- 10 Oct, 2019 28 commits
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Jiri Olsa authored
Introduce the perf_evlist__filter_pollfd function and export it in the perf/evlist.h header, so that libperf users can check if the descriptor is still alive. Signed-off-by:
Jiri Olsa <jolsa@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Michael Petlan <mpetlan@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lore.kernel.org/lkml/20191007125344.14268-27-jolsa@kernel.orgSigned-off-by:
Arnaldo Carvalho de Melo <acme@redhat.com>
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Jiri Olsa authored
Add a static perf_evlist__purge() function to purge evsels from a evlist. Add also perf_evlist__for_each_entry_safe() which is used by perf_evlist__purge(). Signed-off-by:
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Jiri Olsa authored
Add the perf_evlist__exit() function, so far it's not exported and added only for internal use for perf and libperf. USe it to release cpus/threads and pollfd array. Signed-off-by:
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Jiri Olsa authored
It's needed in libperf only, so move it to the perf_evlist__mmap_ops() function. Signed-off-by:
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Jiri Olsa authored
Currently when a new map is mmapped we set its refcnt to 2 in the perf_evlist_mmap_ops::mmap callback. Every mmap gets its refcnt set to 2 when it's first mmaped: - 1 for the current user, which will be taken out by a call to perf_evlist__munmap_filtered(), where we find out there's no more data comming from kernel to this mmap. - 1 for the drain code where in perf_mmap__consume() the mmap is released if it is empty. Move this common setup into libperf's generic code before the mmap callback is called. Signed-off-by: -
Jiri Olsa authored
Switch to the libperf mmap interface by calling directly perf_evlist__mmap_ops() and removing perf's evlist__mmap_per_* functions. By switching to libperf perf_evlist__mmap() we need to operate over 'struct perf_mmap' in evlist__add_pollfd, so make the related changes there. Signed-off-by:
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Jiri Olsa authored
Add the perf_evlist__mmap_cb_mmap() function to call perf specific mmap__mmap() function during perf_evlist__mmap_ops() call. Signed-off-by:
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Jiri Olsa authored
Add the perf_evlist__mmap_cb_get() function to return 'struct perf_mmap' object during perf_evlist__mmap_ops() call. The array of 'struct mmap' is allocated via evlist__alloc_mmap(), in this callback we simply returns pointer to the base object. Signed-off-by:
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Jiri Olsa authored
Add perf_evlist__mmap_cb_idx function to call auxtrace_mmap_params__set_idx() on each new index during perf_evlist__mmap_ops call. Signed-off-by:
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Jiri Olsa authored
Add the perf_evlist_mmap_ops::mmap callback to be called in mmap_per_evsel() to actually mmap the map. Add libperf's perf_evlist__mmap_cb_mmap() function as libperf's mmap callback. New mmaped map gets refcount set to 2 in mmap__mmap(), we follow that in mmap callback. We will move this to common place after we switch to perf_evlist__mmap(). Signed-off-by:
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Jiri Olsa authored
Add the perf_evlist_mmap_ops::get callback to be called in mmap_per_evsel() to get/allocate the 'struct perf_mmap' object. Add the libperf's perf_evlist__mmap_cb_get() function as libperf's get callback. Signed-off-by:
