From 5499cae91d763831ac9798c933c892ecd11f3699 Mon Sep 17 00:00:00 2001
From: jr <jonreiter@gmail.com>
Date: Mon, 3 May 2021 12:47:02 +0800
Subject: [PATCH] add --cuda-usleep flag to optionally usleep between search
 iterations

---
 ethminer/main.cpp            | 3 +++
 libethash-cuda/CUDAMiner.cpp | 5 +++++
 libethcore/Miner.h           | 1 +
 3 files changed, 9 insertions(+)

diff --git a/ethminer/main.cpp b/ethminer/main.cpp
index f1aec3d5b5..9d59810546 100644
--- a/ethminer/main.cpp
+++ b/ethminer/main.cpp
@@ -344,6 +344,9 @@ class MinerCLI
         app.add_option("--cuda-streams,--cu-streams", m_CUSettings.streams, "", true)
             ->check(CLI::Range(1, 99));
 
+        app.add_option("--cuda-usleep,--cu-usleep", m_CUSettings.usleep, "", true)
+                    ->check(CLI::Range(-1, 1000000));
+
 #endif
 
 #if ETH_ETHASHCPU
diff --git a/libethash-cuda/CUDAMiner.cpp b/libethash-cuda/CUDAMiner.cpp
index b47d689b4f..07fbe569b6 100644
--- a/libethash-cuda/CUDAMiner.cpp
+++ b/libethash-cuda/CUDAMiner.cpp
@@ -402,8 +402,13 @@ void CUDAMiner::search(
             // restart the stream on the next batch of nonces
             // unless we are done for this round.
             if (!done)
+            {
+                if (m_settings.usleep >= 0) {
+                    usleep(m_settings.usleep);
+                }
                 run_ethash_search(
                     m_settings.gridSize, m_settings.blockSize, stream, &buffer, start_nonce);
+            }
 
             if (found_count)
             {
diff --git a/libethcore/Miner.h b/libethcore/Miner.h
index 2f3b98f212..4f5820dc77 100644
--- a/libethcore/Miner.h
+++ b/libethcore/Miner.h
@@ -101,6 +101,7 @@ struct CUSettings : public MinerSettings
     unsigned schedule = 4;
     unsigned gridSize = 8192;
     unsigned blockSize = 128;
+    int usleep = -1;
 };
 
 // Holds settings for OpenCL Miner