* [igt-dev] [PATCH i-g-t] i915/gem_exec_big: Only warn for the first sign of a pagefault
@ 2019-03-28 11:49 Chris Wilson
2019-03-28 12:45 ` [igt-dev] ✗ Fi.CI.BAT: failure for " Patchwork
` (3 more replies)
0 siblings, 4 replies; 5+ messages in thread
From: Chris Wilson @ 2019-03-28 11:49 UTC (permalink / raw)
To: intel-gfx; +Cc: igt-dev
We only need the warning once, not for the several thousand relocations
we try. The current execbuf implementation will set all presumed_offset
to -1 so this loop should quit on the first entry if we hit the
pagefault, but for the sake of completeness check all.
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=110269
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
---
tests/i915/gem_exec_big.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/tests/i915/gem_exec_big.c b/tests/i915/gem_exec_big.c
index 440136ee8..9da90ead6 100644
--- a/tests/i915/gem_exec_big.c
+++ b/tests/i915/gem_exec_big.c
@@ -169,8 +169,10 @@ static void execN(int fd, uint32_t handle, uint64_t batch_size, unsigned flags,
igt_permute_array(gem_reloc, nreloc, xchg_reloc);
gem_execbuf(fd, &execbuf);
- for (n = 0; n < nreloc; n++)
- igt_warn_on(gem_reloc[n].presumed_offset == -1);
+ for (n = 0; n < nreloc; n++) {
+ if (igt_warn_on(gem_reloc[n].presumed_offset == -1))
+ break;
+ }
if (use_64bit_relocs) {
for (n = 0; n < nreloc; n++) {
--
2.20.1
_______________________________________________
igt-dev mailing list
igt-dev@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/igt-dev
^ permalink raw reply related [flat|nested] 5+ messages in thread
* [igt-dev] ✗ Fi.CI.BAT: failure for i915/gem_exec_big: Only warn for the first sign of a pagefault
2019-03-28 11:49 [igt-dev] [PATCH i-g-t] i915/gem_exec_big: Only warn for the first sign of a pagefault Chris Wilson
@ 2019-03-28 12:45 ` Patchwork
2019-03-29 16:33 ` [igt-dev] ✓ Fi.CI.BAT: success " Patchwork
` (2 subsequent siblings)
3 siblings, 0 replies; 5+ messages in thread
From: Patchwork @ 2019-03-28 12:45 UTC (permalink / raw)
To: Chris Wilson; +Cc: igt-dev
== Series Details ==
Series: i915/gem_exec_big: Only warn for the first sign of a pagefault
URL : https://patchwork.freedesktop.org/series/58670/
State : failure
== Summary ==
CI Bug Log - changes from IGT_4911 -> IGTPW_2723
====================================================
Summary
-------
**FAILURE**
Serious unknown changes coming with IGTPW_2723 absolutely need to be
verified manually.
If you think the reported changes have nothing to do with the changes
introduced in IGTPW_2723, please notify your bug team to allow them
to document this new failure mode, which will reduce false positives in CI.
