linux-kernel - Re: [PATCH 0/2] x86: Remove ideal

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Message-ID: <CA+icZUXu7ZNdrv6gTFCRri1ReF2e_87mX5D3Sex7tN+0GBpJ1Q@mail.gmail.com>
Date:   Sat, 27 Mar 2021 13:08:05 +0100
From:   Sedat Dilek <sedat.dilek@...il.com>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     Borislav Petkov <bp@...en8.de>, x86@...nel.org,
        rostedt@...dmis.org, hpa@...or.com, torvalds@...uxfoundation.org,
        linux-kernel@...r.kernel.org, linux-toolchains@...r.kernel.org,
        jpoimboe@...hat.com, alexei.starovoitov@...il.com,
        mhiramat@...nel.org
Subject: Re: [PATCH 0/2] x86: Remove ideal_nops[]

Out of curiosity I tried in my build-environment and my testing-rules
to have comparable numbers...

..without passing "V=1" and "KBUILD_VERBOSE=1" as make-options:

NOTE: Identical linux-config plus LLVM/Clang v12.0.0-rc3.

debian-5.10.19 as host-kernel:
11655.755564957 seconds time elapsed

dileks-5.12-rc3 plus x86-nops as host-kernel:
11941.439350080 seconds time elapsed

I compared the build-times only:
Approx. 04:45 [mm:ss] in the worst case.
( Brewing time of a strong Turkish tea-bag ~5mins. )

I will keep both make-options to see what's going on in my builds.

- Sedat -