From: Steven Rostedt <rostedt@goodmis.org>
To: Tomas Glozar <tglozar@redhat.com>
Cc: LKML <linux-kernel@vger.kernel.org>,
linux-trace-kernel <linux-trace-kernel@vger.kernel.org>
Subject: Re: [GIT PULL] RTLA changes for 7.3
Date: Mon, 10 Aug 2026 21:04:25 -0400 [thread overview]
Message-ID: <20260810210425.61435b0b@robin> (raw)
In-Reply-To: <20260805151055.870722-1-tglozar@redhat.com>
On Wed, 5 Aug 2026 17:10:55 +0200
Tomas Glozar <tglozar@redhat.com> wrote:
> Steven,
>
> The following changes since commit 075b74841bd0065a3bda3440873c747938e69b68:
>
> Linux 7.2-rc6 (2026-08-02 16:24:24 -0700)
>
> are available in the Git repository at:
>
> https://git.kernel.org/pub/scm/linux/kernel/git/tglozar/linux.git tags/rtla-v7.3
>
> for you to fetch changes up to 0ad45018ace734e3a21c8b15280df65b429135d1:
>
> rtla/cli: Unify and improve handling of invalid option arguments (2026-08-05 10:14:40 +0200)
I just tested this on my VM and have the following results from "make check":
Auto-detecting system features:
... libtraceevent: [ on ]
... libtracefs: [ on ]
... libcpupower: [ on ]
... libcheck: [ OFF ]
... libbpf: [ OFF ]
... clang-bpf-co-re: [ on ]
... bpftool-skeletons: [ on ]
libcheck is missing, building without unit tests support.
Please install check-devel/check
libbpf is missing, building without BPF skeleton support.
Please install libbpf-dev/libbpf-devel
[..]
tests/timerlat.t ..
1..75
[..]
not ok 20 - top verify -c/--cpus
# Output match failed: "^Affinity of threads: 0$"
# Affinity of threads:
# Timer Latency
# 0 00:00:04 | IRQ Timer Latency (us) | Thread Timer Latency (us) | Ret user Timer Latency (us)
# CPU COUNT | cur min avg max | cur min avg max | cur min avg max
# 0 #2 | 72 70 71 72 | 128 128 128 129 | 154 154 154 154
# ---------------|----------------------------------------|----------------------------------------|---------------------------------------
# ALL #2 e0 | 70 71 72 | 128 128 129 | 154 154 154
# timerlat hit stop tracing
# ## CPU 0 hit stop tracing, analyzing it ##
# IRQ handler delay: (exit from idle) 58.28 us (45.18 %)
# IRQ latency: 72.60 us
# Timerlat IRQ duration: 32.63 us (25.29 %)
# Blocking thread: 22.43 us (17.39 %)
# swapper/0:0 22.43 us
# ------------------------------------------------------------------------
# Thread latency: 129.00 us (100%)
#
# Max timerlat IRQ latency from idle: 72.60 us in cpu 0
#
# exit code 2
not ok 21 - hist verify -c/--cpus
# Output match failed: "^Affinity of threads: 0$"
# Affinity of threads:
# # RTLA timerlat histogram
# # Time unit is microseconds (us)
# # Duration: 0 00:00:03
# Index IRQ-000 Thr-000 Usr-000
# 80 1 0 0
# 81 1 0 0
# 139 0 2 0
# 165 0 0 1
# over: 0 0 0
# count: 2 2 1
# min: 80 139 165
# avg: 80 139 165
# max: 81 139 165
# ALL: IRQ Thr Usr
# count: 2 2 1
# min: 80 139 165
# avg: 80 139 165
# max: 81 139 165
# timerlat hit stop tracing
# ## CPU 0 hit stop tracing, analyzing it ##
# IRQ handler delay: (exit from idle) 67.05 us (48.08 %)
# IRQ latency: 81.97 us
# Timerlat IRQ duration: 33.38 us (23.94 %)
# Blocking thread: 22.95 us (16.46 %)
# swapper/0:0 22.95 us
# ------------------------------------------------------------------------
# Thread latency: 139.45 us (100%)
#
# Max timerlat IRQ latency from idle: 81.97 us in cpu 0
#
# exit code 2
ok 22 - top verify -H/--house-keeping
ok 23 - hist verify -H/--house-keeping
ok 24 - top verify -k/--kernel-threads
ok 25 - hist verify -k/--kernel-threads
not ok 26 - top verify -u/--user-threads
# Output match failed: "0 kernel threads, 1 user threads"
# 0 kernel threads, 0 user threads
# Timer Latency
# 0 00:00:04 | IRQ Timer Latency (us) | Thread Timer Latency (us) | Ret user Timer Latency (us)
# CPU COUNT | cur min avg max | cur min avg max | cur min avg max
# 0 #2 | 90 78 84 90 | 147 136 141 147 | 163 163 163 163
# ---------------|----------------------------------------|----------------------------------------|---------------------------------------
# ALL #2 e0 | 78 84 90 | 136 141 147 | 163 163 163
# timerlat hit stop tracing
# ## CPU 0 hit stop tracing, analyzing it ##
# IRQ handler delay: (exit from idle) 75.58 us (51.26 %)
# IRQ latency: 90.24 us
# Timerlat IRQ duration: 33.32 us (22.60 %)
# Blocking thread: 23.06 us (15.64 %)
# swapper/0:0 23.06 us
# ------------------------------------------------------------------------
# Thread latency: 147.46 us (100%)
#
# Max timerlat IRQ latency from idle: 90.24 us in cpu 0
#
# exit code 2
not ok 27 - hist verify -u/--user-threads
# Output match failed: "0 kernel threads, 1 user threads"
# 0 kernel threads, 0 user threads
# # RTLA timerlat histogram
# # Time unit is microseconds (us)
# # Duration: 0 00:00:05
# Index IRQ-000 Thr-000 Usr-000
# 75 1 0 0
# 83 1 0 0
# 133 0 1 0
# 140 0 1 0
# 160 0 0 1
# over: 0 0 0
# count: 2 2 1
# min: 75 133 160
# avg: 79 136 160
# max: 83 140 160
# ALL: IRQ Thr Usr
# count: 2 2 1
# min: 75 133 160
# avg: 79 136 160
# max: 83 140 160
# timerlat hit stop tracing
# ## CPU 0 hit stop tracing, analyzing it ##
# IRQ handler delay: (exit from idle) 68.78 us (48.91 %)
# IRQ latency: 83.35 us
# Timerlat IRQ duration: 33.13 us (23.56 %)
# Blocking thread: 22.89 us (16.28 %)
# swapper/0:0 22.89 us
# ------------------------------------------------------------------------
# Thread latency: 140.62 us (100%)
#
# Max timerlat IRQ latency from idle: 83.35 us in cpu 0
#
# exit code 2
[..]
-- Steve
next prev parent reply other threads:[~2026-08-11 1:04 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-08-05 15:10 [GIT PULL] RTLA changes for 7.3 Tomas Glozar
2026-08-11 1:04 ` Steven Rostedt [this message]
2026-08-11 7:22 ` Tomas Glozar
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