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Arnaldo Carvalho de Melo 51f39603b5 perf annotate browser: Allow showing offsets in more than just jump targets Jesper wanted to see offsets at callq sites when doing some performance investigation related to retpolines, so save him some time by providing a 'O' hotkey to allow showing offsets from function start at call instructions or in all instructions, just go on pressing 'O' till the offsets you need appear. Example: Starts with: Samples: 64 of event 'cycles:ppp', 100000 Hz, Event count (approx.): 318963 ixgbe_read_reg /proc/kcore Percent│ ↑ je 2a │ ┌──cmp $0xffffffff,%r13d │ ├──je d0 │ │ mov $0x53e3,%edi │ │→ callq __const_udelay │ │ sub $0x1,%r15d │ │↑ jne 83 │ │ mov 0x8(%rbp),%rax │ │ testb $0x20,0x1799(%rax) │ │↑ je 2a │ │ mov 0x200(%rax),%rdi │ │ mov %r13d,%edx │ │ mov $0xffffffffc02595d8,%rsi │ │→ callq netdev_warn │ │↑ jmpq 2a │d0:└─→mov 0x8(%rbp),%rsi │ mov %rbp,%rdi │ mov %eax,0x4(%rsp) │ → callq ixgbe_remove_adapter.isra.77 │ mov 0x4(%rsp),%eax Press 'h' for help on key bindings ============================================================================ Pess 'O': Samples: 64 of event 'cycles:ppp', 100000 Hz, Event count (approx.): 318963 ixgbe_read_reg /proc/kcore Percent│ ↑ je 2a │ ┌──cmp $0xffffffff,%r13d │ ├──je d0 │ │ mov $0x53e3,%edi │99:│→ callq __const_udelay │ │ sub $0x1,%r15d │ │↑ jne 83 │ │ mov 0x8(%rbp),%rax │ │ testb $0x20,0x1799(%rax) │ │↑ je 2a │ │ mov 0x200(%rax),%rdi │ │ mov %r13d,%edx │ │ mov $0xffffffffc02595d8,%rsi │c6:│→ callq netdev_warn │ │↑ jmpq 2a │d0:└─→mov 0x8(%rbp),%rsi │ mov %rbp,%rdi │ mov %eax,0x4(%rsp) │db: → callq ixgbe_remove_adapter.isra.77 │ mov 0x4(%rsp),%eax Press 'h' for help on key bindings ============================================================================ Press 'O' again: Samples: 64 of event 'cycles:ppp', 100000 Hz, Event count (approx.): 318963 ixgbe_read_reg /proc/kcore Percent│8c: ↑ je 2a │8e:┌──cmp $0xffffffff,%r13d │92:├──je d0 │94:│ mov $0x53e3,%edi │99:│→ callq __const_udelay │9e:│ sub $0x1,%r15d │a2:│↑ jne 83 │a4:│ mov 0x8(%rbp),%rax │a8:│ testb $0x20,0x1799(%rax) │af:│↑ je 2a │b5:│ mov 0x200(%rax),%rdi │bc:│ mov %r13d,%edx │bf:│ mov $0xffffffffc02595d8,%rsi │c6:│→ callq netdev_warn │cb:│↑ jmpq 2a │d0:└─→mov 0x8(%rbp),%rsi │d4: mov %rbp,%rdi │d7: mov %eax,0x4(%rsp) │db: → callq ixgbe_remove_adapter.isra.77 │e0: mov 0x4(%rsp),%eax Press 'h' for help on key bindings ============================================================================ Press 'O' again and it will show just jump target offsets. Suggested-by: Jesper Dangaard Brouer <brouer@redhat.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexei Starovoitov <alexei.starovoitov@gmail.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: David Ahern <dsahern@gmail.com> Cc: Jin Yao <yao.jin@linux.intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Martin Liška <mliska@suse.cz> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Ravi Bangoria <ravi.bangoria@linux.vnet.ibm.com> Cc: Thomas Richter <tmricht@linux.vnet.ibm.com> Cc: Wang Nan <wangnan0@huawei.com> Link: https://lkml.kernel.org/n/tip-upp6pfdetwlsx18ec2uf1od4@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>		2018-04-12 10:33:09 -03:00
arch	perf/x86/intel: Move regs->flags EXACT bit init	2018-04-05 09:28:40 +02:00
