[Intel-gfx] [PATCH] drm/i915/selftests: Bump the scheduling threshold for fast heartbeats

[Intel-gfx] [PATCH] drm/i915/selftests: Bump the scheduling threshold for fast heartbeats

[Chris Wilson]

Since we are system_highpri_wq, we expected the heartbeat to be
scheduled promptly. However, we see delays of over 10ms upsetting our
assertions. Accept this as inevitable and bump the error threshold to
20ms (from 6ms).

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
---
 drivers/gpu/drm/i915/gt/selftest_engine_heartbeat.c | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/gt/selftest_engine_heartbeat.c b/drivers/gpu/drm/i915/gt/selftest_engine_heartbeat.c
index b88aa35ad75b..807c445f7c70 100644
--- a/drivers/gpu/drm/i915/gt/selftest_engine_heartbeat.c
+++ b/drivers/gpu/drm/i915/gt/selftest_engine_heartbeat.c
@@ -197,6 +197,7 @@ static int cmp_u32(const void *_a, const void *_b)
 
 static int __live_heartbeat_fast(struct intel_engine_cs *engine)
 {
+	const int error_threshold = 20000; /* microseconds */
 	struct intel_context *ce;
 	struct i915_request *rq;
 	ktime_t t0, t1;
@@ -254,12 +255,18 @@ static int __live_heartbeat_fast(struct intel_engine_cs *engine)
 		times[0],
 		times[ARRAY_SIZE(times) - 1]);
 
-	/* Min work delay is 2 * 2 (worst), +1 for scheduling, +1 for slack */
-	if (times[ARRAY_SIZE(times) / 2] > jiffies_to_usecs(6)) {
+	/*
+	 * Ideally, the upper bound on min work delay would be something like
+	 * 2 * 2 (worst), +1 for scheduling, +1 for slack. In practice, we
+	 * are, even with system_wq_highpri, at the mercy of the CPU scheduler
+	 * and may be stuck behind some slow work for many millisecond. Such
+	 * as our very own display workers.
+	 */
+	if (times[ARRAY_SIZE(times) / 2] > error_threshold) {
 		pr_err("%s: Heartbeat delay was %uus, expected less than %dus\n",
 		       engine->name,
 		       times[ARRAY_SIZE(times) / 2],
-		       jiffies_to_usecs(6));
+		       error_threshold);
 		err = -EINVAL;
 	}
 
-- 
2.20.1

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[Intel-gfx] [PATCH] drm/i915/selftests: Bump the scheduling threshold for fast heartbeats

[Chris Wilson]

Since we are system_highpri_wq, we expected the heartbeat to be
scheduled promptly. However, we see delays of over 10ms upsetting our
assertions. Accept this as inevitable and bump the error threshold to
20ms (from 6ms).

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
---
 drivers/gpu/drm/i915/gt/selftest_engine_heartbeat.c | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/gt/selftest_engine_heartbeat.c b/drivers/gpu/drm/i915/gt/selftest_engine_heartbeat.c
index b88aa35ad75b..e88a01390dc5 100644
--- a/drivers/gpu/drm/i915/gt/selftest_engine_heartbeat.c
+++ b/drivers/gpu/drm/i915/gt/selftest_engine_heartbeat.c
@@ -197,6 +197,7 @@ static int cmp_u32(const void *_a, const void *_b)
 
 static int __live_heartbeat_fast(struct intel_engine_cs *engine)
 {
+	const int error_threshold = max(20000, jffies_to_usecs(6));
 	struct intel_context *ce;
 	struct i915_request *rq;
 	ktime_t t0, t1;
@@ -254,12 +255,18 @@ static int __live_heartbeat_fast(struct intel_engine_cs *engine)
 		times[0],
 		times[ARRAY_SIZE(times) - 1]);
 
