diff --git a/Documentation/cpu-freq/governors.txt b/Documentation/cpu-freq/governors.txt index 933fae74c3379cba1fd7d066a2ab7f6daead76a3..f4b8dc4237e6a83b6f0cf44cfc3861f924baec10 100644 --- a/Documentation/cpu-freq/governors.txt +++ b/Documentation/cpu-freq/governors.txt @@ -27,6 +27,7 @@ Contents: 2.2 Powersave 2.3 Userspace 2.4 Ondemand +2.5 Conservative 3. The Governor Interface in the CPUfreq Core @@ -110,9 +111,64 @@ directory. The CPUfreq govenor "ondemand" sets the CPU depending on the current usage. To do this the CPU must have the capability to -switch the frequency very fast. - - +switch the frequency very quickly. There are a number of sysfs file +accessible parameters: + +sampling_rate: measured in uS (10^-6 seconds), this is how often you +want the kernel to look at the CPU usage and to make decisions on +what to do about the frequency. Typically this is set to values of +around '10000' or more. + +show_sampling_rate_(min|max): the minimum and maximum sampling rates +available that you may set 'sampling_rate' to. + +up_threshold: defines what the average CPU usaged between the samplings +of 'sampling_rate' needs to be for the kernel to make a decision on +whether it should increase the frequency. For example when it is set +to its default value of '80' it means that between the checking +intervals the CPU needs to be on average more than 80% in use to then +decide that the CPU frequency needs to be increased. + +sampling_down_factor: this parameter controls the rate that the CPU +makes a decision on when to decrease the frequency. When set to its +default value of '5' it means that at 1/5 the sampling_rate the kernel +makes a decision to lower the frequency. Five "lower rate" decisions +have to be made in a row before the CPU frequency is actually lower. +If set to '1' then the frequency decreases as quickly as it increases, +if set to '2' it decreases at half the rate of the increase. + +ignore_nice_load: this parameter takes a value of '0' or '1', when set +to '0' (its default) then all processes are counted towards towards the +'cpu utilisation' value. When set to '1' then processes that are +run with a 'nice' value will not count (and thus be ignored) in the +overal usage calculation. This is useful if you are running a CPU +intensive calculation on your laptop that you do not care how long it +takes to complete as you can 'nice' it and prevent it from taking part +in the deciding process of whether to increase your CPU frequency. + + +2.5 Conservative +---------------- + +The CPUfreq governor "conservative", much like the "ondemand" +governor, sets the CPU depending on the current usage. It differs in +behaviour in that it gracefully increases and decreases the CPU speed +rather than jumping to max speed the moment there is any load on the +CPU. This behaviour more suitable in a battery powered environment. +The governor is tweaked in the same manner as the "ondemand" governor +through sysfs with the addition of: + +freq_step: this describes what percentage steps the cpu freq should be +increased and decreased smoothly by. By default the cpu frequency will +increase in 5% chunks of your maximum cpu frequency. You can change this +value to anywhere between 0 and 100 where '0' will effectively lock your +CPU at a speed regardless of its load whilst '100' will, in theory, make +it behave identically to the "ondemand" governor. + +down_threshold: same as the 'up_threshold' found for the "ondemand" +governor but for the opposite direction. For example when set to its +default value of '20' it means that if the CPU usage needs to be below +20% between samples to have the frequency decreased. 