diff options
Diffstat (limited to 'tools/power/x86/turbostat/turbostat.c')
| -rw-r--r-- | tools/power/x86/turbostat/turbostat.c | 1048 |
1 files changed, 1048 insertions, 0 deletions
diff --git a/tools/power/x86/turbostat/turbostat.c b/tools/power/x86/turbostat/turbostat.c new file mode 100644 index 00000000000..4c6983de6fd --- /dev/null +++ b/tools/power/x86/turbostat/turbostat.c @@ -0,0 +1,1048 @@ +/* + * turbostat -- show CPU frequency and C-state residency + * on modern Intel turbo-capable processors. + * + * Copyright (c) 2010, Intel Corporation. + * Len Brown <len.brown@intel.com> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + * You should have received a copy of the GNU General Public License along with + * this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#include <stdio.h> +#include <unistd.h> +#include <sys/types.h> +#include <sys/wait.h> +#include <sys/stat.h> +#include <sys/resource.h> +#include <fcntl.h> +#include <signal.h> +#include <sys/time.h> +#include <stdlib.h> +#include <dirent.h> +#include <string.h> +#include <ctype.h> + +#define MSR_TSC 0x10 +#define MSR_NEHALEM_PLATFORM_INFO 0xCE +#define MSR_NEHALEM_TURBO_RATIO_LIMIT 0x1AD +#define MSR_APERF 0xE8 +#define MSR_MPERF 0xE7 +#define MSR_PKG_C2_RESIDENCY 0x60D /* SNB only */ +#define MSR_PKG_C3_RESIDENCY 0x3F8 +#define MSR_PKG_C6_RESIDENCY 0x3F9 +#define MSR_PKG_C7_RESIDENCY 0x3FA /* SNB only */ +#define MSR_CORE_C3_RESIDENCY 0x3FC +#define MSR_CORE_C6_RESIDENCY 0x3FD +#define MSR_CORE_C7_RESIDENCY 0x3FE /* SNB only */ + +char *proc_stat = "/proc/stat"; +unsigned int interval_sec = 5; /* set with -i interval_sec */ +unsigned int verbose; /* set with -v */ +unsigned int skip_c0; +unsigned int skip_c1; +unsigned int do_nhm_cstates; +unsigned int do_snb_cstates; +unsigned int has_aperf; +unsigned int units = 1000000000; /* Ghz etc */ +unsigned int genuine_intel; +unsigned int has_invariant_tsc; +unsigned int do_nehalem_platform_info; +unsigned int do_nehalem_turbo_ratio_limit; +unsigned int extra_msr_offset; +double bclk; +unsigned int show_pkg; +unsigned int show_core; +unsigned int show_cpu; + +int aperf_mperf_unstable; +int backwards_count; +char *progname; +int need_reinitialize; + +int num_cpus; + +typedef struct per_cpu_counters { + unsigned long long tsc; /* per thread */ + unsigned long long aperf; /* per thread */ + unsigned long long mperf; /* per thread */ + unsigned long long c1; /* per thread (calculated) */ + unsigned long long c3; /* per core */ + unsigned long long c6; /* per core */ + unsigned long long c7; /* per core */ + unsigned long long pc2; /* per package */ + unsigned long long pc3; /* per package */ + unsigned long long pc6; /* per package */ + unsigned long long pc7; /* per package */ + unsigned long long extra_msr; /* per thread */ + int pkg; + int core; + int cpu; + struct per_cpu_counters *next; +} PCC; + +PCC *pcc_even; +PCC *pcc_odd; +PCC *pcc_delta; +PCC *pcc_average; +struct timeval tv_even; +struct timeval tv_odd; +struct timeval tv_delta; + +unsigned long long get_msr(int cpu, off_t offset) +{ + ssize_t retval; + unsigned