[Webkit-unassigned] [Bug 273675] New: Need to change the method for determining the number of CPUs on Linux

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=273675

            Bug ID: 273675
           Summary: Need to change the method for determining the number
                    of CPUs on Linux
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Tools / Tests
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: haiweiwang1109 at 163.com

Determine the number of CPUs on Linux by directly interpreting /proc/cpuinfo, as using the nproc tool may yield incorrect results (`determineNumberOfCPUs` in Tools/Scripts/webkitdirs.pm). Incorrect results (usually bigger than the true number) can lead to OOM issue.

In my ubuntu virtual machine:

```
$ nproc
6
$ nproc --all
128
```

And there are similar discussions on the Arch Linux forum as well.
-[nproc indicating higher number of cpu cores than CPU has](https://bbs.archlinux.org/viewtopic.php?id=278874)

```
$ nproc
24
$ nproc --all
128
```

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