From 6ea9939e0610a809f6f47d13ec68df00d1ca0afc Mon Sep 17 00:00:00 2001
From: Joshua Bakita <jbakita@cs.unc.edu>
Date: Fri, 16 Oct 2020 16:55:14 -0400
Subject: Move the DIS benchmarks up a directory and update hardcoded paths

Note that this repo does not attempt to keep a copy of the original
DIS benchmark distributions. UNC real-time has another repo for that.
---
 dis/gen_input.py | 113 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 113 insertions(+)
 create mode 100755 dis/gen_input.py

(limited to 'dis/gen_input.py')

diff --git a/dis/gen_input.py b/dis/gen_input.py
new file mode 100755
index 0000000..c7821b0
--- /dev/null
+++ b/dis/gen_input.py
@@ -0,0 +1,113 @@
+#!/usr/bin/python3
+#####
+# Copyright 2020 Joshua Bakita
+#
+# This program generates input data for the DIS benchmark suite on stdout
+# given a requested working set size.
+#####
+
+
+from ctypes import sizeof, c_double, c_int, c_short
+from math import sqrt, floor
+import sys # For argv and stderr
+
+USAGE = """Usage: {} <benchmark> <template> <WSS in bytes>"""
+
+# Check input
+if (len(sys.argv) < 4):
+    print(USAGE.format(sys.argv[0]), file=sys.stderr)
+    exit(1);
+
+# Don't try to understand the logic in these functions, see WSS_DOCS.md
+def setup_field(params, wss):
+    params[0] = wss
+    return params
+
+def setup_matrix(params, wss):
+    nnZR = 0.08 # 8% seems average
+    # This formula is out of a solver
+    si = sizeof(c_int)
+    sd = sizeof(c_double)
+    d = (sqrt((si**2) * (-(nnZR-1)) - si*sd*(nnZR-9) + si*wss*nnZR + sd*(25*sd+wss*nnZR+wss)) - si - 5*sd) / (si*nnZR + sd*nnZR + sd)
+    params[1] = floor(d);
+    params[2] = floor(d*d*nnZR);
+    if params[1] <= 0 or params[2] <= 0:
+        raise Exception("WSS too small for matrix benchmark!")
+    return params
+
+def setup_neighborhood(params, wss):
+    bitDepth = 8
+    bitDepthAlloc = sizeof(c_int) * (2**(bitDepth + 1) - 1)
+    dim = sqrt((wss - bitDepthAlloc) / sizeof(c_short))
+    params[1] = bitDepth
+    params[2] = floor(dim)
+    if params[1] <= 0 or params[2] <= 0:
+        raise Exception("WSS too small for neighborhood benchmark!")
+    # Cap maximum line thinkness to the image size
+    params[5] = min(params[2]-1, int(params[5]))
+    # Cap line lengths to the image size
+    params[6] = min(params[2]-1, int(params[6]))
+    params[7] = min(params[2]-1, int(params[7]))
+    return params
+
+def setup_pointer(params, wss):
+    n = 10;
+    f = (wss - sizeof(c_int) * 4 * n) / sizeof(c_int)
+    params[0] = floor(f)
+    params[4] = floor(n)
+    if params[0] <= 0 or params[4] <= 0:
+        raise Exception("WSS too small for pointer benchmark!")
+    return params
+
+def setup_transitive(params, wss):
+    n = sqrt(wss / (sizeof(c_int) * 2))
+    params[0] = floor(n)
+    # Fix edges at 50%
+    params[1] = floor(params[0] * 0.5)
+    if params[0] <= 0:
+        raise Exception("WSS too small for transitive benchmark!")
+    return params
+
+def setup_update(params, wss):
+    f = wss / sizeof(c_int)
+    params[0] = floor(f)
+    if params[0] <= 0:
+        raise Exception("WSS too small for update benchmark!")
+    # Don't do more than 100M hops (keeps time array feasible)
+    params[2] = min(100000000, int(params[2]))
+    # Enforce size requirements
+    params[4] = min(params[0]-1, int(params[4]))
+    params[5] = min(params[0]-1, int(params[5]))
+    params[6] = min(params[0]-1, int(params[6]))
+    return params
+
+def setup_random_walk(params, wss):
+    params[0] = wss
+    return params
+
+BENCH_TO_PARAMS = {"field":setup_field, "matrix":setup_matrix, "neighborhood":setup_neighborhood, "pointer":setup_pointer, "transitive":setup_transitive, "update":setup_update, "random_walk":setup_random_walk}
+
+# Main logic
+benchmark_name = sys.argv[1]
+if benchmark_name not in BENCH_TO_PARAMS.keys():
+    print("Invalid benchmark name.", file=sys.stderr)
+    exit(2)
+
+wss = int(sys.argv[3])
+if wss <= 0:
+    print("Invalid working set size", file=sys.stderr)
+    exit(3)
+
+with open(sys.argv[2], "r") as template:
+    # We expect the initialization params to all be on the first line
+    params = template.readline().split()
+    mutated_params = BENCH_TO_PARAMS[benchmark_name](params, wss);
+    print(" ".join(map(lambda x: str(x), mutated_params)))
+    print(" ".join(map(lambda x: str(x), mutated_params)), file=sys.stderr)
+    if benchmark_name == "pointer":
+        # Clone the data format used in the template
+        for i in range(0,10):
+            print("10 " + str(mutated_params[0]-10) + " " + str(mutated_params[0]-10))
+    else:
+        print(template.read())
+    
-- 
cgit v1.2.2