Messages in this thread | | | Date | Wed, 2 Mar 2016 11:25:56 -0300 | From | Arnaldo Carvalho de Melo <> | Subject | Re: [RFC 4/4] perf kvm: Fix output fields instead of 'trace' for perf kvm report on powerpc |
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Em Wed, Feb 24, 2016 at 02:37:45PM +0530, Ravi Bangoria escreveu: > commit d49dadea7862 ("perf tools: Make 'trace' or 'trace_fields' sort key > default for tracepoint events") makes 'trace' sort key as a default > while displaying report for tracepoint. > > Because tracepoint(kvm_hv:kvm_guest_exit) is used as a default event, > perf kvm report will display output as a list of tracepoint hits and > not with a normal report columns. > > This patch will replace 'trace' field with 'overhead,comm,dso,sym' while > displaying perf kvm report of powerpc. > > Before applying patch: > > $ ./perf kvm --guestkallsyms=guest.kallsyms --guestmodules=guest.modules report --stdio > # To display the perf.data header info, please use --header/--header-only options. > # > # > # Total Lost Samples: 0 > # > # Samples: 181K of event 'kvm_hv:kvm_guest_exit' > # Event count (approx.): 181061 > # > # Overhead Trace output > # ........ ................................................................................. > # > 0.02% VCPU 8: trap=HV_DECREMENTER pc=0xc000000000091924 msr=0x8000000000009032, ceded=0 > 0.00% VCPU 0: trap=HV_DECREMENTER pc=0xc000000000091924 msr=0x8000000000009032, ceded=0 > 0.00% VCPU 8: trap=HV_DECREMENTER pc=0x10005c7c msr=0x800000000280f032, ceded=0 > 0.00% VCPU 8: trap=HV_DECREMENTER pc=0x1001ef14 msr=0x800000000280f032, ceded=0 > 0.00% VCPU 8: trap=HV_DECREMENTER pc=0x3fff83398830 msr=0x800000000280f032, ceded=0 > 0.00% VCPU 8: trap=HV_DECREMENTER pc=0x3fff833a6fe4 msr=0x800000000280f032, ceded=0 > 0.00% VCPU 8: trap=HV_DECREMENTER pc=0x3fff833a7a64 msr=0x800000000280f032, ceded=0 > > After applying patch: > > $ ./perf kvm --guestkallsyms=guest.kallsyms --guestmodules=guest.modules report --stdio > # To display the perf.data header info, please use --header/--header-only options. > # > # > # Total Lost Samples: 0 > # > # Samples: 181K of event 'kvm_hv:kvm_guest_exit' > # Event count (approx.): 181061 > # > # Overhead Command Shared Object Symbol > # ........ ....... ....................... .............................. > # > 0.02% :57276 [guest.kernel.kallsyms] [g] .plpar_hcall_norets > 0.00% :57274 [guest.kernel.kallsyms] [g] .plpar_hcall_norets > 0.00% :57276 [guest.kernel.kallsyms] [g] .__copy_tofrom_user_power7 > 0.00% :57276 [guest.kernel.kallsyms] [g] ._atomic_dec_and_lock > 0.00% :57276 [guest.kernel.kallsyms] [g] ._raw_spin_lock > 0.00% :57276 [guest.kernel.kallsyms] [g] ._switch > 0.00% :57276 [guest.kernel.kallsyms] [g] .bio_add_page > 0.00% :57276 [guest.kernel.kallsyms] [g] .kmem_cache_alloc > > Signed-off-by: Ravi Bangoria <ravi.bangoria@linux.vnet.ibm.com> > --- > tools/perf/builtin-report.c | 5 +++++ > 1 file changed, 5 insertions(+) > > diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c > index 31ec4ba..5d96882 100644 > --- a/tools/perf/builtin-report.c > +++ b/tools/perf/builtin-report.c > @@ -930,6 +930,11 @@ repeat: > else > use_browser = 0; > > + if (!field_order && > + is_perf_data_reorded_on_ppc(session->evlist) && > + perf_guest_only()) > + field_order = "overhead,comm,dso,sym"; > +
Can you please do it as:
__weak void arch__override_field_order(struct perf_evlist *evlist, const char **field_order) { }
This way we don't see any arch specific stuff in the tool, also I haven't seen any doc update, are you sure nothing needs to be added to tools/perf/Documentaton/ for any of these patches?
I think this needs to be documented further, probably in tools/perf/design.txt too?
> if (setup_sorting(session->evlist) < 0) { > if (sort_order) > parse_options_usage(report_usage, options, "s", 1); > -- > 2.1.4
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