-	/* Min work delay is 2 * 2 (worst), +1 for scheduling, +1 for slack */
-	if (times[ARRAY_SIZE(times) / 2] > jiffies_to_usecs(6)) {
+	/*
+	 * Ideally, the upper bound on min work delay would be something like
+	 * 2 * 2 (worst), +1 for scheduling, +1 for slack. In practice, we
+	 * are, even with system_wq_highpri, at the mercy of the CPU scheduler
+	 * and may be stuck behind some slow work for many millisecond. Such
+	 * as our very own display workers.
+	 */
+	if (times[ARRAY_SIZE(times) / 2] > error_threshold) {
 		pr_err("%s: Heartbeat delay was %uus, expected less than %dus\n",
 		       engine->name,
 		       times[ARRAY_SIZE(times) / 2],
-		       jiffies_to_usecs(6));
+		       error_threshold);
 		err = -EINVAL;
 	}
 
-- 
2.20.1

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Re: [Intel-gfx] [PATCH] drm/i915/selftests: Bump the scheduling threshold for fast heartbeats

[Mika Kuoppala]

Chris Wilson <chris@chris-wilson.co.uk> writes:

> Since we are system_highpri_wq, we expected the heartbeat to be
> scheduled promptly. However, we see delays of over 10ms upsetting our
> assertions. Accept this as inevitable and bump the error threshold to
> 20ms (from 6ms).
>
> Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
> ---
>  drivers/gpu/drm/i915/gt/selftest_engine_heartbeat.c | 13 ++++++++++---
>  1 file changed, 10 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/gt/selftest_engine_heartbeat.c b/drivers/gpu/drm/i915/gt/selftest_engine_heartbeat.c
> index b88aa35ad75b..e88a01390dc5 100644
> --- a/drivers/gpu/drm/i915/gt/selftest_engine_heartbeat.c
> +++ b/drivers/gpu/drm/i915/gt/selftest_engine_heartbeat.c
> @@ -197,6 +197,7 @@ static int cmp_u32(const void *_a, const void *_b)
>  
>  static int __live_heartbeat_fast(struct intel_engine_cs *engine)
>  {
> +	const int error_threshold = max(20000, jffies_to_usecs(6));

s/jffies/jiffies

Also for the commit message, 6 jiffies are not 6ms so it needs
some mending.

-Mika

>  	struct intel_context *ce;
>  	struct i915_request *rq;
>  	ktime_t t0, t1;
> @@ -254,12 +255,18 @@ static int __live_heartbeat_fast(struct intel_engine_cs *engine)
>  		times[0],
>  		times[ARRAY_SIZE(times) - 1]);
>  
> -	/* Min work delay is 2 * 2 (worst), +1 for scheduling, +1 for slack */
> -	if (times[ARRAY_SIZE(times) / 2] > jiffies_to_usecs(6)) {
> +	/*
> +	 * Ideally, the upper bound on min work delay would be something like
> +	 * 2 * 2 (worst), +1 for scheduling, +1 for slack. In practice, we
> +	 * are, even with system_wq_highpri, at the mercy of the CPU scheduler
> +	 * and may be stuck behind some slow work for many millisecond. Such
> +	 * as our very own display workers.
> +	 */
> +	if (times[ARRAY_SIZE(times) / 2] > error_threshold) {
>  		pr_err("%s: Heartbeat delay was %uus, expected less than %dus\n",
>  		       engine->name,
>  		       times[ARRAY_SIZE(times) / 2],
> -		       jiffies_to_usecs(6));
> +		       error_threshold);
>  		err = -EINVAL;
>  	}
>  
> -- 
> 2.20.1
>
> _______________________________________________
> Intel-gfx mailing list
> Intel-gfx@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/intel-gfx
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Re: [Intel-gfx] [PATCH] drm/i915/selftests: Bump the scheduling threshold for fast heartbeats

[Chris Wilson]

Quoting Mika Kuoppala (2021-01-13 14:13:57)
> Chris Wilson <chris@chris-wilson.co.uk> writes:
> 
> > Since we are system_highpri_wq, we expected the heartbeat to be
> > scheduled promptly. However, we see delays of over 10ms upsetting our
> > assertions. Accept this as inevitable and bump the error threshold to
> > 20ms (from 6ms).
> >
> > Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
> > ---
> >  drivers/gpu/drm/i915/gt/selftest_engine_heartbeat.c | 13 ++++++++++---
> >  1 file changed, 10 insertions(+), 3 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/i915/gt/selftest_engine_heartbeat.c b/drivers/gpu/drm/i915/gt/selftest_engine_heartbeat.c
> > index b88aa35ad75b..e88a01390dc5 100644
> > --- a/drivers/gpu/drm/i915/gt/selftest_engine_heartbeat.c
> > +++ b/drivers/gpu/drm/i915/gt/selftest_engine_heartbeat.c
> > @@ -197,6 +197,7 @@ static int cmp_u32(const void *_a, const void *_b)
> >  
> >  static int __live_heartbeat_fast(struct intel_engine_cs *engine)
> >  {
> > +     const int error_threshold = max(20000, jffies_to_usecs(6));
> 
> s/jffies/jiffies
> 
> Also for the commit message, 6 jiffies are not 6ms so it needs
> some mending.