3. The Governor Interface in the CPUfreq Core ============================================= diff --git a/arch/i386/kernel/cpu/cpufreq/cpufreq-nforce2.c b/arch/i386/kernel/cpu/cpufreq/cpufreq-nforce2.c index 04a405345203424388d15b050310642b723f00aa..2b62dee35c6c83299105b46ffc5e00b8969b3c5d 100644 --- a/arch/i386/kernel/cpu/cpufreq/cpufreq-nforce2.c +++ b/arch/i386/kernel/cpu/cpufreq/cpufreq-nforce2.c @@ -177,9 +177,10 @@ static unsigned int nforce2_fsb_read(int bootfsb) */ static int nforce2_set_fsb(unsigned int fsb) { - u32 pll, temp = 0; + u32 temp = 0; unsigned int tfsb; int diff; + int pll = 0; if ((fsb > max_fsb) || (fsb < NFORCE2_MIN_FSB)) { printk(KERN_ERR "cpufreq: FSB %d is out of range!\n", fsb); diff --git a/arch/i386/kernel/cpu/cpufreq/powernow-k8.c b/arch/i386/kernel/cpu/cpufreq/powernow-k8.c index 68a1fc87f4cabb6cb63b71a9c84bc0132494365a..0fbbd4c1072e6c19045d513af0acc9af9ad82a22 100644 --- a/arch/i386/kernel/cpu/cpufreq/powernow-k8.c +++ b/arch/i386/kernel/cpu/cpufreq/powernow-k8.c @@ -45,7 +45,7 @@ #define PFX "powernow-k8: " #define BFX PFX "BIOS error: " -#define VERSION "version 1.50.4" +#define VERSION "version 1.60.0" #include "powernow-k8.h" /* serialize freq changes */ @@ -216,10 +216,10 @@ static int write_new_vid(struct powernow_k8_data *data, u32 vid) do { wrmsr(MSR_FIDVID_CTL, lo, STOP_GRANT_5NS); - if (i++ > 100) { - printk(KERN_ERR PFX "internal error - pending bit very stuck - no further pstate changes possible\n"); - return 1; - } + if (i++ > 100) { + printk(KERN_ERR PFX "internal error - pending bit very stuck - no further pstate changes possible\n"); + return 1; + } } while (query_current_values_with_pending_wait(data)); if (savefid != data->currfid) { @@ -336,7 +336,7 @@ static int core_voltage_pre_transition(struct powernow_k8_data *data, u32 reqvid /* Phase 2 - core frequency transition */ static int core_frequency_transition(struct powernow_k8_data *data, u32 reqfid) { - u32 vcoreqfid, vcocurrfid, vcofiddiff, savevid = data->currvid; + u32 vcoreqfid, vcocurrfid, vcofiddiff, fid_interval, savevid = data->currvid; if ((reqfid < HI_FID_TABLE_BOTTOM) && (data->currfid < HI_FID_TABLE_BOTTOM)) { printk(KERN_ERR PFX "ph2: illegal lo-lo transition 0x%x 0x%x\n", @@ -359,9 +359,11 @@ static int core_frequency_transition(struct powernow_k8_data *data, u32 reqfid) : vcoreqfid - vcocurrfid; while (vcofiddiff > 2) { + (data->currfid & 1) ? (fid_interval = 1) : (fid_interval = 2); + if (reqfid > data->currfid) { if (data->currfid > LO_FID_TABLE_TOP) { - if (write_new_fid(data, data->currfid + 2)) { + if (write_new_fid(data, data->currfid + fid_interval)) { return 1; } } else { @@ -371,7 +373,7 @@ static int core_frequency_transition(struct powernow_k8_data *data, u32 reqfid) } } } else { - if (write_new_fid(data, data->currfid - 2)) + if (write_new_fid(data, data->currfid - fid_interval)) return 1; } @@ -464,7 +466,7 @@ static int check_supported_cpu(unsigned int cpu) set_cpus_allowed(current, cpumask_of_cpu(cpu)); if (smp_processor_id() != cpu) { - printk(KERN_ERR "limiting to cpu %u failed\n", cpu); + printk(KERN_ERR PFX "limiting to cpu %u failed\n", cpu); goto out; } @@ -474,7 +476,7 @@ static int check_supported_cpu(unsigned int cpu) eax = cpuid_eax(CPUID_PROCESSOR_SIGNATURE); if (((eax & CPUID_USE_XFAM_XMOD) != CPUID_USE_XFAM_XMOD) || ((eax & CPUID_XFAM) != CPUID_XFAM_K8) || - ((eax & CPUID_XMOD) > CPUID_XMOD_REV_F)) { + ((eax & CPUID_XMOD) > CPUID_XMOD_REV_G)) { printk(KERN_INFO PFX "Processor cpuid %x not supported\n", eax); goto out; } @@ -517,22 +519,24 @@ static int check_pst_table(struct powernow_k8_data *data, struct pst_s *pst, u8 printk(KERN_ERR BFX "maxvid exceeded with pstate %d\n", j); return -ENODEV; } - if ((pst[j].fid > MAX_FID) - || (pst[j].fid & 1) - || (j && (pst[j].fid < HI_FID_TABLE_BOTTOM))) { + if (pst[j].fid > MAX_FID) { + printk(KERN_ERR BFX "maxfid exceeded with pstate %d\n", j); + return -ENODEV; + } + if (j && (pst[j].fid < HI_FID_TABLE_BOTTOM)) { /* Only first fid is allowed to be in "low" range */ - printk(KERN_ERR PFX "two low fids - %d : 0x%x\n", j, pst[j].fid); + printk(KERN_ERR BFX "two low fids - %d : 0x%x\n", j, pst[j].fid); return -EINVAL; } if (pst[j].fid < lastfid) lastfid = pst[j].fid; } if (lastfid & 1) { - printk(KERN_ERR PFX "lastfid invalid\n"); + printk(KERN_ERR BFX "lastfid invalid\n"); return -EINVAL; } if (lastfid > LO_FID_TABLE_TOP) - printk(KERN_INFO PFX "first fid not from lo freq table\n"); + printk(KERN_INFO BFX "first fid not from lo freq table\n"); return 0; } @@ -631,7 +635,7 @@ static int find_psb_table(struct powernow_k8_data *data) dprintk("table vers: 0x%x\n", psb->tableversion); if (psb->tableversion != PSB_VERSION_1_4) { - printk(KERN_INFO BFX "PSB table is not v1.4\n"); + printk(KERN_ERR BFX "PSB table is not v1.4\n"); return -ENODEV; } @@ -689,7 +693,7 @@ static int find_psb_table(struct powernow_k8_data *data) * BIOS and Kernel Developer's Guide, which is available on * www.amd.com */ - printk(KERN_INFO PFX "BIOS error - no PSB or ACPI _PSS objects\n"); + printk(KERN_ERR PFX "BIOS error - no PSB or ACPI _PSS objects\n"); return -ENODEV; } @@ -912,7 +916,7 @@ static int powernowk8_target(struct cpufreq_policy *pol, unsigned targfreq, unsi set_cpus_allowed(current, cpumask_of_cpu(pol->cpu)); if (smp_processor_id() != pol->cpu) { - printk(KERN_ERR "limiting to cpu %u failed\n", pol->cpu); + printk(KERN_ERR PFX "limiting to cpu %u failed\n", pol->cpu); goto err_out; } @@ -982,6 +986,9 @@ static int __init powernowk8_cpu_init(struct cpufreq_policy *pol) cpumask_t oldmask = CPU_MASK_ALL; int rc, i; + if (!cpu_online(pol->cpu)) + return -ENODEV; + if (!check_supported_cpu(pol->cpu)) return -ENODEV; @@ -1021,7 +1028,7 @@ static int __init powernowk8_cpu_init(struct cpufreq_policy *pol) set_cpus_allowed(current, cpumask_of_cpu(pol->cpu)); if (smp_processor_id() != pol->cpu) { - printk(KERN_ERR "limiting to cpu %u failed\n", pol->cpu); + printk(KERN_ERR PFX "limiting to cpu %u failed\n", pol->cpu); goto