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Rework getrusage(2) infrastructure 

- the userland call is now made to PM only, and PM relays the call to
  other servers as appropriate; this is an ABI change that will
  ultimately allow us to add proper support for wait3() and the like;
  for the moment there is backward compatibility;
- the getrusage-specific kernel subcall has been removed, as it
  provided only redundant functionality, and did not provide the means
  to be extended correctly in the future - namely, allowing the kernel
  to return different values depending on whether resource usage of
  the caller (self) or its children was requested;
- VM is now told whether resource usage of the caller (self) or its
  children is requested, and it refrains from filling in wrong values
  for information it does not have;
- VM now uses the correct unit for the ru_maxrss values;
- VFS is cut out of the loop entirely, since it does not provide any
  values at the moment; a comment explains how it should be readded.

Change-Id: I27b0f488437dec3d8e784721c67b03f2f853120f
This commit is contained in:
David van Moolenbroek 2015-09-27 17:32:10 +00:00
parent 0f8e20a12c
commit bc2d75fa05
19 changed files with 128 additions and 168 deletions
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1
etc/system.conf
View File

@ -61,6 +61,7 @@ service pm
EXEC_NEWMEM # 03
WILLEXIT # 05
NOTIFY_SIG # 39
GETRUSAGE # 47
;
io NONE; # No I/O range allowed
irq NONE; # No IRQ allowed

1
minix/commands/service/parse.c
View File

@ -754,6 +754,7 @@ struct
{ "CLEARCACHE", VM_CLEARCACHE },
{ "VFS_MMAP", VM_VFS_MMAP },
{ "VFS_REPLY", VM_VFS_REPLY },
{ "GETRUSAGE", VM_GETRUSAGE },
{ "RS_PREPARE", VM_RS_PREPARE },
{ NULL, 0 },
};

2
minix/include/minix/callnr.h
View File

@ -111,7 +111,7 @@
#define VFS_GETVFSSTAT (VFS_BASE + 39)
#define VFS_STATVFS1 (VFS_BASE + 40)
#define VFS_FSTATVFS1 (VFS_BASE + 41)
#define VFS_GETRUSAGE (VFS_BASE + 42)
#define VFS_GETRUSAGE (VFS_BASE + 42) /* obsolete */
#define VFS_SVRCTL (VFS_BASE + 43)
#define VFS_GCOV_FLUSH (VFS_BASE + 44)
#define VFS_MAPDRIVER (VFS_BASE + 45)

3
minix/include/minix/com.h
View File

@ -332,7 +332,6 @@
# define GET_IDLETSC 21 /* get cumulative idle time stamp counter */
# define GET_CPUINFO 23 /* get information about cpus */
# define GET_REGS 24 /* get general process registers */
# define GET_RUSAGE 25 /* get resource usage */
/* Subfunctions for SYS_PRIVCTL */
#define SYS_PRIV_ALLOW 1 /* Allow process to run */
@ -765,7 +764,7 @@
/* Basic vm calls allowed to every process. */
#define VM_BASIC_CALLS \
VM_BRK, VM_MMAP, VM_MUNMAP, VM_MAP_PHYS, VM_UNMAP_PHYS, VM_INFO, \
VM_GETRUSAGE
VM_GETRUSAGE /* VM_GETRUSAGE is to be removed from this list ASAP */
/*===========================================================================*
* Messages for IPC server *