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Jiri Olsa authored
Add the perf_evlist_mmap_ops::idx callback to be called in mmap_per_cpu() and mmap_per_thread() with current cpu and thread indexes. It's used by current aux code, so perf will use this callback to set the aux index. Signed-off-by:
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Jiri Olsa authored
To be able to pass specific callbacks to evlist's mmap. There will be a specific call to this function from perf's evlist__mmap() and libperf's perf_evlist__mmap() functions in following changes. Signed-off-by:
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Jiri Olsa authored
Add libperf's version of perf_evlist__mmap()/munmap() functions and exporting them in the perf/evlist.h header. It's the backbone of what we have in perf code. The following changes will add needed callbacks and then we'll finally switch the perf code to use libperf's version. Add mmap/mmap_ovw 'struct perf_mmap' object arrays to hold maps for libperf's evlist. Signed-off-by:
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Jiri Olsa authored
Move perf_mmap__read_event() from tools/perf to libperf and export it in the perf/mmap.h header. Signed-off-by:
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Jiri Olsa authored
Move perf_mmap__read_init() from tools/perf to libperf and export it in the perf/mmap.h header. Signed-off-by:
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Jiri Olsa authored
Move perf_mmap__read_init() from tools/perf to libperf and export it in perf/mmap.h header. And add pr_debug2()/pr_debug3() macros support, because the code is using them. Signed-off-by:
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Jiri Olsa authored
Move perf_mmap__consume() vrom tools/perf to libperf and export it in the perf/mmap.h header. Move also the needed helpers perf_mmap__write_tail(), perf_mmap__read_head() and perf_mmap__empty(). Signed-off-by:
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Jiri Olsa authored
We will move this code to libperf shortly, so we need to free it of 'struct auxtrace_mmap' usage, because it won't be available in libperf (for now). The perf_event_mmap_page::aux_size is set when the aux mmap is mapped, so the check is equivalent. Signed-off-by:
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Jiri Olsa authored
Move perf_mmap__put() from tools/perf to libperf. Once perf_mmap__put() is moved, we need a way to call application related unmap code (AIO and aux related code for eprf), when the map goes away. Add the perf_mmap::unmap callback to do that. The unmap path from perf is: perf_mmap__put (libperf) perf_mmap__munmap (libperf) map->unmap_cb -> perf_mmap__unmap_cb (perf) mmap__munmap (perf) Committer notes: Add missing linux/kernel.h to tools/perf/lib/mmap.c to get the BUG_ON definition. Signed-off-by: -
Jiri Olsa authored
Move perf_mmap__unmap() from tools/perf to libperf, to internal header internal/mmap.h. It will be used in the following patches. And rename the existing perf's function to mmap__munmap(). Signed-off-by:
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Jiri Olsa authored
Move perf_mmap__get() from tools/perf to libperf in the internal header internal/mmap.h. Signed-off-by:
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Jiri Olsa authored
Move perf_mmap__mmap() from tools/perf to libperf, it will be used in the following patches. And rename the existing perf's function to mmap__mmap(). Signed-off-by:
