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Re: [Qemu-devel] [PATCH 1/3] configure: add option to disable -fstack-pr
From: |
Paolo Bonzini |
Subject: |
Re: [Qemu-devel] [PATCH 1/3] configure: add option to disable -fstack-protector flags |
Date: |
Thu, 09 Jan 2014 23:40:33 +0100 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130923 Thunderbird/17.0.9 |
Il 09/01/2014 22:55, Steven Noonan ha scritto:
> From: Steven Noonan <address@hidden>
>
> The -fstack-protector flag family is useful for ensuring safety and for
> debugging, but has a performance impact. Here's a boot time comparison between
> a QEMU build of qemu-system-arm with and without the -fstack-protector-all
> flag:
>
> # WITHOUT -fstack-protector-all
> address@hidden ~]# systemd-analyze
> Startup finished in 1.744s (kernel) + 11.345s (initrd) + 47.164s
> (userspace) = 1min 255ms
>
> # WITH -fstack-protector-all
> address@hidden ~]# systemd-analyze
> Startup finished in 1.843s (kernel) + 12.262s (initrd) + 1min 3.480s
> (userspace) = 1min 17.587s
Can you try -fstack-protector-strong?
Probably the right thing to do is to pick in order
-fstack-protector-strong, -fstack-protector, and nothing.
Paolo
- [Qemu-devel] [PATCH 1/3] configure: add option to disable -fstack-protector flags, Steven Noonan, 2014/01/09
- Re: [Qemu-devel] [PATCH 1/3] configure: add option to disable -fstack-protector flags, Peter Maydell, 2014/01/09
- Re: [Qemu-devel] [PATCH 1/3] configure: add option to disable -fstack-protector flags,
Paolo Bonzini <=
- Re: [Qemu-devel] [PATCH 1/3] configure: add option to disable -fstack-protector flags, Brad Smith, 2014/01/09
- Re: [Qemu-devel] [PATCH 1/3] configure: add option to disable -fstack-protector flags, Noonan, Steven, 2014/01/10
- Re: [Qemu-devel] [PATCH 1/3] configure: add option to disable -fstack-protector flags, Noonan, Steven, 2014/01/10
- Re: [Qemu-devel] [PATCH 1/3] configure: add option to disable -fstack-protector flags, Stefan Weil, 2014/01/11
- Re: [Qemu-devel] [PATCH 1/3] configure: add option to disable -fstack-protector flags, Paolo Bonzini, 2014/01/13
- [Qemu-devel] [PATCH] configure: add option to disable -fstack-protector flags, Steven Noonan, 2014/01/13
- Re: [Qemu-devel] [PATCH] configure: add option to disable -fstack-protector flags, Stefan Weil, 2014/01/13
- Re: [Qemu-devel] [PATCH] configure: add option to disable -fstack-protector flags, Noonan, Steven, 2014/01/13