External URL: https://patchwork.freedesktop.org/api/1.0/series/58670/revisions/1/mbox/
Possible new issues
-------------------
Here are the unknown changes that may have been introduced in IGTPW_2723:
### IGT changes ###
#### Possible regressions ####
* igt@gem_exec_reloc@basic-cpu-read-active:
- fi-bsw-kefka: PASS -> FAIL
Known issues
------------
Here are the changes found in IGTPW_2723 that come from known issues:
### IGT changes ###
#### Issues hit ####
* igt@amdgpu/amd_cs_nop@sync-fork-compute0:
- fi-skl-6600u: NOTRUN -> SKIP [fdo#109271] +18
* igt@amdgpu/amd_cs_nop@sync-gfx0:
- fi-kbl-7567u: NOTRUN -> SKIP [fdo#109271] +33
* igt@gem_exec_basic@readonly-bsd2:
- fi-pnv-d510: NOTRUN -> SKIP [fdo#109271] +76
* igt@i915_selftest@live_execlists:
- fi-apl-guc: PASS -> INCOMPLETE [fdo#103927] / [fdo#109720]
* igt@kms_busy@basic-flip-c:
- fi-pnv-d510: NOTRUN -> SKIP [fdo#109271] / [fdo#109278]
* igt@kms_chamelium@hdmi-edid-read:
- fi-hsw-peppy: NOTRUN -> SKIP [fdo#109271] +46
* igt@kms_frontbuffer_tracking@basic:
- fi-hsw-peppy: NOTRUN -> DMESG-FAIL [fdo#102614] / [fdo#107814]
* igt@kms_pipe_crc_basic@suspend-read-crc-pipe-b:
- fi-byt-clapper: PASS -> FAIL [fdo#103191] / [fdo#107362]
* igt@runner@aborted:
- fi-apl-guc: NOTRUN -> FAIL [fdo#108622] / [fdo#109720]
#### Possible fixes ####
* igt@i915_selftest@live_contexts:
- fi-bdw-gvtdvm: DMESG-FAIL [fdo#110235 ] -> PASS
* igt@i915_selftest@live_uncore:
- fi-ivb-3770: DMESG-FAIL [fdo#110210] -> PASS
* igt@kms_busy@basic-flip-a:
- fi-gdg-551: FAIL [fdo#103182] -> PASS
* igt@kms_pipe_crc_basic@suspend-read-crc-pipe-a:
- fi-byt-clapper: FAIL [fdo#103191] / [fdo#107362] -> PASS
* igt@kms_pipe_crc_basic@suspend-read-crc-pipe-c:
- fi-skl-6600u: INCOMPLETE [fdo#104108] -> PASS
[fdo#102614]: https://bugs.freedesktop.org/show_bug.cgi?id=102614
[fdo#103182]: https://bugs.freedesktop.org/show_bug.cgi?id=103182
[fdo#103191]: https://bugs.freedesktop.org/show_bug.cgi?id=103191
[fdo#103927]: https://bugs.freedesktop.org/show_bug.cgi?id=103927
[fdo#104108]: https://bugs.freedesktop.org/show_bug.cgi?id=104108
[fdo#107362]: https://bugs.freedesktop.org/show_bug.cgi?id=107362
