There's no field for the cgroup, let's add one. To do that, users need to
specify --all-cgroup option for perf record to capture the cgroup info.
$ perf record --all-cgroups -- true
$ perf script -F comm,pid,cgroup
true 337112 /user.slice/user-657345.slice/[email protected]/...
true 337112 /user.slice/user-657345.slice/[email protected]/...
true 337112 /user.slice/user-657345.slice/[email protected]/...
true 337112 /user.slice/user-657345.slice/[email protected]/...
If it's recorded without the --all-cgroups, it'd complain.
$ perf script -F comm,pid,cgroup
Samples for 'cycles:u' event do not have CGROUP attribute set. Cannot print 'cgroup' field.
Hint: run 'perf record --all-cgroups ...'
Signed-off-by: Namhyung Kim <[email protected]>
---
tools/perf/Documentation/perf-script.txt | 5 ++++-
tools/perf/builtin-script.c | 22 +++++++++++++++++++++-
2 files changed, 25 insertions(+), 2 deletions(-)
diff --git a/tools/perf/Documentation/perf-script.txt b/tools/perf/Documentation/perf-script.txt
index 8d77182fbf31..a2ebadc9d948 100644
--- a/tools/perf/Documentation/perf-script.txt
+++ b/tools/perf/Documentation/perf-script.txt
@@ -134,7 +134,7 @@ OPTIONS
srcline, period, iregs, uregs, brstack, brstacksym, flags, bpf-output,
brstackinsn, brstackinsnlen, brstackoff, callindent, insn, insnlen, synth,
phys_addr, metric, misc, srccode, ipc, data_page_size, code_page_size, ins_lat,
- machine_pid, vcpu.
+ machine_pid, vcpu, cgroup.
Field list can be prepended with the type, trace, sw or hw,
to indicate to which event type the field list applies.
e.g., -F sw:comm,tid,time,ip,sym and -F trace:time,cpu,trace
@@ -231,6 +231,9 @@ OPTIONS
perf inject to insert a perf.data file recorded inside a virtual machine into
a perf.data file recorded on the host at the same time.
+ The cgroup fields requires sample having the cgroup id which is saved
+ when "--all-cgroups" option is passed to 'perf record'.
+
Finally, a user may not set fields to none for all event types.
i.e., -F "" is not allowed.
diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c
index 69394ac0a20d..731821fd0d3e 100644
--- a/tools/perf/builtin-script.c
+++ b/tools/perf/builtin-script.c
@@ -59,6 +59,7 @@
#include "util/dlfilter.h"
#include "util/record.h"
#include "util/util.h"
+#include "util/cgroup.h"
#include "perf.h"
#include <linux/ctype.h>
@@ -130,6 +131,7 @@ enum perf_output_field {
PERF_OUTPUT_BRSTACKINSNLEN = 1ULL << 36,
PERF_OUTPUT_MACHINE_PID = 1ULL << 37,
PERF_OUTPUT_VCPU = 1ULL << 38,
+ PERF_OUTPUT_CGROUP = 1ULL << 39,
};
struct perf_script {
@@ -200,6 +202,7 @@ struct output_option {
{.str = "brstackinsnlen", .field = PERF_OUTPUT_BRSTACKINSNLEN},
{.str = "machine_pid", .field = PERF_OUTPUT_MACHINE_PID},
{.str = "vcpu", .field = PERF_OUTPUT_VCPU},
+ {.str = "cgroup", .field = PERF_OUTPUT_CGROUP},
};
enum {
@@ -542,6 +545,12 @@ static int evsel__check_attr(struct evsel *evsel, struct perf_session *session)
evsel__check_stype(evsel, PERF_SAMPLE_WEIGHT_STRUCT, "WEIGHT_STRUCT", PERF_OUTPUT_INS_LAT))
return -EINVAL;
+ if (PRINT_FIELD(CGROUP) &&
+ evsel__check_stype(evsel, PERF_SAMPLE_CGROUP, "CGROUP", PERF_OUTPUT_CGROUP)) {
+ pr_err("Hint: run 'perf record --all-cgroups ...'\n");
+ return -EINVAL;
+ }
+
return 0;
}
@@ -2220,6 +2229,17 @@ static void process_event(struct perf_script *script,
if (PRINT_FIELD(CODE_PAGE_SIZE))
fprintf(fp, " %s", get_page_size_name(sample->code_page_size, str));
+ if (PRINT_FIELD(CGROUP)) {
+ const char *cgrp_name;
+ struct cgroup *cgrp = cgroup__find(machine->env,
+ sample->cgroup);
+ if (cgrp != NULL)
+ cgrp_name = cgrp->name;
+ else
+ cgrp_name = "unknown";
+ fprintf(fp, " %s", cgrp_name);
+ }
+
perf_sample__fprintf_ipc(sample, attr, fp);
fprintf(fp, "\n");
@@ -3856,7 +3876,7 @@ int cmd_script(int argc, const char **argv)
"brstacksym,flags,data_src,weight,bpf-output,brstackinsn,"
"brstackinsnlen,brstackoff,callindent,insn,insnlen,synth,"
"phys_addr,metric,misc,srccode,ipc,tod,data_page_size,"
- "code_page_size,ins_lat",
+ "code_page_size,ins_lat,machine_pid,vcpu,cgroup",
parse_output_fields),
OPT_BOOLEAN('a', "all-cpus", &system_wide,
"system-wide collection from all CPUs"),
--
2.39.1.456.gfc5497dd1b-goog
Em Thu, Jan 26, 2023 at 01:36:10PM -0800, Namhyung Kim escreveu:
> There's no field for the cgroup, let's add one. To do that, users need to
> specify --all-cgroup option for perf record to capture the cgroup info.