long long msr; + char pathname[32]; + int fd; + + sprintf(pathname, "/dev/cpu/%d/msr", cpu); + fd = open(pathname, O_RDONLY); + if (fd < 0) { + perror(pathname); + need_reinitialize = 1; + return 0; + } + + retval = pread(fd, &msr, sizeof msr, offset); + if (retval != sizeof msr) { + fprintf(stderr, "cpu%d pread(..., 0x%zx) = %jd\n", + cpu, offset, retval); + exit(-2); + } + + close(fd); + return msr; +} + +void print_header() +{ + if (show_pkg) + fprintf(stderr, "pkg "); + if (show_core) + fprintf(stderr, "core"); + if (show_cpu) + fprintf(stderr, " CPU"); + if (do_nhm_cstates) + fprintf(stderr, " %%c0 "); + if (has_aperf) + fprintf(stderr, " GHz"); + fprintf(stderr, " TSC"); + if (do_nhm_cstates) + fprintf(stderr, " %%c1 "); + if (do_nhm_cstates) + fprintf(stderr, " %%c3 "); + if (do_nhm_cstates) + fprintf(stderr, " %%c6 "); + if (do_snb_cstates) + fprintf(stderr, " %%c7 "); + if (do_snb_cstates) + fprintf(stderr, " %%pc2 "); + if (do_nhm_cstates) + fprintf(stderr, " %%pc3 "); + if (do_nhm_cstates) + fprintf(stderr, " %%pc6 "); + if (do_snb_cstates) + fprintf(stderr, " %%pc7 "); + if (extra_msr_offset) + fprintf(stderr, " MSR 0x%x ", extra_msr_offset); + + putc('\n', stderr); +} + +void dump_pcc(PCC *pcc) +{ + fprintf(stderr, "package: %d ", pcc->pkg); + fprintf(stderr, "core:: %d ", pcc->core); + fprintf(stderr, "CPU: %d ", pcc->cpu); + fprintf(stderr, "TSC: %016llX\n", pcc->tsc); + fprintf(stderr, "c3: %016llX\n", pcc->c3); + fprintf(stderr, "c6: %016llX\n", pcc->c6); + fprintf(stderr, "c7: %016llX\n", pcc->c7); + fprintf(stderr, "aperf: %016llX\n", pcc->aperf); + fprintf(stderr, "pc2: %016llX\n", pcc->pc2); + fprintf(stderr, "pc3: %016llX\n", pcc->pc3); + fprintf(stderr, "pc6: %016llX\n", pcc->pc6); + fprintf(stderr, "pc7: %016llX\n", pcc->pc7); + fprintf(stderr, "msr0x%x: %016llX\n", extra_msr_offset, pcc->extra_msr); +} + +void dump_list(PCC *pcc) +{ + printf("dump_list 0x%p\n", pcc); + + for (; pcc; pcc = pcc->next) + dump_pcc(pcc); +} + +void print_pcc(PCC *p) +{ + double interval_float; + + interval_float = tv_delta.tv_sec + tv_delta.tv_usec/1000000.0; + + /* topology columns, print blanks on 1st (average) line */ + if (p == pcc_average) { + if (show_pkg) + fprintf(stderr, " "); + if (show_core) + fprintf(stderr, " "); + if (show_cpu) + fprintf(stderr, " "); + } else { + if (show_pkg) + fprintf(stderr, "%4d", p->pkg); + if (show_core) + fprintf(stderr, "%4d", p->core); + if (show_cpu) + fprintf(stderr, "%4d", p->cpu); + } + + /* %c0 */ + if (do_nhm_cstates) { + if (!skip_c0) + fprintf(stderr, "%7.2f", 100.0 * p->mperf/p->tsc); + else + fprintf(stderr, " ****"); + } + + /* GHz */ + if (has_aperf) { + if (!aperf_mperf_unstable) { + fprintf(stderr, "%5.2f", + 1.0 * p->tsc / units * p->aperf / + p->mperf / interval_float); + } else { + if (p->aperf > p->tsc || p->mperf > p->tsc) { + fprintf(stderr, " ****"); + } else { + fprintf(stderr, "%4.1f*", + 1.0 * p->tsc / + units * p->aperf / + p->mperf / interval_float); + } + } + } + + /* TSC */ + fprintf(stderr, "%5.2f", 1.0 * p->tsc/units/interval_float); + + if (do_nhm_cstates) { + if (!skip_c1) + fprintf(stderr, "%7.2f", 100.0 * p->c1/p->tsc); + else + fprintf(stderr, " ****"); + } + if (do_nhm_cstates) + fprintf(stderr, "%7.2f", 100.0 * p->c3/p->tsc); + if (do_nhm_cstates) + fprintf(stderr, "%7.2f", 100.0 * p->c6/p->tsc); + if (do_snb_cstates) + fprintf(stderr, "%7.2f", 100.0 * p->c7/p->tsc); + if (do_snb_cstates) + fprintf(stderr, "%7.2f", 100.0 * p->pc2/p->tsc); + if (do_nhm_cstates) + fprintf(stderr, "%7.2f", 100.0 * p->pc3/p->tsc); + if (do_nhm_cstates) + fprintf(stderr, "%7.2f", 100.0 * p->pc6/p->tsc); + if (do_snb_cstates) + fprintf(stderr, "%7.2f", 100.0 * p->pc7/p->tsc); + if (extra_msr_offset) + fprintf(stderr, " 0x%016llx", p->extra_msr); + putc('\n', stderr); +} + +void print_counters(PCC *cnt) +{ + PCC *pcc; + + print_header(); + + if (num_cpus > 1) + print_pcc(pcc_average); + + for (pcc = cnt; pcc != NULL; pcc = pcc->next) + print_pcc(pcc); + +} + +#define SUBTRACT_COUNTER(after, before, delta) (delta = (after - before), (before > after)) + + +int compute_delta(PCC *after, PCC *before, PCC *delta) +{ + int errors = 0; + int perf_err = 0; + + skip_c0 = skip_c1 = 0; + + for ( ; after && before && delta; + after = after->next, before = before->next, delta = delta->next) { + if (before->cpu != after->cpu) { + printf("cpu configuration changed: %d != %d\n", + before->cpu, after->cpu); + return -1; + } + + if (SUBTRACT_COUNTER(after->tsc, before->tsc, delta->tsc)) { + fprintf(stderr, "cpu%d TSC went backwards %llX to %llX\n", + before->cpu, before->tsc, after->tsc); + errors++; + } + /* check for TSC < 1 Mcycles over interval */ + if (delta->tsc < (1000 * 1000)) { + fprintf(stderr, "Insanely slow TSC rate," + " TSC stops in idle?\n"); + fprintf(stderr, "You can disable all c-states" + " by booting with \"idle=poll\"\n"); + fprintf(stderr, "or just the deep ones with" + " \"processor.max_cstate=1\"\n"); + exit(-3); + } + if (SUBTRACT_COUNTER(after->c3, before->c3, delta->c3)) { + fprintf(stderr, "cpu%d c3 counter went backwards %llX to %llX\n", + before->cpu, before->c3, after->c3); + errors++; + } + if (SUBTRACT_COUNTER(after->c6, before->c6, delta->c6)) { + fprintf(stderr, "cpu%d c6 counter went backwards %llX to %llX\n", + before->cpu, before->c6, after->c6); + errors++; + } + if (SUBTRACT_COUNTER(after->c7, before->c7, delta->c7)) { + fprintf(stderr, "cpu%d c7 counter went backwards %llX to %llX\n", + before->cpu, before->c7, after->c7); + errors++; + } + if (SUBTRACT_COUNTER(after->pc2, before->pc2, delta->pc2)) { + fprintf(stderr, "cpu%d pc2 counter went backwards %llX to %llX\n", + before->cpu, before->pc2, after->pc2); + errors++; + } + if (SUBTRACT_COUNTER(after->pc3, before->pc3, delta->pc3)) { + fprintf(stderr, "cpu%d pc3 counter went backwards %llX to %llX\n", + before->cpu, before->pc3, after->pc3); + errors++; + } + if (SUBTRACT_COUNTER(after->pc6, before->pc6, delta->pc6)) { + fprintf(stderr, "cpu%d pc6 counter went backwards %llX to %llX\n", + before->cpu, before->pc6, after->pc6); + errors++; + } + if (SUBTRACT_COUNTER(after->pc7, before->pc7, delta->pc7)) { + fprintf(stderr, "cpu%d pc7 