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Jiri Olsa authored
Move perf_mmap__mmap_len() from tools/perf wto libperf, it will be used in the following patches. And rename the existing perf's function to mmap__mmap_len(). Signed-off-by:
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Jiri Olsa authored
Add libperf's version of mmap params 'struct perf_mmap_param' object with the basics: 'prot' and 'mask'. Encapsulate it in the current 'struct mmap_params' object. Signed-off-by:
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Jiri Olsa authored
Add perf_mmap__init() function to initialize 'struct perf_mmap' objects. Add it to a new mmap.c source file, that will carry all the mmap related functions. Signed-off-by:
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John Garry authored
Will and I have an interest in reviewing the pmu-events changes related to arm64, so add a specific entry for this. Signed-off-by:
John Garry <john.garry@huawei.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Florian Fainelli <f.fainelli@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: linuxarm@huawei.com Cc: linux-arm-kernel@lists.infradead.org Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Shaokun Zhang <zhangshaokun@hisilicon.com> Cc: Will Deacon <will@kernel.org> Link: http://lore.kernel.org/lkml/1570611273-108281-1-git-send-email-john.garry@huawei.comSigned-off-by:
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Ian Rogers authored
Being const + weak breaks with some compilers that constant-propagate from the weak symbol. This behavior is outside of the specification, but in LLVM is chosen to match GCC's behavior. LLVM's implementation was set in this patch: https://github.com/llvm/llvm-project/commit/f49573d1eedcf1e44893d5a062ac1b72c8419646 A const + weak symbol is set to be weak_odr: https://llvm.org/docs/LangRef.html ODR is one definition rule, and given there is one constant definition constant-propagation is possible. It is possible to get this code to miscompile with LLVM when applying link time optimization. As compilers become more aggressive, this is likely to break in more instances. Move the definition of sample_reg_masks to the conditional part of perf_regs.h and guard usage with HAVE_PERF_REGS_SUPPORT. This avoids the weak symbol. Fix an issue when HAVE_PERF_REGS_SUPPORT isn't defined from patch v1. In v3, add perf_regs.c for architectures that HAVE_PERF_REGS_SUPPORT but don't declare sample_regs_masks. Further notes: Jiri asked: "Is this just a precaution or you actualy saw some breakage?" Ian answered: "We saw a breakage with clang with thinlto enabled for linking. Our compiler team had recently seen, and were surprised by, a similar issue and were able to dig out the weak ODR issue." Signed-off-by:
Ian Rogers <irogers@google.com> Reviewed-by:
Nick Desaulniers <ndesaulniers@google.com> Acked-by:
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- 09 Oct, 2019 12 commits
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Arnaldo Carvalho de Melo authored
