# Profiler > The Profiler tool shows CPU usage for each RouterOS process classifier, summed or per core, to identify which process consumes CPU resources. # Profiler The Profiler tool shows CPU usage for each process running in RouterOS. It helps to identify which process is using most of the CPU resources. See the [video about this feature](https://youtu.be/BkRaW14p8_s). ```ros [admin@MikroTik] > /tool/profile ``` Processes are grouped by type (classifiers), for example `wireless`, `bridging` or `console`, and each classifier's CPU usage is shown separately. Only the classifiers with running processes appear, so the rows depend on the device and the features in use. On multi-core systems, the `cpu` parameter selects the view: `cpu=total` (the default) sums the usage of all cores, `cpu=all` shows every core separately with per-core `cpuN` summary rows, and `cpu=` shows only that core. Both views are demonstrated in the example below. Without a `duration`, the profile keeps refreshing until you stop it; `freeze-frame-interval` (in seconds) sets how often a new frame is printed, and each frame shows the usage measured since the previous frame. With `duration`, the tool stops after the given number of seconds. The first one or two frames show only the `total` row before the sampled data arrives. For a plain per-core load summary without the process split (for example for scripts), use [`/system/resource/cpu/print`](../cli-reference/system/resource/cpu). ## Find a busy process A runaway script keeps one core busy. In the summed view (`cpu=total`), 100% usage of one core of a 4-core router shows as 25%: ```ros [admin@MikroTik] > /tool/profile cpu=total freeze-frame-interval=1 duration=5 Columns: NAME, USAGE NAME USAGE interface-mgmt 0% bridging 0% console 25.1% resource-mgmt 0% ssh 0% total 25.1% ``` `console` consuming the CPU points at script or console session activity (here a script loop). The per-core view shows the exact core and its total in the `cpuN` rows: ```ros [admin@MikroTik] > /tool/profile cpu=all freeze-frame-interval=1 duration=3 Columns: NAME, CPU, USAGE NAME CPU USAGE console 0 95.5% cpu0 95.5% console 1 0.5% wireless 1 0.5% kernel 1 0.5% cpu1 1.5% console 2 4% certificate 2 0.5% cpu2 4.5% console 3 0.5% cpu3 0.5% ``` ## Classifiers RouterOS processes are classified by type and the CPU usage of each type is displayed separately for ease of debugging. Besides the feature classifiers below, system rows such as `kernel`, `ipc`, `interface-mgmt` and `resource-mgmt` can also appear; anything without a classifier accounts under `unclassified`: | Property | Description | | :-- | :-- | | backup | Backup service | | bfd | BFD service | | bgp | BGP service | | bridging | Bridging service | | btest | Bandwidth test. | | certificate | Certificate service | | console | Console | | container | combined container usage | | dhcp | DHCP-Server and DHCP-Client services | | disk | storage-related services | | dns | DNS-related services | | dude | The Dude package services | | e-mail | e-mail tool | | encrypting | encrypting processes | | eoip | EoIP | | ethernet | Ethernet-related properties like link speed, auto-negotiation, duplex mode, monitor transceiver diagnostic information, etc. | | fetcher | Fetch tool | | fileman | File manager | | firewall | Firewall-related processes | | firewall-mgmt | Firewall Management: Filtering, NAT, Mangle | | flash | storage-related services | | ftp | FTP Service | | gps | GPS Service | | graphing | Graphing tool | | gre | GRE | | health | system monitoring, system health | | hotspot | Hotspot service | | idle | Free CPU resources | | igmp-proxy | IGMP Proxy service | | internet-detect | Detect Internet tool | | ip-pool | IP Pool service | | ipsec | IPsec service: xfrm - set of statistics showing numbers of packets dropped by the transformation code and why. drivers/crypto - drivers that provide access to the hardware cryptographic accelerators. ipsec - processes that relate to the Internet Key Exchange (IKE) protocols, Authentication Header (AH), Encapsulating Security Payload (ESP). | | kvm | KVM virtual machine functionality | | l7-matcher | L7 matcher | | lcd | LCD Interfaces system | | ldp | Label Distribution Protocol (LDP) | | logging | Logging system | | management | different subsystems: scheduler, networking, file management, etc. | | mpls | MPLS-related features | | neighbor-discovery | Neighbor discovery service | | networking | common set of services included in the networking | | ntp | NTP service | | ospf | OSPF service | | ovpn | OVPN service | | pim | Protocol Independent Multicast | | profiling | Profiler service | | queue-mgmt | Queues: Simple queues, Queue tree, Queue types | | queuing | Intermediate Queuing | | radius | RADIUS service | | radvd | IPv6 Router Advertisement daemon (radvd) service | | remote-access | accessing the device directly without logging into RouterOS | | rip | Routing Information Protocol | | routing | Routing-related services | | serial | serial console and terminal tool | | sniffing | packet Sniffer tool | | snmp | SNMP | | socks | Socket Secure | | spi | storage-related services | | ssh | SSH Server | | ssl | SSL | | supout.rif | supout.rif file generation | | telnet | Telnet service | | tftp | TFTP service | | traffic-accounting | Traffic-Flow log system | | traffic-flow | Traffic-Flow system | | unclassified | processes or services that are not defined by this classifier | | upnp | UPnP protocol | | usb | USB features | | user-manager | User Manager service | | vrrp | VRRP | | web-proxy | Web Proxy | | winbox | Winbox | | wireguard | Wireguard | | wireless | common set of services using Wireless systems | | www | Webfig HTTP service | | zerotier | ZeroTier | For all parameters, see the [`/tool/profile`](../cli-reference/tool/profile) CLI reference.