26
minix/include/minix/ipc.h
View File

@ -774,13 +774,6 @@ typedef struct {
} mess_lc_vfs_readwrite;
_ASSERT_MSG_SIZE(mess_lc_vfs_readwrite);
typedef struct {
vir_bytes addr;
uint8_t padding[52];
} mess_lc_vfs_rusage;
_ASSERT_MSG_SIZE(mess_lc_vfs_rusage);
typedef struct {
uint32_t nfds;
fd_set *readfds;
@ -854,13 +847,6 @@ typedef struct {
} mess_lc_vm_getphys;
_ASSERT_MSG_SIZE(mess_lc_vm_getphys);
typedef struct {
vir_bytes addr;
uint8_t padding[52];
} mess_lc_vm_rusage;
_ASSERT_MSG_SIZE(mess_lc_vm_rusage);
typedef struct {
endpoint_t forwhom;
void *addr;
@ -1368,6 +1354,15 @@ typedef struct {
} mess_lsys_vm_query_exit;
_ASSERT_MSG_SIZE(mess_lsys_vm_query_exit);
typedef struct {
endpoint_t endpt;
vir_bytes addr;
int children;
uint8_t padding[44];
} mess_lsys_vm_rusage;
_ASSERT_MSG_SIZE(mess_lsys_vm_rusage);
typedef struct {
endpoint_t ep;
void *vaddr;
@ -2117,7 +2112,6 @@ typedef struct noxfer_message {
mess_lc_vfs_pipe2 m_lc_vfs_pipe2;
mess_lc_vfs_readlink m_lc_vfs_readlink;
mess_lc_vfs_readwrite m_lc_vfs_readwrite;
mess_lc_vfs_rusage m_lc_vfs_rusage;
mess_lc_vfs_select m_lc_vfs_select;
mess_lc_vfs_stat m_lc_vfs_stat;
mess_lc_vfs_statvfs1 m_lc_vfs_statvfs1;
@ -2126,7 +2120,6 @@ typedef struct noxfer_message {
mess_lc_vfs_umount m_lc_vfs_umount;
mess_lc_vm_brk m_lc_vm_brk;
mess_lc_vm_getphys m_lc_vm_getphys;
mess_lc_vm_rusage m_lc_vm_rusage;
mess_lc_vm_shm_unmap m_lc_vm_shm_unmap;
mess_lchardriver_vfs_reply m_lchardriver_vfs_reply;
mess_lchardriver_vfs_sel1 m_lchardriver_vfs_sel1;
@ -2183,6 +2176,7 @@ typedef struct noxfer_message {
mess_lsys_vm_info m_lsys_vm_info;
mess_lsys_vm_map_phys m_lsys_vm_map_phys;
mess_lsys_vm_query_exit m_lsys_vm_query_exit;
mess_lsys_vm_rusage m_lsys_vm_rusage;
mess_lsys_vm_unmap_phys m_lsys_vm_unmap_phys;
mess_lsys_vm_update m_lsys_vm_update;
mess_lsys_vm_vmremap m_lsys_vm_vmremap;

1
minix/include/minix/syslib.h
View File

@ -190,7 +190,6 @@ int sys_diagctl(int ctl, char *arg1, int arg2);
#define sys_getpriv(dst, nr) sys_getinfo(GET_PRIV, dst, 0,0, nr)
#define sys_getidletsc(dst) sys_getinfo(GET_IDLETSC, dst, 0,0,0)
#define sys_getregs(dst,nr) sys_getinfo(GET_REGS, dst, 0,0, nr)
#define sys_getrusage(dst, nr) sys_getinfo(GET_RUSAGE, dst, 0,0, nr)
int sys_getinfo(int request, void *val_ptr, int val_len, void *val_ptr2,
int val_len2);
int sys_whoami(endpoint_t *ep, char *name, int namelen, int

1
minix/include/minix/vm.h
View File

@ -8,6 +8,7 @@
int vm_exit(endpoint_t ep);
int vm_fork(endpoint_t ep, int slotno, endpoint_t *child_ep);
int vm_getrusage(endpoint_t endpt, void *addr, int children);
int vm_willexit(endpoint_t ep);
int vm_adddma(endpoint_t proc_e, phys_bytes start, phys_bytes size);
int vm_deldma(endpoint_t proc_e, phys_bytes start, phys_bytes size);

