Messages in this thread | | | From | Yicong Yang <> | Subject | [PATCH 0/4] Improve PTT filter interface and some fixes | Date | Wed, 15 Mar 2023 17:43:12 +0800 |
| |
From: Yicong Yang <yangyicong@hisilicon.com>
This series tends to improve the PTT's filter interface in 2 aspects (Patch 2&3): - Support dynamically filter updating to response to hotplug Previous the supported filter list is settled down once the driver probed and it maybe out-of-date if hotplug events happen later. User need to reload the driver to update list. Patch 1/2 enable the driver to update the list by registering a PCI bus notifier and the filter list will always be the latest. - Export the available filters through sysfs Previous user needs to calculate the filters and filter value using device's BDF number, which requires the user to know the hardware well. Patch 3/3 tends to export the available filter information through sysfs attributes, the filter value will be gotten by reading the file. This will be more user friendly.
Also includes a fix and an improve. Patch 1 tends to only export the online CPUs supported by the PTT, this will make perf work properly when there's offline CPUs within the node PTT locates. Patch 4 tends to set proper PMU capability to avoid collecting unnecessary data to save the storage.
Yicong Yang (4): hwtracing: hisi_ptt: Make cpumask only present online CPUs hwtracing: hisi_ptt: Add support for dynamically updating the filter list hwtracing: hisi_ptt: Export available filters through sysfs hwtracing: hisi_ptt: Advertise PERF_PMU_CAP_NO_EXCLUDE for PTT PMU
.../ABI/testing/sysfs-devices-hisi_ptt | 50 +++ Documentation/trace/hisi-ptt.rst | 12 +- drivers/hwtracing/ptt/hisi_ptt.c | 396 +++++++++++++++++- drivers/hwtracing/ptt/hisi_ptt.h | 51 +++ 4 files changed, 498 insertions(+), 11 deletions(-)
-- 2.24.0
| |