### Install automaxprocs Go Package

Source: https://github.com/uber-go/automaxprocs/blob/master/README.md

This command installs the automaxprocs Go package using the go get command. It ensures that the latest version of the package is downloaded and available for use in your Go projects. This is a prerequisite for utilizing the package's functionality.

```bash
go get -u go.uber.org/automaxprocs
```

--------------------------------

### Combining GOMAXPROCS Options in Go

Source: https://context7.com/uber-go/automaxprocs/llms.txt

Configure GOMAXPROCS using multiple options simultaneously for comprehensive control. This example combines custom logging, a minimum GOMAXPROCS value, and a standard rounding function. It demonstrates how to set up a robust configuration for an application starting up.

```go
package main

import (
    "log"
    "math"
    "os"
    "runtime"

    "go.uber.org/automaxprocs/maxprocs"
)

func main() {
    logger := log.New(os.Stderr, "[maxprocs] ", log.LstdFlags)

    undo, err := maxprocs.Set(
        maxprocs.Logger(logger.Printf),
        maxprocs.Min(2),
        maxprocs.RoundQuotaFunc(func(v float64) int {
            return int(math.Round(v))
        }),
    )
    if err != nil {
        logger.Fatalf("failed to set GOMAXPROCS: %v", err)
    }
    defer undo()

    logger.Printf("Application starting with GOMAXPROCS=%d", runtime.GOMAXPROCS(0))

    // Run your application
    startServer()
}

func startServer() {
    // Application implementation
}
```

--------------------------------

### Initialize automaxprocs in Go Application

Source: https://github.com/uber-go/automaxprocs/blob/master/README.md

This Go code snippet demonstrates how to integrate the automaxprocs package into an application. By importing the package as a blank identifier (`_`), its initialization logic runs automatically when the program starts. This ensures that GOMAXPROCS is set according to the container's CPU quota without explicit calls in your application code.

```go
import _ "go.uber.org/automaxprocs"

func main() {
  // Your application logic here.
}
```

--------------------------------

### Setting Minimum GOMAXPROCS in Go

Source: https://context7.com/uber-go/automaxprocs/llms.txt

Ensure GOMAXPROCS does not fall below a specified minimum value using the maxprocs.Min() option. This is useful when a certain level of concurrency is required regardless of the container's CPU allocation. The example sets a minimum of 2 GOMAXPROCS, overriding smaller CPU quotas.

```go
package main

import (
    "log"
    "runtime"

    "go.uber.org/automaxprocs/maxprocs"
)

func main() {
    // Even if CPU quota suggests 1 core, use at least 2
    undo, err := maxprocs.Set(
        maxprocs.Logger(log.Printf),
        maxprocs.Min(2),
    )
    if err != nil {
        log.Fatalf("failed to set GOMAXPROCS: %v", err)
    }
    defer undo()

    // GOMAXPROCS will be at least 2
    log.Printf("GOMAXPROCS: %d", runtime.GOMAXPROCS(0))

    // Application logic
}
```

--------------------------------

### Custom Rounding Function for GOMAXPROCS in Go

Source: https://context7.com/uber-go/automaxprocs/llms.txt

Define a custom rounding function for fractional CPU quotas using maxprocs.RoundQuotaFunc(). This allows precise control over how the library converts the CPU quota (e.g., 1.5 CPUs) into an integer GOMAXPROCS value. The example uses math.Ceil to always round up.

```go
package main

import (
    "log"
    "math"
    "runtime"

    "go.uber.org/automaxprocs/maxprocs"
)

func main() {
    // Use ceiling instead of default rounding
    ceilRound := func(v float64) int {
        return int(math.Ceil(v))
    }

    undo, err := maxprocs.Set(
        maxprocs.Logger(log.Printf),
        maxprocs.RoundQuotaFunc(ceilRound),
    )
    if err != nil {
        log.Fatalf("failed to set GOMAXPROCS: %v", err)
    }
    defer undo()

    // With CPU quota 1.5:
    // Default rounding: GOMAXPROCS=2 (rounds to nearest)
    // Ceiling rounding: GOMAXPROCS=2 (rounds up)
    // Floor rounding would give: GOMAXPROCS=1 (rounds down)

    log.Printf("GOMAXPROCS: %d", runtime.GOMAXPROCS(0))
}
```

