From: Len Brown Date: Sat, 27 Feb 2016 04:48:05 +0000 (-0500) Subject: tools/power turbostat: show IRQs per CPU X-Git-Url: http://git.cdn.openwrt.org/?a=commitdiff_plain;h=562a2d377bb9882c49debc9e1be7127a1717e242;p=openwrt%2Fstaging%2Fblogic.git 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 --- diff --git a/tools/power/x86/turbostat/turbostat.c b/tools/power/x86/turbostat/turbostat.c index 2e47c2bc3e27..c6793268d81f 100644 --- a/tools/power/x86/turbostat/turbostat.c +++ b/tools/power/x86/turbostat/turbostat.c @@ -75,6 +75,7 @@ unsigned int extra_msr_offset64; unsigned int extra_delta_offset32; unsigned int extra_delta_offset64; unsigned int aperf_mperf_multiplier = 1; +int do_irq = 1; int do_smi; double bclk; double base_hz; @@ -154,6 +155,7 @@ struct thread_data { unsigned long long extra_delta64; unsigned long long extra_msr32; unsigned long long extra_delta32; + unsigned int irq_count; unsigned int smi_count; unsigned int cpu_id; unsigned int flags; @@ -221,6 +223,9 @@ struct topo_params { struct timeval tv_even, tv_odd, tv_delta; +int *irq_column_2_cpu; /* /proc/interrupts column numbers */ +int *irqs_per_cpu; /* indexed by cpu_num */ + void setup_all_buffers(void); int cpu_is_not_present(int cpu) @@ -306,8 +311,8 @@ int get_msr(int cpu, off_t offset, unsigned long long *msr) /* * Example Format w/ field column widths: * - * 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 - * 123456781234567812345678123456781234567812345678123456781234567812345678123456781234567812345678123456781234567812345678123456781234567812345678123456781234567812345678 + * 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 + * 12345678123456781234567812345678123456781234567812345678123456781234567812345678123456781234567812345678123456781234567812345678123456781234567812345678123456781234567812345678 */ void print_header(void) @@ -338,6 +343,8 @@ void print_header(void) if (!debug) goto done; + if (do_irq) + outp += sprintf(outp, " IRQ"); if (do_smi) outp += sprintf(outp, " SMI"); @@ -429,6 +436,8 @@ int dump_counters(struct thread_data *t, struct core_data *c, extra_msr_offset32, t->extra_msr32); outp += sprintf(outp, "msr0x%x: %016llX\n", extra_msr_offset64, t->extra_msr64); + if (do_irq) + outp += sprintf(outp, "IRQ: %08X\n", t->irq_count); if (do_smi) outp += sprintf(outp, "SMI: %08X\n", t->smi_count); } @@ -562,6 +571,10 @@ int format_counters(struct thread_data *t, struct core_data *c, if (!debug) goto done; + /* IRQ */ + if (do_irq) + outp += sprintf(outp, "%8d", t->irq_count); + /* SMI */ if (do_smi) outp += sprintf(outp, "%8d", t->smi_count); @@ -827,6 +840,9 @@ delta_thread(struct thread_data *new, struct thread_data *old, old->extra_msr32 = new->extra_msr32; old->extra_msr64 = new->extra_msr64; + if (do_irq) + old->irq_count = new->irq_count - old->irq_count; + if (do_smi) old->smi_count = new->smi_count - old->smi_count; } @@ -856,10 +872,12 @@ void clear_counters(struct thread_data *t, struct core_data *c, struct pkg_data t->mperf = 0; t->c1 = 0; - t->smi_count = 0; t->extra_delta32 = 0; t->extra_delta64 = 0; + t->irq_count = 0; + t->smi_count = 0; + /* tells format_counters to dump all fields from this set */ t->flags = CPU_IS_FIRST_THREAD_IN_CORE | CPU_IS_FIRST_CORE_IN_PACKAGE; @@ -903,6 +921,9 @@ int sum_counters(struct thread_data *t, struct core_data *c, average.threads.extra_delta32 += t->extra_delta32; average.threads.extra_delta64 += t->extra_delta64; + average.threads.irq_count += t->irq_count; + average.threads.smi_count += t->smi_count; + /* sum per-core values only for 1st thread in core */ if (!