Ok, might as well pull the failure messages from CI as well for a bit
more information.
-Chris
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[Intel-gfx] ✗ Fi.CI.BUILD: failure for drm/i915/selftests: Bump the scheduling threshold for fast heartbeats (rev2)

[Patchwork]

== Series Details ==

Series: drm/i915/selftests: Bump the scheduling threshold for fast heartbeats (rev2)
URL   : https://patchwork.freedesktop.org/series/85804/
State : failure

== Summary ==

CALL    scripts/checksyscalls.sh
  CALL    scripts/atomic/check-atomics.sh
  DESCEND  objtool
  CHK     include/generated/compile.h
  CC [M]  drivers/gpu/drm/i915/gt/intel_engine_heartbeat.o
In file included from ./include/linux/kernel.h:14,
                 from ./include/asm-generic/bug.h:20,
                 from ./arch/x86/include/asm/bug.h:93,
                 from ./include/linux/bug.h:5,
                 from ./include/linux/mmdebug.h:5,
                 from ./include/linux/gfp.h:5,
                 from ./include/linux/slab.h:15,
                 from ./include/linux/io-mapping.h:10,
                 from ./drivers/gpu/drm/i915/i915_drv.h:38,
                 from drivers/gpu/drm/i915/gt/intel_engine_heartbeat.c:7:
drivers/gpu/drm/i915/gt/selftest_engine_heartbeat.c: In function ‘__live_heartbeat_fast’:
drivers/gpu/drm/i915/gt/selftest_engine_heartbeat.c:200:41: error: implicit declaration of function ‘jffies_to_usecs’; did you mean ‘jiffies_to_usecs’? [-Werror=implicit-function-declaration]
  const int error_threshold = max(20000, jffies_to_usecs(6));
                                         ^~~~~~~~~~~~~~~
./include/linux/minmax.h:18:39: note: in definition of macro ‘__typecheck’
  (!!(sizeof((typeof(x) *)1 == (typeof(y) *)1)))
                                       ^
./include/linux/minmax.h:42:24: note: in expansion of macro ‘__safe_cmp’
  __builtin_choose_expr(__safe_cmp(x, y), \
                        ^~~~~~~~~~
./include/linux/minmax.h:58:19: note: in expansion of macro ‘__careful_cmp’
 #define max(x, y) __careful_cmp(x, y, >)
                   ^~~~~~~~~~~~~
drivers/gpu/drm/i915/gt/selftest_engine_heartbeat.c:200:30: note: in expansion of macro ‘max’
  const int error_threshold = max(20000, jffies_to_usecs(6));
                              ^~~
cc1: all warnings being treated as errors
scripts/Makefile.build:279: recipe for target 'drivers/gpu/drm/i915/gt/intel_engine_heartbeat.o' failed
make[4]: *** [drivers/gpu/drm/i915/gt/intel_engine_heartbeat.o] Error 1
scripts/Makefile.build:496: recipe for target 'drivers/gpu/drm/i915' failed
make[3]: *** [drivers/gpu/drm/i915] Error 2
scripts/Makefile.build:496: recipe for target 'drivers/gpu/drm' failed
make[2]: *** [drivers/gpu/drm] Error 2
scripts/Makefile.build:496: recipe for target 'drivers/gpu' failed
make[1]: *** [drivers/gpu] Error 2
Makefile:1805: recipe for target 'drivers' failed
make: *** [drivers] Error 2


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[Intel-gfx] [PATCH v2] drm/i915/selftests: Bump the scheduling error threshold for fast heartbeats

[Chris Wilson]

Since we are system_highpri_wq, we expected the heartbeat to be
scheduled promptly. However, we see delays of over 10ms upsetting our
assertions. Accept this as inevitable and bump the minimum error
threshold to 20ms (from 6 jiffies).

