| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Date: Fri, 13 Apr 2012 21:59:21 -0300 From: Arnaldo Carvalho de Melo <acme@...hat.com> To: Linus Torvalds <torvalds@...ux-foundation.org> Cc: mingo@...nel.org, hpa@...or.com, paulus@...ba.org, eranian@...gle.com, linux-kernel@...r.kernel.org, efault@....de, peterz@...radead.org, namhyung@...il.com, fweisbec@...il.com, dsahern@...il.com, tglx@...utronix.de, linux-tip-commits@...r.kernel.org Subject: Re: [tip:perf/core] perf ui annotate browser: Allow toggling addr offset view Em Fri, Apr 13, 2012 at 11:25:50AM -0700, Linus Torvalds escreveu: > On Fri, Apr 13, 2012 at 11:07 AM, tip-bot for Arnaldo Carvalho de Melo > <acme@...hat.com> wrote: > > > > The offset view will be the default as soon as operations that deal with > > offsets in a function are handled accodringly, i.e. in offset view the > > above will become: > > > > 2f: jne __list_del_entry+0x84 > > <SNIP> > > 84: mov %rdi,%rcx > > Oh, please please please make this happen. I will in the next days. Glad you like it. > Also, if at all possible, please mark offsets that are referenced by a > branch some way. I do think that the "size of instruction" can be a > very valid piece of information when looking at instruction-level > profiles, but quite frankly, I'm also 100% sure that the fact that an > instruction is a branch target is *more* important. > > Now, fancy arrows etc might be too hard to do (especially without > cluttering things up too much), but marking just the targets would > already be lovely. IOW, turn this mess: > > > : ffffffff810d7e80 <kmem_cache_free>: > 1.91 : ffffffff810d7e80: push %rbp > 0.05 : ffffffff810d7e81: mov %rsp,%rbp > 2.02 : ffffffff810d7e84: push %r12 > 0.00 : ffffffff810d7e86: mov %rdi,%r12 > 0.55 : ffffffff810d7e89: push %rbx > 0.00 : ffffffff810d7e8a: mov %rsi,%rdi > 1.20 : ffffffff810d7e8d: mov %rsi,%rbx > 1.64 : ffffffff810d7e90: callq ffffffff8102a730 <__phys_addr> > 0.05 : ffffffff810d7e95: movabs $0xffffea0000000000,%rdi > 0.22 : ffffffff810d7e9f: shr $0xc,%rax > 0.11 : ffffffff810d7ea3: shl $0x6,%rax > 1.64 : ffffffff810d7ea7: lea (%rax,%rdi,1),%rdi > 42.80 : ffffffff810d7eab: mov (%rdi),%rax > 2.02 : ffffffff810d7eae: test $0x80,%ah > 0.00 : ffffffff810d7eb1: jne ffffffff810d7ef6 > <kmem_cache_free+0x76> > 0.22 : ffffffff810d7eb3: mov 0x8(%rbp),%r9 > 7.14 : ffffffff810d7eb7: mov (%r12),%rax > 0.65 : ffffffff810d7ebb: add %gs:0xcb88,%rax > 4.58 : ffffffff810d7ec4: mov 0x8(%rax),%rdx > > (which has tons of unnecessary white-space too - shades of G+) into Grin ;-) Yeah, even the : column isn't needed I think. > <kmem_cache_free>: > 1.91 : push %rbp > 0.05 : mov %rsp,%rbp > 2.02 : push %r12 > 0.00 : mov %rdi,%r12 > 0.55 : push %rbx > 0.00 : mov %rsi,%rdi > 1.20 : mov %rsi,%rbx > 1.64 : callq ffffffff8102a730 <__phys_addr> > 0.05 : movabs $0xffffea0000000000,%rdi > 0.22 : shr $0xc,%rax > 0.11 : shl $0x6,%rax > 1.64 : lea (%rax,%rdi,1),%rdi > 42.80 : mov (%rdi),%rax > 2.02 : test $0x80,%ah > 0.00 : jne kmem_cache_free+0x76 > 0.22 : 0x33: mov 0x8(%rbp),%r9 > 7.14 : 0x37: mov (%r12),%rax > 0.65 : add %gs:0xcb88,%rax > 4.58 : mov 0x8(%rax),%rdx > .... > > or something. I think the "callq ffffffff8102a730 <__phys_addr>" > could also be prettified with *zero* downside. Yeah, no need to see the address in default mode. > Sure, leave some magic keycombination to get the "full information", but .. Yeah, we have o to toggle offset view + s to toggle source code view, etc. > Linus -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists