From: Sagar Arun Kamble <sagar.a.kamble@intel.com>
To: intel-gfx@lists.freedesktop.org
Subject: [RFC 0/4] GPU/CPU timestamps correlation for relating OA samples with system events
Date: Wed, 15 Nov 2017 17:43:50 +0530 [thread overview]
Message-ID: <1510748034-14034-1-git-send-email-sagar.a.kamble@intel.com> (raw)
We can compute system time corresponding to GPU timestamp by taking a
reference point (CPU monotonic time, GPU timestamp) and then adding
delta time computed using timecounter/cyclecounter support in kernel.
We have to configure cyclecounter with the GPU timestamp frequency.
Earlier approach that was based on cross-timestamp is not needed. It
was being used to approximate the frequency based on invalid assumptions
(possibly drift was being seen in the time due to precision issue).
The precision of time from GPU clocks is already in ns and timecounter
takes care of it as verified over variable durations.
This series adds base timecounter/cyclecounter changes and changes to
get GPU and CPU timestamps in OA samples.
Sagar Arun Kamble (1):
drm/i915/perf: Add support to correlate GPU timestamp with system time
Sourab Gupta (3):
drm/i915/perf: Add support for collecting 64 bit timestamps with OA
reports
drm/i915/perf: Extract raw GPU timestamps from OA reports
drm/i915/perf: Send system clock monotonic time in perf samples
drivers/gpu/drm/i915/i915_drv.h | 11 ++++
drivers/gpu/drm/i915/i915_perf.c | 124 ++++++++++++++++++++++++++++++++++++++-
drivers/gpu/drm/i915/i915_reg.h | 6 ++
include/uapi/drm/i915_drm.h | 14 +++++
4 files changed, 154 insertions(+), 1 deletion(-)
--
1.9.1
_______________________________________________
Intel-gfx mailing list
Intel-gfx@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/intel-gfx
next reply other threads:[~2017-11-15 12:10 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-11-15 12:13 Sagar Arun Kamble [this message]
2017-11-15 12:13 ` [RFC 1/4] drm/i915/perf: Add support to correlate GPU timestamp with system time Sagar Arun Kamble
2017-11-15 12:25 ` Chris Wilson
2017-11-15 16:41 ` Sagar Arun Kamble
2017-11-23 7:34 ` Creating cyclecounter and lock member in timecounter structure [ Was Re: [RFC 1/4] drm/i915/perf: Add support to correlate GPU timestamp with system time] Sagar Arun Kamble
2017-11-23 18:59 ` Thomas Gleixner
2017-11-24 9:06 ` Sagar Arun Kamble
2017-11-24 13:31 ` Thomas Gleixner
2017-11-27 10:05 ` Sagar Arun Kamble
2017-11-27 10:05 ` Sagar Arun Kamble
[not found] ` <63a2a495-1bdb-5d47-1202-9b538e9601d8-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2017-11-30 21:03 ` Saeed Mahameed
2017-11-30 21:03 ` Saeed Mahameed
[not found] ` <CALzJLG9JXOnr3EQ2zLcmwKx8S9-CGONRRBSAd9XwHdemEgOn2A-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2017-12-01 7:42 ` Sagar Arun Kamble
2017-12-01 7:42 ` Sagar Arun Kamble
2017-12-05 13:58 ` [RFC 1/4] drm/i915/perf: Add support to correlate GPU timestamp with system time Lionel Landwerlin
2017-12-06 8:17 ` Sagar Arun Kamble
2017-11-15 12:13 ` [RFC 2/4] drm/i915/perf: Add support for collecting 64 bit timestamps with OA reports Sagar Arun Kamble
2017-12-06 16:01 ` Lionel Landwerlin
2017-12-21 8:38 ` Sagar Arun Kamble
2017-11-15 12:13 ` [RFC 3/4] drm/i915/perf: Extract raw GPU timestamps from " Sagar Arun Kamble
2017-12-06 19:55 ` Lionel Landwerlin
2017-12-21 8:50 ` Sagar Arun Kamble
2017-11-15 12:13 ` [RFC 4/4] drm/i915/perf: Send system clock monotonic time in perf samples Sagar Arun Kamble
2017-11-15 12:31 ` Chris Wilson
2017-11-15 16:51 ` Sagar Arun Kamble
2017-11-15 17:54 ` Sagar Arun Kamble
2017-12-05 14:22 ` Lionel Landwerlin
2017-12-06 8:31 ` Sagar Arun Kamble
2017-11-15 12:30 ` ✗ Fi.CI.BAT: warning for GPU/CPU timestamps correlation for relating OA samples with system events Patchwork
2017-12-05 14:16 ` [RFC 0/4] " Lionel Landwerlin
2017-12-05 14:28 ` Robert Bragg
2017-12-05 14:37 ` Lionel Landwerlin
2017-12-06 9:01 ` Sagar Arun Kamble
2017-12-06 20:02 ` Lionel Landwerlin
2017-12-22 5:15 ` Sagar Arun Kamble
2017-12-22 5:26 ` Sagar Arun Kamble
2017-12-07 0:48 ` Robert Bragg
2017-12-07 0:57 ` Robert Bragg
2017-12-21 12:59 ` Lionel Landwerlin
2017-12-22 9:30 ` Sagar Arun Kamble
2017-12-22 10:16 ` Lionel Landwerlin
2017-12-26 5:32 ` Sagar Arun Kamble
2017-12-28 17:13 ` Lionel Landwerlin
2018-01-03 5:38 ` Sagar Arun Kamble
2017-12-22 6:06 ` Sagar Arun Kamble
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1510748034-14034-1-git-send-email-sagar.a.kamble@intel.com \
--to=sagar.a.kamble@intel.com \
--cc=intel-gfx@lists.freedesktop.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.