[igt-dev] [PATCH i-g-t v4 0/2] PM Suspend debug

[igt-dev] [PATCH i-g-t v4 0/2] PM Suspend debug

[Anshuman Gupta]

This series enhance PM Suspend/Resume debug.

1. Disables console_suspend. 
   v1: https://patchwork.freedesktop.org/series/114517/
2. Enables /sys/power/pm_debug_messages.

Anshuman Gupta (2):
  lib/igt_aux: Disable console suspend for suspend test
  lib/igt_aux: Enable PM Suspend dbg messages

 lib/igt_aux.c | 66 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 66 insertions(+)

-- 
2.25.1

[igt-dev] [PATCH i-g-t v4 1/2] lib/igt_aux: Disable console suspend for suspend test

[Anshuman Gupta]

We need no_console_suspend to be enable in order to dump the suspend
logs over serial console before attempting the suspend during
CI Execution.
Therefore disable the console_suspend using printk module parameters
while executing suspend test.

v2:
- Keep console_suspend restore only in exit handler. [Ashutosh]
- Don't skip the test on open error, while opening printk parameters,
  instead print warning. [Kmail]
v3:
- Fixed cosmetics and return value comment. [Ashutosh]
v4:
- Added igt_aux_enable_pm_suspend_dbg() function doc. [Kmail]

Signed-off-by: Anshuman Gupta <anshuman.gupta@intel.com>
Reviewed-by: Badal Nilawar <badal.nilawar@intel.com>
Reviewed-by: Ashutosh Dixit <ashutosh.dixit@intel.com>
---
 lib/igt_aux.c | 45 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 45 insertions(+)

diff --git a/lib/igt_aux.c b/lib/igt_aux.c
index 386e257834..5eb6d9e270 100644
--- a/lib/igt_aux.c
+++ b/lib/igt_aux.c
@@ -702,6 +702,10 @@ void igt_print_activity(void)
 }
 
 static int autoresume_delay;
+bool __console_suspend_saved_state;
+
+#define SYSFS_MODULE_PRINTK "/sys/module/printk/parameters/"
+#define CONSOLE_SUSPEND_DISABLE false
 
 static const char *suspend_state_name[] = {
 	[SUSPEND_STATE_FREEZE] = "freeze",
@@ -907,6 +911,46 @@ static bool is_mem_sleep_state_supported(int power_dir, enum igt_mem_sleep state
 	return str;
 }
 
+static void igt_aux_pm_suspend_dbg_restore_exit_handler(int sig)
+{
+	int sysfs_fd;
+
+	sysfs_fd = open(SYSFS_MODULE_PRINTK, O_RDONLY);
+
+	if (sysfs_fd < 0)
+		return;
+
+	igt_sysfs_set_boolean(sysfs_fd, "console_suspend", __console_suspend_saved_state);
+	close(sysfs_fd);
+}
+
+/**
+ * igt_aux_enable_pm_suspend_dbg:
+ *
+ * Enhance the System wide suspend/resume debugging by,
+ * disabling console suspend. Disabling console suspend dump the suspend/resume
+ * logs over serial console. That will be useful to debug CI Suspend/Resume issues
+ * tagged with 'Incomplete' result.
+ */
+static void igt_aux_enable_pm_suspend_dbg(void)
+{
+	int sysfs_fd;
+
+	sysfs_fd = open(SYSFS_MODULE_PRINTK, O_RDONLY);
+	if (sysfs_fd > 0) {
+		__console_suspend_saved_state = igt_sysfs_get_boolean(sysfs_fd, "console_suspend");
+
+		if (!igt_sysfs_set_boolean(sysfs_fd, "console_suspend", CONSOLE_SUSPEND_DISABLE))
+			igt_warn("Unable to disable console suspend\n");
+
+		igt_install_exit_handler(igt_aux_pm_suspend_dbg_restore_exit_handler);
+	} else {
+		igt_warn("Unable to open printk parameters Err:%d\n", errno);
+	}
+
+	close(sysfs_fd);
+}
+
 /**
  * igt_system_suspend_autoresume:
  * @state: an #igt_suspend_state, the target suspend state
@@ -945,6 +989,7 @@ void igt_system_suspend_autoresume(enum igt_suspend_state state,
 		      "Suspend to disk requires swap space.\n");
 
 	orig_test = get_suspend_test(power_dir);
+	igt_aux_enable_pm_suspend_dbg();
 
 	if (state == SUSPEND_STATE_S3) {
 		orig_mem_sleep = get_mem_sleep();
-- 
2.25.1

[igt-dev] [PATCH i-g-t v4 2/2] lib/igt_aux: Enable PM Suspend dbg messages

[Anshuman Gupta]

