Re: [GIT PULL 00/66] perf/core improvements and fixes

[Ingo Molnar]

* Arnaldo Carvalho de Melo <acme@xxxxxxxxxx> wrote:

> Hi Ingo,
> 
> 	Please consider pulling, several more patches in my queue pending
> review, this branch now builds in all of these systems, with Alpine Linux, that
> uses different versions of libelf, libc helping in keeping this codebase
> portable, soon I'll add containers for the Android SDK and Yocto:
> 
>   # perf stat dm
>   alpine:3.4: Ok
>   centos:5: Ok
>   centos:6: Ok
>   centos:7: Ok
>   debian:7: Ok
>   debian:8: Ok
>   debian:experimental: Ok
>   fedora:21: Ok
>   fedora:22: Ok
>   fedora:23: Ok
>   fedora:24: Ok
>   fedora:rawhide: Ok
>   mageia:5: Ok
>   opensuse:13.2: Ok
>   opensuse:42.1: Ok
>   ubuntu:12.04.5: Ok
>   ubuntu:14.04.4: Ok
>   ubuntu:15.10: Ok
>   ubuntu:16.04: Ok
> 
>    Performance counter stats for 'dm':
> 
>        1734.724897      task-clock (msec)         #    0.003 CPUs utilized          
>             70,156      context-switches          #    0.040 M/sec                  
>              7,182      cpu-migrations            #    0.004 M/sec                  
>             51,490      page-faults               #    0.030 M/sec                  
>      5,093,434,618      cycles                    #    2.936 GHz                    
>      4,839,787,241      instructions              #    0.95  insn per cycle         
>        898,488,442      branches                  #  517.943 M/sec                  
>         16,155,791      branch-misses             #    1.80% of all branches        
> 
>      684.926493347 seconds time elapsed
>   #
> 
> - Arnaldo
> 
> The following changes since commit 44530d588e142a96cf0cd345a7cb8911c4f88720:
> 
>   Revert "perf/x86/intel, watchdog: Switch NMI watchdog to ref cycles on x86" (2016-07-10 20:58:36 +0200)
> 
> are available in the git repository at:
> 
>   git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux.git tags/perf-core-for-mingo-20160712
> 
> for you to fetch changes up to 6d248fbda59c51ef5f2e90e11551d9e17aeb226f:
> 
>   tools lib traceevent: Add filter on task CPU id (2016-07-12 16:27:39 -0300)
> 
> ----------------------------------------------------------------
> perf/core improvements and fixes:
> 
> User visible:
> 
> - Add demangling of symbols in programs written in the Rust language (David Tolnay)
> 
> - Add support for tracepoints in the python binding, including an example, that
>   sets up and parses sched:sched_switch events, tools/perf/python/tracepoint.py
>   (Jiri Olsa)
> 
> - Introduce --stdio-color to setup the color output mode selection in
>   'annotate' and 'report', allowing emit color escape sequences when
>   redirecting the output of these tools (Arnaldo Carvalho de Melo)
> 
> Infrastructure:
> 
> - Various tweaks to allow the 'perf trace' beautifiers to build without using
>   kernel headers and in a wider range of Linux distributions/releases (Arnaldo Carvalho de Melo)
> 
> - Stop using kernel source files, instead copy what is needed and
>   check when the original kernel source file gets modified, warning
>   the developers about it. This helps in building the tool in older
>   systems and even in recent ones, for just added kernel features
>   for which ABI details (struct changes, defines, etc) still are not
>   available on system headers (Arnaldo Carvalho de Melo)
> 
> - Be consistent in how to use strerror_r, adding a wrapper that makes sure that
>   it returns a pointer to passed buffer, and using the XSI variant, that is
>   available in more libc implementations (Arnaldo Carvalho de Melo)
> 
> - Avoid checking code drift on busibox's diff perf intel-pt-decoder, as it
>   doesn't have the '-I' command line switch to check for regexps (Arnaldo Carvalho de Melo)
> 
> - Add missing headers in various places (Arnaldo Carvalho de Melo)
> 
> - Remove unneeded headers from various other places (Arnaldo Carvalho de Melo)
> 
> - Add feature detection for gelf_getnote(), disabling SDT support if not
>   present (Arnaldo Carvalho de Melo)
> 
> - Fix oddities with gcc 5.3.0 by initializing some variables (Arnaldo Carvalho de Melo)
> 
> - With those changes in place perf now builds on Alpine Linux 3.4, in addition to
>   on centos (5, 6, 7), debian (7, 8, experimental), fedora (21, 22, 23, 24, rawhide),
>   mageia 5, opensuse (13.2, 42.1) and ubuntu (12.04.5, 14.04.4, 15.10, 16.04) and
>   will be test build on those systems prior to future pull requests.

That's really impressive build coverage!

Pulled, thanks a lot Arnaldo!

	Ingo