![Frederic Weisbecker](/assets/img/avatar_default.png)
If we want to stop the tick further idle, we need to be able to account the cputime without using the tick. Virtual based cputime accounting solves that problem by hooking into kernel/user boundaries. However implementing CONFIG_VIRT_CPU_ACCOUNTING require low level hooks and involves more overhead. But we already have a generic context tracking subsystem that is required for RCU needs by archs which plan to shut down the tick outside idle. This patch implements a generic virtual based cputime accounting that relies on these generic kernel/user hooks. There are some upsides of doing this: - This requires no arch code to implement CONFIG_VIRT_CPU_ACCOUNTING if context tracking is already built (already necessary for RCU in full tickless mode). - We can rely on the generic context tracking subsystem to dynamically (de)activate the hooks, so that we can switch anytime between virtual and tick based accounting. This way we don't have the overhead of the virtual accounting when the tick is running periodically. And one downside: - There is probably more overhead than a native virtual based cputime accounting. But this relies on hooks that are already set anyway. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Ingo Molnar <mingo@kernel.org> Cc: Li Zhong <zhong@linux.vnet.ibm.com> Cc: Namhyung Kim <namhyung.kim@lge.com> Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Paul Gortmaker <paul.gortmaker@windriver.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Thomas Gleixner <tglx@linutronix.de>
308 lines
7.2 KiB
Plaintext
308 lines
7.2 KiB
Plaintext
CONFIG_PPC64=y
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CONFIG_PPC_BOOK3E_64=y
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# CONFIG_VIRT_CPU_ACCOUNTING_NATIVE is not set
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CONFIG_SMP=y
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CONFIG_NR_CPUS=256
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CONFIG_EXPERIMENTAL=y
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CONFIG_SYSVIPC=y
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CONFIG_POSIX_MQUEUE=y
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CONFIG_BSD_PROCESS_ACCT=y
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CONFIG_TASKSTATS=y
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CONFIG_TASK_DELAY_ACCT=y
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CONFIG_TASK_XACCT=y
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CONFIG_TASK_IO_ACCOUNTING=y
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CONFIG_AUDIT=y
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CONFIG_AUDITSYSCALL=y
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CONFIG_IKCONFIG=y
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CONFIG_IKCONFIG_PROC=y
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CONFIG_LOG_BUF_SHIFT=19
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CONFIG_CGROUPS=y
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CONFIG_CGROUP_DEVICE=y
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CONFIG_CPUSETS=y
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CONFIG_CGROUP_CPUACCT=y
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CONFIG_RESOURCE_COUNTERS=y
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CONFIG_CGROUP_MEMCG=y
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CONFIG_CGROUP_MEMCG_SWAP=y
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CONFIG_NAMESPACES=y
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CONFIG_RELAY=y
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CONFIG_BLK_DEV_INITRD=y
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CONFIG_INITRAMFS_SOURCE=""
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CONFIG_RD_BZIP2=y
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CONFIG_RD_LZMA=y
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CONFIG_INITRAMFS_COMPRESSION_GZIP=y
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CONFIG_KALLSYMS_ALL=y
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CONFIG_EMBEDDED=y
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CONFIG_PERF_EVENTS=y
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CONFIG_PROFILING=y
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CONFIG_OPROFILE=y
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CONFIG_KPROBES=y
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CONFIG_MODULES=y
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CONFIG_MODULE_FORCE_LOAD=y
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CONFIG_MODULE_UNLOAD=y
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CONFIG_MODULE_FORCE_UNLOAD=y
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CONFIG_MODVERSIONS=y
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CONFIG_MODULE_SRCVERSION_ALL=y
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CONFIG_SCOM_DEBUGFS=y
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CONFIG_PPC_A2_DD2=y
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CONFIG_KVM_GUEST=y
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CONFIG_NO_HZ=y
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CONFIG_HIGH_RES_TIMERS=y
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CONFIG_HZ_100=y
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# CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS is not set
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CONFIG_BINFMT_MISC=y
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CONFIG_NUMA=y
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# CONFIG_MIGRATION is not set
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CONFIG_PPC_64K_PAGES=y
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CONFIG_SCHED_SMT=y
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CONFIG_CMDLINE_BOOL=y
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CONFIG_CMDLINE=""
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# CONFIG_SECCOMP is not set
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CONFIG_PCIEPORTBUS=y
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# CONFIG_PCIEASPM is not set
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CONFIG_PCI_MSI=y
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CONFIG_PACKET=y