Enabling PM Suspend dbg messages by turning on
/sys/power/pm_debug_messages switch also adding an
exit handler provision to restore the
pm_debug_messages state.

v2:
- Fixed sysfs_fd leak. [Badal]
v3:
- Added igt_aux_enable_pm_suspend_dbg() function doc. [Kmail]

Signed-off-by: Anshuman Gupta <anshuman.gupta@intel.com>
Reviewed-by: Badal Nilawar <badal.nilawar@intel.com>
---
 lib/igt_aux.c | 35 ++++++++++++++++++++++++++++-------
 1 file changed, 28 insertions(+), 7 deletions(-)

diff --git a/lib/igt_aux.c b/lib/igt_aux.c
index 5eb6d9e270..35263b4519 100644
--- a/lib/igt_aux.c
+++ b/lib/igt_aux.c
@@ -703,6 +703,7 @@ void igt_print_activity(void)
 
 static int autoresume_delay;
 bool __console_suspend_saved_state;
+bool __pm_debug_messages_state;
 
 #define SYSFS_MODULE_PRINTK "/sys/module/printk/parameters/"
 #define CONSOLE_SUSPEND_DISABLE false
@@ -913,7 +914,7 @@ static bool is_mem_sleep_state_supported(int power_dir, enum igt_mem_sleep state
 
 static void igt_aux_pm_suspend_dbg_restore_exit_handler(int sig)
 {
-	int sysfs_fd;
+	int sysfs_fd, power_dir;
 
 	sysfs_fd = open(SYSFS_MODULE_PRINTK, O_RDONLY);
 
@@ -922,17 +923,30 @@ static void igt_aux_pm_suspend_dbg_restore_exit_handler(int sig)
 
 	igt_sysfs_set_boolean(sysfs_fd, "console_suspend", __console_suspend_saved_state);
 	close(sysfs_fd);
+	power_dir = open("/sys/power", O_RDONLY);
+
+	if (power_dir <  0)
+		return;
+
+	if (!faccessat(power_dir, "pm_debug_messages", R_OK |  W_OK, 0))
+		igt_sysfs_set_boolean(power_dir, "pm_debug_messages", __pm_debug_messages_state);
+
+	close(power_dir);
 }
 
 /**
  * igt_aux_enable_pm_suspend_dbg:
+ * @power_dir: /sys/power/ dir fd
  *
  * Enhance the System wide suspend/resume debugging by,
- * disabling console suspend. Disabling console suspend dump the suspend/resume
- * logs over serial console. That will be useful to debug CI Suspend/Resume issues
- * tagged with 'Incomplete' result.
+ * disabling console suspend and enabling PM debug messages.
+ * Disabling console suspend dump the suspend/resume logs over serial console.
+ * That will be useful to debug CI Suspend/Resume issues tagged
+ * with 'Incomplete' result.
+ * pm_debug_messages sysfs enables Linux PM Core debug messages, which will
+ * be useful to debug system wide suspend/resume related issues.
  */
-static void igt_aux_enable_pm_suspend_dbg(void)
+static void igt_aux_enable_pm_suspend_dbg(int power_dir)
 {
 	int sysfs_fd;
 
@@ -943,11 +957,18 @@ static void igt_aux_enable_pm_suspend_dbg(void)
 		if (!igt_sysfs_set_boolean(sysfs_fd, "console_suspend", CONSOLE_SUSPEND_DISABLE))
 			igt_warn("Unable to disable console suspend\n");
 
-		igt_install_exit_handler(igt_aux_pm_suspend_dbg_restore_exit_handler);
 	} else {
 		igt_warn("Unable to open printk parameters Err:%d\n", errno);
 	}
 
+	/* pm_debug_messages depends on  CONFIG_PM_SLEEP_DEBUG */
+	if (!faccessat(power_dir, "pm_debug_messages", R_OK |  W_OK, 0)) {
+		__pm_debug_messages_state = igt_sysfs_get_boolean(sysfs_fd, "pm_debug_messages");
+		igt_sysfs_set_boolean(power_dir, "pm_debug_messages", true);
+	}
+
+	igt_install_exit_handler(igt_aux_pm_suspend_dbg_restore_exit_handler);
+
 	close(sysfs_fd);
 }
 
