From 9945be269638d7c9c3ce6f7bdaececb5424ec1e7 Mon Sep 17 00:00:00 2001
From: Florian Schmaus <flow@cs.fau.de>
Date: Tue, 31 Jul 2018 16:17:51 +0200
Subject: [PATCH] eval?Locality: experiment
---
eval/Locality.cpp | 32 ++++++++++++++++++++------------
1 file changed, 20 insertions(+), 12 deletions(-)
diff --git a/eval/Locality.cpp b/eval/Locality.cpp
index 084a4b3f..80a337af 100644
--- a/eval/Locality.cpp
+++ b/eval/Locality.cpp
@@ -127,19 +127,27 @@ static void performRound(State& state,
uint8_t* fiberData = fiberArgs->fiberData;
unsigned int bytesPerFiber = fiberArgs->state->bytesPerFiber;
- // 75% Chance that this fiber will do work.
- if (fiberData[0] < 192) {
- for (unsigned int i = 0; i < bytesPerFiber; i++) {
- fiberData[i] += fiberArgs->roundData;
+ for (unsigned int i = 0; i < bytesPerFiber; i++) {
+ unsigned int next = (i + L1_DCACHE_SIZE + fiberData[i]) % bytesPerFiber;
+ fiberData[i] -= fiberData[next];
+
+ fiberData[i] += fiberArgs->roundData;
+ /*
+ if (fiberData[i] < 128) {
+ fiberData[i] += fiberArgs->roundData / 2;
+ }
+ if (fiberData[i] > 192) {
+ fiberData[i] -= (fiberArgs->roundData * 4);
+ }
+ */
+ if (i == (bytesPerFiber * 0.75)) {
if (fiberData[i] < 128) {
- fiberData[i] += fiberArgs->roundData / 2;
- }
- if (fiberData[i] > 192) {
- fiberData[i] -= (fiberArgs->roundData * 4);
+ break;
}
}
}
+
#ifdef FIBER_METADATA
fiberMetadata->end = std::chrono::high_resolution_clock::now();
#endif
@@ -201,8 +209,8 @@ int main(UNUSED_ARG int argc, UNUSED_ARG char *argv[]) {
enableStacktraceOnAborts();
RuntimeVariant runtimeVariant = ws;
- unsigned int rounds = 10;
- unsigned int seed = 42;
+ unsigned int rounds = 20;
+ unsigned int seed = 4231;
int opt;
while ((opt = getopt(argc, argv, "m:")) != -1) {
@@ -225,8 +233,8 @@ int main(UNUSED_ARG int argc, UNUSED_ARG char *argv[]) {
}
unsigned int coreCount = 4;
- unsigned int bytesPerFiber = L1_DCACHE_SIZE / 4;
- unsigned int fiberCount = coreCount * 6;
+ unsigned int bytesPerFiber = L1_DCACHE_SIZE / 2;
+ unsigned int fiberCount = coreCount * 4;
std::chrono::time_point<std::chrono::high_resolution_clock> start, end;
--
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