https://github.com/yutotnh/execution_time_of_file_existence_check

This is used to measure the execution time of the process of checking for the existence of a file.
https://github.com/yutotnh/execution_time_of_file_existence_check

c

Last synced: about 2 months ago
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This is used to measure the execution time of the process of checking for the existence of a file.

• Host: GitHub
• URL: https://github.com/yutotnh/execution_time_of_file_existence_check
• Owner: yutotnh
• License: mit
• Created: 2023-08-10T14:54:46.000Z (over 1 year ago)
• Default Branch: main
• Last Pushed: 2023-08-17T22:48:03.000Z (over 1 year ago)
• Last Synced: 2023-08-18T00:18:31.881Z (over 1 year ago)
• Topics: c
• Language: C
• Homepage:
• Size: 15.6 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# execution_time_of_file_existence_check

This is used to measure the execution time of the process of checking for the existence of a file.

There are three file checking processes, each using the following functions.

- access

- stat

- fopen

## Usage

```text

Usage: ./a.out [FILE] [LOOP_COUNT]

```

## Example

```console

gcc main.c

./a.out dir

```

## Result

CPU : AMD Ryzen 5 5600X 6-Core Processor

```console

$ uname --kernel-name --kernel-release --kernel-version --machine --operating-system --hardware-platform --processor

Linux 5.15.90.1-microsoft-standard-WSL2 #1 SMP Fri Jan 27 02:56:13 UTC 2023 x86_64 x86_64 x86_64 GNU/Linux

$ lsb_release -a

No LSB modules are available.

Distributor ID: Ubuntu

Description:    Ubuntu 22.04.2 LTS

Release:        22.04

Codename:       jammy

$ mkdir dir

$ cd dir

$ for i in {1..100000}; do dd if=/dev/zero of=file$i bs=1024 count=1; done

$ cd ..

$ sudo sh -c "echo 3 >'/proc/sys/vm/drop_caches' && swapoff -a && swapon -a"

$ gcc main.c

$ ./a.out dir

stat:4.8385e-07

access:5.5645e-07

fopen:9.8323e-07

```