From: Ian Rogers <irogers@google.com>
To: Adrian Hunter <adrian.hunter@intel.com>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>,
Jiri Olsa <jolsa@redhat.com>, Namhyung Kim <namhyung@kernel.org>,
Andi Kleen <ak@linux.intel.com>,
linux-kernel@vger.kernel.org, kvm@vger.kernel.org
Subject: Re: [PATCH 26/35] perf tools: Handle injected guest kernel mmap event
Date: Tue, 19 Jul 2022 18:09:24 -0700 [thread overview]
Message-ID: <CAP-5=fXPCpKqPD3meS2tbWuubs2U1q139J2a=_TTAXrTaWVHZw@mail.gmail.com> (raw)
In-Reply-To: <20220711093218.10967-27-adrian.hunter@intel.com>
On Mon, Jul 11, 2022 at 2:33 AM Adrian Hunter <adrian.hunter@intel.com> wrote:
>
> If a kernel mmap event was recorded inside a guest and injected into a host
> perf.data file, then it will match a host mmap_name not a guest mmap_name,
> see machine__set_mmap_name(). So try matching a host mmap_name in that
> case.
>
> Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Acked-by: Ian Rogers <irogers@google.com>
Thanks,
Ian
> ---
> tools/perf/util/machine.c | 15 ++++++++++++---
> 1 file changed, 12 insertions(+), 3 deletions(-)
>
> diff --git a/tools/perf/util/machine.c b/tools/perf/util/machine.c
> index 27d1a38f44c3..8f657225fb02 100644
> --- a/tools/perf/util/machine.c
> +++ b/tools/perf/util/machine.c
> @@ -1742,6 +1742,7 @@ static int machine__process_kernel_mmap_event(struct machine *machine,
> struct map *map;
> enum dso_space_type dso_space;
> bool is_kernel_mmap;
> + const char *mmap_name = machine->mmap_name;
>
> /* If we have maps from kcore then we do not need or want any others */
> if (machine__uses_kcore(machine))
> @@ -1752,8 +1753,16 @@ static int machine__process_kernel_mmap_event(struct machine *machine,
> else
> dso_space = DSO_SPACE__KERNEL_GUEST;
>
> - is_kernel_mmap = memcmp(xm->name, machine->mmap_name,
> - strlen(machine->mmap_name) - 1) == 0;
> + is_kernel_mmap = memcmp(xm->name, mmap_name, strlen(mmap_name) - 1) == 0;
> + if (!is_kernel_mmap && !machine__is_host(machine)) {
> + /*
> + * If the event was recorded inside the guest and injected into
> + * the host perf.data file, then it will match a host mmap_name,
> + * so try that - see machine__set_mmap_name().
> + */
> + mmap_name = "[kernel.kallsyms]";
> + is_kernel_mmap = memcmp(xm->name, mmap_name, strlen(mmap_name) - 1) == 0;
> + }
> if (xm->name[0] == '/' ||
> (!is_kernel_mmap && xm->name[0] == '[')) {
> map = machine__addnew_module_map(machine, xm->start,
> @@ -1767,7 +1776,7 @@ static int machine__process_kernel_mmap_event(struct machine *machine,
> dso__set_build_id(map->dso, bid);
>
> } else if (is_kernel_mmap) {
> - const char *symbol_name = (xm->name + strlen(machine->mmap_name));
> + const char *symbol_name = xm->name + strlen(mmap_name);
> /*
> * Should be there already, from the build-id table in
> * the header.
> --
> 2.25.1
>
next prev parent reply other threads:[~2022-07-20 1:09 UTC|newest]
Thread overview: 83+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-07-11 9:31 [PATCH 00/35] perf intel-pt: Add support for tracing virtual machine user space on the host Adrian Hunter
2022-07-11 9:31 ` [PATCH 01/35] perf tools: Fix dso_id inode generation comparison Adrian Hunter
2022-07-18 14:57 ` Arnaldo Carvalho de Melo
2022-07-19 10:18 ` Adrian Hunter
2022-07-19 15:13 ` Ian Rogers
2022-07-19 19:16 ` Arnaldo Carvalho de Melo
2022-07-11 9:31 ` [PATCH 02/35] perf tools: Export dsos__for_each_with_build_id() Adrian Hunter
2022-07-19 16:55 ` Ian Rogers
2022-07-11 9:31 ` [PATCH 03/35] perf ordered_events: Add ordered_events__last_flush_time() Adrian Hunter
2022-07-19 16:56 ` Ian Rogers
2022-07-11 9:31 ` [PATCH 04/35] perf tools: Export perf_event__process_finished_round() Adrian Hunter
2022-07-19 17:04 ` Ian Rogers
2022-08-09 11:37 ` Adrian Hunter
2022-07-11 9:31 ` [PATCH 05/35] perf tools: Factor out evsel__id_hdr_size() Adrian Hunter
2022-07-19 17:09 ` Ian Rogers
2022-08-09 11:49 ` Adrian Hunter
2022-08-09 17:07 ` Ian Rogers
2022-07-11 9:31 ` [PATCH 06/35] perf tools: Add perf_event__synthesize_id_sample() Adrian Hunter
2022-07-19 17:10 ` Ian Rogers
