Commit 611875d5 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge tag 'perf-tools-fixes-for-v6.0-2022-08-27' of... 

Merge tag 'perf-tools-fixes-for-v6.0-2022-08-27' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux

Pull perf tools fixes from Arnaldo Carvalho de Melo:

 - Fixup setup of weak groups when using 'perf stat --repeat', add a
   'perf test' for it.

 - Fix memory leaks in 'perf sched record' detected with
   -fsanitize=address.

 - Fix build when PYTHON_CONFIG is user supplied.

 - Capitalize topdown metrics' names in 'perf stat', so that the output,
   sometimes parsed, matches the Intel SDM docs.

 - Make sure the documentation for the save_type filter about Intel
   systems with Arch LBR support (12th-Gen+ client or 4th-Gen Xeon+
   server) reflects recent related kernel changes.

 - Fix 'perf record' man page formatting of description of support to
   hybrid systems.

 - Update arm64´s KVM header from the kernel sources.

* tag 'perf-tools-fixes-for-v6.0-2022-08-27' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux:
  perf stat: Capitalize topdown metrics' names
  perf docs: Update the documentation for the save_type filter
  perf sched: Fix memory leaks in __cmd_record detected with -fsanitize=address
  perf record: Fix manpage formatting of description of support to hybrid systems
  perf test: Stat test for repeat with a weak group
  perf stat: Clear evsel->reset_group for each stat run
  tools kvm headers arm64: Update KVM header from the kernel sources
  perf python: Fix build when PYTHON_CONFIG is user supplied
parents 10d4879f 48648548

tools/arch/arm64/include/uapi/asm/kvm.h

+4 −2
Original line number Diff line number Diff line
@@ -75,9 +75,11 @@ struct kvm_regs { 


/* KVM_ARM_SET_DEVICE_ADDR ioctl id encoding */

#define KVM_ARM_DEVICE_TYPE_SHIFT	0

#define KVM_ARM_DEVICE_TYPE_MASK	(0xffff << KVM_ARM_DEVICE_TYPE_SHIFT)

#define KVM_ARM_DEVICE_TYPE_MASK	GENMASK(KVM_ARM_DEVICE_TYPE_SHIFT + 15, \

						KVM_ARM_DEVICE_TYPE_SHIFT)

#define KVM_ARM_DEVICE_ID_SHIFT		16

#define KVM_ARM_DEVICE_ID_MASK		(0xffff << KVM_ARM_DEVICE_ID_SHIFT)

#define KVM_ARM_DEVICE_ID_MASK		GENMASK(KVM_ARM_DEVICE_ID_SHIFT + 15, \

						KVM_ARM_DEVICE_ID_SHIFT)



/* Supported device IDs */

#define KVM_ARM_DEVICE_VGIC_V2		0

tools/perf/Documentation/intel-hybrid.txt

+0 −10
Original line number Diff line number Diff line
@@ -21,11 +21,6 @@ cat /sys/devices/cpu_atom/cpus 


It indicates cpu0-cpu15 are core cpus and cpu16-cpu23 are atom cpus.



Quickstart



List hybrid event

-----------------



As before, use perf-list to list the symbolic event.



perf list
@@ -40,7 +35,6 @@ the event is belong to. Same event name but with different pmu can 
be supported.



Enable hybrid event with a specific pmu

---------------------------------------



To enable a core only event or atom only event, following syntax is supported:
@@ -53,7 +47,6 @@ For example, count the 'cycles' event on core cpus. 
	perf stat -e cpu_core/cycles/



Create two events for one hardware event automatically

------------------------------------------------------



When creating one event and the event is available on both atom and core,

two events are created automatically. One is for atom, the other is for
@@ -132,7 +125,6 @@ For perf-stat result, it displays two events: 
The first 'cycles' is core event, the second 'cycles' is atom event.



Thread mode example:

--------------------



perf-stat reports the scaled counts for hybrid event and with a percentage

displayed. The percentage is the event's running time/enabling time.
@@ -176,14 +168,12 @@ perf_event_attr: 
       604,097,080      cpu_atom/cycles/                                              (99.57%)



perf-record:

------------



If there is no '-e' specified in perf record, on hybrid platform,

it creates two default 'cycles' and adds them to event list. One

is for core, the other is for atom.



perf-stat:

----------



If there is no '-e' specified in perf stat, on hybrid platform,

besides of software events, following events are created and

tools/perf/Documentation/perf-record.txt

+5 −2
Original line number Diff line number Diff line
@@ -397,6 +397,9 @@ following filters are defined: 
	- abort_tx: only when the target is a hardware transaction abort

	- cond: conditional branches

	- save_type: save branch type during sampling in case binary is not available later

		     For the platforms with Intel Arch LBR support (12th-Gen+ client or

		     4th-Gen Xeon+ server), the save branch type is unconditionally enabled

		     when the taken branch stack sampling is enabled.



