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27fafab59a
The -q/--quiet option is to suppress any message. Sometimes users just
want to see the numbers and it can be used for that case.
Before:
$ perf report | head -15
Failed to open /lib/modules/3.19.3-3-ARCH/kernel/fs/ext4/ext4.ko.gz, continuing without symbols
Failed to open /lib/modules/3.19.3-3-ARCH/kernel/fs/jbd2/jbd2.ko.gz, continuing without symbols
Failed to open /tmp/perf-14507.map, continuing without symbols
...
# To display the perf.data header info, please use --header/--header-only options.
#
#
# Total Lost Samples: 0
#
# Samples: 39K of event 'cycles'
# Event count (approx.): 30444796573
#
# Overhead Command Shared Object Symbol
# ........ ........... ................... .........................
#
9.28% swapper [kernel.vmlinux] [k] intel_idle
5.64% swapper [kernel.vmlinux] [k] native_write_msr_safe
1.93% swapper [kernel.vmlinux] [k] __switch_to
1.89% swapper [kernel.vmlinux] [k] menu_select
1.75% sched-pipe [kernel.vmlinux] [k] __switch_to
After:
$ perf report -q | head
9.28% swapper [kernel.vmlinux] [k] intel_idle
5.64% swapper [kernel.vmlinux] [k] native_write_msr_safe
1.93% swapper [kernel.vmlinux] [k] __switch_to
1.89% swapper [kernel.vmlinux] [k] menu_select
1.75% sched-pipe [kernel.vmlinux] [k] __switch_to
1.67% swapper [kernel.vmlinux] [k] cpu_startup_entry
1.48% sched-pipe [kernel.vmlinux] [k] enqueue_entity
1.46% swapper [kernel.vmlinux] [k] __schedule
1.36% swapper [kernel.vmlinux] [k] native_read_tsc
1.34% sched-pipe [kernel.vmlinux] [k] __schedule
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Suggested-and-Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: kernel-team@lge.com
Link: http://lkml.kernel.org/r/20170217081742.17417-4-namhyung@kernel.org
[ Removed builtin-report.c verbose > 0 hunk added to the previous patch ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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| arch | ||
| block | ||
| certs | ||
| crypto | ||
| Documentation | ||
| drivers | ||
| firmware | ||
| fs | ||
| include | ||
| init | ||
| ipc | ||
| kernel | ||
| lib | ||
| mm | ||
| net | ||
| samples | ||
| scripts | ||
| security | ||
| sound | ||
| tools | ||
| usr | ||
| virt | ||
| .cocciconfig | ||
| .get_maintainer.ignore | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| COPYING | ||
| CREDITS | ||
| Kbuild | ||
| Kconfig | ||
| MAINTAINERS | ||
| Makefile | ||
| 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.