25
minix/kernel/system/do_getinfo.c
View File

@ -189,31 +189,6 @@ int do_getinfo(struct proc * caller, message * m_ptr)
src_vir = (vir_bytes) &idl->p_cycles;
break;
}
case GET_RUSAGE: {
struct proc *target = NULL;
int target_slot = 0;
u64_t usec;
nr_e = (m_ptr->m_lsys_krn_sys_getinfo.val_len2_e == SELF) ?
caller->p_endpoint : m_ptr->m_lsys_krn_sys_getinfo.val_len2_e;
if (!isokendpt(nr_e, &target_slot))
return EINVAL;
target = proc_addr(target_slot);
if (isemptyp(target))
return EINVAL;
length = sizeof(r_usage);
memset(&r_usage, 0, sizeof(r_usage));
usec = target->p_user_time * 1000000 / system_hz;
r_usage.ru_utime.tv_sec = usec / 1000000;
r_usage.ru_utime.tv_usec = usec % 1000000;
usec = target->p_sys_time * 1000000 / system_hz;
r_usage.ru_stime.tv_sec = usec / 1000000;
r_usage.ru_stime.tv_usec = usec % 1000000;
src_vir = (vir_bytes) &r_usage;
break;
}
default:
printf("do_getinfo: invalid request %d\n",
m_ptr->m_lsys_krn_sys_getinfo.request);

26
minix/lib/libc/sys/getrusage.c
View File

@ -6,34 +6,14 @@
#include <unistd.h>
#include <sys/resource.h>
int getrusage(int who, struct rusage *r_usage)
int
getrusage(int who, struct rusage * r_usage)
{
int rc;
message m;
memset(&m, 0, sizeof(m));
m.m_lc_pm_rusage.who = who;
m.m_lc_pm_rusage.addr = (vir_bytes)r_usage;
if (r_usage == NULL) {
errno = EFAULT;
return -1;
}
if (who != RUSAGE_SELF && who != RUSAGE_CHILDREN) {
errno = EINVAL;
return -1;
}
memset(r_usage, 0, sizeof(struct rusage));
if ((rc = _syscall(PM_PROC_NR, PM_GETRUSAGE, &m)) < 0)
return rc;
memset(&m, 0, sizeof(m));
m.m_lc_vfs_rusage.addr = (vir_bytes)r_usage;
if ((rc = _syscall(VFS_PROC_NR, VFS_GETRUSAGE, &m)) < 0)
return rc;
memset(&m, 0, sizeof(m));
m.m_lc_vm_rusage.addr = (vir_bytes)r_usage;
return _syscall(VM_PROC_NR, VM_GETRUSAGE, &m);
return _syscall(PM_PROC_NR, PM_GETRUSAGE, &m);
}

1
minix/lib/libsys/Makefile
View File

@ -94,6 +94,7 @@ SRCS+= \
vm_cache.c \
vm_exit.c \
vm_fork.c \
vm_getrusage.c \
vm_info.c \
vm_map_phys.c \
vm_memctl.c \

17
minix/lib/libsys/vm_getrusage.c Normal file
View File

@ -0,0 +1,17 @@
#include "syslib.h"
#include <string.h>
#include <minix/vm.h>
int
vm_getrusage(endpoint_t endpt, void * addr, int children)
{
message m;
memset(&m, 0, sizeof(m));
m.m_lsys_vm_rusage.endpt = endpt;
m.m_lsys_vm_rusage.addr = (vir_bytes)addr;
m.m_lsys_vm_rusage.children = children;
return _taskcall(VM_PROC_NR, VM_GETRUSAGE, &m);
}

