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author | Ralf Baechle <ralf@linux-mips.org> | 2006-04-05 08:45:45 (GMT) |
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committer | Ralf Baechle <ralf@linux-mips.org> | 2006-04-19 02:14:28 (GMT) |
commit | 41c594ab65fc89573af296d192aa5235d09717ab (patch) | |
tree | 562462512a320f386bdf49eabfbb26bb3ee761fa /arch/mips/kernel/smtc-proc.c | |
parent | 2600990e640e3bef29ed89d565864cf16ee83833 (diff) | |
download | linux-41c594ab65fc89573af296d192aa5235d09717ab.tar.xz |
[MIPS] MT: Improved multithreading support.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/kernel/smtc-proc.c')
-rw-r--r-- | arch/mips/kernel/smtc-proc.c | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/arch/mips/kernel/smtc-proc.c b/arch/mips/kernel/smtc-proc.c new file mode 100644 index 0000000..6f37099 --- /dev/null +++ b/arch/mips/kernel/smtc-proc.c @@ -0,0 +1,93 @@ +/* + * /proc hooks for SMTC kernel + * Copyright (C) 2005 Mips Technologies, Inc + */ + +#include <linux/kernel.h> +#include <linux/sched.h> +#include <linux/cpumask.h> +#include <linux/interrupt.h> + +#include <asm/cpu.h> +#include <asm/processor.h> +#include <asm/atomic.h> +#include <asm/system.h> +#include <asm/hardirq.h> +#include <asm/mmu_context.h> +#include <asm/smp.h> +#include <asm/mipsregs.h> +#include <asm/cacheflush.h> +#include <linux/proc_fs.h> + +#include <asm/smtc_proc.h> + +/* + * /proc diagnostic and statistics hooks + */ + +/* + * Statistics gathered + */ +unsigned long selfipis[NR_CPUS]; + +struct smtc_cpu_proc smtc_cpu_stats[NR_CPUS]; + +static struct proc_dir_entry *smtc_stats; + +atomic_t smtc_fpu_recoveries; + +static int proc_read_smtc(char *page, char **start, off_t off, + int count, int *eof, void *data) +{ + int totalen = 0; + int len; + int i; + extern unsigned long ebase; + + len = sprintf(page, "SMTC Status Word: 0x%08x\n", smtc_status); + totalen += len; + page += len; + len = sprintf(page, "Config7: 0x%08x\n", read_c0_config7()); + totalen += len; + page += len; + len = sprintf(page, "EBASE: 0x%08lx\n", ebase); + totalen += len; + page += len; + len = sprintf(page, "Counter Interrupts taken per CPU (TC)\n"); + totalen += len; + page += len; + for (i=0; i < NR_CPUS; i++) { + len = sprintf(page, "%d: %ld\n", i, smtc_cpu_stats[i].timerints); + totalen += len; + page += len; + } + len = sprintf(page, "Self-IPIs by CPU:\n"); + totalen += len; + page += len; + for(i = 0; i < NR_CPUS; i++) { + len = sprintf(page, "%d: %ld\n", i, smtc_cpu_stats[i].selfipis); + totalen += len; + page += len; + } + len = sprintf(page, "%d Recoveries of \"stolen\" FPU\n", + atomic_read(&smtc_fpu_recoveries)); + totalen += len; + page += len; + + return totalen; +} + +void init_smtc_stats(void) +{ + int i; + + for (i=0; i<NR_CPUS; i++) { + smtc_cpu_stats[i].timerints = 0; + smtc_cpu_stats[i].selfipis = 0; + } + + atomic_set(&smtc_fpu_recoveries, 0); + + smtc_stats = create_proc_read_entry("smtc", 0444, NULL, + proc_read_smtc, NULL); +} |