From: Florian Weimer <fw@deneb.enyo.de>
To: Xi Ruoyao via Libc-alpha <libc-alpha@sourceware.org>
Cc: Xi Ruoyao <xry111@xry111.site>, caiyinyu <caiyinyu@loongson.cn>,
Wang Xuerui <i@xen0n.name>,
Adhemerval Zanella Netto <adhemerval.zanella@linaro.org>,
Andreas Schwab <schwab@suse.de>
Subject: Re: [PATCH] linux: Allow avoiding va_list for generic syscall and use it for LoongArch
Date: Fri, 24 Mar 2023 10:47:57 +0100 [thread overview]
Message-ID: <87mt424h0y.fsf@mid.deneb.enyo.de> (raw)
In-Reply-To: <20230324072745.4138-1-xry111@xry111.site> (Xi Ruoyao via Libc-alpha's message of "Fri, 24 Mar 2023 15:27:45 +0800")
* Xi Ruoyao via Libc-alpha:
> Currently GCC generates highly sub-optimal code on architectures where
> the calling convention prefers registers for arugment passing. This is
Typo: ar[gu]ment
> LoongArch is benefited from this (saving about 430 CPU cycles per
> syscall, though I won't call it a significant improvement because
> syscall is "slow" in nature). And in the future we may switch more
> ports to use the generic syscall without a performance regression,
> reducing the number of target-specific syscall.{c,S} files we need to
> maintain.
Does this impact the open* and fcntl* wrappers as well?
next prev parent reply other threads:[~2023-03-24 9:48 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-24 7:27 Xi Ruoyao
2023-03-24 9:47 ` Florian Weimer [this message]
2023-03-24 10:36 ` Xi Ruoyao
2023-03-24 10:45 ` Florian Weimer
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