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CONFIG_UNIX=y
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CONFIG_XFRM_USER=m
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CONFIG_XFRM_SUB_POLICY=y
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CONFIG_XFRM_STATISTICS=y
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CONFIG_NET_KEY=m
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CONFIG_NET_KEY_MIGRATE=y
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CONFIG_INET=y
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CONFIG_IP_MULTICAST=y
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CONFIG_IP_ADVANCED_ROUTER=y
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CONFIG_IP_ROUTE_MULTIPATH=y
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CONFIG_IP_ROUTE_VERBOSE=y
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CONFIG_IP_PNP=y
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CONFIG_IP_PNP_DHCP=y
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CONFIG_IP_PNP_BOOTP=y
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CONFIG_NET_IPIP=y
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CONFIG_IP_MROUTE=y
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CONFIG_IP_PIMSM_V1=y
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CONFIG_IP_PIMSM_V2=y
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CONFIG_SYN_COOKIES=y
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CONFIG_INET_AH=m
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CONFIG_INET_ESP=m
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CONFIG_INET_IPCOMP=m
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CONFIG_IPV6=y
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CONFIG_IPV6_PRIVACY=y
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CONFIG_IPV6_ROUTER_PREF=y
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CONFIG_IPV6_ROUTE_INFO=y
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CONFIG_IPV6_OPTIMISTIC_DAD=y
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CONFIG_INET6_AH=y
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CONFIG_INET6_ESP=y
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CONFIG_INET6_IPCOMP=y
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CONFIG_IPV6_MIP6=y
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CONFIG_INET6_XFRM_MODE_ROUTEOPTIMIZATION=y
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CONFIG_IPV6_TUNNEL=y
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CONFIG_IPV6_MULTIPLE_TABLES=y
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CONFIG_IPV6_SUBTREES=y
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CONFIG_IPV6_MROUTE=y
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CONFIG_IPV6_PIMSM_V2=y
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CONFIG_NETFILTER=y
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CONFIG_NF_CONNTRACK=m
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CONFIG_NF_CONNTRACK_EVENTS=y
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CONFIG_NF_CT_PROTO_UDPLITE=m
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CONFIG_NF_CONNTRACK_FTP=m
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CONFIG_NF_CONNTRACK_IRC=m
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CONFIG_NF_CONNTRACK_TFTP=m
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CONFIG_NF_CT_NETLINK=m
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CONFIG_NETFILTER_XT_TARGET_CLASSIFY=m
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CONFIG_NETFILTER_XT_TARGET_CONNMARK=m
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CONFIG_NETFILTER_XT_TARGET_MARK=m
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CONFIG_NETFILTER_XT_TARGET_NFLOG=m
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CONFIG_NETFILTER_XT_TARGET_NFQUEUE=m
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CONFIG_NETFILTER_XT_TARGET_TCPMSS=m
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CONFIG_NETFILTER_XT_MATCH_COMMENT=m
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CONFIG_NETFILTER_XT_MATCH_CONNBYTES=m
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CONFIG_NETFILTER_XT_MATCH_CONNLIMIT=m
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CONFIG_NETFILTER_XT_MATCH_CONNMARK=m
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CONFIG_NETFILTER_XT_MATCH_CONNTRACK=m
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CONFIG_NETFILTER_XT_MATCH_DCCP=m
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CONFIG_NETFILTER_XT_MATCH_DSCP=m
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CONFIG_NETFILTER_XT_MATCH_ESP=m
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CONFIG_NETFILTER_XT_MATCH_HASHLIMIT=m
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CONFIG_NETFILTER_XT_MATCH_HELPER=m
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CONFIG_NETFILTER_XT_MATCH_IPRANGE=m
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CONFIG_NETFILTER_XT_MATCH_LENGTH=m
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CONFIG_NETFILTER_XT_MATCH_LIMIT=m
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CONFIG_NETFILTER_XT_MATCH_MAC=m
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CONFIG_NETFILTER_XT_MATCH_MARK=m
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CONFIG_NETFILTER_XT_MATCH_MULTIPORT=m
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CONFIG_NETFILTER_XT_MATCH_OWNER=m
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CONFIG_NETFILTER_XT_MATCH_POLICY=m
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CONFIG_NETFILTER_XT_MATCH_PKTTYPE=m
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CONFIG_NETFILTER_XT_MATCH_QUOTA=m
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CONFIG_NETFILTER_XT_MATCH_RATEEST=m
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CONFIG_NETFILTER_XT_MATCH_REALM=m
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CONFIG_NETFILTER_XT_MATCH_RECENT=m
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CONFIG_NETFILTER_XT_MATCH_SCTP=m
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CONFIG_NETFILTER_XT_MATCH_STATE=m
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CONFIG_NETFILTER_XT_MATCH_STATISTIC=m
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CONFIG_NETFILTER_XT_MATCH_STRING=m
