Author: ed
Date: Mon May 18 12:03:43 2009
New Revision: 192304
URL: http://svn.freebsd.org/changeset/base/192304
Log:
Mark the clock sysctls as MPSAFE.
These sysctls don't need any form of locking. At least cp_times is used
by powerd very often, which means I get 50% less calls to non-MPSAFE
sysctls on my system. The other 50% is consumed by dev.cpu.0.freq, but
this seems to need Giant for Newbus.
Modified:
head/sys/kern/kern_clock.c
Modified: head/sys/kern/kern_clock.c
==============================================================================
--- head/sys/kern/kern_clock.c Mon May 18 11:23:15 2009 (r192303)
+++ head/sys/kern/kern_clock.c Mon May 18 12:03:43 2009 (r192304)
@@ -112,7 +112,7 @@ sysctl_kern_cp_time(SYSCTL_HANDLER_ARGS)
return error;
}
-SYSCTL_PROC(_kern, OID_AUTO, cp_time, CTLTYPE_LONG|CTLFLAG_RD,
+SYSCTL_PROC(_kern, OID_AUTO, cp_time, CTLTYPE_LONG|CTLFLAG_RD|CTLFLAG_MPSAFE,
0,0, sysctl_kern_cp_time, "LU", "CPU time statistics");
static long empty[CPUSTATES];
@@ -156,7 +156,7 @@ sysctl_kern_cp_times(SYSCTL_HANDLER_ARGS
return error;
}
-SYSCTL_PROC(_kern, OID_AUTO, cp_times, CTLTYPE_LONG|CTLFLAG_RD,
+SYSCTL_PROC(_kern, OID_AUTO, cp_times, CTLTYPE_LONG|CTLFLAG_RD|CTLFLAG_MPSAFE,
0,0, sysctl_kern_cp_times, "LU", "per-CPU time statistics");
void
@@ -559,7 +559,8 @@ sysctl_kern_clockrate(SYSCTL_HANDLER_ARG
return (sysctl_handle_opaque(oidp, &clkinfo, sizeof clkinfo, req));
}
-SYSCTL_PROC(_kern, KERN_CLOCKRATE, clockrate, CTLTYPE_STRUCT|CTLFLAG_RD,
+SYSCTL_PROC(_kern, KERN_CLOCKRATE, clockrate,
+ CTLTYPE_STRUCT|CTLFLAG_RD|CTLFLAG_MPSAFE,
0, 0, sysctl_kern_clockrate, "S,clockinfo",
"Rate and period of various kernel clocks");
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