linux-kernel - Re: [PATCH 12/12] perf script: Add --show-all-events option

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Date:   Wed, 22 May 2019 23:30:26 +0200
From:   Jiri Olsa <jolsa@...hat.com>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:     Jiri Olsa <jolsa@...nel.org>, lkml <linux-kernel@...r.kernel.org>,
        Ingo Molnar <mingo@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>,
        Stanislav Fomichev <sdf@...ichev.me>,
        Song Liu <songliubraving@...com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Andi Kleen <ak@...ux.intel.com>,
        Thomas Richter <tmricht@...ux.ibm.com>
Subject: Re: [PATCH 12/12] perf script: Add --show-all-events option

On Wed, May 22, 2019 at 01:18:04PM -0300, Arnaldo Carvalho de Melo wrote:
> Em Wed, May 08, 2019 at 03:20:10PM +0200, Jiri Olsa escreveu:
> > Adding --show-all-events option to show all
> > side-bad events with single option, like:
> > 
> >   $ perf script --show-all-events
> >   swapper     0 [000]     0.000000: PERF_RECORD_MMAP -1/0: [0xffffffffa6000000(0xc00e41) @ 0xffffffffa6000000]: x [kernel.kallsyms]_text
> >   ...
> >   swapper     0 [000]     0.000000: PERF_RECORD_KSYMBOL addr ffffffffc01bc362 len 229 type 1 flags 0x0 name bpf_prog_7be49e3934a125ba
> >   swapper     0 [000]     0.000000: PERF_RECORD_BPF_EVENT type 1, flags 0, id 29
> >   ...
> >   swapper     0 [000]     0.000000: PERF_RECORD_FORK(1:1):(0:0)
> >   systemd     0 [000]     0.000000: PERF_RECORD_COMM: systemd:1/1
> >   ...
> >   swapper     0 [000] 63587.039518:          1 cycles:  ffffffffa60698b4 [unknown] ([kernel.kallsyms])
> >   swapper     0 [000] 63587.039522:          1 cycles:  ffffffffa60698b4 [unknown] ([kernel.kallsyms])
> 
> Strange:
> 
> [root@...co pt]# 
> [root@...co pt]# perf evlist -v
> intel_pt//ku: type: 8, size: 112, config: 0x300e601, { sample_period, sample_freq }: 1, sample_type: IP|TID|TIME|CPU|IDENTIFIER, read_format: ID, disabled: 1, inherit: 1, exclude_hv: 1, sample_id_all: 1
> dummy:u: type: 1, size: 112, config: 0x9, { sample_period, sample_freq }: 1, sample_type: IP|TID|TIME|CPU|IDENTIFIER, read_format: ID, inherit: 1, exclude_kernel: 1, exclude_hv: 1, mmap: 1, comm: 1, task: 1, sample_id_all: 1, mmap2: 1, comm_exec: 1, context_switch: 1, ksymbol: 1, bpf_event: 1
> [root@...co pt]# 
> 
> Then:
> 
> [root@...co pt]# perf script --show-bpf-events  | head
>     0 PERF_RECORD_KSYMBOL addr ffffffffc029a6c3 len 229 type 1 flags 0x0 name bpf_prog_7be49e3934a125ba
>     0 PERF_RECORD_BPF_EVENT type 1, flags 0, id 47
>     0 PERF_RECORD_KSYMBOL addr ffffffffc029c1ae len 229 type 1 flags 0x0 name bpf_prog_2a142ef67aaad174
>     0 PERF_RECORD_BPF_EVENT type 1, flags 0, id 48
>     0 PERF_RECORD_KSYMBOL addr ffffffffc02ddd1c len 229 type 1 flags 0x0 name bpf_prog_7be49e3934a125ba
>     0 PERF_RECORD_BPF_EVENT type 1, flags 0, id 49
>     0 PERF_RECORD_KSYMBOL addr ffffffffc02dfc11 len 229 type 1 flags 0x0 name bpf_prog_2a142ef67aaad174
>     0 PERF_RECORD_BPF_EVENT type 1, flags 0, id 50
>     0 PERF_RECORD_KSYMBOL addr ffffffffc045da0a len 229 type 1 flags 0x0 name bpf_prog_7be49e3934a125ba
>     0 PERF_RECORD_BPF_EVENT type 1, flags 0, id 51
> [root@...co pt]#
> 
> But:
> 
> [root@...co pt]# perf script --show-all-events  | head
> Intel Processor Trace requires ordered events
> 0x2a0 [0x60]: failed to process type: 1 [Invalid argument]
> [root@...co pt]#

hum, so round events disable ordering, which is required by pt

        if (script->show_round_events) {
                script->tool.ordered_events = false;
	..

so the --show-round-events option always fails on intel_pt data:

	[jolsa@...va perf]$ ./perf script --show-round-events
	Intel Processor Trace requires ordered events
	0x2e8 [0x38]: failed to process type: 3 [Invalid argument]

> 
> So I have all patches but this last one, will test and push Ingo's way
> so that we make progress, we can get this one later after we figure this
> out.

thanks,
jirka