diff options
| author | Jeff Garzik <jeff@garzik.org> | 2011-03-17 23:22:10 -0400 |
|---|---|---|
| committer | Jeff Garzik <jgarzik@pobox.com> | 2011-03-17 23:22:10 -0400 |
| commit | 6818c6928a95af2cda225176ccc54bc6424e8103 (patch) | |
| tree | 5e35cd6505c46b436de6e47964e6744bd8454e7b | |
| parent | 33e5b54928ee1e4b1bcc35a46ff44d42cb4fbe8a (diff) | |
Improve max nonce auto-adjustment with some basic algebra.
| -rw-r--r-- | cpu-miner.c | 13 |
1 files changed, 5 insertions, 8 deletions
diff --git a/cpu-miner.c b/cpu-miner.c index 7cd6e74..c7a6672 100644 --- a/cpu-miner.c +++ b/cpu-miner.c @@ -500,6 +500,7 @@ static void *miner_thread(void *userdata) struct work work __attribute__((aligned(128))); unsigned long hashes_done; struct timeval tv_start, tv_end, diff; + uint64_t max64; bool rc; /* obtain new work from internal workio thread */ @@ -576,14 +577,10 @@ static void *miner_thread(void *userdata) hashmeter(thr_id, &diff, hashes_done); /* adjust max_nonce to meet target scan time */ - if (diff.tv_sec > (opt_scantime * 2)) - max_nonce /= 2; /* large decrease */ - else if ((diff.tv_sec > opt_scantime) && - (max_nonce > 1500000)) - max_nonce -= 1000000; /* small decrease */ - else if ((diff.tv_sec < opt_scantime) && - (max_nonce < 0xffffec76)) - max_nonce += 100000; /* small increase */ + max64 = ((uint64_t)hashes_done * opt_scantime) / diff.tv_sec; + if (max64 > 0xfffffffaULL) + max64 = 0xfffffffaULL; + max_nonce = max64; /* if nonce found, submit work */ if (rc && !submit_work(mythr, &work)) |