block	treewide: simplify Kconfig dependencies for removed archs	2018-03-26 15:55:57 +02:00
certs	certs/blacklist_nohashes.c: fix const confusion in certs blacklist	2018-02-21 15:35:43 -08:00
crypto	mn10300: Remove the architecture	2018-03-09 23:19:56 +01:00
Documentation	Merge branch 'syscalls-next' of git://git.kernel.org/pub/scm/linux/kernel/git/brodo/linux	2018-04-02 21:22:12 -07:00
drivers	Merge branch 'syscalls-next' of git://git.kernel.org/pub/scm/linux/kernel/git/brodo/linux	2018-04-02 21:22:12 -07:00
firmware	kbuild: remove all dummy assignments to obj-	2017-11-18 11:46:06 +09:00
fs	Merge branch 'syscalls-next' of git://git.kernel.org/pub/scm/linux/kernel/git/brodo/linux	2018-04-02 21:22:12 -07:00
include	Merge branch 'syscalls-next' of git://git.kernel.org/pub/scm/linux/kernel/git/brodo/linux	2018-04-02 21:22:12 -07:00
init	Merge branch 'syscalls-next' of git://git.kernel.org/pub/scm/linux/kernel/git/brodo/linux	2018-04-02 21:22:12 -07:00
ipc	Merge branch 'syscalls-next' of git://git.kernel.org/pub/scm/linux/kernel/git/brodo/linux	2018-04-02 21:22:12 -07:00
kernel	tracing/uprobe_event: Fix strncpy corner case	2018-04-10 20:14:11 +02:00
lib	arch: remove obsolete architecture ports	2018-04-02 20:20:12 -07:00
LICENSES	LICENSES: Add MPL-1.1 license	2018-01-06 10:59:44 -07:00
mm	Merge branch 'syscalls-next' of git://git.kernel.org/pub/scm/linux/kernel/git/brodo/linux	2018-04-02 21:22:12 -07:00
net	Merge branch 'syscalls-next' of git://git.kernel.org/pub/scm/linux/kernel/git/brodo/linux	2018-04-02 21:22:12 -07:00
samples	arch: remove tile port	2018-03-16 10:56:03 +01:00
scripts	arch: remove obsolete architecture ports	2018-04-02 20:20:12 -07:00
security	integrity/security: fix digsig.c build error with header file	2018-02-22 20:09:08 -08:00
sound	main drm pull request for v4.17	2018-04-02 07:59:23 -07:00
tools	perf annotate browser: Allow showing offsets in more than just jump targets	2018-04-12 10:33:09 -03:00
usr	initramfs: fix initramfs rebuilds w/ compression after disabling	2017-11-03 07:39:19 -07:00
virt	kvm/arm fixes for 4.16, take 2	2018-03-15 21:45:37 +01:00
.cocciconfig	scripts: add Linux .cocciconfig for coccinelle	2016-07-22 12:13:39 +02:00
.get_maintainer.ignore
.gitattributes	.gitattributes: set git diff driver for C source code files	2016-10-07 18:46:30 -07:00
.gitignore	.gitignore: ignore ASN.1 auto generated files	2018-02-14 21:05:38 +01:00
.mailmap	mailmap: Update email address for Gregory CLEMENT	2018-03-09 17:48:50 +01:00
COPYING
CREDITS	MAINTAINERS/CREDITS: Drop METAG ARCHITECTURE	2018-03-05 16:34:24 +00:00
Kbuild	Kbuild updates for v4.15	2017-11-17 17:45:29 -08:00
Kconfig	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
MAINTAINERS	arch: remove obsolete architecture ports	2018-04-02 20:20:12 -07:00
Makefile	arch: remove obsolete architecture ports	2018-04-02 20:20:12 -07:00
README	README: add a new README file, pointing to the Documentation/	2016-10-24 08:12:35 -02:00

README

Linux kernel
============

This file was moved to Documentation/admin-guide/README.rst

Please notice that there are several guides for kernel developers and users.
These guides can be rendered in a number of formats, like HTML and PDF.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
See Documentation/00-INDEX for a list of what is contained in each file.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.