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https://github.com/ibm-s390-linux/s390-tools.git
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fcb1f7efd1
Add virtual counters pai_user and pai_kernel to detail all Processor Activity Instrumentation (PAI) counters in user resp. kernel space. Once activated, they will show all counters for the corresponding set. Add option -n to limit the display to only non-zero counter values. Add support for cpu hotplug events based on libudev. CPU hotplug events are used to either detach from a vanishing CPU or (re-)attach to a (re-)appearing CPU. In that case, a "hotplug detected" virtual counter is set to a non-zero value to indicate possible loss of counters which happens when CPACF is used on the CPU before cpacfstatsd could attach to it. The hotplug indication is cleared once all counters are deactivated. Add support for JSON output. The JSON document is an array of JSON objects representing the counters and their values. Every object has a name (property "counter") and a value (property "value"). For PAI counters, the counters also have a space (property "space") determining the counter set pai_user or pai_kernel, and a numeric id (property "counterid") that can be used to filter the JSON document. Signed-off-by: Juergen Christ <jchrist@linux.ibm.com> Reviewed-By: Harald Freudenberger <freude@linux.ibm.com> Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
137 lines
2.7 KiB
C
137 lines
2.7 KiB
C
/*
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* cpacfstats - display and maintain CPACF perf counters
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*
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* common function prototypes and definitions
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*
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* Copyright IBM Corp. 2015, 2022
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*
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* s390-tools is free software; you can redistribute it and/or modify
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* it under the terms of the MIT license. See LICENSE for details.
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*/
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#ifndef CPACFSTATS_H
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#define CPACFSTATS_H
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#include "lib/zt_common.h"
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#define COPYRIGHT "Copyright IBM Corp. 2015, 2022"
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#define DEFAULT_SEND_TIMEOUT (30 * 1000)
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#define DEFAULT_RECV_TIMEOUT (30 * 1000)
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/*
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* Number of PAI counters for user space. This excludes PCKMO since
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* this instruction is privileged.
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*/
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#define NUM_PAI_USER 143
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/* Number of PAI counters for kernel space. Contains all counters. */
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#define NUM_PAI_KERNEL 156
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int eprint(const char *format, ...);
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/*
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* Counter names
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* ALL_COUNTER specifies the number of physical counters. Virtual
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* counters might be added afterwards. NUM_COUNTER is the last
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* managed counter (i.e., a counter that can be activated, reset,
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* deactivated).
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*/
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enum ctr_e {
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DES_FUNCTIONS = 0,
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AES_FUNCTIONS,
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SHA_FUNCTIONS,
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PRNG_FUNCTIONS,
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ECC_FUNCTIONS,
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ALL_COUNTER,
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PAI_USER,
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PAI_KERNEL,
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NUM_COUNTER,
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HOTPLUG_DETECTED = 0xffff
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};
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enum type_e {
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QUERY = 0,
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ANSWER
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};
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enum cmd_e {
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PRINT = 0,
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ENABLE,
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DISABLE,
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RESET
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};
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enum state_e {
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DISABLED = 0,
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ENABLED,
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UNSUPPORTED
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};
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/*
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* query send from client to daemon
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* Consist of:
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* enum counter
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* enum command
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*/
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struct msg_query {
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uint32_t m_ctr;
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uint32_t m_cmd;
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} __packed;
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/*
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* answer send from daemon to client
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* Consist of:
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* enum counter or PAI counter number if following PAI_USER or PAI_KERNEL
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* status code: < 0 error, 0 disabled, > 0 enabled
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* counter value
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*/
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struct msg_answer {
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uint32_t m_ctr;
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int32_t m_state;
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uint64_t m_value;
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} __packed;
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/* stats_sock.c */
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#define SERVER 1
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#define CLIENT 2
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#define BACKLOG 10
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#define SOCKET_FILE "/run/cpacfstatsd_socket"
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#define PID_FILE "/run/cpacfstatsd.pid"
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#define CPACFSTATS_GROUP "cpacfstats"
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struct msg_header {
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uint32_t m_ver;
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uint32_t m_type;
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} __packed;
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struct msg {
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struct msg_header head;
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union {
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struct msg_query query;
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struct msg_answer answer;
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};
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} __packed;
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int open_socket(int mode);
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int send_msg(int sfd, struct msg *m, int timeout);
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int recv_msg(int sfd, struct msg *m, int timeout);
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/* perf_crypto.c */
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int perf_init(void);
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void perf_stop(void);
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void perf_close(void);
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int perf_enable_ctr(enum ctr_e ctr);
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int perf_disable_ctr(enum ctr_e ctr);
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int perf_reset_ctr(enum ctr_e ctr, uint64_t *value);
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int perf_read_ctr(enum ctr_e ctr, uint64_t *value);
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int perf_ecc_supported(void);
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int perf_ctr_state(enum ctr_e ctr);
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int perf_read_pai_ctr(unsigned int ctrnum, int user, uint64_t *value);
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#endif
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