err_out; } @@ -1162,10 +1169,9 @@ static void __exit powernowk8_exit(void) cpufreq_unregister_driver(&cpufreq_amd64_driver); } -MODULE_AUTHOR("Paul Devriendt and Mark Langsdorf and Mark Langsdorf "); MODULE_DESCRIPTION("AMD Athlon 64 and Opteron processor frequency driver."); MODULE_LICENSE("GPL"); late_initcall(powernowk8_init); module_exit(powernowk8_exit); - diff --git a/arch/i386/kernel/cpu/cpufreq/powernow-k8.h b/arch/i386/kernel/cpu/cpufreq/powernow-k8.h index b1e85bb36396578fe8402dd2365277b32fb6e7e0..d0de37d58e9a2abe2839dd57206e5598745c54e0 100644 --- a/arch/i386/kernel/cpu/cpufreq/powernow-k8.h +++ b/arch/i386/kernel/cpu/cpufreq/powernow-k8.h @@ -42,7 +42,7 @@ struct powernow_k8_data { #define CPUID_XFAM 0x0ff00000 /* extended family */ #define CPUID_XFAM_K8 0 #define CPUID_XMOD 0x000f0000 /* extended model */ -#define CPUID_XMOD_REV_F 0x00040000 +#define CPUID_XMOD_REV_G 0x00060000 #define CPUID_USE_XFAM_XMOD 0x00000f00 #define CPUID_GET_MAX_CAPABILITIES 0x80000000 #define CPUID_FREQ_VOLT_CAPABILITIES 0x80000007 @@ -86,13 +86,14 @@ struct powernow_k8_data { * low fid table * - lowest entry in the high fid table must be a <= 200MHz + 2 * the entry * in the low fid table - * - the parts can only step at 200 MHz intervals, so 1.9 GHz is never valid + * - the parts can only step at <= 200 MHz intervals, odd fid values are + * supported in revision G and later revisions. * - lowest frequency must be >= interprocessor hypertransport link speed * (only applies to MP systems obviously) */ /* fids (frequency identifiers) are arranged in 2 tables - lo and hi */ -#define LO_FID_TABLE_TOP 6 /* fid values marking the boundary */ +#define LO_FID_TABLE_TOP 7 /* fid values marking the boundary */ #define HI_FID_TABLE_BOTTOM 8 /* between the low and high tables */ #define LO_VCOFREQ_TABLE_TOP 1400 /* corresponding vco frequency values */ @@ -106,7 +107,7 @@ struct powernow_k8_data { #define MIN_FREQ 800 /* Min and max freqs, per spec */ #define MAX_FREQ 5000 -#define INVALID_FID_MASK 0xffffffc1 /* not a valid fid if these bits are set */ +#define INVALID_FID_MASK 0xffffffc0 /* not a valid fid if these bits are set */ #define INVALID_VID_MASK 0xffffffc0 /* not a valid vid if these bits are set */ #define VID_OFF 0x3f diff --git a/arch/i386/kernel/cpu/cpufreq/speedstep-ich.c b/arch/i386/kernel/cpu/cpufreq/speedstep-ich.c index 5b7d18a06afaeee09b090c20d3bb6b7c7016f0f4..b425cd3d1838377aee89ad50411b2f51b6d40306 100644 --- a/arch/i386/kernel/cpu/cpufreq/speedstep-ich.c +++ b/arch/i386/kernel/cpu/cpufreq/speedstep-ich.c @@ -40,6 +40,7 @@ static struct pci_dev *speedstep_chipset_dev; */ static unsigned int speedstep_processor = 0; +static u32 pmbase; /* * There are only two frequency states for each processor. Values @@ -56,34 +57,47 @@ static struct cpufreq_frequency_table speedstep_freqs[] = { /** - * speedstep_set_state - set the SpeedStep state - * @state: new processor frequency state (SPEEDSTEP_LOW or SPEEDSTEP_HIGH) + * speedstep_find_register - read the PMBASE address * - * Tries to change the SpeedStep state. + * Returns: -ENODEV if no register could be found */ -static void speedstep_set_state (unsigned int state) +static int speedstep_find_register (void) { - u32 pmbase; - u8 pm2_blk; - u8 value; - unsigned long flags; - - if (!speedstep_chipset_dev || (state > 0x1)) - return; + if (!speedstep_chipset_dev) + return -ENODEV; /* get PMBASE */ pci_read_config_dword(speedstep_chipset_dev, 0x40, &pmbase); if (!