cpu load very high

[tiankonglan]

[Subject of the issue]

Description

after uprade code , I run 4 node in pos consensus, one by one cpu load up to 100%

Your environment

• arm Mac 12.5 and aws ec2 server
• v0.5.0 and the newest code commit id : fb219ba224300db08253e67d9cd62d32093cc0da
• develop

Steps to reproduce

I run 4 node in pos consensus

Expected behaviour

cpu load normal

Actual behaviour

one by one cpu load up to 100%

Logs

ec2 server cpu profile top

mac cpu profile top

mac cpu profile pprof pdf profile001.pdf

Proposed solution

consensus_backend.go

func (i *backendIBFT) writeTransactions(
	gasLimit,
	blockNumber uint64,
	transition transitionInterface,
) (executed []*types.Transaction) {
...
	for {
		select {
		case <-blockTimer.C:
			return
		default:
			if stopExecution {
				//	wait for the timer to expire
				continue
			}
...

maybe the code cause the problem , both my envirenment have no transcation

[dbrajovic]

Hey @tiankonglan , thank for raising the issue.

It was discovered by the dev team last week and a fix is under way.

[zivkovicmilos]

Hey @tiankonglan,

We have a PR out to resolve this issue, thank you for the patience 🙏

https://github.com/0xPolygon/polygon-edge/pull/691

[tiankonglan]

great, I will pull it and verify . @zivkovicmilos

[tiankonglan]

I pull the #691 code and run my scence, the cpu is also hight . profile001.pdf @zivkovicmilos @dbrajovic

[dbrajovic]

Thanks for the update, @tiankonglan

We updated the PR with a second fix. Have another go and tell us if the problem persists 👍

[tiankonglan]

@dbrajovic great, I use the PR in my scene, all nodes cpu are normal.