(t->flags & CPU_IS_FIRST_THREAD_IN_CORE)) return 0; @@ -1000,7 +1021,6 @@ static unsigned long long rdtsc(void) return low | ((unsigned long long)high) << 32; } - /* * get_counters(...) * migrate to cpu @@ -1027,6 +1047,8 @@ int get_counters(struct thread_data *t, struct core_data *c, struct pkg_data *p) t->mperf = t->mperf * aperf_mperf_multiplier; } + if (do_irq) + t->irq_count = irqs_per_cpu[cpu]; if (do_smi) { if (get_msr(cpu, MSR_SMI_COUNT, &msr)) return -5; @@ -1515,6 +1537,9 @@ void free_all_buffers(void) outp = NULL; free_fd_percpu(); + + free(irq_column_2_cpu); + free(irqs_per_cpu); } /* @@ -1737,6 +1762,83 @@ int mark_cpu_present(int cpu) return 0; } +/* + * snapshot_proc_interrupts() + * + * read and record summary of /proc/interrupts + * + * return 1 if config change requires a restart, else return 0 + */ +int snapshot_proc_interrupts(void) +{ + static FILE *fp; + int column, retval; + + if (fp == NULL) + fp = fopen_or_die("/proc/interrupts", "r"); + else + rewind(fp); + + /* read 1st line of /proc/interrupts to get cpu* name for each column */ + for (column = 0; column < topo.num_cpus; ++column) { + int cpu_number; + + retval = fscanf(fp, " CPU%d", &cpu_number); + if (retval != 1) + break; + + if (cpu_number > topo.max_cpu_num) { + warn("/proc/interrupts: cpu%d: > %d", cpu_number, topo.max_cpu_num); + return 1; + } + + irq_column_2_cpu[column] = cpu_number; + irqs_per_cpu[cpu_number] = 0; + } + + /* read /proc/interrupt count lines and sum up irqs per cpu */ + while (1) { + int column; + char buf[64]; + + retval = fscanf(fp, " %s:", buf); /* flush irq# "N:" */ + if (retval != 1) + break; + + /* read the count per cpu */ + for (column = 0; column < topo.num_cpus; ++column) { + + int cpu_number, irq_count; + + retval = fscanf(fp, " %d", &irq_count); + if (retval != 1) + break; + + cpu_number = irq_column_2_cpu[column]; + irqs_per_cpu[cpu_number] += irq_count; + + } + + while (getc(fp) != '\n') + ; /* flush interrupt description */ + + } + return 0; +} + +/* + * snapshot /proc and /sys files + * + * return 1 if configuration restart needed, else return 0 + */ +int snapshot_proc_sysfs_files(void) +{ + if (snapshot_proc_interrupts()) + return 1; + + return 0; +} + void turbostat_loop() { int retval; @@ -1745,6 +1847,7 @@ void turbostat_loop() restart: restarted++; + snapshot_proc_sysfs_files(); retval = for_all_cpus(get_counters, EVEN_COUNTERS); if (retval < -1) { exit(retval); @@ -1764,6 +1867,8 @@ restart: goto restart; } nanosleep(&interval_ts, NULL); + if (snapshot_proc_sysfs_files()) + goto restart; retval = for_all_cpus(get_counters, ODD_COUNTERS); if (retval < -1) { exit(retval); @@ -1778,6 +1883,8 @@ restart: format_all_counters(EVEN_COUNTERS); flush_output_stdout(); nanosleep(&interval_ts, NULL); + if (snapshot_proc_sysfs_files()) + goto restart; retval = for_all_cpus(get_counters, EVEN_COUNTERS); if (retval < -1) { exit(retval); @@ -3233,9 +3340,20 @@ void allocate_fd_percpu(void) if (fd_percpu == NULL) err(-1, "calloc fd_percpu"); } +void allocate_irq_buffers(void) +{ + irq_column_2_cpu = calloc(topo.num_cpus, sizeof(int)); + if (irq_column_2_cpu == NULL) + err(-1, "calloc %d", topo.num_cpus); + + irqs_per_cpu = calloc(topo.max_cpu_num, sizeof(int)); + if (irqs_per_cpu == NULL) + err(-1, "calloc %d", topo.max_cpu_num); +} void setup_all_buffers(void) { topology_probe(); + allocate_irq_buffers(); allocate_fd_percpu(); allocate_counters(&thread_even, &core_even, &package_even); allocate_counters(&thread_odd, &core_odd, &package_odd);