>
> $ perf record --all-cgroups -- true
>
> $ perf script -F comm,pid,cgroup
> true 337112 /user.slice/user-657345.slice/[email protected]/...
> true 337112 /user.slice/user-657345.slice/[email protected]/...
> true 337112 /user.slice/user-657345.slice/[email protected]/...
> true 337112 /user.slice/user-657345.slice/[email protected]/...
>
> If it's recorded without the --all-cgroups, it'd complain.
>
> $ perf script -F comm,pid,cgroup
> Samples for 'cycles:u' event do not have CGROUP attribute set. Cannot print 'cgroup' field.
> Hint: run 'perf record --all-cgroups ...'
Thanks, applied.
- Arnaldo
> Signed-off-by: Namhyung Kim <[email protected]>
> ---
> tools/perf/Documentation/perf-script.txt | 5 ++++-
> tools/perf/builtin-script.c | 22 +++++++++++++++++++++-
> 2 files changed, 25 insertions(+), 2 deletions(-)
>
> diff --git a/tools/perf/Documentation/perf-script.txt b/tools/perf/Documentation/perf-script.txt
> index 8d77182fbf31..a2ebadc9d948 100644
> --- a/tools/perf/Documentation/perf-script.txt
> +++ b/tools/perf/Documentation/perf-script.txt
> @@ -134,7 +134,7 @@ OPTIONS
> srcline, period, iregs, uregs, brstack, brstacksym, flags, bpf-output,
> brstackinsn, brstackinsnlen, brstackoff, callindent, insn, insnlen, synth,
> phys_addr, metric, misc, srccode, ipc, data_page_size, code_page_size, ins_lat,
> - machine_pid, vcpu.
> + machine_pid, vcpu, cgroup.
> Field list can be prepended with the type, trace, sw or hw,
> to indicate to which event type the field list applies.
> e.g., -F sw:comm,tid,time,ip,sym and -F trace:time,cpu,trace
> @@ -231,6 +231,9 @@ OPTIONS
> perf inject to insert a perf.data file recorded inside a virtual machine into
> a perf.data file recorded on the host at the same time.
>
> + The cgroup fields requires sample having the cgroup id which is saved
> + when "--all-cgroups" option is passed to 'perf record'.
> +
> Finally, a user may not set fields to none for all event types.
> i.e., -F "" is not allowed.
>
> diff --git a/tools/perf/builtin-script.c b/tools/perf/builtin-script.c
> index 69394ac0a20d..731821fd0d3e 100644
> --- a/tools/perf/builtin-script.c
> +++ b/tools/perf/builtin-script.c
> @@ -59,6 +59,7 @@
> #include "util/dlfilter.h"
> #include "util/record.h"
> #include "util/util.h"
> +#include "util/cgroup.h"
> #include "perf.h"
>
> #include <linux/ctype.h>
> @@ -130,6 +131,7 @@ enum perf_output_field {
> PERF_OUTPUT_BRSTACKINSNLEN = 1ULL << 36,
> PERF_OUTPUT_MACHINE_PID = 1ULL << 37,
> PERF_OUTPUT_VCPU = 1ULL << 38,
> + PERF_OUTPUT_CGROUP = 1ULL << 39,
> };
>
> struct perf_script {
> @@ -200,6 +202,7 @@ struct output_option {
> {.str = "brstackinsnlen", .field = PERF_OUTPUT_BRSTACKINSNLEN},
> {.str = "machine_pid", .field = PERF_OUTPUT_MACHINE_PID},
> {.str = "vcpu", .field = PERF_OUTPUT_VCPU},
> + {.str = "cgroup", .field = PERF_OUTPUT_CGROUP},
> };
>
> enum {
> @@ -542,6 +545,12 @@ static int evsel__check_attr(struct evsel *evsel, struct perf_session *session)
> evsel__check_stype(evsel, PERF_SAMPLE_WEIGHT_STRUCT, "WEIGHT_STRUCT", PERF_OUTPUT_INS_LAT))
> return -EINVAL;
>
> + if (PRINT_FIELD(CGROUP) &&
> + evsel__check_stype(evsel, PERF_SAMPLE_CGROUP, "CGROUP", PERF_OUTPUT_CGROUP)) {
> + pr_err("Hint: run 'perf record --all-cgroups ...'\n");
> + return -EINVAL;
> + }
> +
> return 0;
> }
>
> @@ -2220,6 +2229,17 @@ static void process_event(struct perf_script *script,
> if (PRINT_FIELD(CODE_PAGE_SIZE))
> fprintf(fp, " %s", get_page_size_name(sample->code_page_size, str));
>
> + if (PRINT_FIELD(CGROUP)) {
> + const char *cgrp_name;
> + struct cgroup *cgrp = cgroup__find(machine->env,
> + sample->cgroup);
> + if (cgrp != NULL)
> + cgrp_name = cgrp->name;
> + else
> + cgrp_name = "unknown";
> + fprintf(fp, " %s", cgrp_name);
> + }
> +
> perf_sample__fprintf_ipc(sample, attr, fp);
>
> fprintf(fp, "\n");
> @@ -3856,7 +3876,7 @@ int cmd_script(int argc, const char **argv)
> "brstacksym,flags,data_src,weight,bpf-output,brstackinsn,"
> "brstackinsnlen,brstackoff,callindent,insn,insnlen,synth,"
> "phys_addr,metric,misc,srccode,ipc,tod,data_page_size,"
> - "code_page_size,ins_lat",
> + "code_page_size,ins_lat,machine_pid,vcpu,cgroup",
> parse_output_fields),
> OPT_BOOLEAN('a', "all-cpus", &system_wide,
> "system-wide collection from all CPUs"),
> --
> 2.39.1.456.gfc5497dd1b-goog
>
--
- Arnaldo