linux/linux-stable.git - Linux kernel stable tree

Age	Commit message (Collapse)	Author
5 days	RISC-V: perf/kvm: Add reporting of interrupt events	Quan Zhou
	For `perf kvm stat` on the RISC-V, in order to avoid the occurrence of `UNKNOWN` event names, interrupts should be reported in addition to exceptions. testing without patch: Event name Samples Sample% Time(ns) --------------------------- -------- -------- ------------ STORE_GUEST_PAGE_FAULT 1496461 53.00% 889612544 UNKNOWN 887514 31.00% 272857968 LOAD_GUEST_PAGE_FAULT 305164 10.00% 189186331 VIRTUAL_INST_FAULT 70625 2.00% 134114260 SUPERVISOR_SYSCALL 32014 1.00% 58577110 INST_GUEST_PAGE_FAULT 1 0.00% 2545 testing with patch: Event name Samples Sample% Time(ns) --------------------------- -------- -------- ------------ IRQ_S_TIMER 211271 58.00% 738298680600 EXC_STORE_GUEST_PAGE_FAULT 111279 30.00% 130725914800 EXC_LOAD_GUEST_PAGE_FAULT 22039 6.00% 25441480600 EXC_VIRTUAL_INST_FAULT 8913 2.00% 21015381600 IRQ_VS_EXT 4748 1.00% 10155464300 IRQ_S_EXT 2802 0.00% 13288775800 IRQ_S_SOFT 1998 0.00% 4254129300 Signed-off-by: Quan Zhou <zhouquan@iscas.ac.cn> Reviewed-by: Andrew Jones <ajones@ventanamicro.com> Link: https://lore.kernel.org/r/9693132df4d0f857b8be3a75750c36b40213fcc0.1726211632.git.zhouquan@iscas.ac.cn Signed-off-by: Anup Patel <anup@brainfault.org>
2024-06-26	perf kvm/riscv: Port perf kvm stat to RISC-V	Shenlin Liang
	'perf kvm stat report/record' generates a statistical analysis of KVM events and can be used to analyze guest exit reasons. "report" reports statistical analysis of guest exit events. To record kvm events on the host: # perf kvm stat record -a To report kvm VM EXIT events: # perf kvm stat report --event=vmexit Signed-off-by: Shenlin Liang <liangshenlin@eswincomputing.com> Reviewed-by: Atish Patra <atishp@rivosinc.com> Tested-by: Atish Patra <atishp@rivosinc.com> Link: https://lore.kernel.org/r/20240422080833.8745-3-liangshenlin@eswincomputing.com Signed-off-by: Anup Patel <anup@brainfault.org>