filter: replace region.Clone in filter #2794
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Signed-off-by: Song Gao <disxiaofei@163.com>
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Signed-off-by: Song Gao <disxiaofei@163.com>
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nolouch
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Aug 18, 2020
server/schedule/filter/filters.go
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| // cloneRegion is used to replace region.Clone in filter which call the FitRegion, | ||
| // as FitRegion only needs partial information(startKey, endKey, peers, leader peer) | ||
| func cloneRegion(region *core.RegionInfo, opts ...core.RegionCreateOption) *core.RegionInfo { |
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Do not clone the downPeers, pendingPeers? maybe rename to a suitable name?
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How about createRegionForRuleFit(peers []*metapb.Peer, leader *metapb.Peer) *core.RegionInfo?
Signed-off-by: Song Gao <disxiaofei@163.com>
disksing
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Aug 19, 2020
| StoreId: leader.StoreId, | ||
| Role: leader.Role, | ||
| } | ||
| copyPeers := make([]*metapb.Peer, 0, len(peers)) |
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Seems we don't have to copy leader. And if the peer list is untouched, we don't need to copy it either.
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I think for both ruleFitFilter and ruleLeaderFitFilter, they will both touch peers and leaders. I think it is necessary to copy peers and leaders either.
disksing
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Aug 19, 2020
I updated the benchmark result in the description. |
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cherry pick to release-4.0 in PR #2801 |
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Signed-off-by: Song Gao <disxiaofei@163.com> Signed-off-by: ZenoTan <zenotan1998@gmail.com>
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Signed-off-by: Song Gao disxiaofei@163.com
What problem does this PR solve?
ref #2783
region.Clone consumes too much cpu resources.
What is changed and how it works?
replace region.Clone with a self-maintained clone function as FitRegion only need partial information of a region.
BenchmarkCloneRegionTest is using new clone method and BenchmarkCloneRegionTest2 is using region.Clone
$ go test -bench=. -run=none goos: darwin goarch: amd64 pkg: github.com/tikv/pd/server/schedule/filter BenchmarkCloneRegionTest-4 4356267 267 ns/op BenchmarkCloneRegionTest2-4 316604 3292 ns/op PASS ok github.com/tikv/pd/server/schedule/filter 2.555sCheck List
Tests
Related changes
Release note