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for each samples, record and report cpuid and lwpid.

This commit is contained in:
yamt 2011-04-14 16:23:59 +00:00
parent 6809106b9e
commit 83fb606c68
3 changed files with 24 additions and 8 deletions
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22
sys/dev/tprof/tprof.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: tprof.c,v 1.9 2011/02/25 22:35:38 yamt Exp $ */
/* $NetBSD: tprof.c,v 1.10 2011/04/14 16:23:59 yamt Exp $ */
/*-
* Copyright (c)2008,2009,2010 YAMAMOTO Takashi,
@ -27,7 +27,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: tprof.c,v 1.9 2011/02/25 22:35:38 yamt Exp $");
__KERNEL_RCSID(0, "$NetBSD: tprof.c,v 1.10 2011/04/14 16:23:59 yamt Exp $");
#include <sys/param.h>
#include <sys/systm.h>
@ -76,6 +76,7 @@ typedef struct tprof_buf {
typedef struct {
tprof_buf_t *c_buf;
uint32_t c_cpuid;
struct work c_work;
callout_t c_callout;
} __aligned(CACHE_LINE_SIZE) tprof_cpu_t;
@ -394,7 +395,10 @@ tprof_backend_lookup(const char *name)
* tprof_sample: record a sample on the per-cpu buffer.
*
* be careful; can be called in NMI context.
* we are bluntly assuming that curcpu() and curlwp->l_proc->p_pid are safe.
* we are bluntly assuming the followings are safe.
* curcpu()
* curlwp->l_lid
* curlwp->l_proc->p_pid
*/
void
@ -404,6 +408,7 @@ tprof_sample(tprof_backend_cookie_t *cookie, const tprof_frame_info_t *tfi)
tprof_buf_t * const buf = c->c_buf;
tprof_sample_t *sp;
const uintptr_t pc = tfi->tfi_pc;
const lwp_t * const l = curlwp;
u_int idx;
idx = buf->b_used;
@ -412,7 +417,9 @@ tprof_sample(tprof_backend_cookie_t *cookie, const tprof_frame_info_t *tfi)
return;
}
sp = &buf->b_data[idx];
sp->s_pid = curlwp->l_proc->p_pid;
sp->s_pid = l->l_proc->p_pid;
sp->s_lwpid = l->l_lid;
sp->s_cpuid = c->c_cpuid;
sp->s_flags = (tfi->tfi_inkernel) ? TPROF_SAMPLE_INKERNEL : 0;
sp->s_pc = pc;
buf->b_used = idx + 1;
@ -660,6 +667,7 @@ MODULE(MODULE_CLASS_DRIVER, tprof, NULL);
static void
tprof_driver_init(void)
{
unsigned int i;
mutex_init(&tprof_lock, MUTEX_DEFAULT, IPL_NONE);
mutex_init(&tprof_reader_lock, MUTEX_DEFAULT, IPL_NONE);
@ -667,6 +675,12 @@ tprof_driver_init(void)
cv_init(&tprof_cv, "tprof");
cv_init(&tprof_reader_cv, "tprof_rd");
STAILQ_INIT(&tprof_list);
for (i = 0; i < __arraycount(tprof_cpus); i++) {
tprof_cpu_t * const c = &tprof_cpus[i];
c->c_buf = NULL;
c->c_cpuid = i;
}
}
static void

4
sys/dev/tprof/tprof_ioctl.h
View File

@ -1,4 +1,4 @@
/* $NetBSD: tprof_ioctl.h,v 1.2 2011/02/05 14:04:40 yamt Exp $ */
/* $NetBSD: tprof_ioctl.h,v 1.3 2011/04/14 16:23:59 yamt Exp $ */
/*-
* Copyright (c)2008,2010 YAMAMOTO Takashi,
@ -37,7 +37,7 @@
#include <dev/tprof/tprof_types.h>
#define TPROF_VERSION 2
#define TPROF_VERSION 3 /* kernel-userland ABI version */
#define TPROF_IOC_GETVERSION _IOR('T', 1, int)

6
sys/dev/tprof/tprof_types.h
View File

@ -1,7 +1,7 @@
/* $NetBSD: tprof_types.h,v 1.1 2011/02/05 14:04:40 yamt Exp $ */
/* $NetBSD: tprof_types.h,v 1.2 2011/04/14 16:23:59 yamt Exp $ */
/*-
* Copyright (c)2010 YAMAMOTO Takashi,
* Copyright (c)2010,2011 YAMAMOTO Takashi,
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
@ -41,6 +41,8 @@
typedef struct {
uint32_t s_pid; /* process id */
uint32_t s_lwpid; /* lwp id */
uint32_t s_cpuid; /* cpu id */
uint32_t s_flags; /* flags */
uintptr_t s_pc; /* program counter */
} tprof_sample_t;