linux_dsm_epyc7002/arch/x86/events
Vaibhav Shankar 24633d901e perf/x86/intel/uncore: Add BW counters for GT, IA and IO breakdown
Linux only has support to read total DDR reads and writes. Here we
add support to enable bandwidth breakdown-GT, IA and IO. Breakdown
of BW is important to debug and optimize memory access. This can also
be used for telemetry and improving the system software.The offsets for
GT, IA and IO are added and these free running counters can be accessed
via MMIO space.

The BW breakdown can be measured using the following cmd:

  perf stat -e uncore_imc/gt_requests/,uncore_imc/ia_requests/,uncore_imc/io_requests/

             30.57 MiB  uncore_imc/gt_requests/
           1346.13 MiB  uncore_imc/ia_requests/
            190.97 MiB  uncore_imc/io_requests/

       5.984572733 seconds time elapsed

     BW/s = <gt,ia,io>_requests/time elapsed

Signed-off-by: Vaibhav Shankar <vaibhav.shankar@intel.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20200814022234.23605-1-vaibhav.shankar@intel.com
2020-08-15 20:24:18 +02:00
..
amd x86/msr: Lift AMD family 0x15 power-specific MSRs 2020-06-15 19:25:53 +02:00
intel perf/x86/intel/uncore: Add BW counters for GT, IA and IO breakdown 2020-08-15 20:24:18 +02:00
zhaoxin x86/perf: Fix a typo 2020-07-22 10:22:08 +02:00
core.c perf/x86/intel/lbr: Support XSAVES for arch LBR read 2020-07-08 11:38:57 +02:00
Kconfig treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
Makefile perf/x86/rapl: Fix RAPL config variable bug 2020-06-02 11:52:56 +02:00
msr.c perf/x86/msr: Add Tremont support 2020-02-11 13:17:50 +01:00
perf_event.h perf/x86/intel/lbr: Support XSAVES for arch LBR read 2020-07-08 11:38:57 +02:00
probe.c perf/x86/rapl: Make perf_probe_msr() more robust and flexible 2020-05-28 07:58:55 +02:00
probe.h perf/x86: Add MSR probe interface 2019-06-24 19:28:31 +02:00
rapl.c perf/x86/rapl: Add support for Intel SPR platform 2020-08-14 12:35:12 +02:00