Re: [PATCH v3 1/2] powerpc/xmon: Dump ftrace buffers for the current CPU only
From: Michael Ellerman <mpe@ellerman.id.au>
Date: 2017-08-14 11:31:58
Breno Leitao [off-list ref] writes:
Current xmon 'dt' command dumps the tracing buffer for all the CPUs, which makes it very hard to read due to the fact that most of powerpc machines currently have many CPUs.
Other than that, the CPU lines are interleaved in the ftrace log.
That's because they're ordered by time. And the CPU number is included in each line.
This new option just dumps the ftrace buffer for the current CPU.
This is still a good idea though :)
quoted hunk ↗ jump to hunk
diff --git a/arch/powerpc/xmon/xmon.c b/arch/powerpc/xmon/xmon.c index 08e367e3e8c3..e0522f60f0ee 100644 --- a/arch/powerpc/xmon/xmon.c +++ b/arch/powerpc/xmon/xmon.c@@ -234,6 +234,7 @@ Commands:\n\ "\ dr dump stream of raw bytes\n\ dt dump the tracing buffers (uses printk)\n\ + dtc dump the tracing buffers for current CPU (uses printk)\n\
Hopefully people won't be disappointed that this doesn't invoke dtc (Device Tree Compiler) in xmon :P cheers