@@ -989,7 +1010,7 @@ void igt_system_suspend_autoresume(enum igt_suspend_state state,
 		      "Suspend to disk requires swap space.\n");
 
 	orig_test = get_suspend_test(power_dir);
-	igt_aux_enable_pm_suspend_dbg();
+	igt_aux_enable_pm_suspend_dbg(power_dir);
 
 	if (state == SUSPEND_STATE_S3) {
 		orig_mem_sleep = get_mem_sleep();
-- 
2.25.1

Re: [igt-dev] [PATCH i-g-t v4 2/2] lib/igt_aux: Enable PM Suspend dbg messages

[Dixit, Ashutosh]

On Mon, 26 Jun 2023 05:50:45 -0700, Anshuman Gupta wrote:
>

Hi Anshuman,

> Enabling PM Suspend dbg messages by turning on
> /sys/power/pm_debug_messages switch also adding an
> exit handler provision to restore the
> pm_debug_messages state.
>
> v2:
> - Fixed sysfs_fd leak. [Badal]
> v3:
> - Added igt_aux_enable_pm_suspend_dbg() function doc. [Kmail]
>
> Signed-off-by: Anshuman Gupta <anshuman.gupta@intel.com>
> Reviewed-by: Badal Nilawar <badal.nilawar@intel.com>
> ---
>  lib/igt_aux.c | 35 ++++++++++++++++++++++++++++-------
>  1 file changed, 28 insertions(+), 7 deletions(-)
>
> diff --git a/lib/igt_aux.c b/lib/igt_aux.c
> index 5eb6d9e270..35263b4519 100644
> --- a/lib/igt_aux.c
> +++ b/lib/igt_aux.c
> @@ -703,6 +703,7 @@ void igt_print_activity(void)
>
>  static int autoresume_delay;
>  bool __console_suspend_saved_state;
> +bool __pm_debug_messages_state;
>
>  #define SYSFS_MODULE_PRINTK "/sys/module/printk/parameters/"
>  #define CONSOLE_SUSPEND_DISABLE false
> @@ -913,7 +914,7 @@ static bool is_mem_sleep_state_supported(int power_dir, enum igt_mem_sleep state
>
>  static void igt_aux_pm_suspend_dbg_restore_exit_handler(int sig)
>  {
> -	int sysfs_fd;
> +	int sysfs_fd, power_dir;
>
>	sysfs_fd = open(SYSFS_MODULE_PRINTK, O_RDONLY);
>
> @@ -922,17 +923,30 @@ static void igt_aux_pm_suspend_dbg_restore_exit_handler(int sig)
>
>	igt_sysfs_set_boolean(sysfs_fd, "console_suspend", __console_suspend_saved_state);
>	close(sysfs_fd);

Maybe add an empty line here.

> +	power_dir = open("/sys/power", O_RDONLY);
> +

And delete this empty line.

> +	if (power_dir <  0)
> +		return;
> +
> +	if (!faccessat(power_dir, "pm_debug_messages", R_OK |  W_OK, 0))
> +		igt_sysfs_set_boolean(power_dir, "pm_debug_messages", __pm_debug_messages_state);
> +
> +	close(power_dir);
>  }
>
>  /**
>   * igt_aux_enable_pm_suspend_dbg:
> + * @power_dir: /sys/power/ dir fd
>   *
>   * Enhance the System wide suspend/resume debugging by,

No comma needed (it's from previous patch).

Apart from above nits, lgtm:

Reviewed-by: Ashutosh Dixit <ashutosh.dixit@intel.com>

[igt-dev] ✗ Fi.CI.BAT: failure for PM Suspend debug (rev5)

[Patchwork]

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== Series Details ==

Series: PM Suspend debug (rev5)
URL   : https://patchwork.freedesktop.org/series/119371/
State : failure

== Summary ==

CI Bug Log - changes from CI_DRM_13322 -> IGTPW_9255
====================================================

Summary
-------

  **FAILURE**

  Serious unknown changes coming with IGTPW_9255 absolutely need to be
  verified manually.
  
  If you think the reported changes have nothing to do with the changes
  introduced in IGTPW_9255, please notify your bug team to allow them
  to document this new failure mode, which will reduce false positives in CI.

