Yicong Yang yangyicong@hisilicon.com writes:
The reason for not using perf is because there is no current support for uncore tracing in the perf facilities.
Not unless you count
$ perf list|grep -ic uncore 77
We have our own format of data and don't need perf doing the parsing.
Perf has AUX buffers, which are used for all kinds of own formats.
A similar approach for implementing this function is ETM, which use sysfs for configuring and a character device for dumping data.
And also perf. One reason ETM has a sysfs interface is because the driver predates perf's AUX buffers. Can't say if it's the only reason. I'm assuming you're talking about Coresight ETM.
Greg has some comments on our implementation and doesn't advocate to build driver on debugfs [1]. So I resend this series to collect more feedbacks on the implementation of this driver.
Hi perf and ETM related experts, is it suggested to adapt this driver to perf? Or is the debugfs approach acceptable? Otherwise use
Aside from the above, I don't think the use of debugfs for kernel ABIs is ever encouraged.
Regards, -- Ale