
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+0x000002ee,0x69769d62
+0x000001d6,0x76155587
+0x0000016f,0xf474b542
+0x000003b2,0x0e03d080
+0x0000006d,0xcce03f59
+0x00000244,0xae332051
+0x00000366,0xa5d17a7b
+0x0000022b,0x0bb8f348
+0x00000150,0xd9d81433
+0x000000f9,0x06f2b1ca
+0x000000ed,0x10f3cbb5
+0x0000028a,0xb92f3a08
+0x0000038b,0x2e7839fc
+0x0000036d,0x8a55891d
+0x00000306,0x004434c7
+0x0000027a,0x2c2fe04e
+0x0000010a,0x23317858
+0x000003cd,0xb2e47f17
+0x000003a0,0xed86f8e0
+0x0000013a,0xf295d26e
+0x00000042,0xbd71be15
+0x0000016b,0xf52fcd29
+0x000003a3,0x80b123f1
+0x000003f4,0xc7b11df1
+0x000003ad,0x93a20006
+0x000003eb,0x52d781ac
+0x000002b1,0x6a5e69a3
+0x0000011a,0x0f63315c
+0x00000117,0x33659391
+0x00000051,0x1a05f763
+0x0000009b,0xde4ef3eb
+0x00000161,0xcd7d1638
+0x000001ec,0xee053da6
+0x000001ca,0x42044d3f
+0x000001de,0xcd1d0123
+0x0000028f,0x51f7b994
+0x000003bf,0x108f008e
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+0x00000124,0xab39af81
+0x00000189,0x1678f062
+0x000002cd,0x510dc040
+0x00000331,0x4d33628a
+0x00000229,0x944e008a
+0x00000341,0x5a7a5372
+0x00000166,0xa92e5b7d
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+0x0000023e,0x96675159
+0x000003da,0x64ab9558
+0x00000097,0x3f86cd0f
+0x000000fb,0x107b81b4
+0x000002eb,0x7fd9a144
+0x00000039,0x30a2b470
+0x00000145,0x5f730f7d
+0x0000011c,0x966cf066
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+0x00000202,0xa470e81e
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+0x00000392,0x7f080fa5
+0x00000304,0x24a98eb9
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+0x000003a6,0x6b304020
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+0x00000280,0xb6fdd0fe
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+0x000003e9,0x39daa1ed
+0x00000259,0xc3d82fe5
+0x000002e9,0x1781b102
+0x000002aa,0xfb0674fd
+0x00000396,0xa2f79ac4
+0x00000353,0x796131a3
+0x00000294,0x3a4f253c
+0x00000268,0x8819efeb
+0x00000364,0xbbac1595
+0x000003f5,0x6468a5f3
+0x00000103,0xd39a7cf1
+0x00000004,0x2d311b72
+0x000002cf,0xbeda8a15
+0x0000031f,0x92221439
+0x00000374,0xb790d8a9
+0x0000020c,0x45db5760
+0x000003e2,0x6332d00f
+0x0000028b,0xcfb7b189
+0x000001c9,0x6380385f
+0x0000037c,0x443714c5
+0x00000397,0x3a84c720
+0x00000377,0x6cd3807c
+0x000000a7,0xeed1718a
+0x00000168,0xb2d6b00f
+0x000000ba,0xd4143f6b
+0x000001e6,0x70a5cba8
+0x0000003a,0x6db46c23
+0x00000138,0x8b1cbc57
+0x00000327,0x1417447b
+0x0000023d,0xf824f9fe
+0x000000b0,0xa4afe544
+0x0000024e,0xcdeefb90
+0x00000156,0x9116659d
+0x00000095,0xbec1d9ff
+0x000003ea,0x418440ad
+0x000001e4,0x60b154d8
+0x00000381,0x05bee376
+0x0000023c,0x56313370
+0x000000df,0x2271ed24
+0x00000237,0x5e79fb1a
+0x0000034c,0x00a28d23
+0x00000307,0x9a60280a
+0x00000287,0x4aebb908
+0x0000036f,0x15b250b7
+0x000003e7,0xc03cd972
+0x0000022f,0x07b8b4f6
+0x00000295,0xba38ebb6
+0x00000210,0xba34a72a
+0x000001f9,0x3f3d8c6d
+0x000001fa,0xeec12a22
+0x00000151,0xcf258683
+0x0000012c,0x52c63dee
+0x00000181,0x7a1b33cb
+0x0000014a,0x87b6f8b2
+0x0000008e,0x18c0f3a6
diff --git a/test/benchmarks.yml b/test/benchmarks.yml
index 5d926a1..f58b240 100644
--- a/test/benchmarks.yml
+++ b/test/benchmarks.yml
@@ -1,76 +1,193 @@
 {
+    # sequential access
     "test_0": {
       "sdram_module":     'MT48LC16M16',
       "sdram_data_width": 32,
-      "bist_length":      4096,
-      "bist_random":      True,
+      "access_pattern":   {
+        "bist_length":      4096,
+        "bist_random":      False,
+      }
     },
     "test_1": {
       "sdram_module":     'MT48LC16M16',
       "sdram_data_width": 32,
-      "bist_length":      512,
-      "bist_random":      False,
+      "access_pattern":   {
+        "bist_length":      512,
+        "bist_random":      False,
+      }
     },
     "test_2": {
       "sdram_module":     'MT46V32M16',
       "sdram_data_width": 32,
-      "bist_length":      512,
-      "bist_random":      False,
+      "access_pattern":   {
+        "bist_length":      512,
+        "bist_random":      False,
+      }
     },
     "test_3": {
       "sdram_module":     'MT46V32M16',
       "sdram_data_width": 32,
-      "bist_length":      2048,
-      "bist_random":      False,
+      "access_pattern":   {
+        "bist_length":      2048,
+        "bist_random":      False,
+      }
     },
     "test_4": {
       "sdram_module":     'MT47H64M16',
       "sdram_data_width": 32,
-      "bist_length":      1024,