64
minix/servers/pm/misc.c
View File

@ -7,6 +7,7 @@
* do_getepinfo: get the pid/uid/gid of a process given its endpoint
* do_getsetpriority: get/set process priority
* do_svrctl: process manager control
* do_getrusage: obtain process resource usage information
*/
#include "pm.h"
@ -404,28 +405,57 @@ int do_svrctl(void)
/*===========================================================================*
* do_getrusage *
*===========================================================================*/
int do_getrusage()
int
do_getrusage(void)
{
int res = 0;
clock_t user_time = 0;
clock_t sys_time = 0;
clock_t user_time, sys_time;
struct rusage r_usage;
u64_t usec;
if (m_in.m_lc_pm_rusage.who != RUSAGE_SELF &&
m_in.m_lc_pm_rusage.who != RUSAGE_CHILDREN)
return EINVAL;
if ((res = sys_getrusage(&r_usage, who_e)) < 0)
return res;
int r, children;
if (m_in.m_lc_pm_rusage.who == RUSAGE_CHILDREN) {
usec = mp->mp_child_utime * 1000000 / sys_hz();
r_usage.ru_utime.tv_sec = usec / 1000000;
r_usage.ru_utime.tv_usec = usec % 1000000;
usec = mp->mp_child_stime * 1000000 / sys_hz();
r_usage.ru_stime.tv_sec = usec / 1000000;
r_usage.ru_stime.tv_usec = usec % 1000000;
if (m_in.m_lc_pm_rusage.who != RUSAGE_SELF &&
m_in.m_lc_pm_rusage.who != RUSAGE_CHILDREN)
return EINVAL;
/*
* TODO: first relay the call to VFS. As is, VFS does not have any
* fields it can fill with meaningful values, but this may change in
* the future. In that case, PM would first have to use the tell_vfs()
* system to get those values from VFS, and do the rest here upon
* getting the response.
*/
memset(&r_usage, 0, sizeof(r_usage));
children = (m_in.m_lc_pm_rusage.who == RUSAGE_CHILDREN);
/*
* Get system times. For RUSAGE_SELF, get the times for the calling
* process from the kernel. For RUSAGE_CHILDREN, we already have the
* values we should return right here.
*/
if (!children) {
if ((r = sys_times(who_e, &user_time, &sys_time, NULL,
NULL)) != OK)
return r;
} else {
user_time = mp->mp_child_utime;
sys_time = mp->mp_child_stime;
}
/* In both cases, convert from clock ticks to microseconds. */
usec = user_time * 1000000 / sys_hz();
r_usage.ru_utime.tv_sec = usec / 1000000;
r_usage.ru_utime.tv_usec = usec % 1000000;
usec = sys_time * 1000000 / sys_hz();
r_usage.ru_stime.tv_sec = usec / 1000000;
r_usage.ru_stime.tv_usec = usec % 1000000;
/* Get additional fields from VM. */
if ((r = vm_getrusage(who_e, &r_usage, children)) != OK)
return r;
/* Finally copy the structure to the caller. */
return sys_datacopy(SELF, (vir_bytes)&r_usage, who_e,
m_in.m_lc_pm_rusage.addr, (vir_bytes) sizeof(r_usage));
m_in.m_lc_pm_rusage.addr, (vir_bytes)sizeof(r_usage));
}

18
minix/servers/vfs/misc.c
View File

@ -966,16 +966,10 @@ void panic_hook(void)
*===========================================================================*/
int do_getrusage(void)
{
int res;
struct rusage r_usage;
if ((res = sys_datacopy_wrapper(who_e, m_in.m_lc_vfs_rusage.addr, SELF,
(vir_bytes) &r_usage, (vir_bytes) sizeof(r_usage))) < 0)
return res;
r_usage.ru_inblock = 0;
r_usage.ru_oublock = 0;
return sys_datacopy_wrapper(SELF, (vir_bytes) &r_usage, who_e,
m_in.m_lc_vfs_rusage.addr, (phys_bytes) sizeof(r_usage));
/* Obsolete vfs_getrusage(2) call from userland. The getrusage call is
* now fully handled by PM, and for any future fields that should be
* supplied by VFS, VFS should be queried by PM rather than by the user
* program directly. TODO: remove this call after the next release.
*/
return OK;
}

