Lines Matching full:access

95 Perf Userspace PMU Hardware Counter Access
103 Arm64 allows userspace tools to have access to the registers storing the
111 The focus is set on the armv8 PMUv3 which makes sure that the access to the pmu
112 registers is enabled and that the userspace has access to the relevant
115 In order to have access to the hardware counters, the global sysctl
127 index enables the user to access the PMU registers using the `mrs` instruction.
128 Access to the PMU registers is only valid while the sequence lock is unchanged.
132 The userspace access is supported in libperf using the perf_evsel__mmap()
138 On heterogeneous systems such as big.LITTLE, userspace PMU counter access can
144 can be run using the perf tool to check that the access to the registers works
154 counter along with userspace access. The sys_perf_event_open syscall will fail
157 access. If a 32-bit counter is requested on hardware with 64-bit counters, then