Continuing from the previous cset comment, now that filter expression works: # perf trace -e msr:* --filter="msr!=FS_BASE && msr != IA32_TSC_DEADLINE && msr != 0x830 && msr != 0x83f && msr !=IA32_SPEC_CTRL" --filter-pids 3750 0.000 Timer/5033 msr:write_msr(msr: SYSCALL_MASK, val: 292608) 0.009 Timer/5033 msr:write_msr(msr: LSTAR, val: -1398800368) 0.010 Timer/5033 msr:write_msr(msr: TSC_AUX, val: 4) 0.050 :0/0 msr:read_msr(msr: IA32_TSC_ADJUST) 45.661 gnome-terminal/12595 msr:write_msr(msr: SYSCALL_MASK, val: 292608) 45.672 gnome-terminal/12595 msr:write_msr(msr: LSTAR, val: -1398800368) 45.675 gnome-terminal/12595 msr:write_msr(msr: TSC_AUX, val: 3) 54.852 :0/0 msr:read_msr(msr: IA32_TSC_ADJUST) 130.508 Timer/4050 msr:write_msr(msr: SYSCALL_MASK, val: 292608) 130.527 Timer/4050 msr:write_msr(msr: LSTAR, val: -1398800368) 130.531 Timer/4050 msr:write_msr(msr: TSC_AUX, val: 3) 140.924 :0/0 msr:read_msr(msr: IA32_TSC_ADJUST) 164.738 :0/0 msr:read_msr(msr: IA32_TSC_ADJUST) 603.578 :0/0 msr:read_msr(msr: IA32_TSC_ADJUST) 620.809 :0/0 msr:read_msr(msr: IA32_TSC_ADJUST) 690.115 JS Watchdog/4259 msr:write_msr(msr: SYSCALL_MASK, val: 292608) 690.136 JS Watchdog/4259 msr:write_msr(msr: LSTAR, val: -1398800368) 690.141 JS Watchdog/4259 msr:write_msr(msr: TSC_AUX, val: 3) 690.186 :0/0 msr:read_msr(msr: IA32_TSC_ADJUST) 759.016 :0/0 msr:read_msr(msr: IA32_TSC_ADJUST) ^C[root@quaco ~]# Or look at the first 3 write_msr events for that IA32_TSC_DEADLINE to learn why it happens so often: # perf trace --max-events=3 --max-stack=8 -e msr:* --filter="msr==IA32_TSC_DEADLINE" --filter-pids 3750 0.000 :0/0 msr:write_msr(msr: IA32_TSC_DEADLINE, val: 19296732550862) do_trace_write_msr ([kernel.kallsyms]) do_trace_write_msr ([kernel.kallsyms]) lapic_next_deadline ([kernel.kallsyms]) clockevents_program_event ([kernel.kallsyms]) hrtimer_interrupt ([kernel.kallsyms]) smp_apic_timer_interrupt ([kernel.kallsyms]) apic_timer_interrupt ([kernel.kallsyms]) cpuidle_enter_state ([kernel.kallsyms]) 32.646 :0/0 msr:write_msr(msr: IA32_TSC_DEADLINE, val: 19296800134158) do_trace_write_msr ([kernel.kallsyms]) do_trace_write_msr ([kernel.kallsyms]) lapic_next_deadline ([kernel.kallsyms]) clockevents_program_event ([kernel.kallsyms]) hrtimer_start_range_ns ([kernel.kallsyms]) tick_nohz_restart_sched_tick ([kernel.kallsyms]) tick_nohz_idle_exit ([kernel.kallsyms]) do_idle ([kernel.kallsyms]) 32.802 :0/0 msr:write_msr(msr: IA32_TSC_DEADLINE, val: 19297507436922) do_trace_write_msr ([kernel.kallsyms]) do_trace_write_msr ([kernel.kallsyms]) lapic_next_deadline ([kernel.kallsyms]) clockevents_program_event ([kernel.kallsyms]) hrtimer_try_to_cancel ([kernel.kallsyms]) hrtimer_cancel ([kernel.kallsyms]) tick_nohz_restart_sched_tick ([kernel.kallsyms]) tick_nohz_idle_exit ([kernel.kallsyms]) # And if some of the strings can't be found: # trace -e msr:* --filter="msr!=SPECULATIVE_EXECUTION_PROBLEMS_SOLUTION && msr != IA32_TSC_DEADLINE && msr != 0x830 && msr != 0x83f && msr !=IA32_SPEC_CTRL" --filter-pids 3750 "SPECULATIVE_EXECUTION_PROBLEMS_SOLUTION" not found for "msr" in "msr:read_msr", can't set filter "(msr!=SPECULATIVE_EXECUTION_PROBLEMS_SOLUTION && msr != IA32_TSC_DEADLINE && msr != 0x830 && msr != 0x83f && msr !=IA32_SPEC_CTRL) && (common_pid != 28131 && common_pid != 3750)" # Next step is to automatically wire up the pre-existing strarrays, which there are quite a few. The strtoul() methods will be further enhanced to allow for looking at other arguments in a syscall/tracepoint, just like going from integer to string (scnprintf methods), so that those "val" lines for the msr tracepoints can be properly formatted or even resolved into some string. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Brendan Gregg <brendan.d.gregg@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Luis Cláudio Gonçalves <lclaudio@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Link: https://lkml.kernel.org/n/tip-4qaai5iqjgefd11k4ddm7qg8@git.kernel.orgSigned-off-by: -
Arnaldo Carvalho de Melo authored
