- 25 Jan, 2018 16 commits
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Tor Jeremiassen authored
The auxtrace_info section contains metadata that describes the number of trace capable CPUs, their ETM version and trace configuration, including trace id values. This information is required by the trace decoder in order to properly decode the compressed trace packets. This patch adds code to read and parse this metadata, and store it for use in configuring instances of the cs-etm trace decoder. Co-authored-by:
Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by:
Tor Jeremiassen <tor@ti.com> Acked-by:
Jiri Olsa <jolsa@redhat.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Kim Phillips <kim.phillips@arm.com> Cc: Mike Leach <mike.leach@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Suzuki Poulouse <suzuki.poulose@arm.com> Cc: linux-arm-kernel@lists.infradead.org Link: http://lkml.kernel.org/r/1516211539-5166-4-git-send-email-mathieu.poirier@linaro.orgSigned-off-by:
Arnaldo Carvalho de Melo <acme@redhat.com>
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Mathieu Poirier authored
This patch adds the entry point for CoreSight trace decoding, serving as a jumping board for furhter expansions. Co-authored-by:
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Mathieu Poirier authored
The Open CoreSight Decoding Library (openCSD) is a free and open library to decode traces collected by the CoreSight hardware infrastructure. This patch adds the required mechanic to recognise the presence of the openCSD library on a system and set up miscellaneous flags to be used in the compilation of the trace decoding feature. Signed-off-by:
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Andi Kleen authored
Signed-off-by:
Andi Kleen <ak@linux.intel.com> Link: https://lkml.kernel.org/r/20180118234518.GA27753@tassilo.jf.intel.comSigned-off-by:
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Andi Kleen authored
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Andi Kleen authored
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Andi Kleen authored
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Andi Kleen authored
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Andi Kleen authored
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Andi Kleen authored
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Andi Kleen authored
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Andi Kleen authored
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Andi Kleen authored
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Andi Kleen authored
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Andi Kleen authored
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Andi Kleen authored
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- 23 Jan, 2018 9 commits
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Hendrik Brueckner authored
Change the Makefile and build process to no longer require audit-libs interfaces when the architecture provides system call tables. Committer notes: Its not enough to hook into the NO_LIBAUDIT makefile block, we need to define a CONFIG_TRACE that gets selected by both architectures generating the syscall tables from the kernel headers and from detecting the availability of libaudit. With that in place we will not link against libaudit even if the necessary files are available for that, in fact we will not even try to detect its availability, speeding up a bit the feature detection phase. Signed-off-by:
Hendrik Brueckner <brueckner@linux.vnet.ibm.com> Reviewed-by:
Thomas Richter <tmricht@linux.vnet.ibm.com> Tested-by:
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Hendrik Brueckner authored
Replace the errno_to_name() from the audit-libs with the newly introduced arch_syscalls__strerrno() function. With this change: 1. With replacing errno_to_name() from audit-libs, perf trace does no longer require audit-lib interfaces. 2. In addition to 1, the audit-libs dependency can be removed for architectures that support syscall tables in perf. This is achieved in a follow-up commit. 3. With the architecture specific errno number/name mapping, perf trace reports can work across architectures. Signed-off-by: -
Hendrik Brueckner authored
Introduce a script that generates a mapping of errno numbers to their names for each architecture that is supported by perf (i.e. has a subdirectory in tools/perf/arch/). The errno mapping is generated as part of the trace beautifiers and can be used by including the trace/beauty/arch_errno_names.c file. Then, use arch_syscalls__strerrno() to look up an errno value to obtain the errno name (e.g. ENOENT) for a particular architecture. Signed-off-by:
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Hendrik Brueckner authored
This is a pre-req to generate an architecture specific mapping of errno numbers to their names. This errno mapping can be used by perf trace to support cross-architecture trace reports and to get rid of the audit-libs dependency. Signed-off-by:
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Hendrik Brueckner authored
For each arch in tools/perf/arch, grab a copy of errno.h. This is a pre-req to generate an architecture specific mapping of errno numbers to their names. This errno mapping can be used by perf trace to support cross-architecture trace reports and to get rid of the audit-libs dependency. Signed-off-by:
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Jiri Olsa authored
Display the state of the rest of the features (FEATURE_TESTS_EXTRA) on a 'make VF=1' build. These features are detected manually by perf's Makefile.config so they can't be displayed with the main list, but only after we're done in Makefile.config. $ make VF=1 BUILD: Doing 'make -j4' parallel build Auto-detecting system features: ... dwarf: [ on ] ... dwarf_getlocations: [ on ] ... glibc: [ on ] ... gtk2: [ on ] SNIP ... timerfd: [ on ] ... sched_getcpu: [ on ] ... sdt: [ on ] ... setns: [ on ] extra features: ... bionic: [ OFF ] ... compile-32: [ on ] ... compile-x32: [ OFF ] ... cplus-demangle: [ on ] ... hello: [ OFF ] ... libbabeltrace: [ on ] ... liberty: [ on ] ... liberty-z: [ on ] ... libunwind-debug-frame: [ OFF ] ... libunwind-debug-frame-arm: [ OFF ] ... libunwind-debug-frame-aarch64: [ OFF ] SNIP Signed-off-by:Jiri Olsa <jolsa@kernel.org> Tested-by:
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Mathieu Poirier authored
Commit (93d10af2 perf tools: Optimize sample parsing for ordered events) breaks intelPT trace decoding by invariably returning an error if the event type isn't a PERF_SAMPLE_TIME. With this patch the timestamp is initialised and processing is allowed to continue if the error returned by function perf_evlist__parse_sample_timestamp() is not a fault. Signed-off-by:
Adrian Hunter <adrian.hunter@intel.com> Acked-by:
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Wang YanQing authored
I've meet a strange behavior with these commands on my gentoo box: 1: perf kmem record 2: CTRL-C to stop 1 3: perf report 4: "Enter", "Enter", "Run scripts for all samples", "event_analyzing_sample". Then 'perf report' says: " No kallsyms or vmlinux with build-id xxxx was found /lib/modules/4.10.0+/build/vmlinux with build id xxxx not found, continuing without symbols ". It is strange because I am sure /lib/modules/4.10.0+/build/vmlinux is right for perf.data. After digging, I found out the reason is that "perf report" generates many open fds, then "script_browse" uses popen to run "perf script" which run out of open files. The gentoo box has a small default value for "max open files", 1024. Yes, "ulimit -n " with a bigger number could fix it, but I think that using O_CLOEXEC in do_open is a better way. Signed-off-by:
Wang YanQing <udknight@gmail.com> Acked-by:
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Arnaldo Carvalho de Melo authored
To be more generally available and get the build on centos:5 to work after we use O_CLOEXEC in the next patch, in the util/dso.c file. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Cc: Wang YanQing <udknight@gmail.com> Link: https://lkml.kernel.org/n/tip-vsjbiydh15pfqomxw1kx64ex@git.kernel.orgSigned-off-by:
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- 18 Jan, 2018 5 commits
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Arnaldo Carvalho de Melo authored
When clang is not linked with 'perf' we should just add a debug message about that before doing the fallback to calling the external compiler. I.e. just the "-95" warning below gets turned into a debug message: # cat sys_enter_open.c #include "bpf.h" SEC("syscalls:sys_enter_open") int func(void *ctx) { struct { char *ptr; char path[256]; } filename = { .ptr = *((char **)(ctx + 16)), }; int len = bpf_probe_read_str(filename.path, sizeof(filename.path), filename.ptr); if (len > 0) { if (len == 1) perf_event_output(ctx, &__bpf_stdout__, BPF_F_CURRENT_CPU, &filename, len + sizeof(filename.ptr)); else if (len < 256) perf_event_output(ctx, &__bpf_stdout__, BPF_F_CURRENT_CPU, &filename, len + sizeof(filename.ptr)); } return 0; } # trace -e open,sys_enter_open.c bpf: builtin compilation failed: -95, try external compiler 0.000 ( ): __bpf_stdout__:@......./proc/self/task/11160/comm..) 0.014 ( 0.116 ms): qemu-system-x8/6721 open(filename: /proc/self/task/11160/comm, flags: RDWR) = 91 2335.411 ( ): __bpf_stdout__:FB..~.../etc/resolv.conf....) 2335.421 ( 0.030 ms): chronyd/883 open(filename: /etc/resolv.conf, flags: CLOEXEC) = 5 ^C# Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: https://lkml.kernel.org/n/tip-z5aak9oay448ffj37giz94yr@git.kernel.orgSigned-off-by: -
Arnaldo Carvalho de Melo authored
So that we can get it working for TUI, where using just pr_err() would end up making the message emitted to stderr to be erased by the TUI exit routine restoring the terminal to its previous state. Now we can see that trying to use a tracepoint field as one of the --field entries isn't working: # perf top --stdio --no-children -e syscalls:sys_enter_write --fields pid,sym,count Error: Unknown --fields key: `count' Usage: perf top [<options>] --fields <key[,keys...]> output field(s): overhead, period, sample plus all of sort keys # Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: https://lkml.kernel.org/n/tip-usy9hhy7umdd4bbblkn63t8w@git.kernel.orgSigned-off-by: -
Adrian Hunter authored
There is never a need to synthesize a 'swapped' sample, so all callers to perf_event__synthesize_sample() pass 'false' as the value to 'swapped'. So get rid of the unused 'swapped' parameter. Signed-off-by:
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Adrian Hunter authored
PERF_SAMPLE_CPU contains the cpu number in the first 4 bytes and the second 4 bytes are reserved. Ensure the reserved bytes are zero in perf_event__synthesize_sample(). Signed-off-by:
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Adrian Hunter authored
Both 'perf inject' and internal tools consume cpu endian samples, so there is never a need to do any swapping when synthesizing samples. Signed-off-by:
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- 17 Jan, 2018 10 commits
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Ingo Molnar authored
Merge tag 'perf-core-for-mingo-4.16-20180117' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core Pull perf/core improvements and fixes from Arnaldo Carvalho de Melo: - Fix various per event 'max-stack' and 'call-graph=dwarf' issues, mostly in 'perf trace', allowing to use 'perf trace --call-graph' with 'dwarf' and 'fp' to setup the callgraph details for the syscall events and make that apply to other events, whilhe allowing to override that on a per-event basis, using '-e sched:*switch/call-graph=dwarf/' for instance (Arnaldo Carvalho de Melo) - Improve the --time percent support in record/report/script (Jin Yao) - Fix copyfile_offset update of output offset (Jiri Olsa) - Add python script to profile and resolve physical mem type (Kan Liang) - Add ARM Statistical Profiling Extensions (SPE) support (Kim Phillips) - Remove trailing semicolon in the evlist code (Luis de Bethencourt) - Fix incorrect handling of type _TERM_DRV_CFG (Mathieu Poirier) - Use asprintf when possible in libtraceevent (Federico Vaga) - Fix bad force_token escape sequence in libtraceevent (Michael Sartain) - Add UL suffix to MISSING_EVENTS in libtraceevent (Michael Sartain) - value of unknown symbolic fields in libtraceevent (Jan Kiszka) - libtraceevent updates: (Steven Rostedt) o Show value of flags that have not been parsed o Simplify pointer print logic and fix %pF o Handle new pointer processing of bprint strings o Show contents (in hex) of data of unrecognized type records o Fix get_field_str() for dynamic strings - Add missing break in FALSE case of pevent_filter_clear_trivial() (Taeung Song) - Fix failed memory allocation for get_cpuid_str (Thomas Richter) Signed-off-by:
Ingo Molnar <mingo@kernel.org>
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Ingo Molnar authored
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Thomas Richter authored
In x86 architecture dependend part function get_cpuid_str() mallocs a 128 byte buffer, but does not check if the memory allocation succeeded or not. When the memory allocation fails, function __get_cpuid() is called with first parameter being a NULL pointer. However this function references its first parameter and operates on a NULL pointer which might cause core dumps. Signed-off-by:
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Jin Yao authored
Previously it was only allowed to use at most 10 time slices in 'perf script --time'. This patch removes this limitation. For example, following command line is OK (12 time slices) perf script --time 1%/1,1%/2,1%/3,1%/4,1%/5,1%/6,1%/7,1%/8,1%/9,1%/10,1%/11,1%/12 Signed-off-by:
Jin Yao <yao.jin@linux.intel.com> Suggested-by:
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Jin Yao authored
Previously it was only allowed to use at most 10 time slices in 'perf report --time'. This patch removes this limitation. For example, following command line is OK (12 time slices) perf report --stdio --time 1%/1,1%/2,1%/3,1%/4,1%/5,1%/6,1%/7,1%/8,1%/9,1%/10,1%/11,1%/12 Signed-off-by:
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Jin Yao authored
Previously we use a magic number 10 to limit the number of time slices. It's not very good. This patch creates a new function perf_time__range_alloc() to allocate time slices buffer. The number of buffer entries is determined by the number of comma in string but at least it will allocate one entry even if no comma is found. Signed-off-by:
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Jin Yao authored
Add a time slices indication to the perf report header. For example, # perf report --stdio --time 10% # Total Lost Samples: 0 # # Samples: 9K of event 'cycles:ppp' (time slices: 10%) # Event count (approx.): 8951288803 Signed-off-by:
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Jin Yao authored
Previously, the time percent slice needs an index to specify which one the user wants. It may be easier to use if the index can be omitted. So with this patch, for example, perf report --stdio --time 10%/1 should be equivalent to perf report --stdio --time 10% Signed-off-by:
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Jin Yao authored
The command line like 'perf report --stdio --time 1abc%/1' could be accepted by perf. It looks not very good. This patch uses strtod() to replace original atof() and check the entire string. Now for the same command line, it would return error message "Invalid time string". root@skl:/tmp# perf report --stdio --time 1abc%/1 Invalid time string Signed-off-by:
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Jin Yao authored
The following message will be returned to user when executing 'perf script --time' if perf data file doesn't contain the first/last sample time. "HINT: no first/last sample time found in perf data. Please use latest perf binary to execute 'perf record' (if '--buildid-all' is enabled, needs to set '--timestamp-boundary')." Signed-off-by:
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