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init: Add support for specifying a services i/o priority

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Signed-off-by: San Mehat <san@google.com>
This commit is contained in:
San Mehat 2010-02-25 14:19:50 -08:00
parent 1bfb4803ea
commit 4e221f0077
4 changed files with 39 additions and 0 deletions
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8
init/init.c
View file

@ -35,6 +35,7 @@
#include <sys/reboot.h>
#include <cutils/sockets.h>
#include <cutils/iosched_policy.h>
#include <termios.h>
#include <linux/kd.h>
#include <linux/keychord.h>
@ -224,6 +225,13 @@ void service_start(struct service *svc, const char *dynamic_args)
}
}
if (svc->ioprio_class != IoSchedClass_NONE) {
if (android_set_ioprio(getpid(), svc->ioprio_class, svc->ioprio_pri)) {
ERROR("Failed to set pid %d ioprio = %d,%d: %s\n",
getpid(), svc->ioprio_class, svc->ioprio_pri, strerror(errno));
}
}
if (needs_console) {
setsid();
open_console();

3
init/init.h
View file

@ -146,6 +146,9 @@ struct service {
int nkeycodes;
int keychord_id;
int ioprio_class;
int ioprio_pri;
int nargs;
/* "MUST BE AT THE END OF THE STRUCT" */
char *args[1];

1
init/keywords.h
View file

@ -75,6 +75,7 @@ enum {
KEYWORD(chmod, COMMAND, 2, do_chmod)
KEYWORD(loglevel, COMMAND, 1, do_loglevel)
KEYWORD(device, COMMAND, 4, do_device)
KEYWORD(ioprio, OPTION, 0, 0)
#ifdef __MAKE_KEYWORD_ENUM__
KEYWORD_COUNT,
};

27
init/parser.c
View file

@ -10,6 +10,8 @@
#include "init.h"
#include "property_service.h"
#include <cutils/iosched_policy.h>
#define _REALLY_INCLUDE_SYS__SYSTEM_PROPERTIES_H_
#include <sys/_system_properties.h>
@ -155,6 +157,7 @@ int lookup_keyword(const char *s)
if (!strcmp(s, "ostname")) return K_hostname;
break;
case 'i':
if (!strcmp(s, "oprio")) return K_ioprio;
if (!strcmp(s, "fup")) return K_ifup;
if (!strcmp(s, "nsmod")) return K_insmod;
if (!strcmp(s, "mport")) return K_import;
@ -619,6 +622,8 @@ static void parse_line_service(struct parse_state *state, int nargs, char **args
return;
}
svc->ioprio_class = IoSchedClass_NONE;
kw = lookup_keyword(args[0]);
switch (kw) {
case K_capability:
@ -636,6 +641,28 @@ static void parse_line_service(struct parse_state *state, int nargs, char **args
case K_disabled:
svc->flags |= SVC_DISABLED;
break;
case K_ioprio:
if (nargs != 3) {
parse_error(state, "ioprio optin usage: ioprio <rt|be|idle> <ioprio 0-7>\n");
} else {
svc->ioprio_pri = strtoul(args[2], 0, 8);
if (svc->ioprio_pri < 0 || svc->ioprio_pri > 7) {
parse_error(state, "priority value must be range 0 - 7\n");
break;
}
if (!strcmp(args[1], "rt")) {
svc->ioprio_class = IoSchedClass_RT;
} else if (!strcmp(args[1], "be")) {
svc->ioprio_class = IoSchedClass_BE;
} else if (!strcmp(args[1], "idle")) {
svc->ioprio_class = IoSchedClass_IDLE;
} else {
parse_error(state, "ioprio option usage: ioprio <rt|be|idle> <0-7>\n");
}
}
break;
case K_group:
if (nargs < 2) {
parse_error(state, "group option requires a group id\n");