(pmbase & 0x01)) { printk(KERN_ERR "speedstep-ich: could not find speedstep register\n"); - return; + return -ENODEV; } pmbase &= 0xFFFFFFFE; if (!pmbase) { printk(KERN_ERR "speedstep-ich: could not find speedstep register\n"); - return; + return -ENODEV; } + dprintk("pmbase is 0x%x\n", pmbase); + return 0; +} + +/** + * speedstep_set_state - set the SpeedStep state + * @state: new processor frequency state (SPEEDSTEP_LOW or SPEEDSTEP_HIGH) + * + * Tries to change the SpeedStep state. + */ +static void speedstep_set_state (unsigned int state) +{ + u8 pm2_blk; + u8 value; + unsigned long flags; + + if (state > 0x1) + return; + /* Disable IRQs */ local_irq_save(flags); @@ -315,10 +329,11 @@ static int speedstep_cpu_init(struct cpufreq_policy *policy) cpus_allowed = current->cpus_allowed; set_cpus_allowed(current, policy->cpus); - /* detect low and high frequency */ + /* detect low and high frequency and transition latency */ result = speedstep_get_freqs(speedstep_processor, &speedstep_freqs[SPEEDSTEP_LOW].frequency, &speedstep_freqs[SPEEDSTEP_HIGH].frequency, + &policy->cpuinfo.transition_latency, &speedstep_set_state); set_cpus_allowed(current, cpus_allowed); if (result) @@ -335,7 +350,6 @@ static int speedstep_cpu_init(struct cpufreq_policy *policy) /* cpuinfo and default policy values */ policy->governor = CPUFREQ_DEFAULT_GOVERNOR; - policy->cpuinfo.transition_latency = CPUFREQ_ETERNAL; policy->cur = speed; result = cpufreq_frequency_table_cpuinfo(policy, speedstep_freqs); @@ -400,6 +414,9 @@ static int __init speedstep_init(void) return -EINVAL; } + if (speedstep_find_register()) + return -ENODEV; + return cpufreq_register_driver(&speedstep_driver); } diff --git a/arch/i386/kernel/cpu/cpufreq/speedstep-lib.c b/arch/i386/kernel/cpu/cpufreq/speedstep-lib.c index d368b3f5fce85397e9e139eb4f5b0314ac15c178..7c47005a1805c41dec67157c18c103dd6720f3c3 100644 --- a/arch/i386/kernel/cpu/cpufreq/speedstep-lib.c +++ b/arch/i386/kernel/cpu/cpufreq/speedstep-lib.c @@ -320,11 +320,13 @@ EXPORT_SYMBOL_GPL(speedstep_detect_processor); unsigned int speedstep_get_freqs(unsigned int processor, unsigned int *low_speed, unsigned int *high_speed, + unsigned int *transition_latency, void (*set_state) (unsigned int state)) { unsigned int prev_speed; unsigned int ret = 0; unsigned long flags; + struct timeval tv1, tv2; if ((!processor) || (!low_speed) || (!high_speed) || (!set_state)) return -EINVAL; @@ -337,7 +339,7 @@ unsigned int speedstep_get_freqs(unsigned int processor, return -EIO; dprintk("previous speed is %u\n", prev_speed); - + local_irq_save(flags); /* switch to low state */ @@ -350,8 +352,17 @@ unsigned int speedstep_get_freqs(unsigned int processor, dprintk("low speed is %u\n", *low_speed); + /* start latency measurement */ + if (transition_latency) + do_gettimeofday(&tv1); + /* switch to high state */ set_state(SPEEDSTEP_HIGH); + + /* end latency measurement */ + if (transition_latency) + do_gettimeofday(&tv2); + *high_speed = speedstep_get_processor_frequency(processor); if (!