[fdo#107814]: https://bugs.freedesktop.org/show_bug.cgi?id=107814
[fdo#108622]: https://bugs.freedesktop.org/show_bug.cgi?id=108622
[fdo#109271]: https://bugs.freedesktop.org/show_bug.cgi?id=109271
[fdo#109278]: https://bugs.freedesktop.org/show_bug.cgi?id=109278
[fdo#109720]: https://bugs.freedesktop.org/show_bug.cgi?id=109720
[fdo#110210]: https://bugs.freedesktop.org/show_bug.cgi?id=110210
[fdo#110235 ]: https://bugs.freedesktop.org/show_bug.cgi?id=110235
Participating hosts (42 -> 40)
------------------------------
Additional (3): fi-kbl-7567u fi-hsw-peppy fi-pnv-d510
Missing (5): fi-kbl-soraka fi-ilk-m540 fi-hsw-4200u fi-bsw-cyan fi-bdw-samus
Build changes
-------------
* IGT: IGT_4911 -> IGTPW_2723
CI_DRM_5829: 32a1e283d330638d2e5de8f89a9ff7c8512b75e8 @ git://anongit.freedesktop.org/gfx-ci/linux
IGTPW_2723: https://intel-gfx-ci.01.org/tree/drm-tip/IGTPW_2723/
IGT_4911: d9fe699ea45406e279b78d1afdb4d57a205a3c99 @ git://anongit.freedesktop.org/xorg/app/intel-gpu-tools
== Logs ==
For more details see: https://intel-gfx-ci.01.org/tree/drm-tip/IGTPW_2723/
_______________________________________________
igt-dev mailing list
igt-dev@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/igt-dev
^ permalink raw reply [flat|nested] 5+ messages in thread
* [igt-dev] ✓ Fi.CI.BAT: success for i915/gem_exec_big: Only warn for the first sign of a pagefault
2019-03-28 11:49 [igt-dev] [PATCH i-g-t] i915/gem_exec_big: Only warn for the first sign of a pagefault Chris Wilson
2019-03-28 12:45 ` [igt-dev] ✗ Fi.CI.BAT: failure for " Patchwork
@ 2019-03-29 16:33 ` Patchwork
2019-03-29 19:18 ` [igt-dev] ✓ Fi.CI.IGT: " Patchwork
2019-04-04 11:14 ` [igt-dev] [PATCH i-g-t] " Tvrtko Ursulin
3 siblings, 0 replies; 5+ messages in thread
From: Patchwork @ 2019-03-29 16:33 UTC (permalink / raw)
To: Chris Wilson; +Cc: igt-dev
== Series Details ==
Series: i915/gem_exec_big: Only warn for the first sign of a pagefault
URL : https://patchwork.freedesktop.org/series/58670/
State : success
== Summary ==
CI Bug Log - changes from IGT_4911 -> IGTPW_2723
====================================================
Summary
-------
**SUCCESS**
No regressions found.
