diff options
author | jhb <jhb@FreeBSD.org> | 2001-12-11 23:33:44 +0000 |
---|---|---|
committer | jhb <jhb@FreeBSD.org> | 2001-12-11 23:33:44 +0000 |
commit | 21b6b26912b00bb37f9f16080ba7d49241814935 (patch) | |
tree | c785835e70070309148a72c55669ff0bf043a20a /sys/kern/subr_pcpu.c | |
parent | 279222ba62c185d7d7ec09017bb3e7760fd333f0 (diff) | |
download | FreeBSD-src-21b6b26912b00bb37f9f16080ba7d49241814935.zip FreeBSD-src-21b6b26912b00bb37f9f16080ba7d49241814935.tar.gz |
Overhaul the per-CPU support a bit:
- The MI portions of struct globaldata have been consolidated into a MI
struct pcpu. The MD per-CPU data are specified via a macro defined in
machine/pcpu.h. A macro was chosen over a struct mdpcpu so that the
interface would be cleaner (PCPU_GET(my_md_field) vs.
PCPU_GET(md.md_my_md_field)).
- All references to globaldata are changed to pcpu instead. In a UP kernel,
this data was stored as global variables which is where the original name
came from. In an SMP world this data is per-CPU and ideally private to each
CPU outside of the context of debuggers. This also included combining
machine/globaldata.h and machine/globals.h into machine/pcpu.h.
- The pointer to the thread using the FPU on i386 was renamed from
npxthread to fpcurthread to be identical with other architectures.
- Make the show pcpu ddb command MI with a MD callout to display MD
fields.
- The globaldata_register() function was renamed to pcpu_init() and now
init's MI fields of a struct pcpu in addition to registering it with
the internal array and list.
- A pcpu_destroy() function was added to remove a struct pcpu from the
internal array and list.
Tested on: alpha, i386
Reviewed by: peter, jake
Diffstat (limited to 'sys/kern/subr_pcpu.c')
-rw-r--r-- | sys/kern/subr_pcpu.c | 90 |
1 files changed, 79 insertions, 11 deletions
diff --git a/sys/kern/subr_pcpu.c b/sys/kern/subr_pcpu.c index 10a0d98..8db9e1f 100644 --- a/sys/kern/subr_pcpu.c +++ b/sys/kern/subr_pcpu.c @@ -44,32 +44,100 @@ * sole CPU as 0. */ +#include "opt_ddb.h" + #include <sys/param.h> #include <sys/systm.h> +#include <sys/linker_set.h> +#include <sys/lock.h> #include <sys/pcpu.h> +#include <sys/proc.h> +#include <ddb/ddb.h> -static struct globaldata *cpuid_to_globaldata[MAXCPU]; +static struct pcpu *cpuid_to_pcpu[MAXCPU]; struct cpuhead cpuhead = SLIST_HEAD_INITIALIZER(cpuhead); /* - * Register a struct globaldata. + * Initialize the MI portions of a struct pcpu. + */ +void +pcpu_init(struct pcpu *pcpu, int cpuid, size_t size) +{ + + bzero(pcpu, size); + KASSERT(cpuid >= 0 && cpuid < MAXCPU, + ("pcpu_init: invalid cpuid %d", cpuid)); + pcpu->pc_cpuid = cpuid; + cpuid_to_pcpu[cpuid] = pcpu; + SLIST_INSERT_HEAD(&cpuhead, pcpu, pc_allcpu); + cpu_pcpu_init(pcpu, cpuid, size); +} + +/* + * Destroy a struct pcpu. */ void -globaldata_register(struct globaldata *globaldata) +pcpu_destroy(struct pcpu *pcpu) { - KASSERT(globaldata->gd_cpuid >= 0 && globaldata->gd_cpuid < MAXCPU, - ("globaldata_register: invalid cpuid")); - cpuid_to_globaldata[globaldata->gd_cpuid] = globaldata; - SLIST_INSERT_HEAD(&cpuhead, globaldata, gd_allcpu); + SLIST_REMOVE(&cpuhead, pcpu, pcpu, pc_allcpu); + cpuid_to_pcpu[pcpu->pc_cpuid] = NULL; } /* - * Locate a struct globaldata by cpu id. + * Locate a struct pcpu by cpu id. */ -struct globaldata * -globaldata_find(u_int cpuid) +struct pcpu * +pcpu_find(u_int cpuid) +{ + + return (cpuid_to_pcpu[cpuid]); +} + +#ifdef DDB +DB_SHOW_COMMAND(pcpu, db_show_pcpu) { + struct pcpu *pc; + struct thread *td; + int id; - return (cpuid_to_globaldata[cpuid]); + if (have_addr) + id = ((addr >> 4) % 16) * 10 + (addr % 16); + else + id = PCPU_GET(cpuid); + pc = pcpu_find(id); + if (pc == NULL) { + db_printf("CPU %d not found\n", id); + return; + } + db_printf("cpuid = %d\n", pc->pc_cpuid); + db_printf("curthread = "); + td = pc->pc_curthread; + if (td != NULL) + db_printf("%p: pid %d \"%s\"\n", td, td->td_proc->p_pid, + td->td_proc->p_comm); + else + db_printf("none\n"); + db_printf("curpcb = %p\n", pc->pc_curpcb); + db_printf("fpcurthread = "); + td = pc->pc_fpcurthread; + if (td != NULL) + db_printf("%p: pid %d \"%s\"\n", td, td->td_proc->p_pid, + td->td_proc->p_comm); + else + db_printf("none\n"); + db_printf("idlethread = "); + td = pc->pc_idlethread; + if (td != NULL) + db_printf("%p: pid %d \"%s\"\n", td, td->td_proc->p_pid, + td->td_proc->p_comm); + else + db_printf("none\n"); + db_show_mdpcpu(pc); + +#ifdef WITNESS + db_printf("spin locks held:\n"); + witness_list_locks(&pc->pc_spinlocks); +#endif } +#endif |