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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.
		
			
				
	
	
		
			73 lines
		
	
	
		
			2.0 KiB
		
	
	
	
		
			Go
		
	
	
	
	
	
			
		
		
	
	
			73 lines
		
	
	
		
			2.0 KiB
		
	
	
	
		
			Go
		
	
	
	
	
	
| // Copyright (c) 2015-2021 MinIO, Inc.
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| //
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| // This file is part of MinIO Object Storage stack
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| //
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| // This program is free software: you can redistribute it and/or modify
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| // it under the terms of the GNU Affero General Public License as published by
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| // the Free Software Foundation, either version 3 of the License, or
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| // (at your option) any later version.
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| //
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| // This program is distributed in the hope that it will be useful
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| // but WITHOUT ANY WARRANTY; without even the implied warranty of
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| // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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| // GNU Affero General Public License for more details.
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| //
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| // You should have received a copy of the GNU Affero General Public License
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| // along with this program.  If not, see <http://www.gnu.org/licenses/>.
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| 
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| package cmd
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| 
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| import (
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| 	"context"
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| 	"testing"
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| 
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| 	"github.com/minio/minio/internal/dsync"
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| )
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| 
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| // Tests lock rpc client.
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| func TestLockRESTlient(t *testing.T) {
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| 	// These should not be connectable.
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| 	endpoint, err := NewEndpoint("http://localhost:9876")
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| 	if err != nil {
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| 		t.Fatalf("unexpected error %v", err)
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| 	}
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| 	endpointLocal, err := NewEndpoint("http://localhost:9012")
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| 	if err != nil {
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| 		t.Fatalf("unexpected error %v", err)
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| 	}
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| 	endpointLocal.IsLocal = true
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| 
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| 	ctx, cancel := context.WithCancel(context.Background())
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| 	defer cancel()
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| 	err = initGlobalLockGrid(ctx, []PoolEndpoints{{Endpoints: Endpoints{endpoint, endpointLocal}}})
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| 	if err != nil {
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| 		t.Fatal(err)
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| 	}
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| 
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| 	lkClient := newlockRESTClient(endpoint)
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| 	if lkClient.IsOnline() {
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| 		t.Fatalf("unexpected result. connection was online")
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| 	}
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| 
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| 	// Attempt all calls.
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| 	_, err = lkClient.RLock(context.Background(), dsync.LockArgs{})
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| 	if err == nil {
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| 		t.Fatal("Expected for Rlock to fail")
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| 	}
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| 
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| 	_, err = lkClient.Lock(context.Background(), dsync.LockArgs{})
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| 	if err == nil {
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| 		t.Fatal("Expected for Lock to fail")
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| 	}
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| 
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| 	_, err = lkClient.RUnlock(context.Background(), dsync.LockArgs{})
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| 	if err == nil {
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| 		t.Fatal("Expected for RUnlock to fail")
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| 	}
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| 
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| 	_, err = lkClient.Unlock(context.Background(), dsync.LockArgs{})
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| 	if err == nil {
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| 		t.Fatal("Expected for Unlock to fail")
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| 	}
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| }
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