-      "bist_random":      False,
+      "access_pattern":   {
+        "bist_length":      1024,
+        "bist_random":      False,
+      }
     },
     "test_5": {
       "sdram_module":     'MT47H64M16',
       "sdram_data_width": 16,
-      "bist_length":      1024,
-      "bist_random":      False,
+      "access_pattern":   {
+        "bist_length":      1024,
+        "bist_random":      False,
+      }
     },
     "test_6": {
       "sdram_module":     'MT41K128M16',
       "sdram_data_width": 16,
-      "bist_length":      1024,
-      "bist_random":      False,
+      "access_pattern":   {
+        "bist_length":      1024,
+        "bist_random":      False,
+      }
     },
     "test_7": {
       "sdram_module":     'MT41K128M16',
       "sdram_data_width": 32,
-      "bist_length":      1024,
-      "bist_random":      False,
+      "access_pattern":   {
+        "bist_length":      1024,
+        "bist_random":      False,
+      }
     },
 
     # latency
     "test_8": {
       "sdram_module":     'MT48LC16M16',
       "sdram_data_width": 32,
-      "bist_length":      1,
-      "bist_random":      False,
+      "access_pattern":   {
+        "bist_length":      1,
+        "bist_random":      False,
+      }
     },
     "test_9": {
       "sdram_module":     'MT46V32M16',
       "sdram_data_width": 32,
-      "bist_length":      1,
-      "bist_random":      False,
+      "access_pattern":   {
+        "bist_length":      1,
+        "bist_random":      False,
+      }
     },
     "test_10": {
       "sdram_module":     'MT47H64M16',
       "sdram_data_width": 32,
-      "bist_length":      1,
-      "bist_random":      False,
+      "access_pattern":   {
+        "bist_length":      1,
+        "bist_random":      False,
+      }
     },
     "test_11": {
       "sdram_module":     'MT41K128M16',
       "sdram_data_width": 16,
-      "bist_length":      1,
-      "bist_random":      False,
+      "access_pattern":   {
+        "bist_length":      1,
+        "bist_random":      False,
+      }
+    },
+
+    # random access
+    "test_12": {
+      "sdram_module":     'MT48LC16M16',
+      "sdram_data_width": 32,
+      "access_pattern":   {
+        "bist_length":      1024,
+        "bist_random":      True,
+      }
+    },
+    "test_13": {
+      "sdram_module":     'MT46V32M16',
+      "sdram_data_width": 32,
+      "access_pattern":   {
+        "bist_length":      1024,
+        "bist_random":      True,
+      }
+    },
+    "test_14": {
+      "sdram_module":     'MT47H64M16',
+      "sdram_data_width": 32,
+      "access_pattern":   {
+        "bist_length":      1024,
+        "bist_random":      True,
+      }
+    },
+    "test_15": {
+      "sdram_module":     'MT41K128M16',
+      "sdram_data_width": 16,
+      "access_pattern":   {
+        "bist_length":      1024,
+        "bist_random":      True,
+      }
+    },
+
+    # custom access pattern
+    "test_16": {
+      "sdram_module":     'MT48LC16M16',
+      "sdram_data_width": 32,
+      "access_pattern":   {
+        "pattern_file":   "access_pattern.csv"
+      }
+    },
+    "test_17": {
+      "sdram_module":     'MT48LC16M16',
+      "sdram_data_width": 32,
+      "access_pattern":   {
+        "pattern_file":   "access_pattern.csv",
+      }
+    },
+    "test_18": {
+      "sdram_module":     'MT46V32M16',
+      "sdram_data_width": 32,
+      "access_pattern":   {
+        "pattern_file":   "access_pattern.csv",
+      }
+    },
+    "test_19": {
+      "sdram_module":     'MT46V32M16',
+      "sdram_data_width": 32,
+      "access_pattern":   {
+        "pattern_file":   "access_pattern.csv",
+      }
+    },
+    "test_20": {
+      "sdram_module":     'MT47H64M16',
+      "sdram_data_width": 32,
+      "access_pattern":   {
+        "pattern_file":   "access_pattern.csv",
+      }
+    },
+    "test_21": {
+      "sdram_module":     'MT47H64M16',
+      "sdram_data_width": 16,
+      "access_pattern":   {
+        "pattern_file":   "access_pattern.csv",
+      }
+    },
+    "test_22": {
+      "sdram_module":     'MT41K128M16',
+      "sdram_data_width": 16,
+      "access_pattern":   {
+        "pattern_file":   "access_pattern.csv",
+      }
+    },
+    "test_23": {
+      "sdram_module":     'MT41K128M16',
+      "sdram_data_width": 32,
+      "access_pattern":   {
+        "pattern_file":   "access_pattern.csv",
+      }
     },
 }