External URL: https://patchwork.freedesktop.org/api/1.0/series/58670/revisions/1/mbox/
Known issues
------------
Here are the changes found in IGTPW_2723 that come from known issues:
### IGT changes ###
#### Issues hit ####
* igt@amdgpu/amd_cs_nop@sync-fork-compute0:
- fi-skl-6600u: NOTRUN -> SKIP [fdo#109271] +18
* igt@amdgpu/amd_cs_nop@sync-gfx0:
- fi-kbl-7567u: NOTRUN -> SKIP [fdo#109271] +33
* igt@gem_exec_basic@readonly-bsd2:
- fi-pnv-d510: NOTRUN -> SKIP [fdo#109271] +76
* igt@gem_exec_reloc@basic-cpu-read-active:
- fi-bsw-kefka: PASS -> FAIL [fdo#110284]
* igt@i915_selftest@live_execlists:
- fi-apl-guc: PASS -> INCOMPLETE [fdo#103927] / [fdo#109720]
* igt@kms_busy@basic-flip-c:
- fi-pnv-d510: NOTRUN -> SKIP [fdo#109271] / [fdo#109278]
* igt@kms_chamelium@hdmi-edid-read:
- fi-hsw-peppy: NOTRUN -> SKIP [fdo#109271] +46
* igt@kms_frontbuffer_tracking@basic:
- fi-hsw-peppy: NOTRUN -> DMESG-FAIL [fdo#102614] / [fdo#107814]
* igt@kms_pipe_crc_basic@suspend-read-crc-pipe-b:
- fi-byt-clapper: PASS -> FAIL [fdo#103191] / [fdo#107362]
* igt@runner@aborted:
- fi-apl-guc: NOTRUN -> FAIL [fdo#108622] / [fdo#109720]
#### Possible fixes ####
* igt@i915_selftest@live_contexts:
- fi-bdw-gvtdvm: DMESG-FAIL [fdo#110235 ] -> PASS
* igt@i915_selftest@live_uncore:
- fi-ivb-3770: DMESG-FAIL [fdo#110210] -> PASS
* igt@kms_busy@basic-flip-a:
- fi-gdg-551: FAIL [fdo#103182] -> PASS
* igt@kms_pipe_crc_basic@suspend-read-crc-pipe-a:
- fi-byt-clapper: FAIL [fdo#103191] / [fdo#107362] -> PASS
* igt@kms_pipe_crc_basic@suspend-read-crc-pipe-c:
- fi-skl-6600u: INCOMPLETE [fdo#104108] -> PASS
[fdo#102614]: https://bugs.freedesktop.org/show_bug.cgi?id=102614
[fdo#103182]: https://bugs.freedesktop.org/show_bug.cgi?id=103182
[fdo#103191]: https://bugs.freedesktop.org/show_bug.cgi?id=103191
[fdo#103927]: https://bugs.freedesktop.org/show_bug.cgi?id=103927
[fdo#104108]: https://bugs.freedesktop.org/show_bug.cgi?id=104108
[fdo#107362]: https://bugs.freedesktop.org/show_bug.cgi?id=107362
[fdo#107814]: https://bugs.freedesktop.org/show_bug.cgi?id=107814
[fdo#108622]: https://bugs.freedesktop.org/show_bug.cgi?id=108622
[fdo#109271]: https://bugs.freedesktop.org/show_bug.cgi?id=109271
[fdo#109278]: https://bugs.freedesktop.org/show_bug.cgi?id=109278
[fdo#109720]: https://bugs.freedesktop.org/show_bug.cgi?id=109720
[fdo#110210]: https://bugs.freedesktop.org/show_bug.cgi?id=110210
[fdo#110235 ]: https://bugs.freedesktop.org/show_bug.cgi?id=110235
[fdo#110284]: https://bugs.freedesktop.org/show_bug.cgi?id=110284
Participating hosts (42 -> 40)
------------------------------
Additional (3): fi-kbl-7567u fi-hsw-peppy fi-pnv-d510
Missing (5): fi-kbl-soraka fi-ilk-m540 fi-hsw-4200u fi-bsw-cyan fi-bdw-samus
Build changes
-------------
* IGT: IGT_4911 -> IGTPW_2723
CI_DRM_5829: 32a1e283d330638d2e5de8f89a9ff7c8512b75e8 @ git://anongit.freedesktop.org/gfx-ci/linux
IGTPW_2723: https://intel-gfx-ci.01.org/tree/drm-tip/IGTPW_2723/
IGT_4911: d9fe699ea45406e279b78d1afdb4d57a205a3c99 @ git://anongit.freedesktop.org/xorg/app/intel-gpu-tools
== Logs ==
For more details see: https://intel-gfx-ci.01.org/tree/drm-tip/IGTPW_2723/
_______________________________________________
igt-dev mailing list
igt-dev@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/igt-dev
^ permalink raw reply [flat|nested] 5+ messages in thread
* [igt-dev] ✓ Fi.CI.IGT: success for i915/gem_exec_big: Only warn for the first sign of a pagefault
2019-03-28 11:49 [igt-dev] [PATCH i-g-t] i915/gem_exec_big: Only warn for the first sign of a pagefault Chris Wilson
2019-03-28 12:45 ` [igt-dev] ✗ Fi.CI.BAT: failure for " Patchwork
2019-03-29 16:33 ` [igt-dev] ✓ Fi.CI.BAT: success " Patchwork
@ 2019-03-29 19:18 ` Patchwork
2019-04-04 11:14 ` [igt-dev] [PATCH i-g-t] " Tvrtko Ursulin
3 siblings, 0 replies; 5+ messages in thread
From: Patchwork @ 2019-03-29 19:18 UTC (permalink / raw)
To: Chris Wilson; +Cc: igt-dev
== Series Details ==
Series: i915/gem_exec_big: Only warn for the first sign of a pagefault
URL : https://patchwork.freedesktop.org/series/58670/
State : success
== Summary ==
CI Bug Log - changes from IGT_4911_full -> IGTPW_2723_full
====================================================
Summary
-------
**SUCCESS**
No regressions found.