  External URL: https://intel-gfx-ci.01.org/tree/drm-tip/IGTPW_9255/index.html

Participating hosts (42 -> 41)
------------------------------

  Missing    (1): fi-snb-2520m 

Possible new issues
-------------------

  Here are the unknown changes that may have been introduced in IGTPW_9255:

### IGT changes ###

#### Possible regressions ####

  * igt@kms_pipe_crc_basic@suspend-read-crc@pipe-c-vga-1:
    - fi-hsw-4770:        [PASS][1] -> [ABORT][2]
   [1]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_13322/fi-hsw-4770/igt@kms_pipe_crc_basic@suspend-read-crc@pipe-c-vga-1.html
   [2]: https://intel-gfx-ci.01.org/tree/drm-tip/IGTPW_9255/fi-hsw-4770/igt@kms_pipe_crc_basic@suspend-read-crc@pipe-c-vga-1.html

  
Known issues
------------

  Here are the changes found in IGTPW_9255 that come from known issues:

### IGT changes ###

#### Issues hit ####

  * igt@gem_exec_parallel@engines@userptr:
    - bat-mtlp-6:         [PASS][3] -> [FAIL][4] ([i915#8672])
   [3]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_13322/bat-mtlp-6/igt@gem_exec_parallel@engines@userptr.html
   [4]: https://intel-gfx-ci.01.org/tree/drm-tip/IGTPW_9255/bat-mtlp-6/igt@gem_exec_parallel@engines@userptr.html

  * igt@i915_module_load@load:
    - bat-adlp-11:        [PASS][5] -> [ABORT][6] ([i915#4423])
   [5]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_13322/bat-adlp-11/igt@i915_module_load@load.html
   [6]: https://intel-gfx-ci.01.org/tree/drm-tip/IGTPW_9255/bat-adlp-11/igt@i915_module_load@load.html

  * igt@i915_selftest@live@gt_heartbeat:
    - fi-glk-j4005:       [PASS][7] -> [DMESG-FAIL][8] ([i915#5334])
   [7]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_13322/fi-glk-j4005/igt@i915_selftest@live@gt_heartbeat.html
   [8]: https://intel-gfx-ci.01.org/tree/drm-tip/IGTPW_9255/fi-glk-j4005/igt@i915_selftest@live@gt_heartbeat.html

  * igt@i915_selftest@live@gt_mocs:
    - bat-mtlp-6:         [PASS][9] -> [DMESG-FAIL][10] ([i915#7059])
   [9]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_13322/bat-mtlp-6/igt@i915_selftest@live@gt_mocs.html
   [10]: https://intel-gfx-ci.01.org/tree/drm-tip/IGTPW_9255/bat-mtlp-6/igt@i915_selftest@live@gt_mocs.html

  * igt@i915_selftest@live@requests:
    - bat-rpls-2:         [PASS][11] -> [ABORT][12] ([i915#4983] / [i915#7913])
   [11]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_13322/bat-rpls-2/igt@i915_selftest@live@requests.html
   [12]: https://intel-gfx-ci.01.org/tree/drm-tip/IGTPW_9255/bat-rpls-2/igt@i915_selftest@live@requests.html

  * igt@i915_selftest@live@slpc:
    - bat-mtlp-6:         [PASS][13] -> [DMESG-WARN][14] ([i915#6367])
   [13]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_13322/bat-mtlp-6/igt@i915_selftest@live@slpc.html
   [14]: https://intel-gfx-ci.01.org/tree/drm-tip/IGTPW_9255/bat-mtlp-6/igt@i915_selftest@live@slpc.html
    - bat-rpls-1:         NOTRUN -> [DMESG-WARN][15] ([i915#6367])
   [15]: https://intel-gfx-ci.01.org/tree/drm-tip/IGTPW_9255/bat-rpls-1/igt@i915_selftest@live@slpc.html

  * igt@i915_suspend@basic-s3-without-i915:
    - bat-rpls-1:         NOTRUN -> [ABORT][16] ([i915#6687] / [i915#7978])
   [16]: https://intel-gfx-ci.01.org/tree/drm-tip/IGTPW_9255/bat-rpls-1/igt@i915_suspend@basic-s3-without-i915.html

  * igt@kms_chamelium_hpd@common-hpd-after-suspend:
    - bat-dg2-11:         NOTRUN -> [SKIP][17] ([i915#7828])
   [17]: https://intel-gfx-ci.01.org/tree/drm-tip/IGTPW_9255/bat-dg2-11/igt@kms_chamelium_hpd@common-hpd-after-suspend.html

  
#### Possible fixes ####

  * igt@gem_basic@create-close:
    - fi-kbl-soraka:      [INCOMPLETE][18] -> [PASS][19]
   [18]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_13322/fi-kbl-soraka/igt@gem_basic@create-close.html
   [19]: https://intel-gfx-ci.01.org/tree/drm-tip/IGTPW_9255/fi-kbl-soraka/igt@gem_basic@create-close.html

