perf/x86/intel/uncore: Fix CAS_COUNT_WRITE issue for ICX
The user recently report a perf issue in the ICX platform, when test by perf event “uncore_imc_x/cas_count_write”,the write bandwidth is always very small (only 0.38MB/s), it is caused by the wrong "umask" for the "cas_count_write" event. When double-checking, find "cas_count_read" also is wrong. The public document for ICX uncore: 3rd Gen Intel® Xeon® Processor Scalable Family, Codename Ice Lake,Uncore Performance Monitoring Reference Manual, Revision 1.00, May 2021 On 2.4.7, it defines Unit Masks for CAS_COUNT: RD b00001111 WR b00110000 So corrected both "cas_count_read" and "cas_count_write" for ICX. Old settings: hswep_uncore_imc_events INTEL_UNCORE_EVENT_DESC(cas_count_read, "event=0x04,umask=0x03") INTEL_UNCORE_EVENT_DESC(cas_count_write, "event=0x04,umask=0x0c") New settings: snr_uncore_imc_events INTEL_UNCORE_EVENT_DESC(cas_count_read, "event=0x04,umask=0x0f") INTEL_UNCORE_EVENT_DESC(cas_count_write, "event=0x04,umask=0x30") Fixes: 2b3b76b5 ("perf/x86/intel/uncore: Add Ice Lake server uncore support") Signed-off-by: NZhengjun Xing <zhengjun.xing@linux.intel.com> Signed-off-by: NPeter Zijlstra (Intel) <peterz@infradead.org> Reviewed-by: NAdrian Hunter <adrian.hunter@intel.com> Reviewed-by: NKan Liang <kan.liang@linux.intel.com> Cc: stable@vger.kernel.org Link: https://lkml.kernel.org/r/20211223144826.841267-1-zhengjun.xing@linux.intel.com
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