External URL: https://patchwork.freedesktop.org/api/1.0/series/58670/revisions/1/mbox/
Known issues
------------
Here are the changes found in IGTPW_2723_full that come from known issues:
### IGT changes ###
#### Issues hit ####
* igt@gem_ctx_isolation@bcs0-s3:
- shard-kbl: PASS -> INCOMPLETE [fdo#103665]
* igt@i915_pm_rpm@gem-execbuf-stress-extra-wait:
- shard-snb: NOTRUN -> SKIP [fdo#109271] +226
* igt@kms_atomic_transition@3x-modeset-transitions-fencing:
- shard-hsw: NOTRUN -> SKIP [fdo#109271] / [fdo#109278] +4
* igt@kms_atomic_transition@5x-modeset-transitions-fencing:
- shard-glk: NOTRUN -> SKIP [fdo#109271] / [fdo#109278] +2
* igt@kms_busy@extended-modeset-hang-newfb-with-reset-render-a:
- shard-hsw: PASS -> DMESG-WARN [fdo#110222]
- shard-kbl: PASS -> DMESG-WARN [fdo#110222]
* igt@kms_busy@extended-modeset-hang-newfb-with-reset-render-b:
- shard-snb: NOTRUN -> DMESG-WARN [fdo#110222] +2
* igt@kms_cursor_crc@cursor-256x85-onscreen:
- shard-glk: NOTRUN -> FAIL [fdo#103232] +1
* igt@kms_flip@flip-vs-suspend-interruptible:
- shard-apl: PASS -> DMESG-WARN [fdo#108566]
* igt@kms_frontbuffer_tracking@fbcpsr-2p-primscrn-spr-indfb-draw-render:
- shard-hsw: NOTRUN -> SKIP [fdo#109271] +49
* igt@kms_pipe_crc_basic@nonblocking-crc-pipe-e:
- shard-snb: NOTRUN -> SKIP [fdo#109271] / [fdo#109278] +28
* igt@kms_plane_alpha_blend@pipe-a-alpha-transparant-fb:
- shard-glk: NOTRUN -> FAIL [fdo#108145]
* igt@kms_rotation_crc@multiplane-rotation-cropping-top:
- shard-kbl: PASS -> FAIL [fdo#109016]
* igt@prime_nv_api@i915_nv_double_export:
- shard-glk: NOTRUN -> SKIP [fdo#109271] +35
#### Possible fixes ####
* igt@gem_create@create-clear:
- shard-hsw: INCOMPLETE [fdo#103540] -> PASS
* igt@kms_busy@extended-modeset-hang-newfb-render-b:
- shard-hsw: DMESG-WARN [fdo#110222] -> PASS
- shard-kbl: DMESG-WARN [fdo#110222] -> PASS
* igt@kms_busy@extended-modeset-hang-newfb-with-reset-render-a:
- shard-snb: DMESG-WARN [fdo#110222] -> PASS +1
* igt@kms_cursor_crc@cursor-128x128-dpms:
- shard-kbl: FAIL [fdo#103232] -> PASS
- shard-apl: FAIL [fdo#103232] -> PASS
* igt@kms_draw_crc@draw-method-xrgb8888-render-xtiled:
- shard-glk: FAIL [fdo#107791] -> PASS
* igt@kms_flip@flip-vs-expired-vblank-interruptible:
- shard-glk: FAIL [fdo#105363] -> PASS
* igt@kms_frontbuffer_tracking@fbc-2p-primscrn-shrfb-plflip-blt:
- shard-glk: FAIL [fdo#103167] -> PASS
* igt@kms_plane_alpha_blend@pipe-b-constant-alpha-max:
- shard-glk: FAIL [fdo#108145] -> PASS +1
- shard-apl: FAIL [fdo#108145] -> PASS
- shard-kbl: FAIL [fdo#108145] -> PASS
* igt@kms_setmode@basic:
- shard-apl: FAIL [fdo#99912] -> PASS
- shard-kbl: FAIL [fdo#99912] -> PASS
* igt@kms_vblank@pipe-a-ts-continuation-modeset:
- shard-apl: FAIL [fdo#104894] -> PASS
- shard-kbl: FAIL [fdo#104894] -> PASS
{name}: This element is suppressed. This means it is ignored when computing
the status of the difference (SUCCESS, WARNING, or FAILURE).