So that one can try things like: # perf trace -e msr:* --filter="msr!=FS_BASE && msr != IA32_TSC_DEADLINE && msr != 0x830 && msr != 0x83f && msr !=IA32_SPEC_CTRL" --filter-pids 3750 That, at this point in the patchset, without any strtoul in place for tracepoint arguments, will result in: No resolver (strtoul) for "msr" in "msr:read_msr", can't set filter "(msr!=FS_BASE && msr != IA32_TSC_DEADLINE && msr != 0x830 && msr != 0x83f && msr !=IA32_SPEC_CTRL) && (common_pid != 25407 && common_pid != 3750)" # See you in the next cset! Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Brendan Gregg <brendan.d.gregg@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Luis Cláudio Gonçalves <lclaudio@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Link: https://lkml.kernel.org/n/tip-dx5j70fv2rgkeezd1cb3hv2p@git.kernel.orgSigned-off-by:
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Arnaldo Carvalho de Melo authored
And also for 'struct strarray', since its needed to implement strarrays__strtoul(). This just traverses the entries and when finding a match, returns (offset + index), i.e. the value associated with the searched string. E.g. "EFER" (MSR_EFER) returns: # grep -w EFER -B2 /tmp/build/perf/trace/beauty/generated/x86_arch_MSRs_array.c #define x86_64_specific_MSRs_offset 0xc0000080 static const char *x86_64_specific_MSRs[] = { [0xc0000080 - x86_64_specific_MSRs_offset] = "EFER", # 0xc0000080 This will be auto-attached to 'struct syscall_arg_fmt' entries associated with strarrays as soon as we add a ->strarray and ->strarrays to 'struct syscall_arg_fmt'. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Brendan Gregg <brendan.d.gregg@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Luis Cláudio Gonçalves <lclaudio@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Link: https://lkml.kernel.org/n/tip-r2hpaahf8lishyb1owko9vs1@git.kernel.orgSigned-off-by: -
Arnaldo Carvalho de Melo authored
This will go from a string to a number, so that filter expressions can be constructed with strings and then, before applying the tracepoint filters (or eBPF, in the future) we can map those strings to numbers. The first one will be for 'msr' tracepoint arguments, but real quickly we will be able to reuse all strarrays for that. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Brendan Gregg <brendan.d.gregg@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Luis Cláudio Gonçalves <lclaudio@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Link: https://lkml.kernel.org/n/tip-wgqq48agcgr95b8dmn6fygtr@git.kernel.orgSigned-off-by:
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Arnaldo Carvalho de Melo authored
Similar to what is in 'perf record', works just like there: # perf trace -e msr:* 328.297 :0/0 msr:write_msr(msr: FS_BASE, val: 140240388381888) 328.302 :0/0 msr:write_msr(msr: FS_BASE, val: 140240388381888) 328.306 :0/0 msr:write_msr(msr: FS_BASE, val: 140240388381888) 328.317 :0/0 msr:write_msr(msr: FS_BASE, val: 140240388381888) 328.322 :0/0 msr:write_msr(msr: FS_BASE, val: 140240388381888) 328.327 :0/0 msr:write_msr(msr: FS_BASE, val: 140240388381888) 328.331 :0/0 msr:write_msr(msr: FS_BASE, val: 140240388381888) 328.336 :0/0 msr:write_msr(msr: FS_BASE, val: 140240388381888) 328.340 :0/0 ^Cmsr:write_msr(msr: FS_BASE, val: 140240388381888) # So, for a system wide trace session looking at the write_msr tracepoint we see a flood of MSR_FS_BASE, we need to get the number for that: # grep FS_BASE /tmp/build/perf/trace/beauty/generated/x86_arch_MSRs_array.c [0xc0000100 - x86_64_specific_MSRs_offset] = "FS_BASE", # And then use it in a filter: # perf trace -e msr:* --filter="msr!