<6> [616.784749] rcs0: Heartbeat delay: 3570us [2802, 9188]
<6> [616.807790] bcs0: Heartbeat delay: 2111us [745, 4372]
<6> [616.853776] vcs0: Heartbeat delay: 6485us [2424, 11637]
<3> [616.859296] vcs0: Heartbeat delay was 6485us, expected less than 6000us
<3> [616.860901] i915/intel_heartbeat_live_selftests: live_heartbeat_fast failed with error -22

v2: More context from CI.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
---
 drivers/gpu/drm/i915/gt/selftest_engine_heartbeat.c | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/gt/selftest_engine_heartbeat.c b/drivers/gpu/drm/i915/gt/selftest_engine_heartbeat.c
index b88aa35ad75b..223ab88f7e57 100644
--- a/drivers/gpu/drm/i915/gt/selftest_engine_heartbeat.c
+++ b/drivers/gpu/drm/i915/gt/selftest_engine_heartbeat.c
@@ -197,6 +197,7 @@ static int cmp_u32(const void *_a, const void *_b)
 
 static int __live_heartbeat_fast(struct intel_engine_cs *engine)
 {
+	const unsigned int error_threshold = max(20000u, jiffies_to_usecs(6));
 	struct intel_context *ce;
 	struct i915_request *rq;
 	ktime_t t0, t1;
@@ -254,12 +255,18 @@ static int __live_heartbeat_fast(struct intel_engine_cs *engine)
 		times[0],
 		times[ARRAY_SIZE(times) - 1]);
 
-	/* Min work delay is 2 * 2 (worst), +1 for scheduling, +1 for slack */
-	if (times[ARRAY_SIZE(times) / 2] > jiffies_to_usecs(6)) {
+	/*
+	 * Ideally, the upper bound on min work delay would be something like
+	 * 2 * 2 (worst), +1 for scheduling, +1 for slack. In practice, we
+	 * are, even with system_wq_highpri, at the mercy of the CPU scheduler
+	 * and may be stuck behind some slow work for many millisecond. Such
+	 * as our very own display workers.
+	 */
+	if (times[ARRAY_SIZE(times) / 2] > error_threshold) {
 		pr_err("%s: Heartbeat delay was %uus, expected less than %dus\n",
 		       engine->name,
 		       times[ARRAY_SIZE(times) / 2],
-		       jiffies_to_usecs(6));
+		       error_threshold);
 		err = -EINVAL;
 	}
 
-- 
2.20.1

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Re: [Intel-gfx] [PATCH v2] drm/i915/selftests: Bump the scheduling error threshold for fast heartbeats

[Mika Kuoppala]

Chris Wilson <chris@chris-wilson.co.uk> writes:

> Since we are system_highpri_wq, we expected the heartbeat to be
> scheduled promptly. However, we see delays of over 10ms upsetting our
> assertions. Accept this as inevitable and bump the minimum error
> threshold to 20ms (from 6 jiffies).
>
> <6> [616.784749] rcs0: Heartbeat delay: 3570us [2802, 9188]
> <6> [616.807790] bcs0: Heartbeat delay: 2111us [745, 4372]
> <6> [616.853776] vcs0: Heartbeat delay: 6485us [2424, 11637]
> <3> [616.859296] vcs0: Heartbeat delay was 6485us, expected less than 6000us
> <3> [616.860901] i915/intel_heartbeat_live_selftests: live_heartbeat_fast failed with error -22
>
> v2: More context from CI.
>
> Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
> Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>

Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>

> ---
>  drivers/gpu/drm/i915/gt/selftest_engine_heartbeat.c | 13 ++++++++++---
>  1 file changed, 10 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/gt/selftest_engine_heartbeat.c b/drivers/gpu/drm/i915/gt/selftest_engine_heartbeat.c
> index b88aa35ad75b..223ab88f7e57 100644
> --- a/drivers/gpu/drm/i915/gt/selftest_engine_heartbeat.c
> +++ b/drivers/gpu/drm/i915/gt/selftest_engine_heartbeat.c
> @@ -197,6 +197,7 @@ static int cmp_u32(const void *_a, const void *_b)
>  
>  static int __live_heartbeat_fast(struct intel_engine_cs *engine)
>  {
> +	const unsigned int error_threshold = max(20000u, jiffies_to_usecs(6));
>  	struct intel_context *ce;
>  	struct i915_request *rq;
>  	ktime_t t0, t1;
> @@ -254,12 +255,18 @@ static int __live_heartbeat_fast(struct intel_engine_cs *engine)
>  		times[0],
>  		times[ARRAY_SIZE(times) - 1]);
>  
> -	/* Min work delay is 2 * 2 (worst), +1 for scheduling, +1 for slack */
> -	if (times[ARRAY_SIZE(times) / 2] > jiffies_to_usecs(6)) {
> +	/*
> +	 * Ideally, the upper bound on min work delay would be something like
> +	 * 2 * 2 (worst), +1 for scheduling, +1 for slack. In practice, we
> +	 * are, even with system_wq_highpri, at the mercy of the CPU scheduler
> +	 * and may be stuck behind some slow work for many millisecond. Such
> +	 * as our very own display workers.
> +	 */
> +	if (times[ARRAY_SIZE(times) / 2] > error_threshold) {
>  		pr_err("%s: Heartbeat delay was %uus, expected less than %dus\n",
>  		       engine->name,
>  		       times[ARRAY_SIZE(times) / 2],
> -		       jiffies_to_usecs(6));
> +		       error_threshold);
>  		err = -EINVAL;
>  	}
>  
> -- 
> 2.20.1
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[Intel-gfx] ✗ Fi.CI.CHECKPATCH: warning for drm/i915/selftests: Bump the scheduling threshold for fast heartbeats (rev3)

[Patchwork]

== Series Details ==

Series: drm/i915/selftests: Bump the scheduling threshold for fast heartbeats (rev3)
URL   : https://patchwork.freedesktop.org/series/85804/
State : warning

== Summary ==

$ dim checkpatch origin/drm-tip
752b57baab51 drm/i915/selftests: Bump the scheduling error threshold for fast heartbeats
-:15: WARNING:COMMIT_LOG_LONG_LINE: Possible unwrapped commit description (prefer a maximum 75 chars per line)
#15: 
<3> [616.859296] vcs0: Heartbeat delay was 6485us, expected less than 6000us

total: 0 errors, 1 warnings, 0 checks, 28 lines checked


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[Intel-gfx] ✗ Fi.CI.BAT: failure for drm/i915/selftests: Bump the scheduling threshold for fast heartbeats (rev3)

[Patchwork]

[-- Attachment #1.1: Type: text/plain, Size: 5115 bytes --]

== Series Details ==

Series: drm/i915/selftests: Bump the scheduling threshold for fast heartbeats (rev3)
URL   : https://patchwork.freedesktop.org/series/85804/
State : failure

== Summary ==

CI Bug Log - changes from CI_DRM_9603 -> Patchwork_19339
====================================================

Summary
-------

  **FAILURE**

  Serious unknown changes coming with Patchwork_19339 absolutely need to be
  verified manually.
  
  If you think the reported changes have nothing to do with the changes
  introduced in Patchwork_19339, 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/Patchwork_19339/index.html

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

  Here are the unknown changes that may have been introduced in Patchwork_19339:

### IGT changes ###

#### Possible regressions ####

  * igt@kms_pipe_crc_basic@suspend-read-crc-pipe-a:
    - fi-snb-2600:        NOTRUN -> [DMESG-WARN][1]
   [1]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_19339/fi-snb-2600/igt@kms_pipe_crc_basic@suspend-read-crc-pipe-a.html

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

  Here are the changes found in Patchwork_19339 that come from known issues:

### IGT changes ###

#### Issues hit ####

  * igt@amdgpu/amd_cs_nop@fork-gfx0:
    - fi-tgl-y:           NOTRUN -> [SKIP][2] ([fdo#109315] / [i915#2575]) +13 similar issues
   [2]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_19339/fi-tgl-y/igt@amdgpu/amd_cs_nop@fork-gfx0.html