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CONFIG_NETFILTER_XT_MATCH_TCPMSS=m
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CONFIG_NETFILTER_XT_MATCH_TIME=m
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CONFIG_NETFILTER_XT_MATCH_U32=m
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CONFIG_NF_CONNTRACK_IPV4=m
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CONFIG_IP_NF_QUEUE=m
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CONFIG_IP_NF_IPTABLES=m
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CONFIG_IP_NF_MATCH_AH=m
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CONFIG_IP_NF_MATCH_ECN=m
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CONFIG_IP_NF_MATCH_TTL=m
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CONFIG_IP_NF_FILTER=m
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CONFIG_IP_NF_TARGET_REJECT=m
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CONFIG_IP_NF_TARGET_LOG=m
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CONFIG_IP_NF_TARGET_ULOG=m
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CONFIG_NF_NAT=m
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CONFIG_IP_NF_TARGET_MASQUERADE=m
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CONFIG_IP_NF_TARGET_NETMAP=m
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CONFIG_IP_NF_TARGET_REDIRECT=m
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CONFIG_NET_TCPPROBE=y
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# CONFIG_WIRELESS is not set
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CONFIG_NET_9P=y
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CONFIG_NET_9P_DEBUG=y
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CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug"
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CONFIG_DEVTMPFS=y
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CONFIG_MTD=y
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CONFIG_MTD_CHAR=y
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CONFIG_MTD_BLOCK=y
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CONFIG_MTD_CFI=y
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CONFIG_MTD_CFI_ADV_OPTIONS=y
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CONFIG_MTD_CFI_LE_BYTE_SWAP=y
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CONFIG_MTD_CFI_INTELEXT=y
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CONFIG_MTD_CFI_AMDSTD=y
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CONFIG_MTD_CFI_STAA=y
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CONFIG_MTD_PHYSMAP_OF=y
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CONFIG_PROC_DEVICETREE=y
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CONFIG_BLK_DEV_LOOP=y
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CONFIG_BLK_DEV_CRYPTOLOOP=y
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CONFIG_BLK_DEV_NBD=m
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CONFIG_BLK_DEV_RAM=y
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CONFIG_BLK_DEV_RAM_SIZE=65536
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CONFIG_CDROM_PKTCDVD=y
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CONFIG_MISC_DEVICES=y
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CONFIG_BLK_DEV_SD=y
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CONFIG_BLK_DEV_SR=y
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CONFIG_BLK_DEV_SR_VENDOR=y
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CONFIG_CHR_DEV_SG=y
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CONFIG_SCSI_MULTI_LUN=y
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CONFIG_SCSI_CONSTANTS=y
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CONFIG_SCSI_SPI_ATTRS=y
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CONFIG_SCSI_FC_ATTRS=y
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CONFIG_SCSI_ISCSI_ATTRS=m
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CONFIG_SCSI_SAS_ATTRS=m
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CONFIG_SCSI_SRP_ATTRS=y
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CONFIG_ATA=y
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CONFIG_SATA_AHCI=y
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CONFIG_SATA_SIL24=y
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CONFIG_SATA_MV=y
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CONFIG_SATA_SIL=y
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CONFIG_PATA_CMD64X=y
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CONFIG_PATA_MARVELL=y
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CONFIG_PATA_SIL680=y
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CONFIG_MD=y
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CONFIG_BLK_DEV_MD=y
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CONFIG_MD_LINEAR=y
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CONFIG_BLK_DEV_DM=y
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CONFIG_DM_CRYPT=y
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CONFIG_DM_SNAPSHOT=y
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CONFIG_DM_MIRROR=y
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CONFIG_DM_ZERO=y
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CONFIG_DM_UEVENT=y
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CONFIG_NETDEVICES=y
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CONFIG_TUN=y
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CONFIG_E1000E=y
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CONFIG_TIGON3=y
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# CONFIG_WLAN is not set
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# CONFIG_INPUT is not set
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# CONFIG_SERIO is not set
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# CONFIG_VT is not set
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CONFIG_DEVPTS_MULTIPLE_INSTANCES=y
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CONFIG_SERIAL_8250=y
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CONFIG_SERIAL_8250_CONSOLE=y
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CONFIG_HW_RANDOM=y
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CONFIG_RAW_DRIVER=y
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CONFIG_MAX_RAW_DEVS=1024