--------------------------------

### Combining Multiple Options

Source: https://context7.com/uber-go/automaxprocs/llms.txt

Use multiple configuration options together in a single call to `maxprocs.Set()` for fine-grained control over GOMAXPROCS setting.

```APIDOC
## Combining Multiple Options

### Description
Use multiple configuration options together in a single call to `maxprocs.Set()` for fine-grained control over GOMAXPROCS setting.

### Method
`maxprocs.Set(option1, option2, ...)`

### Endpoint
N/A (Function Call)

### Parameters
Accepts any valid options for `maxprocs.Set()`, such as `Logger`, `Min`, `RoundQuotaFunc`, etc.

### Request Example
```go
package main

import (
    "log"
    "math"
    "os"
    "runtime"

    "go.uber.org/automaxprocs/maxprocs"
)

func main() {
    logger := log.New(os.Stderr, "[maxprocs] ", log.LstdFlags)

    undo, err := maxprocs.Set(
        maxprocs.Logger(logger.Printf),
        maxprocs.Min(2),
        maxprocs.RoundQuotaFunc(func(v float64) int {
            return int(math.Round(v))
        }),
    )
    if err != nil {
        logger.Fatalf("failed to set GOMAXPROCS: %v", err)
    }
    defer undo()

    logger.Printf("Application starting with GOMAXPROCS=%d", runtime.GOMAXPROCS(0))

    // Run your application
    startServer()
}

func startServer() {
    // Application implementation
}
```

### Response
#### Success Response (N/A)
N/A

#### Response Example
N/A
```

--------------------------------

### Automatic GOMAXPROCS Configuration in Go

Source: https://context7.com/uber-go/automaxprocs/llms.txt

Automatically configure GOMAXPROCS by importing the package with a blank identifier. This sets GOMAXPROCS during package initialization based on container CPU quotas. No explicit function calls are needed after import. The code demonstrates setting up an HTTP server that reports the configured GOMAXPROCS.

```go
package main

import (
    _ "go.uber.org/automaxprocs"
    "fmt"
    "net/http"
    "runtime"
)

func main() {
    // GOMAXPROCS is already set based on CPU quota
    fmt.Printf("Running with GOMAXPROCS=%d\n", runtime.GOMAXPROCS(0))

    http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
        fmt.Fprintf(w, "GOMAXPROCS: %d", runtime.GOMAXPROCS(0))
    })

    http.ListenAndServe(":8080", nil)
}
```

--------------------------------

### Automatic GOMAXPROCS Configuration

Source: https://context7.com/uber-go/automaxprocs/llms.txt

Import the package with a blank identifier to automatically configure GOMAXPROCS during package initialization. This is the simplest way to enable the optimization.

```APIDOC
## Automatic GOMAXPROCS Configuration

### Description
Import the package with a blank identifier to automatically configure GOMAXPROCS during package initialization. This is the simplest way to enable the optimization.

### Method
Import (Blank Identifier)

### Endpoint
N/A (Package Initialization)

### Parameters
None

### Request Example
```go
package main

import (
    _ "go.uber.org/automaxprocs"
    "fmt"
    "net/http"
    "runtime"
)

func main() {
    // GOMAXPROCS is already set based on CPU quota
    fmt.Printf("Running with GOMAXPROCS=%d\n", runtime.GOMAXPROCS(0))

    http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
        fmt.Fprintf(w, "GOMAXPROCS: %d", runtime.GOMAXPROCS(0))
    })

    http.ListenAndServe(":8080", nil)
}
```

### Response
#### Success Response (N/A)
N/A

#### Response Example
N/A
```

--------------------------------

### Configuration with Logging

Source: https://context7.com/uber-go/automaxprocs/llms.txt

Enable debug logging by providing a logger function to `maxprocs.Set()`. This helps in understanding how the GOMAXPROCS value is determined.

```APIDOC
## Configuration with Logging

### Description
Enable debug logging by providing a logger function to `maxprocs.Set()`. This helps in understanding how the GOMAXPROCS value is determined.

### Method
`maxprocs.Set(maxprocs.Logger(logger_function))`

### Endpoint
N/A (Function Call)

### Parameters
- **Logger** (func(string, ...interface{})) - A function that accepts format strings and arguments, similar to `log.Printf`.

### Request Example
```go
package main

import (
    "log"
    "os"