2
minix/servers/vfs/table.c
View File

@ -57,7 +57,7 @@ int (* const call_vec[NR_VFS_CALLS])(void) = {
CALL(VFS_GETVFSSTAT) = do_getvfsstat, /* getvfsstat(2) */
CALL(VFS_STATVFS1) = do_statvfs, /* statvfs(2) */
CALL(VFS_FSTATVFS1) = do_fstatvfs, /* fstatvfs(2) */
CALL(VFS_GETRUSAGE) = do_getrusage, /* getrusage(2) */
CALL(VFS_GETRUSAGE) = do_getrusage, /* (obsolete) */
CALL(VFS_SVRCTL) = do_svrctl, /* svrctl(2) */
CALL(VFS_GCOV_FLUSH) = do_gcov_flush, /* gcov_flush(2) */
CALL(VFS_MAPDRIVER) = do_mapdriver, /* mapdriver(2) */

38
minix/servers/vm/utility.c
View File

@ -429,21 +429,47 @@ int do_getrusage(message *m)
int res, slot;
struct vmproc *vmp;
struct rusage r_usage;
if ((res = vm_isokendpt(m->m_source, &slot)) != OK)
/* If the request is not from PM, it is coming directly from userland.
* This is an obsolete construction. In the future, userland programs
* should no longer be allowed to call vm_getrusage(2) directly at all.
* For backward compatibility, we simply return success for now.
*/
if (m->m_source != PM_PROC_NR)
return OK;
/* Get the process for which resource usage is requested. */
if ((res = vm_isokendpt(m->m_lsys_vm_rusage.endpt, &slot)) != OK)
return ESRCH;
vmp = &vmproc[slot];
if ((res = sys_datacopy(m->m_source, m->m_lc_vm_rusage.addr,
/* We are going to change only a few fields, so copy in the rusage
* structure first. The structure is still in PM's address space at
* this point, so use the message source.
*/
if ((res = sys_datacopy(m->m_source, m->m_lsys_vm_rusage.addr,
SELF, (vir_bytes) &r_usage, (vir_bytes) sizeof(r_usage))) < 0)
return res;
r_usage.ru_maxrss = vmp->vm_total_max;
r_usage.ru_minflt = vmp->vm_minor_page_fault;
r_usage.ru_majflt = vmp->vm_major_page_fault;
if (!m->m_lsys_vm_rusage.children) {
r_usage.ru_maxrss = vmp->vm_total_max / 1024L; /* unit is KB */
r_usage.ru_minflt = vmp->vm_minor_page_fault;
r_usage.ru_majflt = vmp->vm_major_page_fault;
} else {
/* XXX TODO: return the fields for terminated, waited-for
* children of the given process. We currently do not have this
* information! In the future, rather than teaching VM about
* the process hierarchy, PM should probably tell VM at process
* exit time which other process should inherit its resource
* usage fields. For now, we assume PM clears the fields before
* making this call, so we don't zero the fields explicitly.
*/
}
/* Copy out the resulting structure back to PM. */
return sys_datacopy(SELF, (vir_bytes) &r_usage, m->m_source,
m->m_lc_vm_rusage.addr, (vir_bytes) sizeof(r_usage));
m->m_lsys_vm_rusage.addr, (vir_bytes) sizeof(r_usage));
}
/*===========================================================================*

2
minix/tests/test75.c
View File

@ -72,7 +72,6 @@ main(int argc, char *argv[])
e(1);
exit(1);
}
CHECK_NOT_ZERO_FIELD(r_usage2, ru_maxrss);
if ((child = fork()) == 0) {
/*
* We cannot do this part of the test in the parent, since
@ -100,7 +99,6 @@ main(int argc, char *argv[])
exit(1);
}
CHECK_NOT_ZERO_FIELD(r_usage3, ru_utime.tv_sec);
CHECK_NOT_ZERO_FIELD(r_usage3, ru_maxrss);
}
quit();

