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separate lock from common grid to avoid epoll contention (#20180)

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epoll contention on TCP causes latency build-up when
we have high volume ingress. This PR is an attempt to
relieve this pressure.

upstream issue https://github.com/golang/go/issues/65064
It seems to be a deeper problem; haven't yet tried the fix
provide in this issue, but however this change without
changing the compiler helps. 

Of course, this is a workaround for now, hoping for a
more comprehensive fix from Go runtime.
This commit is contained in:
Harshavardhana
2024-07-29 11:10:04 -07:00
committed by GitHub
parent 6651c655cb
commit a17f14f73a
13 changed files with 121 additions and 31 deletions
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18
cmd/routers.go
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@@ -26,20 +26,28 @@ import (
// Composed function registering routers for only distributed Erasure setup.
func registerDistErasureRouters(router *mux.Router, endpointServerPools EndpointServerPools) {
var (
lockGrid = globalLockGrid.Load()
commonGrid = globalGrid.Load()
)
// Register storage REST router only if its a distributed setup.
registerStorageRESTHandlers(router, endpointServerPools, globalGrid.Load())
registerStorageRESTHandlers(router, endpointServerPools, commonGrid)
// Register peer REST router only if its a distributed setup.
registerPeerRESTHandlers(router, globalGrid.Load())
registerPeerRESTHandlers(router, commonGrid)
// Register bootstrap REST router for distributed setups.
registerBootstrapRESTHandlers(globalGrid.Load())
registerBootstrapRESTHandlers(commonGrid)
// Register distributed namespace lock routers.
registerLockRESTHandlers()
registerLockRESTHandlers(lockGrid)
// Add lock grid to router
router.Handle(grid.RouteLockPath, adminMiddleware(lockGrid.Handler(storageServerRequestValidate), noGZFlag, noObjLayerFlag))
// Add grid to router
router.Handle(grid.RoutePath, adminMiddleware(globalGrid.Load().Handler(storageServerRequestValidate), noGZFlag, noObjLayerFlag))
router.Handle(grid.RoutePath, adminMiddleware(commonGrid.Handler(storageServerRequestValidate), noGZFlag, noObjLayerFlag))
}
// List of some generic middlewares which are applied for all incoming requests.