    "go.uber.org/automaxprocs/maxprocs"
)

func main() {
    logger := log.New(os.Stdout, "[automaxprocs] ", log.LstdFlags)

    undo, err := maxprocs.Set(maxprocs.Logger(logger.Printf))
    if err != nil {
        log.Fatalf("failed to set GOMAXPROCS: %v", err)
    }
    defer undo()

    // Logs output like:
    // [automaxprocs] maxprocs: Updating GOMAXPROCS=2: determined from CPU quota

    // Application continues
}
```

### Response
#### Success Response (N/A)
N/A

#### Response Example
N/A
```

--------------------------------

### Go: Set GOMAXPROCS respecting environment variable

Source: https://context7.com/uber-go/automaxprocs/llms.txt

This Go code snippet demonstrates how the automaxprocs library respects the GOMAXPROCS environment variable if it's already set. It logs a message indicating if the variable is set and then attempts to configure GOMAXPROCS using the library, deferring to the environment if present. The undo function is used to clean up the configuration.

```go
package main

import (
    "log"
    "os"
    "runtime"

    "go.uber.org/automaxprocs/maxprocs"
)

func main() {
    // If GOMAXPROCS env var is set, automaxprocs won't override it
    if val := os.Getenv("GOMAXPROCS"); val != "" {
        log.Printf("GOMAXPROCS already set to %s via environment")
    }

    undo, err := maxprocs.Set(maxprocs.Logger(log.Printf))
    if err != nil {
        log.Fatalf("failed to set GOMAXPROCS: %v", err)
    }
    defer undo()

    // If GOMAXPROCS was set, logs:
    // maxprocs: Honoring GOMAXPROCS="4" as set in environment

    log.Printf("Running with GOMAXPROCS=%d", runtime.GOMAXPROCS(0))
}
```

--------------------------------

### GOMAXPROCS Configuration with Debug Logging in Go

Source: https://context7.com/uber-go/automaxprocs/llms.txt

Enable debug logging during GOMAXPROCS configuration by providing a logger function to maxprocs.Set(). This helps in understanding how the library determines the GOMAXPROCS value from CPU quotas. The logger function should accept a format string and arguments, similar to log.Printf.

```go
package main

import (
    "log"
    "os"

    "go.uber.org/automaxprocs/maxprocs"
)

func main() {
    logger := log.New(os.Stdout, "[automaxprocs] ", log.LstdFlags)

    undo, err := maxprocs.Set(maxprocs.Logger(logger.Printf))
    if err != nil {
        log.Fatalf("failed to set GOMAXPROCS: %v", err)
    }
    defer undo()

    // Logs output like:
    // [automaxprocs] maxprocs: Updating GOMAXPROCS=2: determined from CPU quota

    // Application continues
}
```

--------------------------------

### Manual Configuration with maxprocs.Set()

Source: https://context7.com/uber-go/automaxprocs/llms.txt

Explicitly control when GOMAXPROCS is set and handle errors programmatically using the `maxprocs.Set()` function. This function returns an `undo` function to restore the original GOMAXPROCS value.

```APIDOC
## Manual Configuration with maxprocs.Set()

### Description
Explicitly control when GOMAXPROCS is set and handle errors programmatically using the `maxprocs.Set()` function. This function returns an `undo` function to restore the original GOMAXPROCS value.

### Method
`maxprocs.Set()`

### Endpoint
N/A (Function Call)

### Parameters
None (for basic usage)

### Request Example
```go
package main

import (
    "log"
    "runtime"

    "go.uber.org/automaxprocs/maxprocs"
)

func main() {
    // Set GOMAXPROCS and get an undo function
    undo, err := maxprocs.Set()
    if err != nil {
        log.Fatalf("failed to set GOMAXPROCS: %v", err)
    }
    defer undo()

    log.Printf("GOMAXPROCS set to %d", runtime.GOMAXPROCS(0))

    // Application logic here
    // When undo() is called on defer, GOMAXPROCS is restored
}
```

### Response
#### Success Response (N/A)
N/A

#### Response Example
N/A
```

