mirror of
https://github.com/projectacrn/acrn-hypervisor.git
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512c98fd79
To maximize the cpu utilization, core 0 is usually shared by service vm and guest vm. But there are no statistics to show the cpu occupation of each vm. This patch is to provide cpu usage statistic for users. To calculate it, a new trace event is added and marked in scheduling context switch, accompanying with a new python script to analyze the data from acrntrace output. Tracked-On: #8621 Signed-off-by: nacui <na.cui@intel.com> Reviewed-by: Junjie Mao <junjie.mao@intel.com> Reviewed-by: Haiwei Li <haiwei.li@intel.com>
136 lines
2.9 KiB
C
136 lines
2.9 KiB
C
/*
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* Copyright (C) 2018-2022 Intel Corporation.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include <types.h>
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#include <asm/per_cpu.h>
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#include <ticks.h>
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#include <trace.h>
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#define TRACE_CUSTOM 0xFCU
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#define TRACE_FUNC_ENTER 0xFDU
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#define TRACE_FUNC_EXIT 0xFEU
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#define TRACE_STR 0xFFU
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/* sizeof(trace_entry) == 4 x 64bit */
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struct trace_entry {
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uint64_t tsc; /* TSC */
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uint64_t id:48;
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uint8_t n_data; /* nr of data in trace_entry */
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uint8_t cpu; /* pcpu id of trace_entry */
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union {
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struct {
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uint32_t a, b, c, d;
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} fields_32;
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struct {
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uint8_t a1, a2, a3, a4;
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uint8_t b1, b2, b3, b4;
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uint8_t c1, c2, c3, c4;
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uint8_t d1, d2, d3, d4;
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} fields_8;
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struct {
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uint64_t e;
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uint64_t f;
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} fields_64;
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char str[16];
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} payload;
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} __aligned(8);
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static inline bool trace_check(uint16_t cpu_id)
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{
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if (per_cpu(sbuf, cpu_id)[ACRN_TRACE] == NULL) {
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return false;
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}
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return true;
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}
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static inline void trace_put(uint16_t cpu_id, uint32_t evid, uint32_t n_data, struct trace_entry *entry)
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{
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struct shared_buf *sbuf = per_cpu(sbuf, cpu_id)[ACRN_TRACE];
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entry->tsc = cpu_ticks();
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entry->id = evid;
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entry->n_data = (uint8_t)n_data;
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entry->cpu = (uint8_t)cpu_id;
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(void)sbuf_put(sbuf, (uint8_t *)entry, sizeof(*entry));
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}
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void TRACE_2L(uint32_t evid, uint64_t e, uint64_t f)
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{
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struct trace_entry entry;
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uint16_t cpu_id = get_pcpu_id();
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if (!trace_check(cpu_id)) {
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return;
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}
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entry.payload.fields_64.e = e;
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entry.payload.fields_64.f = f;
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trace_put(cpu_id, evid, 2U, &entry);
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}
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void TRACE_4I(uint32_t evid, uint32_t a, uint32_t b, uint32_t c, uint32_t d)
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{
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struct trace_entry entry;
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uint16_t cpu_id = get_pcpu_id();
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if (!trace_check(cpu_id)) {
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return;
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}
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entry.payload.fields_32.a = a;
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entry.payload.fields_32.b = b;
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entry.payload.fields_32.c = c;
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entry.payload.fields_32.d = d;
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trace_put(cpu_id, evid, 4U, &entry);
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}
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void TRACE_6C(uint32_t evid, uint8_t a1, uint8_t a2, uint8_t a3, uint8_t a4, uint8_t b1, uint8_t b2)
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{
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struct trace_entry entry;
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uint16_t cpu_id = get_pcpu_id();
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if (!trace_check(cpu_id)) {
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return;
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}
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entry.payload.fields_8.a1 = a1;
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entry.payload.fields_8.a2 = a2;
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entry.payload.fields_8.a3 = a3;
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entry.payload.fields_8.a4 = a4;
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entry.payload.fields_8.b1 = b1;
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entry.payload.fields_8.b2 = b2;
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/* payload.fields_8.b3/b4 not used, but is put in trace buf */
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trace_put(cpu_id, evid, 8U, &entry);
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}
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#define TRACE_ENTER TRACE_16STR(TRACE_FUNC_ENTER, __func__)
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#define TRACE_EXIT TRACE_16STR(TRACE_FUNC_EXIT, __func__)
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void TRACE_16STR(uint32_t evid, const char name[])
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{
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struct trace_entry entry;
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uint16_t cpu_id = get_pcpu_id();
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size_t len, i;
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if (!trace_check(cpu_id)) {
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return;
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}
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entry.payload.fields_64.e = 0UL;
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entry.payload.fields_64.f = 0UL;
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len = strnlen_s(name, 20U);
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len = (len > 16U) ? 16U : len;
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for (i = 0U; i < len; i++) {
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entry.payload.str[i] = name[i];
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}
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entry.payload.str[15] = 0;
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trace_put(cpu_id, evid, 16U, &entry);
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}
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