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| author | Jeffrey Wilcke <jeffrey@ethereum.org> | 2017-02-02 22:25:42 +0800 |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2017-02-02 22:25:42 +0800 |
| commit | 8b57c494908637a5c0e74f8f7a13b3218e026757 (patch) | |
| tree | d5c7842eea6959c3b91dba00e8452a79d735a2a3 /eth/downloader/downloader.go | |
| parent | 296450451b090393b2dd11d057c5b72cb4d92356 (diff) | |
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params: core, core/vm, miner: 64bit gas instructions (#3514)
Reworked the EVM gas instructions to use 64bit integers rather than
arbitrary size big ints. All gas operations, be it additions,
multiplications or divisions, are checked and guarded against 64 bit
integer overflows.
In additon, most of the protocol paramaters in the params package have
been converted to uint64 and are now constants rather than variables.
* common/math: added overflow check ops
* core: vmenv, env renamed to evm
* eth, internal/ethapi, les: unmetered eth_call and cancel methods
* core/vm: implemented big.Int pool for evm instructions
* core/vm: unexported intPool methods & verification methods
* core/vm: added memoryGasCost overflow check and test
Diffstat (limited to 'eth/downloader/downloader.go')
| -rw-r--r-- | eth/downloader/downloader.go | 12 |
1 files changed, 6 insertions, 6 deletions
diff --git a/eth/downloader/downloader.go b/eth/downloader/downloader.go index 9be4bd87d..7e2952439 100644 --- a/eth/downloader/downloader.go +++ b/eth/downloader/downloader.go @@ -49,12 +49,12 @@ var ( MaxReceiptFetch = 256 // Amount of transaction receipts to allow fetching per request MaxStateFetch = 384 // Amount of node state values to allow fetching per request - MaxForkAncestry = 3 * params.EpochDuration.Uint64() // Maximum chain reorganisation - rttMinEstimate = 2 * time.Second // Minimum round-trip time to target for download requests - rttMaxEstimate = 20 * time.Second // Maximum rount-trip time to target for download requests - rttMinConfidence = 0.1 // Worse confidence factor in our estimated RTT value - ttlScaling = 3 // Constant scaling factor for RTT -> TTL conversion - ttlLimit = time.Minute // Maximum TTL allowance to prevent reaching crazy timeouts + MaxForkAncestry = 3 * params.EpochDuration // Maximum chain reorganisation + rttMinEstimate = 2 * time.Second // Minimum round-trip time to target for download requests + rttMaxEstimate = 20 * time.Second // Maximum rount-trip time to target for download requests + rttMinConfidence = 0.1 // Worse confidence factor in our estimated RTT value + ttlScaling = 3 // Constant scaling factor for RTT -> TTL conversion + ttlLimit = time.Minute // Maximum TTL allowance to prevent reaching crazy timeouts qosTuningPeers = 5 // Number of peers to tune based on (best peers) qosConfidenceCap = 10 // Number of peers above which not to modify RTT confidence |