--------------------------------

### Manual GOMAXPROCS Configuration with maxprocs.Set() in Go

Source: https://context7.com/uber-go/automaxprocs/llms.txt

Manually control GOMAXPROCS configuration and error handling using the maxprocs.Set() function. This provides explicit control over when GOMAXPROCS is adjusted and allows for programmatic error management. The function returns an 'undo' function to restore the original GOMAXPROCS value, typically used with defer.

```go
package main

import (
    "log"
    "runtime"

    "go.uber.org/automaxprocs/maxprocs"
)

func main() {
    // Set GOMAXPROCS and get an undo function
    undo, err := maxprocs.Set()
    if err != nil {
        log.Fatalf("failed to set GOMAXPROCS: %v", err)
    }
    defer undo()

    log.Printf("GOMAXPROCS set to %d", runtime.GOMAXPROCS(0))

    // Application logic here
    // When undo() is called on defer, GOMAXPROCS is restored
}
```

--------------------------------

### Setting Minimum GOMAXPROCS

Source: https://context7.com/uber-go/automaxprocs/llms.txt

Ensure GOMAXPROCS never falls below a specified minimum value by using the `maxprocs.Min()` option in `maxprocs.Set()`.

```APIDOC
## Setting Minimum GOMAXPROCS

### Description
Ensure GOMAXPROCS never falls below a specified minimum value by using the `maxprocs.Min()` option in `maxprocs.Set()`.

### Method
`maxprocs.Set(maxprocs.Min(minimum_value))`

### Endpoint
N/A (Function Call)

### Parameters
- **Min** (int) - The minimum value for GOMAXPROCS.

### Request Example
```go
package main

import (
    "log"
    "runtime"

    "go.uber.org/automaxprocs/maxprocs"
)

func main() {
    // Even if CPU quota suggests 1 core, use at least 2
    undo, err := maxprocs.Set(
        maxprocs.Logger(log.Printf),
        maxprocs.Min(2),
    )
    if err != nil {
        log.Fatalf("failed to set GOMAXPROCS: %v", err)
    }
    defer undo()

    // GOMAXPROCS will be at least 2
    log.Printf("GOMAXPROCS: %d", runtime.GOMAXPROCS(0))

    // Application logic
}
```

### Response
#### Success Response (N/A)
N/A

#### Response Example
N/A
```

--------------------------------

### Custom Rounding Function

Source: https://context7.com/uber-go/automaxprocs/llms.txt

Control how fractional CPU quotas are converted to integer GOMAXPROCS values by providing a custom rounding function using `maxprocs.RoundQuotaFunc()`.

```APIDOC
## Custom Rounding Function

### Description
Control how fractional CPU quotas are converted to integer GOMAXPROCS values by providing a custom rounding function using `maxprocs.RoundQuotaFunc()`.

### Method
`maxprocs.Set(maxprocs.RoundQuotaFunc(rounding_function))`

### Endpoint
N/A (Function Call)

### Parameters
- **RoundQuotaFunc** (func(float64) int) - A function that takes a float64 (CPU quota) and returns an int (GOMAXPROCS value).

### Request Example
```go
package main

import (
    "log"
    "math"
    "runtime"

    "go.uber.org/automaxprocs/maxprocs"
)

func main() {
    // Use ceiling instead of default rounding
    ceilRound := func(v float64) int {
        return int(math.Ceil(v))
    }

    undo, err := maxprocs.Set(
        maxprocs.Logger(log.Printf),
        maxprocs.RoundQuotaFunc(ceilRound),
    )
    if err != nil {
        log.Fatalf("failed to set GOMAXPROCS: %v", err)
    }
    defer undo()

    // With CPU quota 1.5:
    // Default rounding: GOMAXPROCS=2 (rounds to nearest)
    // Ceiling rounding: GOMAXPROCS=2 (rounds up)
    // Floor rounding would give: GOMAXPROCS=1 (rounds down)

    log.Printf("GOMAXPROCS: %d", runtime.GOMAXPROCS(0))
}
```

### Response
#### Success Response (N/A)
N/A

#### Response Example
N/A
```

=== COMPLETE CONTENT === This response contains all available snippets from this library. No additional content exists. Do not make further requests.