counter went backwards %llX to %llX\n", + before->cpu, before->pc7, after->pc7); + errors++; + } + + perf_err = SUBTRACT_COUNTER(after->aperf, before->aperf, delta->aperf); + if (perf_err) { + fprintf(stderr, "cpu%d aperf counter went backwards %llX to %llX\n", + before->cpu, before->aperf, after->aperf); + } + perf_err |= SUBTRACT_COUNTER(after->mperf, before->mperf, delta->mperf); + if (perf_err) { + fprintf(stderr, "cpu%d mperf counter went backwards %llX to %llX\n", + before->cpu, before->mperf, after->mperf); + } + if (perf_err) { + if (!aperf_mperf_unstable) { + fprintf(stderr, "%s: APERF or MPERF went backwards *\n", progname); + fprintf(stderr, "* Frequency results do not cover entire interval *\n"); + fprintf(stderr, "* fix this by running Linux-2.6.30 or later *\n"); + + aperf_mperf_unstable = 1; + } + /* + * mperf delta is likely a huge "positive" number + * can not use it for calculating c0 time + */ + skip_c0 = 1; + skip_c1 = 1; + } + + /* + * As mperf and tsc collection are not atomic, + * it is possible for mperf's non-halted cycles + * to exceed TSC's all cycles: show c1 = 0% in that case. + */ + if (delta->mperf > delta->tsc) + delta->c1 = 0; + else /* normal case, derive c1 */ + delta->c1 = delta->tsc - delta->mperf + - delta->c3 - delta->c6 - delta->c7; + + if (delta->mperf == 0) + delta->mperf = 1; /* divide by 0 protection */ + + /* + * for "extra msr", just copy the latest w/o subtracting + */ + delta->extra_msr = after->extra_msr; + if (errors) { + fprintf(stderr, "ERROR cpu%d before:\n", before->cpu); + dump_pcc(before); + fprintf(stderr, "ERROR cpu%d after:\n", before->cpu); + dump_pcc(after); + errors = 0; + } + } + return 0; +} + +void compute_average(PCC *delta, PCC *avg) +{ + PCC *sum; + + sum = calloc(1, sizeof(PCC)); + if (sum == NULL) { + perror("calloc sum"); + exit(1); + } + + for (; delta; delta = delta->next) { + sum->tsc += delta->tsc; + sum->c1 += delta->c1; + sum->c3 += delta->c3; + sum->c6 += delta->c6; + sum->c7 += delta->c7; + sum->aperf += delta->aperf; + sum->mperf += delta->mperf; + sum->pc2 += delta->pc2; + sum->pc3 += delta->pc3; + sum->pc6 += delta->pc6; + sum->pc7 += delta->pc7; + } + avg->tsc = sum->tsc/num_cpus; + avg->c1 = sum->c1/num_cpus; + avg->c3 = sum->c3/num_cpus; + avg->c6 = sum->c6/num_cpus; + avg->c7 = sum->c7/num_cpus; + avg->aperf = sum->aperf/num_cpus; + avg->mperf = sum->mperf/num_cpus; + avg->pc2 = sum->pc2/num_cpus; + avg->pc3 = sum->pc3/num_cpus; + avg->pc6 = sum->pc6/num_cpus; + avg->pc7 = sum->pc7/num_cpus; + + free(sum); +} + +void get_counters(PCC *pcc) +{ + for ( ; pcc; pcc = pcc->next) { + pcc->tsc = get_msr(pcc->cpu, MSR_TSC); + if (do_nhm_cstates) + pcc->c3 = get_msr(pcc->cpu, MSR_CORE_C3_RESIDENCY); + if (do_nhm_cstates) + pcc->c6 = get_msr(pcc->cpu, MSR_CORE_C6_RESIDENCY); + if (do_snb_cstates) + pcc->c7 = get_msr(pcc->cpu, MSR_CORE_C7_RESIDENCY); + if (has_aperf) + pcc->aperf = get_msr(pcc->cpu, MSR_APERF); + if (has_aperf) + pcc->mperf = get_msr(pcc->cpu, MSR_MPERF); + if (do_snb_cstates) + pcc->pc2 = get_msr(pcc->cpu, MSR_PKG_C2_RESIDENCY); + if (do_nhm_cstates) + pcc->pc3 = get_msr(pcc->cpu, MSR_PKG_C3_RESIDENCY); + if (do_nhm_cstates) + pcc->pc6 = get_msr(pcc->cpu, MSR_PKG_C6_RESIDENCY); + if (do_snb_cstates) + pcc->pc7 = get_msr(pcc->cpu, MSR_PKG_C7_RESIDENCY); + if (extra_msr_offset) + pcc->extra_msr = get_msr(pcc->cpu, extra_msr_offset); + } +} + + +void print_nehalem_info() +{ + unsigned long long msr; + unsigned int ratio; + + if (!do_nehalem_platform_info) + return; + + msr = get_msr(0, MSR_NEHALEM_PLATFORM_INFO); + + ratio = (msr >> 40) & 0xFF; + fprintf(stderr, "%d * %.0f = %.0f MHz max efficiency\n", + ratio, bclk, ratio * bclk); + + ratio = (msr >> 8) & 0xFF; + fprintf(stderr, "%d * %.0f = %.0f MHz TSC frequency\n", + ratio, bclk, ratio * bclk); + + if (verbose > 1) + fprintf(stderr, "MSR_NEHALEM_PLATFORM_INFO: 0x%llx\n", msr); + + if (!do_nehalem_turbo_ratio_limit) + return; + + msr = get_msr(0, MSR_NEHALEM_TURBO_RATIO_LIMIT); + + ratio = (msr >> 24) & 0xFF; + if (ratio) + fprintf(stderr, "%d * %.0f = %.0f MHz max turbo 4 active cores\n", + ratio, bclk, ratio * bclk); + + ratio = (msr >> 16) & 0xFF; + if (ratio) + fprintf(stderr, "%d * %.0f = %.0f MHz max turbo 3 active cores\n", + ratio, bclk, ratio * bclk); + + ratio = (msr >> 8) & 0xFF; + if (ratio) + fprintf(stderr, "%d * %.0f = %.0f MHz max turbo 2 active cores\n", + ratio, bclk, ratio * bclk); + + ratio = (msr >> 0) & 0xFF; + if (ratio) + fprintf(stderr, "%d * %.0f = %.0f MHz max turbo 1 active cores\n", + ratio, bclk, ratio * bclk); + +} + +void free_counter_list(PCC *list) +{ + PCC *p; + + for (p = list; p; ) { + PCC *free_me; + + free_me = p; + p = p->next; + free(free_me); + } + return; +} + +void free_all_counters(void) +{ + free_counter_list(pcc_even); + pcc_even = NULL; + + free_counter_list(pcc_odd); + pcc_odd = NULL; + + free_counter_list(pcc_delta); + pcc_delta = NULL; + + free_counter_list(pcc_average); + pcc_average = NULL; +} + +void insert_cpu_counters(PCC **list, PCC *new) +{ + PCC *prev; + + /* + * list was empty + */ + if (*list == NULL) { + new->next = *list; + *list = new; + return; + } + + show_cpu = 1; /* there is more than one CPU */ + + /* + * insert on front of list. + * It is sorted by ascending package#, core#, cpu# + */ + if (((*list)->pkg > new->pkg) || + (((*list)->pkg == new->pkg) && ((*list)->core > new->core)) || + (((*list)->pkg == new->pkg) && ((*list)->core == new->core) && ((*list)->cpu > new->cpu))) { + new->next = *list; + *list = new; + return; + } + + prev = *list; + + while (prev->next && (prev->next->pkg < new->pkg)) { + prev = prev->next; + show_pkg = 1; /* there is more than 1 package */ + } + + while (prev->next && (prev->next->pkg == new->pkg) + && (prev->next->core < new->core)) { + prev = prev->next; + show_core = 1; /* there is more than 1 core */ + } + + while (prev->next && (prev->next->pkg == new->pkg) + && (prev->next->core == new->core) + && (prev->next->cpu < new->cpu)) { + prev = prev->next; + } + + /* + * insert after "prev" + */ + new->next = prev->next; + prev->next = new; + + return; +} + +void alloc_new_cpu_counters(int pkg, int core, int cpu) +{ + PCC *new; + + if (verbose > 1) + printf("pkg%d core%d, cpu%d\n", pkg, core, cpu); + + new = (PCC *)calloc(1, sizeof(PCC)); + if (new == NULL) { + perror("calloc"); + exit(1); + } + new->pkg = pkg; + new->core = core; + new->cpu = cpu; + insert_cpu_counters(&pcc_odd, new); + + new = (PCC *)calloc(1, sizeof(PCC)); + if (new == NULL) { + perror("calloc"); + exit(1); + } + new->pkg = pkg; + new->core = core; + new->cpu = cpu; + insert_cpu_counters(&pcc_even, new); + + new = (PCC *)calloc(1, sizeof(PCC)); + if (new == NULL) { + perror("calloc"); + exit(1); + } + new->pkg = pkg; + new->core = core; + new->cpu = cpu; + insert_cpu_counters(&pcc_delta, new); + + new = (PCC *)calloc(1, sizeof(PCC)); + if (new == NULL) { + perror("calloc"); + exit(1); + } + new->pkg = pkg; + new->core = core; + new->cpu = cpu; + pcc_average = new; +} + +int get_physical_package_id(int cpu) +{ + char path[64]; + FILE *filep; + int pkg; + + sprintf(path, "/sys/devices/system/cpu/cpu%d/topology/physical_package_id", cpu); + filep = fopen(path, "r"); + if (filep == NULL) { + perror(path); + exit(1); + } + fscanf(filep, "%d", &pkg); + fclose(filep); + return pkg; +} + +int get_core_id(int cpu) +{ + char path[64]; + FILE *filep; + int core; + + sprintf(path, "/sys/devices/system/cpu/cpu%d/topology/core_id", cpu); + filep = fopen(path, "r"); + if (filep == NULL) { + perror(path); + exit(1); + } + fscanf(filep, "%d", &core); + fclose(filep); + return core; +} + +/* + * run func(index, cpu) on every cpu in /proc/stat + */ + +int for_all_cpus(void (func)(int, int, int)) +{ + FILE *fp; + int cpu_count; + int retval; + + fp = fopen(proc_stat, "r"); + if (fp == NULL) { + perror(proc_stat); + exit(1); + } + + retval = fscanf(fp, "cpu %*d %*d %*d %*d %*d %*d %*d %*d %*d %*d\n"); + if (retval != 0) { + perror("/proc/stat format"); + exit(1); + } + + for (cpu_count = 0; ; cpu_count++) { + int cpu; + + retval = fscanf(fp, "cpu%u %*d %*d %*d %*d %*d %*d %*d %*d %*d %*d\n", &cpu); + if (retval != 1) + break; + + func(get_physical_package_id(cpu), get_core_id(cpu), cpu); + } + fclose(fp); + return cpu_count; +} + +void re_initialize(void) +{ + printf("turbostat: topology changed, re-initializing.\n"); + free_all_counters(); + num_cpus = for_all_cpus(alloc_new_cpu_counters); + need_reinitialize = 0; + printf("num_cpus is now %d\n", num_cpus); +} + +void dummy(int pkg, int core, int cpu) { return; } +/* + * check to see if a cpu came on-line + */ +void verify_num_cpus() +{ + int new_num_cpus; + + new_num_cpus = for_all_cpus(dummy); + + if (new_num_cpus != num_cpus) { + if (verbose) + printf("num_cpus was %d, is now %d\n", + num_cpus, new_num_cpus); + need_reinitialize = 1; + } + + return; +} + +void turbostat_loop() +{ +restart: + get_counters(pcc_even); + gettimeofday(&tv_even, (struct timezone *)NULL); + + while (1) { + verify_num_cpus(); + if (need_reinitialize) { + re_initialize(); + goto restart; + } + sleep(interval_sec); + get_counters(pcc_odd); + gettimeofday(&tv_odd, (struct timezone *)NULL); + + compute_delta(pcc_odd, pcc_even, pcc_delta); + timersub(&tv_odd, &tv_even, &tv_delta); + compute_average(pcc_delta, pcc_average); + print_counters(pcc_delta); + if (need_reinitialize) { + re_initialize(); + goto restart; + } + sleep(interval_sec); + get_counters(pcc_even); + gettimeofday(&tv_even, (struct timezone *)NULL); + compute_delta(pcc_even, pcc_odd, pcc_delta); + timersub(&tv_even, &tv_odd, &tv_delta); + compute_average(pcc_delta, pcc_average); + print_counters(pcc_delta); + } +} + +void check_dev_msr() +{ + struct stat sb; + + if (stat("/dev/cpu/0/msr", &sb)) { + fprintf(stderr, "no /dev/cpu/0/msr\n"); + fprintf(stderr, "Try \"# modprobe msr\"\n"); + exit(-5); + } +} + +void check_super_user() +{ + if (getuid() != 0) { + fprintf(stderr, "must be root\n"); + exit(-6); + } +} + +int has_nehalem_turbo_ratio_limit(unsigned int family, unsigned int model) +{ + if (!genuine_intel) + return 0; + + if (family != 6) + return 0; + + switch (model) { + case 0x1A: /* Core i7, Xeon 5500 series - Bloomfield, Gainstown NHM-EP */ + case 0x1E: /* Core i7 and i5 Processor - Clarksfield, Lynnfield, Jasper Forest */ + case 0x1F: /* Core i7 and i5 Processor - Nehalem */ + case 0x25: /* Westmere Client - Clarkdale, Arrandale */ + case 0x2C: /* Westmere EP - Gulftown */ + case 0x2A: /* SNB */ + case 0x2D: /* SNB Xeon */ + return 1; + case 0x2E: /* Nehalem-EX Xeon - Beckton */ + case 0x2F: /* Westmere-EX Xeon - Eagleton */ + default: + return 0; + } +} + +int is_snb(unsigned int family, unsigned int model) +{ + if (!genuine_intel) + return 0; + + switch (model) { + case 0x2A: + case 0x2D: + return 1; + } + return 0; +} + +double discover_bclk(unsigned int family, unsigned int model) +{ + if (is_snb(family, model)) + return 100.00; + else + return 133.33; +} + +void check_cpuid() +{ + unsigned int eax, ebx, ecx, edx, max_level; + unsigned int fms, family, model, stepping; + + eax = ebx = ecx = edx = 0; + + asm("cpuid" : "=a" (max_level), "=b" (ebx), "=c" (ecx), "=d" (edx) : "a" (0)); + + if (ebx == 0x756e6547 && edx == 0x49656e69 && ecx == 0x6c65746e) + genuine_intel = 1; + + if (verbose) + fprintf(stderr, "%.4s%.4s%.4s ", + (char *)&ebx, (char *)&edx, (char *)&ecx); + + asm("cpuid" : "=a" (fms), "=c" (ecx), "=d" (edx) : "a" (1) : "ebx"); + family = (fms >> 8) & 0xf; + model = (fms >> 4) & 0xf; + stepping = fms & 0xf; + if (family == 6 || family == 0xf) + model += ((fms >> 16) & 0xf) << 4; + + if (verbose) + fprintf(stderr, "%d CPUID levels; family:model:stepping 0x%x:%x:%x (%d:%d:%d)\n", + max_level, family, model, stepping, family, model, stepping); + + if (!(edx & (1 << 5))) { + fprintf(stderr, "CPUID: no MSR\n"); + exit(1); + } + + /* + * check max extended function levels of CPUID. + * This is needed to check for invariant TSC. + * This check is valid for both Intel and AMD. + */ + ebx = ecx = edx = 0; + asm("cpuid" : "=a" (max_level), "=b" (ebx), "=c" (ecx), "=d" (edx) : "a" (0x80000000)); + + if (max_level < 0x80000007) { + fprintf(stderr, "CPUID: no invariant TSC (max_level 0x%x)\n", max_level); + exit(1); + } + + /* + * Non-Stop TSC is advertised by CPUID.EAX=0x80000007: EDX.bit8 + * this check is valid for both Intel and AMD + */ + asm("cpuid" : "=a" (eax), "=b" (ebx), "=c" (ecx), "=d" (edx) : "a" (0x80000007)); + has_invariant_tsc = edx && (1 << 8); + + if (!has_invariant_tsc) { + fprintf(stderr, "No invariant TSC\n"); + exit(1); + } + + /* + * APERF/MPERF is advertised by CPUID.EAX=0x6: ECX.bit0 + * this check is valid for both Intel and AMD + */ + + asm("cpuid" : "=a" (eax), "=b" (ebx), "=c" (ecx), "=d" (edx) : "a" (0x6)); + has_aperf = ecx && (1 << 0); + if (!has_aperf) { + fprintf(stderr, "No APERF MSR\n"); + exit(1); + } + + do_nehalem_platform_info = genuine_intel && has_invariant_tsc; + do_nhm_cstates = genuine_intel; /* all Intel w/ non-stop TSC have NHM counters */ + do_snb_cstates = is_snb(family, model); + bclk = discover_bclk(family, model); + + do_nehalem_turbo_ratio_limit = has_nehalem_turbo_ratio_limit(family, model); +} + + +void usage() +{ + fprintf(stderr, "%s: [-v] [-M MSR#] [-i interval_sec | command ...]\n", + progname); + exit(1); +} + + +/* + * in /dev/cpu/ return success for names that are numbers + * ie. filter out ".", "..", "microcode". + */ +int dir_filter(const struct dirent *dirp) +{ + if (isdigit(dirp->d_name[0])) + return 1; + else + return 0; +} + +int open_dev_cpu_msr(int dummy1) +{ + return 0; +} + +void turbostat_init() +{ + check_cpuid(); + + check_dev_msr(); + check_super_user(); + + num_cpus = for_all_cpus(alloc_new_cpu_counters); + + if (verbose) + print_nehalem_info(); +} + +int fork_it(char **argv) +{ + int retval; + pid_t child_pid; + get_counters(pcc_even); + gettimeofday(&tv_even, (struct timezone *)NULL); + + child_pid = fork(); + if (!child_pid) { + /* child */ + execvp(argv[0], argv); + } else { + int status; + + /* parent */ + if (child_pid == -1) { + perror("fork"); + exit(1); + } + + signal(SIGINT, SIG_IGN); + signal(SIGQUIT, SIG_IGN); + if (waitpid(child_pid, &status, 0) == -1) { + perror("wait"); + exit(1); + } + } + get_counters(pcc_odd); + gettimeofday(&tv_odd, (struct timezone *)NULL); + retval = compute_delta(pcc_odd, pcc_even, pcc_delta); + + timersub(&tv_odd, &tv_even, &tv_delta); + compute_average(pcc_delta, pcc_average); + if (!retval) + print_counters(pcc_delta); + + fprintf(stderr, "%.6f sec\n", tv_delta.tv_sec + tv_delta.tv_usec/1000000.0);; + + return 0; +} + +void cmdline(int argc, char **argv) +{ + int opt; + + progname = argv[0]; + + while ((opt = getopt(argc, argv, "+vi:M:")) != -1) { + switch (opt) { + case 'v': + verbose++; + break; + case 'i': + interval_sec = atoi(optarg); + break; + case 'M': + sscanf(optarg, "%x", &extra_msr_offset); + if (verbose > 1) + fprintf(stderr, "MSR 0x%X\n", extra_msr_offset); + break; + default: + usage(); + } + } +} + +int main(int argc, char **argv) +{ + cmdline(argc, argv); + + if (verbose > 1) + fprintf(stderr, "turbostat Dec 6, 2010" + " - Len Brown <lenb@kernel.org>\n"); + if (verbose > 1) + fprintf(stderr, "http://userweb.kernel.org/~lenb/acpi/utils/pmtools/turbostat/\n"); + + turbostat_init(); + + /* + * if any params left, it must be a command to fork + */ + if (argc - optind) + return fork_it(argv + optind); + else + turbostat_loop(); + + return 0; +} |