# Use perf to Measure Cache Miss and TLB Miss
## Installation
Note that if you use *perf* on department **linux9** servers, there is no need to install. Just in case, this is how to install *perf* on your Ubuntu VM (though not so useful):
```bash
sudo apt-get install linux-tools-common linux-tools-5.15.0-130-generic
```
Note that you may need to change the version number to your system's.
## Usage
To measure branch miss:
```bash
perf stat -e branch-misses
```
To measure cache miss:
```bash
perf stat -e cache-misses
```
To collect TLB miss:
```bash
perf stat -e dTLB-load-misses,iTLB-load-misses
```
## **Example**
```bash
perf stat -e branch-misses ls > /dev/null
```
```bash
perf stat -e cache-misses ls > /dev/null
```
```bash
perf stat -e dTLB-load-misses,iTLB-load-misses ls > /dev/null
```
---
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