Commit 4b017123 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge tag 'trace-tools-v6.13' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace 

Pull tracing tools updates from Steven Rostedt:

 - Add ':' to getopt option 'trace-buffer-size' in timerlat_hist for
   consistency

 - Remove unused sched_getattr define

 - Rename sched_setattr() helper to syscall_sched_setattr() to avoid
   conflicts

 - Update counters to long from int to avoid overflow

 - Add libcpupower dependency detection

 - Add --deepest-idle-state to timerlat to limit deep idle sleeps

 - Other minor clean ups and documentation changes

* tag 'trace-tools-v6.13' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace:
  verification/dot2: Improve dot parser robustness
  tools/rtla: Improve exception handling in timerlat_load.py
  tools/rtla: Enhance argument parsing in timerlat_load.py
  tools/rtla: Improve code readability in timerlat_load.py
  rtla/timerlat: Do not set params->user_workload with -U
  rtla: Documentation: Mention --deepest-idle-state
  rtla/timerlat: Add --deepest-idle-state for hist
  rtla/timerlat: Add --deepest-idle-state for top
  rtla/utils: Add idle state disabling via libcpupower
  rtla: Add optional dependency on libcpupower
  tools/build: Add libcpupower dependency detection
  rtla/timerlat: Make timerlat_hist_cpu->*_count unsigned long long
  rtla/timerlat: Make timerlat_top_cpu->*_count unsigned long long
  tools/rtla: fix collision with glibc sched_attr/sched_set_attr
  tools/rtla: drop __NR_sched_getattr
  rtla: Fix consistency in getopt_long for timerlat_hist
  rv: Fix a typo
  tools/rv: Correct the grammatical errors in the comments
  tools/rv: Correct the grammatical errors in the comments
  rtla: use the definition for stdout fd when calling isatty()
parents f1db8258 571f8b3f

Documentation/tools/rtla/common_timerlat_options.rst

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@@ -31,6 +31,14 @@ 
        *cyclictest* sets this value to *0* by default, use **--dma-latency** *0* to have

        similar results.



**--deepest-idle-state** *n*

        Disable idle states higher than *n* for cpus that are running timerlat threads to

        reduce exit from idle latencies. If *n* is -1, all idle states are disabled.

        On exit from timerlat, the idle state setting is restored to its original state

        before running timerlat.



        Requires rtla to be built with libcpupower.



**-k**, **--kernel-threads**



        Use timerlat kernel-space threads, in contrast of **-u**.

kernel/trace/rv/rv.c

+1 −1
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@@ -41,7 +41,7 @@ 
 * per-task monitor, and so on), and the helper functions that glue the

 * monitor to the system via trace. Generally, a monitor includes some form

 * of trace output as a reaction for event parsing and exceptions,

 * as depicted bellow:

 * as depicted below:

 *

 * Linux  +----- RV Monitor ----------------------------------+ Formal

 *  Realm |                                                   |  Realm

tools/build/Makefile.feature

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@@ -53,6 +53,7 @@ FEATURE_TESTS_BASIC := \ 
        libslang-include-subdir         \

        libtraceevent                   \

        libtracefs                      \

        libcpupower                     \

        libcrypto                       \

        libunwind                       \

        pthread-attr-setaffinity-np     \

tools/build/feature/Makefile

+4 −0
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@@ -38,6 +38,7 @@ FILES= \ 
         test-libslang.bin                      \

         test-libslang-include-subdir.bin       \

         test-libtraceevent.bin                 \

         test-libcpupower.bin                   \

         test-libtracefs.bin                    \

         test-libcrypto.bin                     \

         test-libunwind.bin                     \
@@ -248,6 +249,9 @@ $(OUTPUT)test-libslang-include-subdir.bin: 
$(OUTPUT)test-libtraceevent.bin:

	$(BUILD) -ltraceevent



$(OUTPUT)test-libcpupower.bin:

	$(BUILD) -lcpupower



$(OUTPUT)test-libtracefs.bin:

	 $(BUILD) $(shell $(PKG_CONFIG) --cflags libtracefs 2>/dev/null) -ltracefs

tools/build/feature/test-libcpupower.c

0 → 100644
+8 −0
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// SPDX-License-Identifier: GPL-2.0

#include <cpuidle.h>



int main(void)

{

	int rv = cpuidle_state_count(0);

	return rv;

}