/* For general debugging purposes */ #include "../perf.h" #include #include #include #include #include #include "cache.h" #include "color.h" #include "event.h" #include "debug.h" #include "util.h" #include "target.h" int verbose; bool dump_trace = false, quiet = false; int debug_ordered_events; static int redirect_to_stderr; int debug_data_convert; int veprintf(int level, int var, const char *fmt, va_list args) { int ret = 0; if (var >= level) { if (use_browser >= 1 && !redirect_to_stderr) ui_helpline__vshow(fmt, args); else ret = vfprintf(stderr, fmt, args); } return ret; } int eprintf(int level, int var, const char *fmt, ...) { va_list args; int ret; va_start(args, fmt); ret = veprintf(level, var, fmt, args); va_end(args); return ret; } static int veprintf_time(u64 t, const char *fmt, va_list args) { int ret = 0; u64 secs, usecs, nsecs = t; secs = nsecs / NSEC_PER_SEC; nsecs -= secs * NSEC_PER_SEC; usecs = nsecs / NSEC_PER_USEC; ret = fprintf(stderr, "[%13" PRIu64 ".%06" PRIu64 "] ", secs, usecs); ret += vfprintf(stderr, fmt, args); return ret; } int eprintf_time(int level, int var, u64 t, const char *fmt, ...) { int ret = 0; va_list args; if (var >= level) { va_start(args, fmt); ret = veprintf_time(t, fmt, args); va_end(args); } return ret; } /* * Overloading libtraceevent standard info print * function, display with -v in perf. */ void pr_stat(const char *fmt, ...) { va_list args; va_start(args, fmt); veprintf(1, verbose, fmt, args); va_end(args); eprintf(1, verbose, "\n"); } int dump_printf(const char *fmt, ...) { va_list args; int ret = 0; if (dump_trace) { va_start(args, fmt); ret = vprintf(fmt, args); va_end(args); } return ret; } static void trace_event_printer(enum binary_printer_ops op, unsigned int val, void *extra) { const char *color = PERF_COLOR_BLUE; union perf_event *event = (union perf_event *)extra; unsigned char ch = (unsigned char)val; switch (op) { case BINARY_PRINT_DATA_BEGIN: printf("."); color_fprintf(stdout, color, "\n. ... raw event: size %d bytes\n", event->header.size); break; case BINARY_PRINT_LINE_BEGIN: printf("."); break; case BINARY_PRINT_ADDR: color_fprintf(stdout, color, " %04x: ", val); break; case BINARY_PRINT_NUM_DATA: color_fprintf(stdout, color, " %02x", val); break; case BINARY_PRINT_NUM_PAD: color_fprintf(stdout, color, " "); break; case BINARY_PRINT_SEP: color_fprintf(stdout, color, " "); break; case BINARY_PRINT_CHAR_DATA: color_fprintf(stdout, color, "%c", isprint(ch) ? ch : '.'); break; case BINARY_PRINT_CHAR_PAD: color_fprintf(stdout, color, " "); break; case BINARY_PRINT_LINE_END: color_fprintf(stdout, color, "\n"); break; case BINARY_PRINT_DATA_END: printf("\n"); break; default: break; } } void trace_event(union perf_event *event) { unsigned char *raw_event = (void *)event; if (!dump_trace) return; print_binary(raw_event, event->header.size, 16, trace_event_printer, event); } static struct debug_variable { const char *name; int *ptr; } debug_variables[] = { { .name = "verbose", .ptr = &verbose }, { .name = "ordered-events", .ptr = &debug_ordered_events}, { .name = "stderr", .ptr = &redirect_to_stderr}, { .name = "data-convert", .ptr = &debug_data_convert }, { .name = NULL, } }; int perf_debug_option(const char *str) { struct debug_variable *var = &debug_variables[0]; char *vstr, *s = strdup(str); int v = 1; vstr = strchr(s, '='); if (vstr) *vstr++ = 0; while (var->name) { if (!strcmp(s, var->name)) break; var++; } if (!var->name) { pr_err("Unknown debug variable name '%s'\n", s); free(s); return -1; } if (vstr) { v = atoi(vstr); /* * Allow only values in range (0, 10), * otherwise set 0. */ v = (v < 0) || (v > 10) ? 0 : v; } *var->ptr = v; free(s); return 0; } #define DEBUG_WRAPPER(__n, __l) \ static int pr_ ## __n ## _wrapper(const char *fmt, ...) \ { \ va_list args; \ int ret; \ \ va_start(args, fmt); \ ret = veprintf(__l, verbose, fmt, args); \ va_end(args); \ return ret; \ } DEBUG_WRAPPER(warning, 0); DEBUG_WRAPPER(debug, 1); void perf_debug_setup(void) { libapi_set_print(pr_warning_wrapper, pr_warning_wrapper, pr_debug_wrapper); } bel'>mode:
authorSrinivas Pandruvada <srinivas.pandruvada@linux.intel.com>2017-02-03 14:18:39 -0800
committerRafael J. Wysocki <rafael.j.wysocki@intel.com>2017-02-04 00:11:08 +0100
commit6e978b22efa1db9f6e71b24440b5f1d93e968ee3 (patch)
treec666f7a26b860674848949e39a610222b0723f89 /include/dt-bindings/pinctrl/am33xx.h
parent3c223c19aea85d3dda1416c187915f4a30b04b1f (diff)
cpufreq: intel_pstate: Disable energy efficiency optimization
Some Kabylake desktop processors may not reach max turbo when running in HWP mode, even if running under sustained 100% utilization. This occurs when the HWP.EPP (Energy Performance Preference) is set to "balance_power" (0x80) -- the default on most systems. It occurs because the platform BIOS may erroneously enable an energy-efficiency setting -- MSR_IA32_POWER_CTL BIT-EE, which is not recommended to be enabled on this SKU. On the failing systems, this BIOS issue was not discovered when the desktop motherboard was tested with Windows, because the BIOS also neglects to provide the ACPI/CPPC table, that Windows requires to enable HWP, and so Windows runs in legacy P-state mode, where this setting has no effect. Linux' intel_pstate driver does not require ACPI/CPPC to enable HWP, and so it runs in HWP mode, exposing this incorrect BIOS configuration. There are several ways to address this problem. First, Linux can also run in legacy P-state mode on this system. As intel_pstate is how Linux enables HWP, booting with "intel_pstate=disable" will run in acpi-cpufreq/ondemand legacy p-state mode. Or second, the "performance" governor can be used with intel_pstate, which will modify HWP.EPP to 0. Or third, starting in 4.10, the /sys/devices/system/cpu/cpufreq/policy*/energy_performance_preference attribute in can be updated from "balance_power" to "performance". Or fourth, apply this patch, which fixes the erroneous setting of MSR_IA32_POWER_CTL BIT_EE on this model, allowing the default configuration to function as designed. Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> Reviewed-by: Len Brown <len.brown@intel.com> Cc: 4.6+ <stable@vger.kernel.org> # 4.6+ Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'include/dt-bindings/pinctrl/am33xx.h')