+

The option requires at least one branch type among any, any_call, any_ret, ind_call, cond.
@@ -757,8 +760,6 @@ events in data directory files. Option specified with no or empty value 
defaults to CPU layout. Masks defined or provided by the option value are

filtered through the mask provided by -C option.



include::intel-hybrid.txt[]



--debuginfod[=URLs]::

	Specify debuginfod URL to be used when cacheing perf.data binaries,

	it follows the same syntax as the DEBUGINFOD_URLS variable, like:
@@ -778,6 +779,8 @@ include::intel-hybrid.txt[] 
	only, as of now.  So the applications built without the frame

	pointer might see bogus addresses.



include::intel-hybrid.txt[]



SEE ALSO

--------

linkperf:perf-stat[1], linkperf:perf-list[1], linkperf:perf-intel-pt[1]

tools/perf/Makefile.config

+1 −1
Original line number Diff line number Diff line
@@ -265,7 +265,7 @@ endif 
# defined. get-executable-or-default fails with an error if the first argument is supplied but

# doesn't exist.

override PYTHON_CONFIG := $(call get-executable-or-default,PYTHON_CONFIG,$(PYTHON_AUTO))

override PYTHON := $(call get-executable-or-default,PYTHON,$(subst -config,,$(PYTHON_AUTO)))

override PYTHON := $(call get-executable-or-default,PYTHON,$(subst -config,,$(PYTHON_CONFIG)))



grep-libs  = $(filter -l%,$(1))

strip-libs  = $(filter-out -l%,$(1))

tools/perf/builtin-sched.c

+19 −5
Original line number Diff line number Diff line
@@ -3355,7 +3355,8 @@ static bool schedstat_events_exposed(void) 
static int __cmd_record(int argc, const char **argv)

{

	unsigned int rec_argc, i, j;

	const char **rec_argv;

	char **rec_argv;

	const char **rec_argv_copy;

	const char * const record_args[] = {

		"record",

		"-a",
@@ -3384,6 +3385,7 @@ static int __cmd_record(int argc, const char **argv) 
		ARRAY_SIZE(schedstat_args) : 0;



	struct tep_event *waking_event;

	int ret;



	/*

	 * +2 for either "-e", "sched:sched_wakeup" or
@@ -3391,14 +3393,18 @@ static int __cmd_record(int argc, const char **argv) 
	 */

	rec_argc = ARRAY_SIZE(record_args) + 2 + schedstat_argc + argc - 1;

	rec_argv = calloc(rec_argc + 1, sizeof(char *));



	if (rec_argv == NULL)

		return -ENOMEM;

	rec_argv_copy = calloc(rec_argc + 1, sizeof(char *));

	if (rec_argv_copy == NULL) {

		free(rec_argv);

		return -ENOMEM;

	}



	for (i = 0; i < ARRAY_SIZE(record_args); i++)

		rec_argv[i] = strdup(record_args[i]);



	rec_argv[i++] = "-e";

	rec_argv[i++] = strdup("-e");

	waking_event = trace_event__tp_format("sched", "sched_waking");

	if (!IS_ERR(waking_event))

		rec_argv[i++] = strdup("sched:sched_waking");
@@ -3409,11 +3415,19 @@ static int __cmd_record(int argc, const char **argv) 
		rec_argv[i++] = strdup(schedstat_args[j]);



	for (j = 1; j < (unsigned int)argc; j++, i++)

		rec_argv[i] = argv[j];

		rec_argv[i] = strdup(argv[j]);



	BUG_ON(i != rec_argc);



	return cmd_record(i, rec_argv);

	memcpy(rec_argv_copy, rec_argv, sizeof(char *) * rec_argc);

	ret = cmd_record(rec_argc, rec_argv_copy);



	for (i = 0; i < rec_argc; i++)

		free(rec_argv[i]);

	free(rec_argv);

	free(rec_argv_copy);



	return ret;

}



int cmd_sched(int argc, const char **argv)