  * igt@i915_pm_rpm@module-reload:
    - fi-kbl-guc:         [PASS][3] -> [SKIP][4] ([fdo#109271])
   [3]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_9603/fi-kbl-guc/igt@i915_pm_rpm@module-reload.html
   [4]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_19339/fi-kbl-guc/igt@i915_pm_rpm@module-reload.html

  * igt@kms_addfb_basic@addfb25-y-tiled-small-legacy:
    - fi-snb-2600:        NOTRUN -> [SKIP][5] ([fdo#109271]) +4 similar issues
   [5]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_19339/fi-snb-2600/igt@kms_addfb_basic@addfb25-y-tiled-small-legacy.html

  * igt@kms_chamelium@hdmi-crc-fast:
    - fi-snb-2600:        NOTRUN -> [SKIP][6] ([fdo#109271] / [fdo#111827]) +8 similar issues
   [6]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_19339/fi-snb-2600/igt@kms_chamelium@hdmi-crc-fast.html

  * igt@prime_self_import@basic-with_two_bos:
    - fi-tgl-y:           [PASS][7] -> [DMESG-WARN][8] ([i915#402]) +2 similar issues
   [7]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_9603/fi-tgl-y/igt@prime_self_import@basic-with_two_bos.html
   [8]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_19339/fi-tgl-y/igt@prime_self_import@basic-with_two_bos.html

  
#### Possible fixes ####

  * igt@gem_exec_suspend@basic-s3:
    - fi-snb-2600:        [DMESG-WARN][9] ([i915#2772]) -> [PASS][10]
   [9]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_9603/fi-snb-2600/igt@gem_exec_suspend@basic-s3.html
   [10]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_19339/fi-snb-2600/igt@gem_exec_suspend@basic-s3.html

  * igt@i915_selftest@live@gt_heartbeat:
    - fi-kbl-soraka:      [DMESG-FAIL][11] ([i915#2291] / [i915#541]) -> [PASS][12]
   [11]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_9603/fi-kbl-soraka/igt@i915_selftest@live@gt_heartbeat.html
   [12]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_19339/fi-kbl-soraka/igt@i915_selftest@live@gt_heartbeat.html

  * igt@prime_vgem@basic-userptr:
    - fi-tgl-y:           [DMESG-WARN][13] ([i915#402]) -> [PASS][14] +2 similar issues
   [13]: https://intel-gfx-ci.01.org/tree/drm-tip/CI_DRM_9603/fi-tgl-y/igt@prime_vgem@basic-userptr.html
   [14]: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_19339/fi-tgl-y/igt@prime_vgem@basic-userptr.html

  
  [fdo#109271]: https://bugs.freedesktop.org/show_bug.cgi?id=109271
  [fdo#109315]: https://bugs.freedesktop.org/show_bug.cgi?id=109315
  [fdo#111827]: https://bugs.freedesktop.org/show_bug.cgi?id=111827
  [i915#2291]: https://gitlab.freedesktop.org/drm/intel/issues/2291
  [i915#2575]: https://gitlab.freedesktop.org/drm/intel/issues/2575
  [i915#2772]: https://gitlab.freedesktop.org/drm/intel/issues/2772
  [i915#402]: https://gitlab.freedesktop.org/drm/intel/issues/402
  [i915#541]: https://gitlab.freedesktop.org/drm/intel/issues/541


Participating hosts (43 -> 39)
------------------------------

  Missing    (4): fi-ctg-p8600 fi-bsw-cyan fi-bdw-samus fi-hsw-4200u 


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

  * Linux: CI_DRM_9603 -> Patchwork_19339

  CI-20190529: 20190529
  CI_DRM_9603: 4e758db4f1c2fd3dcfa7bf1cd33a0863978f555c @ git://anongit.freedesktop.org/gfx-ci/linux
  IGT_5957: 2a2b3418f7458dfa1fac255cc5c71603f617690a @ git://anongit.freedesktop.org/xorg/app/intel-gpu-tools
  Patchwork_19339: 752b57baab511aee32157033aca29016930897b8 @ git://anongit.freedesktop.org/gfx-ci/linux


== Linux commits ==

752b57baab51 drm/i915/selftests: Bump the scheduling error threshold for fast heartbeats

== Logs ==

For more details see: https://intel-gfx-ci.01.org/tree/drm-tip/Patchwork_19339/index.html

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