2022-07-11 9:31 ` [PATCH 07/35] perf script: Add --dump-unsorted-raw-trace option Adrian Hunter
2022-07-19 17:11 ` Ian Rogers
2022-07-11 9:31 ` [PATCH 08/35] perf buildid-cache: Add guestmount'd files to the build ID cache Adrian Hunter
2022-07-19 17:41 ` Ian Rogers
2022-08-09 12:21 ` Adrian Hunter
2022-07-11 9:31 ` [PATCH 09/35] perf buildid-cache: Do not require purge files to also be in the file system Adrian Hunter
2022-07-19 17:44 ` Ian Rogers
2022-07-11 9:31 ` [PATCH 10/35] perf tools: Add machine_pid and vcpu to id_index Adrian Hunter
2022-07-19 17:48 ` Ian Rogers
2022-08-09 12:19 ` Adrian Hunter
2022-07-11 9:31 ` [PATCH 11/35] perf session: Create guest machines from id_index Adrian Hunter
2022-07-19 17:51 ` Ian Rogers
2022-07-11 9:31 ` [PATCH 12/35] perf tools: Add guest_cpu to hypervisor threads Adrian Hunter
2022-07-20 0:23 ` Ian Rogers
2022-07-11 9:31 ` [PATCH 13/35] perf tools: Add machine_pid and vcpu to perf_sample Adrian Hunter
2022-07-20 0:36 ` Ian Rogers
2022-07-11 9:31 ` [PATCH 14/35] perf tools: Use sample->machine_pid to find guest machine Adrian Hunter
2022-07-20 0:37 ` Ian Rogers
2022-07-11 9:31 ` [PATCH 15/35] perf script: Add machine_pid and vcpu Adrian Hunter
2022-07-20 0:39 ` Ian Rogers
2022-07-11 9:31 ` [PATCH 16/35] perf dlfilter: " Adrian Hunter
2022-07-20 0:42 ` Ian Rogers
2022-07-11 9:32 ` [PATCH 17/35] perf auxtrace: Add machine_pid and vcpu to auxtrace_error Adrian Hunter
2022-07-20 0:43 ` Ian Rogers
2022-07-11 9:32 ` [PATCH 18/35] perf script python: Add machine_pid and vcpu Adrian Hunter
2022-07-20 0:43 ` Ian Rogers
2022-07-11 9:32 ` [PATCH 19/35] perf script python: intel-pt-events: " Adrian Hunter
2022-07-20 0:44 ` Ian Rogers
2022-07-11 9:32 ` [PATCH 20/35] perf tools: Remove also guest kcore_dir with host kcore_dir Adrian Hunter
2022-07-20 0:45 ` Ian Rogers
2022-07-11 9:32 ` [PATCH 21/35] perf tools: Make has_kcore_dir() work also for guest kcore_dir Adrian Hunter
2022-07-20 0:49 ` Ian Rogers
2022-07-11 9:32 ` [PATCH 22/35] perf tools: Automatically use guest kcore_dir if present Adrian Hunter
2022-07-20 0:51 ` Ian Rogers
2022-07-11 9:32 ` [PATCH 23/35] perf tools: Add reallocarray_as_needed() Adrian Hunter
2022-07-20 0:55 ` Ian Rogers
2022-08-09 16:48 ` Adrian Hunter
2022-07-11 9:32 ` [PATCH 24/35] perf inject: Add support for injecting guest sideband events Adrian Hunter
2022-07-20 1:06 ` Ian Rogers
2022-08-11 17:19 ` Adrian Hunter
2022-07-11 9:32 ` [PATCH 25/35] perf machine: Use realloc_array_as_needed() in machine__set_current_tid() Adrian Hunter
2022-07-11 9:32 ` [PATCH 26/35] perf tools: Handle injected guest kernel mmap event Adrian Hunter
2022-07-20 1:09 ` Ian Rogers [this message]
2022-07-11 9:32 ` [PATCH 27/35] perf tools: Add perf_event__is_guest() Adrian Hunter
2022-07-20 1:11 ` Ian Rogers
2022-07-20 14:06 ` Arnaldo Carvalho de Melo
2022-07-20 14:56 ` Ian Rogers
2022-07-11 9:32 ` [PATCH 28/35] perf intel-pt: Remove guest_machine_pid Adrian Hunter
2022-07-20 1:12 ` Ian Rogers
2022-07-11 9:32 ` [PATCH 29/35] perf intel-pt: Add some more logging to intel_pt_walk_next_insn() Adrian Hunter
2022-07-20 1:13 ` Ian Rogers
2022-07-11 9:32 ` [PATCH 30/35] perf intel-pt: Track guest context switches Adrian Hunter
2022-07-20 1:13 ` Ian Rogers
2022-07-11 9:32 ` [PATCH 31/35] perf intel-pt: Disable sync switch with guest sideband Adrian Hunter
2022-07-20 1:14 ` Ian Rogers
2022-07-11 9:32 ` [PATCH 32/35] perf intel-pt: Determine guest thread from " Adrian Hunter
2022-07-20 1:15 ` Ian Rogers
2022-07-11 9:32 ` [PATCH 33/35] perf intel-pt: Add machine_pid and vcpu to auxtrace_error Adrian Hunter
2022-07-20 5:27 ` Ian Rogers
2022-07-11 9:32 ` [PATCH 34/35] perf intel-pt: Use guest pid/tid etc in guest samples Adrian Hunter
2022-07-20 5:28 ` Ian Rogers
2022-07-11 9:32 ` [PATCH 35/35] perf intel-pt: Add documentation for tracing guest machine user space Adrian Hunter
2022-07-20 5:29 ` Ian Rogers
2022-07-18 15:28 ` [PATCH 00/35] perf intel-pt: Add support for tracing virtual machine user space on the host Arnaldo Carvalho de Melo
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