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Date: Fri, 21 Apr 2023 13:04:56 +0800
From: Changbin Du <changbin.du@...wei.com>
To: Adrian Hunter <adrian.hunter@...el.com>
CC: Changbin Du <changbin.du@...wei.com>,
Arnaldo Carvalho de Melo <acme@...nel.org>,
Mark Rutland <mark.rutland@....com>,
Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
Jiri Olsa <jolsa@...nel.org>,
Namhyung Kim <namhyung@...nel.org>,
Ian Rogers <irogers@...gle.com>,
<linux-perf-users@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
Hui Wang <hw.huiwang@...wei.com>,
Peter Zijlstra <peterz@...radead.org>,
Ingo Molnar <mingo@...hat.com>
Subject: Re: [PATCH v5 2/3] perf: add helper map__fprintf_dsoname_dsoff
> What do you get if you try below diff on top of
> your patches:
>
> diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c
> index c7bf1ac14e90..df0d21141185 100644
> --- a/tools/perf/builtin-script.c
> +++ b/tools/perf/builtin-script.c
> @@ -576,8 +576,11 @@ static void set_print_ip_opts(struct perf_event_attr *attr)
> if (PRINT_FIELD(DSO))
> output[type].print_ip_opts |= EVSEL__PRINT_DSO;
>
> - if (PRINT_FIELD(DSOFF))
> + if (PRINT_FIELD(DSOFF)) {
> output[type].print_ip_opts |= EVSEL__PRINT_DSOFF;
> + /* DSO offset is relative to dso->longname */
> + symbol_conf.show_kernel_path = true;
> + }
>
> if (PRINT_FIELD(SYMOFFSET))
> output[type].print_ip_opts |= EVSEL__PRINT_SYMOFFSET;
> diff --git a/tools/perf/util/dso.c b/tools/perf/util/dso.c
> index a86614599269..19ebfd3468cc 100644
> --- a/tools/perf/util/dso.c
> +++ b/tools/perf/util/dso.c
> @@ -67,6 +67,42 @@ char dso__symtab_origin(const struct dso *dso)
> return origin[dso->symtab_type];
> }
>
> +bool dso__is_file(const struct dso *dso)
> +{
> + switch (dso->binary_type) {
> + case DSO_BINARY_TYPE__KALLSYMS:
> + case DSO_BINARY_TYPE__GUEST_KALLSYMS:
> + return false;
> + case DSO_BINARY_TYPE__VMLINUX:
> + case DSO_BINARY_TYPE__GUEST_VMLINUX:
> + return true;
> + case DSO_BINARY_TYPE__JAVA_JIT:
> + return false;
> + case DSO_BINARY_TYPE__DEBUGLINK:
> + case DSO_BINARY_TYPE__BUILD_ID_CACHE:
> + case DSO_BINARY_TYPE__BUILD_ID_CACHE_DEBUGINFO:
> + case DSO_BINARY_TYPE__FEDORA_DEBUGINFO:
> + case DSO_BINARY_TYPE__UBUNTU_DEBUGINFO:
> + case DSO_BINARY_TYPE__MIXEDUP_UBUNTU_DEBUGINFO:
> + case DSO_BINARY_TYPE__BUILDID_DEBUGINFO:
> + case DSO_BINARY_TYPE__SYSTEM_PATH_DSO:
> + case DSO_BINARY_TYPE__GUEST_KMODULE:
> + case DSO_BINARY_TYPE__GUEST_KMODULE_COMP:
> + case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE:
> + case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE_COMP:
> + case DSO_BINARY_TYPE__KCORE:
> + case DSO_BINARY_TYPE__GUEST_KCORE:
> + case DSO_BINARY_TYPE__OPENEMBEDDED_DEBUGINFO:
> + return true;
> + case DSO_BINARY_TYPE__BPF_PROG_INFO:
> + case DSO_BINARY_TYPE__BPF_IMAGE:
> + case DSO_BINARY_TYPE__OOL:
> + case DSO_BINARY_TYPE__NOT_FOUND:
> + default:
> + return false;
> + }
> +}
> +
> int dso__read_binary_type_filename(const struct dso *dso,
> enum dso_binary_type type,
> char *root_dir, char *filename, size_t size)
> diff --git a/tools/perf/util/dso.h b/tools/perf/util/dso.h
> index 0b7c7633b9f6..fb33f5224fb6 100644
> --- a/tools/perf/util/dso.h
> +++ b/tools/perf/util/dso.h
> @@ -396,6 +396,8 @@ static inline bool dso__is_kallsyms(struct dso *dso)
> return dso->kernel && dso->long_name[0] != '/';
> }
>
> +bool dso__is_file(const struct dso *dso);
> +
> void dso__free_a2l(struct dso *dso);
>
> enum dso_type dso__type(struct dso *dso, struct machine *machine);
> diff --git a/tools/perf/util/map.c b/tools/perf/util/map.c
> index 7da96b41100f..9b79f88d371c 100644
> --- a/tools/perf/util/map.c
> +++ b/tools/perf/util/map.c
> @@ -447,11 +447,12 @@ size_t map__fprintf_dsoname(struct map *map, FILE *fp)
>
> size_t map__fprintf_dsoname_dsoff(struct map *map, bool print_off, u64 addr, FILE *fp)
> {
> + const struct dso *dso = map ? map__dso(map) : NULL;
> int printed = 0;
>
> printed += fprintf(fp, " (");
> printed += map__fprintf_dsoname(map, fp);
> - if (print_off && map && map__dso(map) && !map__dso(map)->kernel)
> + if (print_off && dso && dso__is_file(dso))
> printed += fprintf(fp, "+0x%" PRIx64, addr);
> printed += fprintf(fp, ")");
>
>
Here are the outputs with above change.