*high_speed) { ret = -EIO; @@ -369,6 +380,25 @@ unsigned int speedstep_get_freqs(unsigned int processor, if (*high_speed != prev_speed) set_state(SPEEDSTEP_LOW); + if (transition_latency) { + *transition_latency = (tv2.tv_sec - tv1.tv_sec) * USEC_PER_SEC + + tv2.tv_usec - tv1.tv_usec; + dprintk("transition latency is %u uSec\n", *transition_latency); + + /* convert uSec to nSec and add 20% for safety reasons */ + *transition_latency *= 1200; + + /* check if the latency measurement is too high or too low + * and set it to a safe value (500uSec) in that case + */ + if (*transition_latency > 10000000 || *transition_latency < 50000) { + printk (KERN_WARNING "speedstep: frequency transition measured seems out of " + "range (%u nSec), falling back to a safe one of %u nSec.\n", + *transition_latency, 500000); + *transition_latency = 500000; + } + } + out: local_irq_restore(flags); return (ret); diff --git a/arch/i386/kernel/cpu/cpufreq/speedstep-lib.h b/arch/i386/kernel/cpu/cpufreq/speedstep-lib.h index 261a2c9b7f6b875bbded0143ba87011660a4c0c1..6a727fd3a77e099e863bc982309cd1028fd2e55e 100644 --- a/arch/i386/kernel/cpu/cpufreq/speedstep-lib.h +++ b/arch/i386/kernel/cpu/cpufreq/speedstep-lib.h @@ -44,4 +44,5 @@ extern unsigned int speedstep_get_processor_frequency(unsigned int processor); extern unsigned int speedstep_get_freqs(unsigned int processor, unsigned int *low_speed, unsigned int *high_speed, + unsigned int *transition_latency, void (*set_state) (unsigned int state)); diff --git a/arch/i386/kernel/cpu/cpufreq/speedstep-smi.c b/arch/i386/kernel/cpu/cpufreq/speedstep-smi.c index 2718fb6f6aba89467467e48f1dd24fba465fae08..28cc5d524afcd18a2dce1ee4f5ccb3d2c737faf1 100644 --- a/arch/i386/kernel/cpu/cpufreq/speedstep-smi.c +++ b/arch/i386/kernel/cpu/cpufreq/speedstep-smi.c @@ -269,6 +269,7 @@ static int speedstep_cpu_init(struct cpufreq_policy *policy) result = speedstep_get_freqs(speedstep_processor, &speedstep_freqs[SPEEDSTEP_LOW].frequency, &speedstep_freqs[SPEEDSTEP_HIGH].frequency, + NULL, &speedstep_set_state); if (result) { diff --git a/arch/i386/kernel/cpu/proc.c b/arch/i386/kernel/cpu/proc.c index e7921315ae9d8fe5df562cc745f908b6081ed1ab..6d91b274589c7fff2bef8e0d35aaa90c41de71a6 100644 --- a/arch/i386/kernel/cpu/proc.c +++ b/arch/i386/kernel/cpu/proc.c @@ -3,6 +3,7 @@ #include #include #include +#include /* * Get CPU information for use by the procfs. @@ -86,8 +87,11 @@ static int show_cpuinfo(struct seq_file *m, void *v) seq_printf(m, "stepping\t: unknown\n"); if ( cpu_has(c, X86_FEATURE_TSC) ) { + unsigned int freq = cpufreq_quick_get(n); + if (!freq) + freq = cpu_khz; seq_printf(m, "cpu MHz\t\t: %u.%03u\n", - cpu_khz / 1000, (cpu_khz % 1000)); + freq / 1000, (freq % 1000)); } /* Cache size */ diff --git a/arch/ia64/kernel/setup.c b/arch/ia64/kernel/setup.c index 5add0bcf87a7a338974d39fbff41fe68ce3d6956..088e5dded8dc1c2be9706ffd5819499b433f8513 100644 --- a/arch/ia64/kernel/setup.c +++ b/arch/ia64/kernel/setup.c @@ -43,6 +43,7 @@ #include #include #include +#include #include #include @@ -517,6 +518,7 @@ show_cpuinfo (struct seq_file *m, void *v) char family[32], features[128], *cp, sep; struct cpuinfo_ia64 *c = v; unsigned long mask; + unsigned int proc_freq; int i; mask = c->features; @@ -549,6 +551,10 @@ show_cpuinfo (struct seq_file *m, void *v) sprintf(cp, " 0x%lx", mask); } + proc_freq = cpufreq_quick_get(cpunum); + if (!proc_freq) + proc_freq = c->proc_freq / 1000; + seq_printf(m, "processor : %d\n" "vendor : %s\n" @@ -565,7 +571,7 @@ show_cpuinfo (struct seq_file *m, void *v) "BogoMIPS : %lu.