=0xc0000100" <SNIP> 942.177 :0/0 msr:write_msr(msr: IA32_TSC_DEADLINE, val: 3056931068232) 942.199 :0/0 msr:write_msr(msr: IA32_TSC_DEADLINE, val: 3057135655252) 942.203 :0/0 msr:write_msr(msr: IA32_TSC_DEADLINE, val: 3056931068222) 942.231 :0/0 msr:write_msr(msr: IA32_TSC_DEADLINE, val: 3056998373022) 942.241 :0/0 msr:write_msr(msr: IA32_TSC_DEADLINE, val: 3056931068236) <SNIP> # Ok, lets filter that too, too noisy: # grep TSC_DEADLINE /tmp/build/perf/trace/beauty/generated/x86_arch_MSRs_array.c [0x000006E0] = "IA32_TSC_DEADLINE", # # perf trace -e msr:* --filter="msr!=0xc0000100 && msr!=0x6e0" -a sleep 0.1 0.000 :0/0 msr:read_msr(msr: IA32_TSC_ADJUST) 0.066 CPU 0/KVM/4895 msr:write_msr(msr: IA32_SPEC_CTRL, val: 6) 0.070 CPU 0/KVM/4895 msr:write_msr(msr: 0x830, val: 34359740667) 0.099 CPU 0/KVM/4895 msr:read_msr(msr: IA32_SYSENTER_ESP, val: -2199021993472) 0.100 CPU 0/KVM/4895 msr:read_msr(msr: IA32_APICBASE, val: 4276096000) 0.101 CPU 0/KVM/4895 msr:read_msr(msr: IA32_DEBUGCTLMSR) 0.109 :0/0 msr:write_msr(msr: IA32_SPEC_CTRL) 1.000 :0/0 msr:write_msr(msr: 0x830, val: 17179871485) 18.893 :0/0 msr:write_msr(msr: 0x83f, val: 246) 28.810 :0/0 msr:write_msr(msr: 0x830, val: 68719479037) 40.117 CPU 0/KVM/4895 msr:write_msr(msr: IA32_SPEC_CTRL, val: 6) 40.127 CPU 0/KVM/4895 msr:read_msr(msr: IA32_DEBUGCTLMSR) 40.139 CPU 0/KVM/4895 msr:write_msr(msr: LSTAR, val: -2130661312) 40.141 CPU 0/KVM/4895 msr:write_msr(msr: SYSCALL_MASK, val: 14080) 40.142 CPU 0/KVM/4895 msr:write_msr(msr: TSC_AUX) 40.144 CPU 0/KVM/4895 msr:write_msr(msr: KERNEL_GS_BASE) 40.147 CPU 0/KVM/4895 msr:write_msr(msr: IA32_SPEC_CTRL) 40.148 CPU 0/KVM/4895 msr:write_msr(msr: IA32_FLUSH_CMD, val: 1) 40.151 CPU 0/KVM/4895 msr:write_msr(msr: IA32_SPEC_CTRL, val: 6) ^C # One can combine that with filtering pids as well: # perf trace -e msr:* --filter="msr!=0xc0000100 && msr!=0x6e0" --filter-pids 4895 -a sleep 0.09 0.000 :0/0 msr:write_msr(msr: 0x830, val: 4294969597) 0.291 gnome-terminal/2790 msr:write_msr(msr: SYSCALL_MASK, val: 292608) 0.294 gnome-terminal/2790 msr:write_msr(msr: LSTAR, val: -1935671280) 0.295 gnome-terminal/2790 msr:write_msr(msr: TSC_AUX, val: 6) 10.940 gnome-terminal/2790 msr:write_msr(msr: 0x830, val: 4294969597) 15.943 gnome-shell/2096 msr:write_msr(msr: 0x830, val: 4294969597) 16.975 :0/0 msr:write_msr(msr: 0x830, val: 4294969597) 19.560 :0/0 msr:write_msr(msr: 0x83f, val: 246) 25.162 :0/0 msr:read_msr(msr: IA32_TSC_ADJUST) 25.807 JS Watchdog/3635 msr:write_msr(msr: IA32_SPEC_CTRL, val: 6) 25.820 :0/0 msr:write_msr(msr: IA32_SPEC_CTRL) 25.941 gnome-terminal/2790 msr:write_msr(msr: 0x830, val: 4294969597) 26.941 gnome-terminal/2790 msr:write_msr(msr: 0x830, val: 4294969597) 29.942 gnome-terminal/2790 msr:write_msr(msr: 0x830, val: 4294969597) 45.313 :0/0 msr:write_msr(msr: 0x83f, val: 246) 56.945 gnome-terminal/2790 msr:write_msr(msr: 0x830, val: 4294969597) 60.946 gnome-terminal/2790 msr:write_msr(msr: 0x830, val: 4294969597) 74.096 JS Watchdog/8971 msr:write_msr(msr: IA32_SPEC_CTRL, val: 6) 74.130 :0/0 msr:write_msr(msr: IA32_SPEC_CTRL) 79.673 :0/0 msr:write_msr(msr: 0x83f, val: 246) 79.947 gnome-terminal/2790 msr:write_msr(msr: 0x830, val: 17179871485) # Or for just a pid, with callchains: # grep SYSCALL_MAS /tmp/build/perf/trace/beauty/generated/x86_arch_MSRs_array.c [0xc0000084 - x86_64_specific_MSRs_offset] = "SYSCALL_MASK", # perf trace -e msr:* --filter="msr==0xc0000084" --pid 2790 --call-graph=dwarf 0.000 gnome-terminal/2790 msr:write_msr(msr: SYSCALL_MASK, val: 292608) do_trace_write_msr ([kernel.kallsyms]) do_trace_write_msr ([kernel.kallsyms]) kvm_on_user_return ([kvm]) fire_user_return_notifiers ([kernel.kallsyms]) exit_to_usermode_loop ([kernel.kallsyms]) do_syscall_64 ([kernel.kallsyms]) entry_SYSCALL_64 ([kernel.kallsyms]) __GI___poll (inlined) 9299.073 gnome-terminal/2790 msr:write_msr(msr: SYSCALL_MASK, val: 292608) do_trace_write_msr ([kernel.kallsyms]) do_trace_write_msr ([kernel.kallsyms]) kvm_on_user_return ([kvm]) fire_user_return_notifiers ([kernel.kallsyms]) exit_to_usermode_loop ([kernel.kallsyms]) do_syscall_64 ([kernel.kallsyms]) entry_SYSCALL_64 ([kernel.kallsyms]) __GI___poll (inlined) 9348.374 gnome-terminal/2790 msr:write_msr(msr: SYSCALL_MASK, val: 292608) do_trace_write_msr ([kernel.kallsyms]) do_trace_write_msr ([kernel.kallsyms]) kvm_on_user_return ([kvm]) fire_user_return_notifiers ([kernel.kallsyms]) exit_to_usermode_loop ([kernel.kallsyms]) do_syscall_64 ([kernel.kallsyms]) entry_SYSCALL_64 ([kernel.kallsyms]) __GI___poll (inlined) <SNIP> # Ok, just another form of KVM to emit MSRs :-) Next step: elliminate those greps by getting the filter expression, looking for arg names, then for the arrays associated with it to do a reverse lookup. Also allow those filters to be associated with strace-like syscall names. After that: augment the 'val' arg for 'msr:write_msr' based on the first arg, 'msr'. Then, do that with eBPF too, not just with tracepoint filters. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Brendan Gregg <brendan.d.gregg@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Luis Cláudio Gonçalves <lclaudio@redhat.com> Cc: Marcelo Tosatti <mtosatti@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Link: https://lkml.kernel.org/n/tip-95bfe5d4tzy5f66bx49d05rj@git.kernel.orgSigned-off-by: -
Arnaldo Carvalho de Melo authored
We'll need this to support 'perf trace e tracepoint --filter=expr', as the command line tracepoint filter is attache to the preceding evsel, just like in 'perf record' and when we go to set pid filters, which we do at the minimum to filter 'perf trace' own syscalls, we need to append, not set the tp filter. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Luis Cláudio Gonçalves <lclaudio@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Link: https://lkml.kernel.org/n/tip-daynpknni44ywuzi8iua57nn@git.kernel.orgSigned-off-by:
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Arnaldo Carvalho de Melo authored
Will be used by 'perf trace' to support 'perf trace --filter', we need to append to any pre-existing filter. When parse_filter() gets invoked to process --filter, it'll set the filter to that specified on the command line, later on, when we filter out 'perf trace' own pid to avoid an event feedback loop, we need to preserve the command line filter put in place by parse_filter(). Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Luis Cláudio Gonçalves <lclaudio@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Link: https://lkml.kernel.org/n/tip-h9rot08qmxlnfmte0holt68x@git.kernel.orgSigned-off-by:
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Arnaldo Carvalho de Melo authored
Will be used to append such lists to existing filters. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Luis Cláudio Gonçalves <lclaudio@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Link: https://lkml.kernel.org/n/tip-798vlyqfqw938ehoe8etivx1@git.kernel.orgSigned-off-by:
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Arnaldo Carvalho de Melo authored
