This series introduces trace events which can dump the latency of
instructions xsave and xrstor for x86 platform. In internal testing
we compared several optional latency calculation method, believe
it can be a more optimized approach to get the latency.
Also, the series introduces a script to consume trace log, which
leverage sqlite3 to show statistics data such as max, min, latency
and 97% tail latency.
This series has gone through several versions of peer-reviewed
internally. All patches have review tags. It's ready for review by
the [email protected] maintainers.
Yi Sun (2):
x86/fpu: Measure the Latency of XSAVE and XRSTOR
scripts/x86: Add script to consume trace log of xsave latency
arch/x86/include/asm/trace/fpu.h | 35 +++++
before submission.
arch/x86/kernel/fpu/xstate.h | 49 ++++++-
scripts/x86/xsave-latency-trace.sh | 227 +++++++++++++++++++++++++++++
3 files changed, 306 insertions(+), 5 deletions(-)
create mode 100755 scripts/x86/xsave-latency-trace.sh
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2.34.1