%02lu\n", cpunum, c->vendor, family, c->model, c->revision, c->archrev, features, c->ppn, c->number, - c->proc_freq / 1000000, c->proc_freq % 1000000, + proc_freq / 1000, proc_freq % 1000, c->itc_freq / 1000000, c->itc_freq % 1000000, lpj*HZ/500000, (lpj*HZ/5000) % 100); #ifdef CONFIG_SMP diff --git a/arch/x86_64/kernel/setup.c b/arch/x86_64/kernel/setup.c index 750e01dcbdf49f364940c87f5ab6b4bc158d460a..64c4534b930c74bc118cf1530a812401456f3d4e 100644 --- a/arch/x86_64/kernel/setup.c +++ b/arch/x86_64/kernel/setup.c @@ -42,6 +42,7 @@ #include #include #include +#include #include #include @@ -1256,8 +1257,11 @@ static int show_cpuinfo(struct seq_file *m, void *v) seq_printf(m, "stepping\t: unknown\n"); if (cpu_has(c,X86_FEATURE_TSC)) { + unsigned int freq = cpufreq_quick_get((unsigned)(c-cpu_data)); + if (!freq) + freq = cpu_khz; seq_printf(m, "cpu MHz\t\t: %u.%03u\n", - cpu_khz / 1000, (cpu_khz % 1000)); + freq / 1000, (freq % 1000)); } /* Cache size */ diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c index 815902c2c856bd08df4da65daaf996f78f07e419..a9163d02983af68f069887a520330e84470cc58b 100644 --- a/drivers/cpufreq/cpufreq.c +++ b/drivers/cpufreq/cpufreq.c @@ -822,6 +822,30 @@ static void cpufreq_out_of_sync(unsigned int cpu, unsigned int old_freq, unsigne } +/** + * cpufreq_quick_get - get the CPU frequency (in kHz) frpm policy->cur + * @cpu: CPU number + * + * This is the last known freq, without actually getting it from the driver. + * Return value will be same as what is shown in scaling_cur_freq in sysfs. + */ +unsigned int cpufreq_quick_get(unsigned int cpu) +{ + struct cpufreq_policy *policy = cpufreq_cpu_get(cpu); + unsigned int ret = 0; + + if (policy) { + down(&policy->lock); + ret = policy->cur; + up(&policy->lock); + cpufreq_cpu_put(policy); + } + + return (ret); +} +EXPORT_SYMBOL(cpufreq_quick_get); + + /** * cpufreq_get - get the current CPU frequency (in kHz) * @cpu: CPU number diff --git a/drivers/cpufreq/cpufreq_conservative.c b/drivers/cpufreq/cpufreq_conservative.c index 2ed5c4363b536220843d942af2e84276b9a1dbd0..39543a2bed0f43c232e724ce809f1c89d438f6e1 100644 --- a/drivers/cpufreq/cpufreq_conservative.c +++ b/drivers/cpufreq/cpufreq_conservative.c @@ -93,7 +93,7 @@ static inline unsigned int get_cpu_idle_time(unsigned int cpu) { return kstat_cpu(cpu).cpustat.idle + kstat_cpu(cpu).cpustat.iowait + - ( !dbs_tuners_ins.ignore_nice ? + ( dbs_tuners_ins.ignore_nice ? kstat_cpu(cpu).cpustat.nice : 0); } @@ -127,7 +127,7 @@ show_one(sampling_rate, sampling_rate); show_one(sampling_down_factor, sampling_down_factor); show_one(up_threshold, up_threshold); show_one(down_threshold, down_threshold); -show_one(ignore_nice, ignore_nice); +show_one(ignore_nice_load, ignore_nice); show_one(freq_step, freq_step); static ssize_t store_sampling_down_factor(struct cpufreq_policy *unused, @@ -207,7 +207,7 @@ static ssize_t store_down_threshold(struct cpufreq_policy *unused, return count; } -static ssize_t store_ignore_nice(struct cpufreq_policy *policy, +static ssize_t store_ignore_nice_load(struct cpufreq_policy *policy, const char *buf, size_t count) { unsigned int input; @@ -272,7 +272,7 @@ define_one_rw(sampling_rate); define_one_rw(sampling_down_factor); define_one_rw(up_threshold); define_one_rw(down_threshold); -define_one_rw(ignore_nice); +define_one_rw(ignore_nice_load); define_one_rw(freq_step); static struct attribute * dbs_attributes[] = { @@ -282,7 +282,7 @@ static struct attribute * dbs_attributes[] = { &sampling_down_factor.attr, &up_threshold.attr, &down_threshold.attr, - &ignore_nice.attr, + &ignore_nice_load.attr, &freq_step.attr, NULL }; diff --git a/drivers/cpufreq/cpufreq_ondemand.c b/drivers/cpufreq/cpufreq_ondemand.c index 17741111246b9f21362710cdc1099c31cb69512d..e69fd8dd1f1cb7bf6042a878b2545a714c7df133 100644 --- a/drivers/cpufreq/cpufreq_ondemand.c +++ b/drivers/cpufreq/cpufreq_ondemand.c @@ -89,7 +89,7 @@ static inline unsigned int get_cpu_idle_time(unsigned int cpu) { return kstat_cpu(cpu).cpustat.idle + kstat_cpu(cpu).cpustat.iowait + - ( !dbs_tuners_ins.ignore_nice ? + ( dbs_tuners_ins.ignore_nice ? kstat_cpu(cpu).cpustat.nice : 0); } @@ -122,7 +122,7 @@ static ssize_t show_##file_name \ show_one(sampling_rate, sampling_rate); show_one(sampling_down_factor, sampling_down_factor); show_one(up_threshold, up_threshold); -show_one(ignore_nice, ignore_nice); +show_one(ignore_nice_load, ignore_nice); static ssize_t store_sampling_down_factor(struct cpufreq_policy *unused, const char *buf, size_t count) @@ -182,7 +182,7 @@ static ssize_t store_up_threshold(struct cpufreq_policy *unused, return count; } -static ssize_t store_ignore_nice(struct cpufreq_policy *policy, +static ssize_t store_ignore_nice_load(struct cpufreq_policy *policy, const char *buf, size_t count) { unsigned int input; @@ -223,7 +223,7 @@ __ATTR(_name, 0644, show_##_name, store_##_name) define_one_rw(sampling_rate); define_one_rw(sampling_down_factor); define_one_rw(up_threshold); -define_one_rw(ignore_nice); +define_one_rw(ignore_nice_load); static struct attribute * dbs_attributes[] = { &sampling_rate_max.attr, @@ -231,7 +231,7 @@ static struct attribute * dbs_attributes[] = { &sampling_rate.attr, &sampling_down_factor.attr, &up_threshold.attr, - &ignore_nice.attr, + &ignore_nice_load.attr, NULL }; diff --git a/include/linux/cpufreq.h b/include/linux/cpufreq.h index d068176b7ad7f4d7242e2417f87e3f67043b1d23..c31650df92412de9c6514e81bc5955e8f8a02dcb 100644 --- a/include/linux/cpufreq.h +++ b/include/linux/cpufreq.h @@ -256,6 +256,16 @@ int cpufreq_update_policy(unsigned int cpu); /* query the current CPU frequency (in kHz). If zero, cpufreq couldn't detect it */ unsigned int cpufreq_get(unsigned int cpu); +/* query the last known CPU freq (in kHz). If zero, cpufreq couldn't detect it */ +#ifdef CONFIG_CPU_FREQ +unsigned int cpufreq_quick_get(unsigned int cpu); +#else +static inline unsigned int cpufreq_quick_get(unsigned int cpu) +{ + return 0; +} +#endif + /********************************************************************* * CPUFREQ DEFAULT GOVERNOR *