  * igt@i915_selftest@live@gt_heartbeat:
    - fi-kbl-soraka:      [DMESG-FAIL][20] ([i915#5334] / [i915#7872]) -> [PASS][21]
   [20]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_13322/fi-kbl-soraka/igt@i915_selftest@live@gt_heartbeat.html
   [21]: https://intel-gfx-ci.01.org/tree/drm-tip/IGTPW_9255/fi-kbl-soraka/igt@i915_selftest@live@gt_heartbeat.html

  * igt@i915_selftest@live@gt_mocs:
    - bat-mtlp-8:         [DMESG-FAIL][22] ([i915#7059]) -> [PASS][23]
   [22]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_13322/bat-mtlp-8/igt@i915_selftest@live@gt_mocs.html
   [23]: https://intel-gfx-ci.01.org/tree/drm-tip/IGTPW_9255/bat-mtlp-8/igt@i915_selftest@live@gt_mocs.html

  * igt@i915_selftest@live@hangcheck:
    - bat-dg2-11:         [INCOMPLETE][24] ([i915#7913]) -> [PASS][25]
   [24]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_13322/bat-dg2-11/igt@i915_selftest@live@hangcheck.html
   [25]: https://intel-gfx-ci.01.org/tree/drm-tip/IGTPW_9255/bat-dg2-11/igt@i915_selftest@live@hangcheck.html

  * igt@i915_selftest@live@requests:
    - bat-rpls-1:         [ABORT][26] ([i915#7911] / [i915#7920] / [i915#7982]) -> [PASS][27]
   [26]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_13322/bat-rpls-1/igt@i915_selftest@live@requests.html
   [27]: https://intel-gfx-ci.01.org/tree/drm-tip/IGTPW_9255/bat-rpls-1/igt@i915_selftest@live@requests.html

  
#### Warnings ####

  * igt@kms_psr@primary_page_flip:
    - bat-rplp-1:         [SKIP][28] ([i915#1072]) -> [ABORT][29] ([i915#8442])
   [28]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_13322/bat-rplp-1/igt@kms_psr@primary_page_flip.html
   [29]: https://intel-gfx-ci.01.org/tree/drm-tip/IGTPW_9255/bat-rplp-1/igt@kms_psr@primary_page_flip.html

  
  [i915#1072]: https://gitlab.freedesktop.org/drm/intel/issues/1072
  [i915#4423]: https://gitlab.freedesktop.org/drm/intel/issues/4423
  [i915#4983]: https://gitlab.freedesktop.org/drm/intel/issues/4983
  [i915#5334]: https://gitlab.freedesktop.org/drm/intel/issues/5334
  [i915#6367]: https://gitlab.freedesktop.org/drm/intel/issues/6367
  [i915#6687]: https://gitlab.freedesktop.org/drm/intel/issues/6687
  [i915#7059]: https://gitlab.freedesktop.org/drm/intel/issues/7059
  [i915#7828]: https://gitlab.freedesktop.org/drm/intel/issues/7828
  [i915#7872]: https://gitlab.freedesktop.org/drm/intel/issues/7872
  [i915#7911]: https://gitlab.freedesktop.org/drm/intel/issues/7911
  [i915#7913]: https://gitlab.freedesktop.org/drm/intel/issues/7913
  [i915#7920]: https://gitlab.freedesktop.org/drm/intel/issues/7920
  [i915#7978]: https://gitlab.freedesktop.org/drm/intel/issues/7978
  [i915#7982]: https://gitlab.freedesktop.org/drm/intel/issues/7982
  [i915#8442]: https://gitlab.freedesktop.org/drm/intel/issues/8442
  [i915#8672]: https://gitlab.freedesktop.org/drm/intel/issues/8672


Build changes
-------------

  * CI: CI-20190529 -> None
  * IGT: IGT_7349 -> IGTPW_9255

  CI-20190529: 20190529
  CI_DRM_13322: 7067d1a82560a2e79adefac0d28e08cb163ae907 @ git://anongit.freedesktop.org/gfx-ci/linux
  IGTPW_9255: https://intel-gfx-ci.01.org/tree/drm-tip/IGTPW_9255/index.html
  IGT_7349: eba3d515fbb832edc7fabcbf90e2564aa7face7b @ https://gitlab.freedesktop.org/drm/igt-gpu-tools.git

== Logs ==

For more details see: https://intel-gfx-ci.01.org/tree/drm-tip/IGTPW_9255/index.html

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