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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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tools/power turbostat: show IRQs per CPU
The new IRQ column shows how many interrupts have occurred on each CPU during the measurement inteval. This information comes from the difference between /proc/interrupts shapshots made before and after the measurement interval. The first row, the system summary, shows the sum of the IRQS for all CPUs during that interval. Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Len Brown
parent
36229897ba
commit
562a2d377b
@ -75,6 +75,7 @@ unsigned int extra_msr_offset64;
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unsigned int extra_delta_offset32;
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unsigned int extra_delta_offset64;
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unsigned int aperf_mperf_multiplier = 1;
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int do_irq = 1;
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int do_smi;
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double bclk;
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double base_hz;
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@ -154,6 +155,7 @@ struct thread_data {
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unsigned long long extra_delta64;
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unsigned long long extra_msr32;
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unsigned long long extra_delta32;
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unsigned int irq_count;
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unsigned int smi_count;
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unsigned int cpu_id;
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unsigned int flags;
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@ -221,6 +223,9 @@ struct topo_params {
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struct timeval tv_even, tv_odd, tv_delta;
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int *irq_column_2_cpu; /* /proc/interrupts column numbers */
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int *irqs_per_cpu; /* indexed by cpu_num */
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void setup_all_buffers(void);
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int cpu_is_not_present(int cpu)
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@ -306,8 +311,8 @@ int get_msr(int cpu, off_t offset, unsigned long long *msr)
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/*
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* Example Format w/ field column widths:
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*
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* Package Core CPU Avg_MHz Bzy_MHz TSC_MHz SMI Busy% CPU_%c1 CPU_%c3 CPU_%c6 CPU_%c7 CoreTmp PkgTmp Pkg%pc2 Pkg%pc3 Pkg%pc6 Pkg%pc7 PkgWatt CorWatt GFXWatt
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* 123456781234567812345678123456781234567812345678123456781234567812345678123456781234567812345678123456781234567812345678123456781234567812345678123456781234567812345678
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* Package Core CPU Avg_MHz Bzy_MHz TSC_MHz IRQ SMI Busy% CPU_%c1 CPU_%c3 CPU_%c6 CPU_%c7 CoreTmp PkgTmp Pkg%pc2 Pkg%pc3 Pkg%pc6 Pkg%pc7 PkgWatt CorWatt GFXWatt
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* 12345678123456781234567812345678123456781234567812345678123456781234567812345678123456781234567812345678123456781234567812345678123456781234567812345678123456781234567812345678
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*/
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void print_header(void)
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@ -338,6 +343,8 @@ void print_header(void)
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if (!debug)
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goto done;
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if (do_irq)
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outp += sprintf(outp, " IRQ");
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if (do_smi)
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outp += sprintf(outp, " SMI");
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@ -429,6 +436,8 @@ int dump_counters(struct thread_data *t, struct core_data *c,
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extra_msr_offset32, t->extra_msr32);
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outp += sprintf(outp, "msr0x%x: %016llX\n",
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extra_msr_offset64, t->extra_msr64);
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if (do_irq)
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outp += sprintf(outp, "IRQ: %08X\n", t->irq_count);
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if (do_smi)
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outp += sprintf(outp, "SMI: %08X\n", t->smi_count);
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}
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@ -562,6 +571,10 @@ int format_counters(struct thread_data *t, struct core_data *c,
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if (!debug)
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goto done;
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/* IRQ */
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if (do_irq)
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outp += sprintf(outp, "%8d", t->irq_count);
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/* SMI */
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if (do_smi)
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outp += sprintf(outp, "%8d", t->smi_count);
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@ -827,6 +840,9 @@ delta_thread(struct thread_data *new, struct thread_data *old,
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old->extra_msr32 = new->extra_msr32;
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old->extra_msr64 = new->extra_msr64;
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if (do_irq)
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old->irq_count = new->irq_count - old->irq_count;
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if (do_smi)
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old->smi_count = new->smi_count - old->smi_count;
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}
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@ -856,10 +872,12 @@ void clear_counters(struct thread_data *t, struct core_data *c, struct pkg_data
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t->mperf = 0;
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t->c1 = 0;
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t->smi_count = 0;
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t->extra_delta32 = 0;
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t->extra_delta64 = 0;
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t->irq_count = 0;
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t->smi_count = 0;
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/* tells format_counters to dump all fields from this set */
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t->flags = CPU_IS_FIRST_THREAD_IN_CORE | CPU_IS_FIRST_CORE_IN_PACKAGE;
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@ -903,6 +921,9 @@ int sum_counters(struct thread_data *t, struct core_data *c,
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average.threads.extra_delta32 += t->extra_delta32;
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average.threads.extra_delta64 += t->extra_delta64;
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average.threads.irq_count += t->irq_count;
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average.threads.smi_count += t->smi_count;
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/* sum per-core values only for 1st thread in core */
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if (!(t->flags & CPU_IS_FIRST_THREAD_IN_CORE))
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return 0;
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@ -1000,7 +1021,6 @@ static unsigned long long rdtsc(void)
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return low | ((unsigned long long)high) << 32;
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}
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/*
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* get_counters(...)