For elf in build-id cache, it works as expected.
$ sudo perf script -F +dsoff
perf-exec 12768 135.648023: 1 cycles: ffffffff96c8ee44 native_write_msr+0x4 (/home/changbin/.debug/.build-id/5e/2fa721660d663f38b6e1aa98d6fa3776974b54/elf+0x28ee44)
perf-exec 12768 135.648028: 1 cycles: ffffffff96c8ee44 native_write_msr+0x4 (/home/changbin/.debug/.build-id/5e/2fa721660d663f38b6e1aa98d6fa3776974b54/elf+0x28ee44)
perf-exec 12768 135.648030: 11 cycles: ffffffff96c8ee44 native_write_msr+0x4 (/home/changbin/.debug/.build-id/5e/2fa721660d663f38b6e1aa98d6fa3776974b54/elf+0x28ee44)
perf-exec 12768 135.648031: 295 cycles: ffffffff96c8ee46 native_write_msr+0x6 (/home/changbin/.debug/.build-id/5e/2fa721660d663f38b6e1aa98d6fa3776974b54/elf+0x28ee46)
perf-exec 12768 135.648032: 8850 cycles: ffffffff96c4c686 native_sched_clock+0x66 (/home/changbin/.debug/.build-id/5e/2fa721660d663f38b6e1aa98d6fa3776974b54/elf+0x24c686)
ls 27521 501.120978: 4309123 cycles: 7f31cb51c591 _dl_sort_maps+0x301 (/usr/lib/x86_64-linux-gnu/ld-2.31.so)
But when I specify my vmlinux: (the binary_type is DSO_BINARY_TYPE__SYSTEM_PATH_DSO)
$ sudo perf script -k linux/vmlinux -F +dsoff
perf-exec 12768 135.648023: 1 cycles: ffffffff96c8ee44 [unknown] (/lib/modules/6.2.12/build/vmlinux)
perf-exec 12768 135.648028: 1 cycles: ffffffff96c8ee44 [unknown] (/lib/modules/6.2.12/build/vmlinux+0xffffffff96c8ee44)
perf-exec 12768 135.648030: 11 cycles: ffffffff96c8ee44 [unknown] (/lib/modules/6.2.12/build/vmlinux+0xffffffff96c8ee44)
perf-exec 12768 135.648031: 295 cycles: ffffffff96c8ee46 [unknown] (/lib/modules/6.2.12/build/vmlinux+0xffffffff96c8ee46)
This is for kcore file:
$ sudo perf script --kallsyms /proc/kallsyms -F +dsoff
perf-exec 18922 267.284368: 1 cycles: ffffffff96c8ee44 native_write_msr+0x4 (/proc/kcore+0x7fff96c91e44)
perf-exec 18922 267.284372: 1 cycles: ffffffff96c8ee44 native_write_msr+0x4 (/proc/kcore+0x7fff96c91e44)
perf-exec 18922 267.284374: 11 cycles: ffffffff96c8ee44 native_write_msr+0x4 (/proc/kcore+0x7fff96c91e44)
For ko, it's wierd that the binary_type of first one is DSO_BINARY_TYPE__NOT_FOUND.
$ sudo perf script -F +dsoff | grep '.ko'
gedit 37410 769.927194: 199304 cycles: ffffffffc0a3d050 ipt_do_table+0x0 (/lib/modules/6.2.12/kernel/net/ipv4/netfilter/ip_tables.ko)
gedit 37410 770.459667: 271035 cycles: ffffffffc0a3d050 ipt_do_table+0x0 (/lib/modules/6.2.12/kernel/net/ipv4/netfilter/ip_tables.ko+0xf0)
gedit 37410 770.649838: 271878 cycles: ffffffffc0a3d050 ipt_do_table+0x0 (/lib/modules/6.2.12/kernel/net/ipv4/netfilter/ip_tables.ko+0xf0)
gedit 37410 771.239221: 216084 cycles: ffffffffc0a3d13b ipt_do_table+0xeb (/lib/modules/6.2.12/kernel/net/ipv4/netfilter/ip_tables.ko+0x1db)
gedit 37410 771.257816: 219469 cycles: ffffffffc0a3d165 ipt_do_table+0x115 (/lib/modules/6.2.12/kernel/net/ipv4/netfilter/ip_tables.ko+0x205)
gedit 37410 771.531158: 288970 cycles: ffffffffc0a3d151 ipt_do_table+0x101 (/lib/modules/6.2.12/kernel/net/ipv4/netfilter/ip_tables.ko+0x1f1)
gedit 37410 771.816916: 321215 cycles: ffffffffc0a3d151 ipt_do_table+0x101 (/lib/modules/6.2.12/kernel/net/ipv4/netfilter/ip_tables.ko+0x1f1)
gedit 37410 773.624786: 332528 cycles: ffffffffc0a3d2ea ipt_do_table+0x29a (/lib/modules/6.2.12/kernel/net/ipv4/netfilter/ip_tables.ko+0x38a)
Maybe we can just filter by name? e.g. '[kernel.kallsyms]', '[guest.kernel.kallsyms]'.
--
Cheers,
Changbin Du
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