[fdo#103167]: https://bugs.freedesktop.org/show_bug.cgi?id=103167
[fdo#103232]: https://bugs.freedesktop.org/show_bug.cgi?id=103232
[fdo#103540]: https://bugs.freedesktop.org/show_bug.cgi?id=103540
[fdo#103665]: https://bugs.freedesktop.org/show_bug.cgi?id=103665
[fdo#104894]: https://bugs.freedesktop.org/show_bug.cgi?id=104894
[fdo#105363]: https://bugs.freedesktop.org/show_bug.cgi?id=105363
[fdo#107791]: https://bugs.freedesktop.org/show_bug.cgi?id=107791
[fdo#108145]: https://bugs.freedesktop.org/show_bug.cgi?id=108145
[fdo#108566]: https://bugs.freedesktop.org/show_bug.cgi?id=108566
[fdo#109016]: https://bugs.freedesktop.org/show_bug.cgi?id=109016
[fdo#109271]: https://bugs.freedesktop.org/show_bug.cgi?id=109271
[fdo#109278]: https://bugs.freedesktop.org/show_bug.cgi?id=109278
[fdo#110222]: https://bugs.freedesktop.org/show_bug.cgi?id=110222
[fdo#110279]: https://bugs.freedesktop.org/show_bug.cgi?id=110279
[fdo#99912]: https://bugs.freedesktop.org/show_bug.cgi?id=99912
Participating hosts (7 -> 5)
------------------------------
Missing (2): shard-skl shard-iclb
Build changes
-------------
* IGT: IGT_4911 -> IGTPW_2723
CI_DRM_5829: 32a1e283d330638d2e5de8f89a9ff7c8512b75e8 @ git://anongit.freedesktop.org/gfx-ci/linux
IGTPW_2723: https://intel-gfx-ci.01.org/tree/drm-tip/IGTPW_2723/
IGT_4911: d9fe699ea45406e279b78d1afdb4d57a205a3c99 @ git://anongit.freedesktop.org/xorg/app/intel-gpu-tools
== Logs ==
For more details see: https://intel-gfx-ci.01.org/tree/drm-tip/IGTPW_2723/
_______________________________________________
igt-dev mailing list
igt-dev@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/igt-dev
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [igt-dev] [PATCH i-g-t] i915/gem_exec_big: Only warn for the first sign of a pagefault
2019-03-28 11:49 [igt-dev] [PATCH i-g-t] i915/gem_exec_big: Only warn for the first sign of a pagefault Chris Wilson
` (2 preceding siblings ...)
2019-03-29 19:18 ` [igt-dev] ✓ Fi.CI.IGT: " Patchwork
@ 2019-04-04 11:14 ` Tvrtko Ursulin
3 siblings, 0 replies; 5+ messages in thread
From: Tvrtko Ursulin @ 2019-04-04 11:14 UTC (permalink / raw)
To: Chris Wilson, intel-gfx; +Cc: igt-dev
On 28/03/2019 11:49, Chris Wilson wrote:
> We only need the warning once, not for the several thousand relocations
> we try. The current execbuf implementation will set all presumed_offset
> to -1 so this loop should quit on the first entry if we hit the
> pagefault, but for the sake of completeness check all.
>
> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=110269
> Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
> ---
> tests/i915/gem_exec_big.c | 6 ++++--
> 1 file changed, 4 insertions(+), 2 deletions(-)
>
> diff --git a/tests/i915/gem_exec_big.c b/tests/i915/gem_exec_big.c
> index 440136ee8..9da90ead6 100644
> --- a/tests/i915/gem_exec_big.c
> +++ b/tests/i915/gem_exec_big.c
> @@ -169,8 +169,10 @@ static void execN(int fd, uint32_t handle, uint64_t batch_size, unsigned flags,
> igt_permute_array(gem_reloc, nreloc, xchg_reloc);
>
> gem_execbuf(fd, &execbuf);
> - for (n = 0; n < nreloc; n++)
> - igt_warn_on(gem_reloc[n].presumed_offset == -1);
> + for (n = 0; n < nreloc; n++) {
> + if (igt_warn_on(gem_reloc[n].presumed_offset == -1))
> + break;
> + }
>
> if (use_64bit_relocs) {
> for (n = 0; n < nreloc; n++) {
>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Regards,
Tvrtko
_______________________________________________
igt-dev mailing list
igt-dev@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/igt-dev
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2019-04-04 11:14 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2019-03-28 11:49 [igt-dev] [PATCH i-g-t] i915/gem_exec_big: Only warn for the first sign of a pagefault Chris Wilson
2019-03-28 12:45 ` [igt-dev] ✗ Fi.CI.BAT: failure for " Patchwork
2019-03-29 16:33 ` [igt-dev] ✓ Fi.CI.BAT: success " Patchwork
2019-03-29 19:18 ` [igt-dev] ✓ Fi.CI.IGT: " Patchwork
2019-04-04 11:14 ` [igt-dev] [PATCH i-g-t] " Tvrtko Ursulin
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