So that we can go from: # perf trace -e msr:write_msr --max-stack=16 sleep 1 0.000 sleep/6740 msr:write_msr(msr: 3221225728, val: 139636317451648) do_trace_write_msr ([kernel.kallsyms]) do_trace_write_msr ([kernel.kallsyms]) do_arch_prctl_64 ([kernel.kallsyms]) __x64_sys_arch_prctl ([kernel.kallsyms]) do_syscall_64 ([kernel.kallsyms]) entry_SYSCALL_64 ([kernel.kallsyms]) init_tls (/usr/lib64/ld-2.29.so) dl_main (/usr/lib64/ld-2.29.so) _dl_sysdep_start (/usr/lib64/ld-2.29.so) _dl_start (/usr/lib64/ld-2.29.so) # To: # perf trace -e msr:write_msr --max-stack=16 sleep 1 0.000 sleep/8519 msr:write_msr(msr: FS_BASE, val: 139878031705472) do_trace_write_msr ([kernel.kallsyms]) do_trace_write_msr ([kernel.kallsyms]) do_arch_prctl_64 ([kernel.kallsyms]) __x64_sys_arch_prctl ([kernel.kallsyms]) do_syscall_64 ([kernel.kallsyms]) entry_SYSCALL_64 ([kernel.kallsyms]) init_tls (/usr/lib64/ld-2.29.so) dl_main (/usr/lib64/ld-2.29.so) _dl_sysdep_start (/usr/lib64/ld-2.29.so) _dl_start (/usr/lib64/ld-2.29.so) # This, in reverse, will allow for symbolic system call/tracepoint filtering. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Brendan Gregg <brendan.d.gregg@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Luis Cláudio Gonçalves <lclaudio@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Link: https://lkml.kernel.org/n/tip-q1q4unmqja5ex7dy0kb5cjaa@git.kernel.orgSigned-off-by: -
Arnaldo Carvalho de Melo authored
We need to wrap those autogenerated string arrays with the strarrays__scnprintf() formatter, do it. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Brendan Gregg <brendan.d.gregg@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Luis Cláudio Gonçalves <lclaudio@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Link: https://lkml.kernel.org/n/tip-wqjz4kwi4a0ot6lsis3kc65j@git.kernel.orgSigned-off-by:
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Arnaldo Carvalho de Melo authored
For instance 'msr' appears in several tracepoints, so we can associate it with a single scnprintf() routine auto-generated from kernel headers, as will be done in followup patches. Start with an empty array of associations. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Link: https://lkml.kernel.org/n/tip-89ptht6s5fez82lykuwq1eyb@git.kernel.orgSigned-off-by:
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Arnaldo Carvalho de Melo authored
This way we generate the source with the table for later use by plugins, etc. I.e. after running: $ make -C tools/perf O=/tmp/build/perf We end up with: $ head /tmp/build/perf/trace/beauty/generated/x86_arch_MSRs_array.c static const char *x86_MSRs[] = { [0x00000000] = "IA32_P5_MC_ADDR", [0x00000001] = "IA32_P5_MC_TYPE", [0x00000010] = "IA32_TSC", [0x00000017] = "IA32_PLATFORM_ID", [0x0000001b] = "IA32_APICBASE", [0x00000020] = "KNC_PERFCTR0", [0x00000021] = "KNC_PERFCTR1", [0x00000028] = "KNC_EVNTSEL0", [0x00000029] = "KNC_EVNTSEL1", $ Now its just a matter of using it, first in a libtracevent plugin. At some point we should move tools/perf/trace/beauty to tools/beauty/, so that it can be used more generally and even made available externally like libbpf, libperf, libtraevent, etc. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Brendan Gregg <brendan.d.gregg@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Luis Cláudio Gonçalves <lclaudio@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Link: https://lkml.kernel.org/n/tip-b3rmutg4igcohx6kpo67qh4j@git.kernel.orgSigned-off-by:
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