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# CONFIG_HWMON is not set
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# CONFIG_VGA_ARB is not set
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# CONFIG_USB_SUPPORT is not set
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CONFIG_EDAC=y
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CONFIG_EDAC_MM_EDAC=y
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CONFIG_RTC_CLASS=y
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CONFIG_RTC_DRV_DS1511=y
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CONFIG_RTC_DRV_DS1553=y
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CONFIG_EXT2_FS=y
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CONFIG_EXT2_FS_XATTR=y
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CONFIG_EXT2_FS_POSIX_ACL=y
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CONFIG_EXT2_FS_SECURITY=y
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CONFIG_EXT2_FS_XIP=y
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CONFIG_EXT3_FS=y
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# CONFIG_EXT3_DEFAULTS_TO_ORDERED is not set
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CONFIG_EXT3_FS_POSIX_ACL=y
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CONFIG_EXT3_FS_SECURITY=y
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CONFIG_EXT4_FS=y
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# CONFIG_DNOTIFY is not set
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CONFIG_FUSE_FS=y
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CONFIG_ISO9660_FS=y
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CONFIG_JOLIET=y
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CONFIG_ZISOFS=y
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CONFIG_UDF_FS=m
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CONFIG_MSDOS_FS=y
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CONFIG_VFAT_FS=y
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CONFIG_PROC_KCORE=y
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CONFIG_TMPFS=y
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CONFIG_TMPFS_POSIX_ACL=y
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CONFIG_CONFIGFS_FS=m
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CONFIG_CRAMFS=y
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CONFIG_NFS_FS=y
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CONFIG_NFS_V3=y
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CONFIG_NFS_V3_ACL=y
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CONFIG_NFS_V4=y
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CONFIG_NFS_V4_1=y
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CONFIG_ROOT_NFS=y
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CONFIG_CIFS=y
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CONFIG_CIFS_WEAK_PW_HASH=y
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CONFIG_CIFS_XATTR=y
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CONFIG_CIFS_POSIX=y
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CONFIG_NLS_CODEPAGE_437=y
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CONFIG_NLS_ASCII=y
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CONFIG_NLS_ISO8859_1=y
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CONFIG_CRC_CCITT=m
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CONFIG_CRC_T10DIF=y
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CONFIG_LIBCRC32C=m
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CONFIG_PRINTK_TIME=y
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CONFIG_MAGIC_SYSRQ=y
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CONFIG_STRIP_ASM_SYMS=y
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CONFIG_DETECT_HUNG_TASK=y
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# CONFIG_SCHED_DEBUG is not set
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CONFIG_DEBUG_INFO=y
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CONFIG_FTRACE_SYSCALLS=y
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CONFIG_PPC_EMULATED_STATS=y
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CONFIG_XMON=y
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CONFIG_XMON_DEFAULT=y
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CONFIG_IRQ_DOMAIN_DEBUG=y
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CONFIG_PPC_EARLY_DEBUG=y
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CONFIG_KEYS_DEBUG_PROC_KEYS=y
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CONFIG_CRYPTO_NULL=m
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CONFIG_CRYPTO_TEST=m
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CONFIG_CRYPTO_CCM=m
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CONFIG_CRYPTO_GCM=m
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CONFIG_CRYPTO_PCBC=m
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CONFIG_CRYPTO_MICHAEL_MIC=m
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CONFIG_CRYPTO_SHA256=m
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CONFIG_CRYPTO_SHA512=m
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CONFIG_CRYPTO_TGR192=m
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CONFIG_CRYPTO_WP512=m
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CONFIG_CRYPTO_AES=m
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CONFIG_CRYPTO_ANUBIS=m
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CONFIG_CRYPTO_BLOWFISH=m
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CONFIG_CRYPTO_CAST5=m
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CONFIG_CRYPTO_CAST6=m
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CONFIG_CRYPTO_KHAZAD=m
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CONFIG_CRYPTO_SALSA20=m
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CONFIG_CRYPTO_SERPENT=m
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CONFIG_CRYPTO_TEA=m
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CONFIG_CRYPTO_TWOFISH=m
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CONFIG_CRYPTO_LZO=m
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# CONFIG_CRYPTO_ANSI_CPRNG is not set
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CONFIG_VIRTUALIZATION=y
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