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* migrate to cpu
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@ -1027,6 +1047,8 @@ int get_counters(struct thread_data *t, struct core_data *c, struct pkg_data *p)
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t->mperf = t->mperf * aperf_mperf_multiplier;
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}
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if (do_irq)
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t->irq_count = irqs_per_cpu[cpu];
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if (do_smi) {
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if (get_msr(cpu, MSR_SMI_COUNT, &msr))
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return -5;
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@ -1515,6 +1537,9 @@ void free_all_buffers(void)
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outp = NULL;
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free_fd_percpu();
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free(irq_column_2_cpu);
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free(irqs_per_cpu);
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}
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/*
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@ -1737,6 +1762,83 @@ int mark_cpu_present(int cpu)
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return 0;
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}
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/*
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* snapshot_proc_interrupts()
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*
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* read and record summary of /proc/interrupts
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*
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* return 1 if config change requires a restart, else return 0
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*/
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int snapshot_proc_interrupts(void)
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{
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static FILE *fp;
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int column, retval;
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if (fp == NULL)
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fp = fopen_or_die("/proc/interrupts", "r");
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else
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rewind(fp);
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/* read 1st line of /proc/interrupts to get cpu* name for each column */
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for (column = 0; column < topo.num_cpus; ++column) {
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int cpu_number;
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retval = fscanf(fp, " CPU%d", &cpu_number);
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if (retval != 1)
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break;
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if (cpu_number > topo.max_cpu_num) {
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warn("/proc/interrupts: cpu%d: > %d", cpu_number, topo.max_cpu_num);
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return 1;
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}
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irq_column_2_cpu[column] = cpu_number;
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irqs_per_cpu[cpu_number] = 0;
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}
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/* read /proc/interrupt count lines and sum up irqs per cpu */
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while (1) {
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int column;
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char buf[64];
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retval = fscanf(fp, " %s:", buf); /* flush irq# "N:" */
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if (retval != 1)
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break;
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/* read the count per cpu */
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for (column = 0; column < topo.num_cpus; ++column) {
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int cpu_number, irq_count;
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retval = fscanf(fp, " %d", &irq_count);
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if (retval != 1)
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break;
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cpu_number = irq_column_2_cpu[column];
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irqs_per_cpu[cpu_number] += irq_count;
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}
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while (getc(fp) != '\n')
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; /* flush interrupt description */
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}
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return 0;
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}
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/*
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* snapshot /proc and /sys files
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*
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* return 1 if configuration restart needed, else return 0
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*/
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int snapshot_proc_sysfs_files(void)
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{
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if (snapshot_proc_interrupts())
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return 1;
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return 0;
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}
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void turbostat_loop()
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{
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int retval;
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@ -1745,6 +1847,7 @@ void turbostat_loop()
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restart:
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restarted++;
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snapshot_proc_sysfs_files();
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retval = for_all_cpus(get_counters, EVEN_COUNTERS);
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if (retval < -1) {
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exit(retval);
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@ -1764,6 +1867,8 @@ void turbostat_loop()
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goto restart;
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}
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nanosleep(&interval_ts, NULL);
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if (snapshot_proc_sysfs_files())
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goto restart;
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retval = for_all_cpus(get_counters, ODD_COUNTERS);
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if (retval < -1) {
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exit(retval);
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@ -1778,6 +1883,8 @@ void turbostat_loop()
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format_all_counters(EVEN_COUNTERS);
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flush_output_stdout();
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nanosleep(&interval_ts, NULL);
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if (snapshot_proc_sysfs_files())
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goto restart;
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retval = for_all_cpus(get_counters, EVEN_COUNTERS);
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if (retval < -1) {
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exit(retval);
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@ -3233,9 +3340,20 @@ void allocate_fd_percpu(void)
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if (fd_percpu == NULL)
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err(-1, "calloc fd_percpu");
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}
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void allocate_irq_buffers(void)
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{
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irq_column_2_cpu = calloc(topo.num_cpus, sizeof(int));
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if (irq_column_2_cpu == NULL)
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err(-1, "calloc %d", topo.num_cpus);
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irqs_per_cpu = calloc(topo.max_cpu_num, sizeof(int));
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if (irqs_per_cpu == NULL)
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err(-1, "calloc %d", topo.max_cpu_num);
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}
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void setup_all_buffers(void)
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{
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topology_probe();
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allocate_irq_buffers();
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allocate_fd_percpu();
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allocate_counters(&thread_even, &core_even, &package_even);
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allocate_counters(&thread_odd, &core_odd, &package_odd);
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