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Fri, 24 Jan 2025 01:24:33 -0800 (PST) X-Google-Smtp-Source: AGHT+IH6GuHaBDFQBkrxC7V9FqZvJrg5nmwyDueR/wvWOI/O0L3QgB5S4ky2Yf9wU46zstzCgz3eiw== X-Received: by 2002:a05:600c:5486:b0:434:f586:753c with SMTP id 5b1f17b1804b1-438913ca694mr271984695e9.7.1737710672734; Fri, 24 Jan 2025 01:24:32 -0800 (PST) Received: from gmonaco-thinkpadt14gen3.rmtit.csb ([185.107.56.30]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-438bd507c59sm19533345e9.17.2025.01.24.01.24.31 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 24 Jan 2025 01:24:32 -0800 (PST) Message-ID: <3568976320e31a90e36f7d2a17ec7d42e1f2f34a.camel@redhat.com> Subject: Re: [PATCH 4/4] rtla: Report missed event count From: Gabriele Monaco To: Tomas Glozar , Steven Rostedt Cc: linux-trace-kernel@vger.kernel.org, linux-kernel@vger.kernel.org, John Kacur , Luis Goncalves Date: Fri, 24 Jan 2025 10:24:29 +0100 In-Reply-To: <20250123142339.990300-5-tglozar@redhat.com> References: <20250123142339.990300-1-tglozar@redhat.com> <20250123142339.990300-5-tglozar@redhat.com> Autocrypt: addr=gmonaco@redhat.com; prefer-encrypt=mutual; keydata=mDMEZuK5YxYJKwYBBAHaRw8BAQdAmJ3dM9Sz6/Hodu33Qrf8QH2bNeNbOikqYtxWFLVm0 1a0JEdhYnJpZWxlIE1vbmFjbyA8Z21vbmFjb0ByZWRoYXQuY29tPoiZBBMWCgBBFiEEysoR+AuB3R Zwp6j270psSVh4TfIFAmbiuWMCGwMFCQWjmoAFCwkIBwICIgIGFQoJCAsCBBYCAwECHgcCF4AACgk Q70psSVh4TfJzZgD/TXjnqCyqaZH/Y2w+YVbvm93WX2eqBqiVZ6VEjTuGNs8A/iPrKbzdWC7AicnK xyhmqeUWOzFx5P43S1E1dhsrLWgP Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.54.3 (3.54.3-1.fc41) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 On Thu, 2025-01-23 at 15:23 +0100, Tomas Glozar wrote: > Print how many events were missed by trace buffer overflow in the > main > instance at the end of the run (for hist) or during the run (for > top). >=20 > Signed-off-by: Tomas Glozar > --- The patchset seems to work as expected, I get the number of dropped events and the percentage, of course if I let it run too long, I get unknown number. Tested on a 128 cores arm64 box with -p100, known to miss events: run for 5s 4611870 (24.12%) events missed, results might not be accurate run for 1m 104653605 (45.44%) events missed, results might not be accurate run for 5m 539717695 (46.85%) events missed, results might not be accurate run for 10m 1098569155 (47.68%) events missed, results might not be accurate run for 1h 6749574550 (48.83%) events missed, results might not be accurate Tested-by: Gabriele Monaco