From: Yicong Yang <yangyicong@huawei.com>
To: <mathieu.poirier@linaro.org>, <suzuki.poulose@arm.com>,
<jonathan.cameron@huawei.com>, <corbet@lwn.net>,
<linux-kernel@vger.kernel.org>, <linux-doc@vger.kernel.org>
Cc: <alexander.shishkin@linux.intel.com>, <helgaas@kernel.org>,
<linux-pci@vger.kernel.org>, <prime.zeng@huawei.com>,
<linuxarm@huawei.com>, <yangyicong@hisilicon.com>
Subject: [PATCH v4 4/5] hwtracing: hisi_ptt: Advertise PERF_PMU_CAP_NO_EXCLUDE for PTT PMU
Date: Tue, 6 Jun 2023 22:22:43 +0800 [thread overview]
Message-ID: <20230606142244.10939-5-yangyicong@huawei.com> (raw)
In-Reply-To: <20230606142244.10939-1-yangyicong@huawei.com>
From: Yicong Yang <yangyicong@hisilicon.com>
The PTT trace collects PCIe TLP headers from the PCIe link and don't
have the ability to exclude certain context. It doesn't support itrace
as well. So only advertise PERF_PMU_CAP_NO_EXCLUDE. This will greatly
save the storage of final data. Tested tracing idle link for ~15s,
without this patch we'll collect ~28.682MB data for context related
information and with this patch it reduced to ~0.226MB.
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Yicong Yang <yangyicong@hisilicon.com>
---
drivers/hwtracing/ptt/hisi_ptt.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/hwtracing/ptt/hisi_ptt.c b/drivers/hwtracing/ptt/hisi_ptt.c
index 5c7e93e7705f..ff2c16efe5b1 100644
--- a/drivers/hwtracing/ptt/hisi_ptt.c
+++ b/drivers/hwtracing/ptt/hisi_ptt.c
@@ -1210,7 +1210,7 @@ static int hisi_ptt_register_pmu(struct hisi_ptt *hisi_ptt)
hisi_ptt->hisi_ptt_pmu = (struct pmu) {
.module = THIS_MODULE,
- .capabilities = PERF_PMU_CAP_EXCLUSIVE | PERF_PMU_CAP_ITRACE,
+ .capabilities = PERF_PMU_CAP_NO_EXCLUDE,
.task_ctx_nr = perf_sw_context,
.attr_groups = hisi_ptt_pmu_groups,
.event_init = hisi_ptt_pmu_event_init,
--
2.24.0
next prev parent reply other threads:[~2023-06-06 14:24 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-06-06 14:22 [PATCH v4 0/5] Improve PTT filter interface and some fixes Yicong Yang
2023-06-06 14:22 ` [PATCH v4 1/5] hwtracing: hisi_ptt: Factor out filter allocation and release operation Yicong Yang
2023-06-06 14:22 ` [PATCH v4 2/5] hwtracing: hisi_ptt: Add support for dynamically updating the filter list Yicong Yang
2023-06-06 16:40 ` Jonathan Cameron
2023-06-06 14:22 ` [PATCH v4 3/5] hwtracing: hisi_ptt: Export available filters through sysfs Yicong Yang
2023-06-06 16:46 ` Jonathan Cameron
2023-06-06 14:22 ` Yicong Yang [this message]
2023-06-19 13:00 ` [PATCH v4 4/5] hwtracing: hisi_ptt: Advertise PERF_PMU_CAP_NO_EXCLUDE for PTT PMU hejunhao
2023-06-20 9:09 ` Yicong Yang
2023-06-06 14:22 ` [PATCH v4 5/5] hwtracing: hisi_ptt: Fix potential sleep in atomic context Yicong Yang
2023-06-06 16:43 ` Jonathan Cameron
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