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charset="utf-8" Add interrupt throttling accounting for below cases: o IBS Op PMU: A software filter (in addition to the hardware filter) drops samples whose load latency is below the user-specified threshold. o IBS Fetch PMU: Samples discarded due to the zero-RIP erratum (#1197). Although these samples are discarded, the NMI cost is still incurred, so they should be counted for interrupt throttling. Signed-off-by: Ravi Bangoria --- arch/x86/events/amd/ibs.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/arch/x86/events/amd/ibs.c b/arch/x86/events/amd/ibs.c index aca89f23d2e0..705ef43325be 100644 --- a/arch/x86/events/amd/ibs.c +++ b/arch/x86/events/amd/ibs.c @@ -1293,8 +1293,10 @@ static int perf_ibs_handle_irq(struct perf_ibs *perf= _ibs, struct pt_regs *iregs) * within [128, 2048] range. */ if (!op_data3.ld_op || !op_data3.dc_miss || - op_data3.dc_miss_lat <=3D (event->attr.config1 & 0xFFF)) + op_data3.dc_miss_lat <=3D (event->attr.config1 & 0xFFF)) { + throttle =3D perf_event_account_interrupt(event); goto out; + } } =20 /* @@ -1326,8 +1328,10 @@ static int perf_ibs_handle_irq(struct perf_ibs *perf= _ibs, struct pt_regs *iregs) regs.flags &=3D ~PERF_EFLAGS_EXACT; } else { /* Workaround for erratum #1197 */ - if (perf_ibs->fetch_ignore_if_zero_rip && !(ibs_data.regs[1])) + if (perf_ibs->fetch_ignore_if_zero_rip && !(ibs_data.regs[1])) { + throttle =3D perf_event_account_interrupt(event); goto out; + } =20 set_linear_ip(®s, ibs_data.regs[1]); regs.flags |=3D PERF_EFLAGS_EXACT; --=20 2.43.0