Messages in this thread | | | Date | Fri, 15 Nov 2013 16:42:13 +0000 | From | Will Deacon <> | Subject | Re: [PATCH 0/2] ARM64: perf: add support for the perf registers and dwarf unwinding |
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On Thu, Nov 14, 2013 at 11:04:04AM +0000, Sandeepa Prabhu wrote: > Hi Jean, > > I have applied this patchset on aarch64 upstream branch,cross-compiled > for arm64 and try running some tests for hardware breakpoints. > > I cross-compiled perf using linaro toolchain > "gcc-linaro-aarch64-linux-gnu-4.7-2013.04-20130415_linux" as > $ cd tools/perf/ > $ make LDFLAGS=-static ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- > > Copied the static binary to my initrd image and tried running tests to > place hw_breakpoint on an kernel symbol as: > > # perf record -e "mem:0xffffffc00013f640:x"
Right, but that's not a valid invocation of perf. You have to give it something to record. Something like:
# perf record -e mem:0xffffffc00013f640:x -a -- sleep 10
for example.
Will
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