6
minix/usr.bin/trace/service/pm.c
View File

@ -1240,6 +1240,12 @@ pm_getrusage_in(struct trace_proc * proc, const message * m_out,
put_struct_timeval(proc, "ru_stime", PF_LOCADDR,
(vir_bytes)&buf.ru_stime);
if (verbose > 0) {
put_value(proc, "ru_maxrss", "%ld", buf.ru_maxrss);
put_value(proc, "ru_minflt", "%ld", buf.ru_minflt);
put_value(proc, "ru_majflt", "%ld", buf.ru_majflt);
}
put_close_struct(proc, verbose > 0);
}
put_equals(proc);

31
minix/usr.bin/trace/service/vfs.c
View File

@ -1327,35 +1327,6 @@ vfs_fstatvfs1_out(struct trace_proc * proc, const message * m_out)
return CT_NOTDONE;
}
static int
vfs_getrusage_out(struct trace_proc * __unused proc,
const message * __unused m_out)
{
return CT_NOTDONE;
}
static void
vfs_getrusage_in(struct trace_proc * proc, const message * m_out,
const message * __unused m_in, int failed)
{
struct rusage buf;
/* Inline; we will certainly not be reusing this anywhere else. */
if (put_open_struct(proc, "rusage", failed,
m_out->m_lc_vfs_rusage.addr, &buf, sizeof(buf))) {
/* Reason for hiding these two better: they're always zero. */
if (verbose > 1) {
put_value(proc, "ru_inblock", "%ld", buf.ru_inblock);
put_value(proc, "ru_oublock", "%ld", buf.ru_oublock);
}
put_close_struct(proc, verbose > 1);
}
put_equals(proc);
put_result(proc);
}
static int
vfs_svrctl_out(struct trace_proc * proc, const message * m_out)
{
@ -1437,8 +1408,6 @@ static const struct call_handler vfs_map[] = {
vfs_statvfs1_in),
VFS_CALL(FSTATVFS1) = HANDLER("fstatvfs1", vfs_fstatvfs1_out,
vfs_statvfs1_in),
VFS_CALL(GETRUSAGE) = HANDLER("vfs_getrusage", vfs_getrusage_out,
vfs_getrusage_in),
VFS_CALL(SVRCTL) = HANDLER("vfs_svrctl", vfs_svrctl_out,
vfs_svrctl_in),
VFS_CALL(GCOV_FLUSH) = HANDLER("gcov_flush", vfs_gcov_flush_out,

31
minix/usr.bin/trace/service/vm.c
View File

@ -88,43 +88,12 @@ vm_munmap_out(struct trace_proc * proc, const message * m_out)
return CT_DONE;
}
static int
vm_getrusage_out(struct trace_proc * __unused proc,
const message * __unused m_out)
{
return CT_NOTDONE;
}
static void
vm_getrusage_in(struct trace_proc * proc, const message * m_out,
const message * __unused m_in, int failed)
{
struct rusage buf;
/* Inline; we will certainly not be reusing this anywhere else. */
if (put_open_struct(proc, "rusage", failed,
m_out->m_lc_vm_rusage.addr, &buf, sizeof(buf))) {
if (verbose > 0) {
put_value(proc, "ru_maxrss", "%ld", buf.ru_maxrss);
put_value(proc, "ru_minflt", "%ld", buf.ru_minflt);
put_value(proc, "ru_majflt", "%ld", buf.ru_majflt);
}
put_close_struct(proc, verbose > 0);
}
put_equals(proc);
put_result(proc);
}
#define VM_CALL(c) [((VM_ ## c) - VM_RQ_BASE)]
static const struct call_handler vm_map[] = {
VM_CALL(BRK) = HANDLER("brk", vm_brk_out, default_in),
VM_CALL(MMAP) = HANDLER("mmap", vm_mmap_out, vm_mmap_in),
VM_CALL(MUNMAP) = HANDLER("munmap", vm_munmap_out, default_in),
VM_CALL(GETRUSAGE) = HANDLER("vm_getrusage", vm_getrusage_out,
vm_getrusage_in),
};
const struct calls vm_calls = {