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Latency Comparison Numbers (~2012) | |
---------------------------------- | |
L1 cache reference 0.5 ns | |
Branch mispredict 5 ns | |
L2 cache reference 7 ns 14x L1 cache | |
Mutex lock/unlock 25 ns | |
Main memory reference 100 ns 20x L2 cache, 200x L1 cache | |
Compress 1K bytes with Zippy 3,000 ns 3 us | |
Send 1K bytes over 1 Gbps network 10,000 ns 10 us | |
Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD |
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Linux pstree shows running processes as a tree. The tree is rooted at either pid or init if pid is omitted. If a user name is specified, all process trees rooted at processes owned by that user are shown. | |
Install pstree | |
#On Mac OS | |
brew install pstree | |
#On Fedora/Red Hat/CentOS | |
yum install psmisc #using psmisc package for pstree | |
#On Ubuntu/Debian APT |
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package main | |
import ( | |
"context" | |
"log" | |
"net/http" | |
"os" | |
"os/signal" | |
"time" | |
) |
- First, install GNU tar:
brew install --with-default-names gnu-tar
- Ensure at least 4GB RAM available to Docker for Mac
go get k8s.io/kubernetes && cd $GOPATH/src/k8s.io/kubernetes