Displaying 4 results from an estimated 4 matches for "csched_credits_per_msec".
2011 Sep 01
4
[PATCH] xen,credit1: Add variable timeslice
...256
#define CSCHED_TICKS_PER_TSLICE 3
-#define CSCHED_TICKS_PER_ACCT 3
-#define CSCHED_MSECS_PER_TICK 10
-#define CSCHED_MSECS_PER_TSLICE \
- (CSCHED_MSECS_PER_TICK * CSCHED_TICKS_PER_TSLICE)
+/* Default timeslice: 30ms */
+#define CSCHED_DEFAULT_TSLICE_MS 30
#define CSCHED_CREDITS_PER_MSEC 10
-#define CSCHED_CREDITS_PER_TSLICE \
- (CSCHED_CREDITS_PER_MSEC * CSCHED_MSECS_PER_TSLICE)
-#define CSCHED_CREDITS_PER_ACCT \
- (CSCHED_CREDITS_PER_MSEC * CSCHED_MSECS_PER_TICK * CSCHED_TICKS_PER_ACCT)
/*
@@ -113,6 +107,8 @@
*/
static bool_t __read_mostly sched_credit_def...
2013 Nov 13
3
[Patch] credit: Update other parameters when setting tslice_ms
...>tslice_ms = timeslice;
+ prv->ticks_per_tslice = CSCHED_TICKS_PER_TSLICE;
+ if ( prv->tslice_ms < prv->ticks_per_tslice )
+ prv->ticks_per_tslice = 1;
+ prv->tick_period_us = prv->tslice_ms * 1000 / prv->ticks_per_tslice;
+ prv->credits_per_tslice = CSCHED_CREDITS_PER_MSEC * prv->tslice_ms;
+}
+
static int
csched_sys_cntl(const struct scheduler *ops,
struct xen_sysctl_scheduler_op *sc)
@@ -1089,7 +1100,7 @@ csched_sys_cntl(const struct scheduler *ops,
|| params->ratelimit_us < XEN_SYSCTL_SCHED_RATELIMIT_MIN))...
2013 Sep 02
5
[BUG] unfairness in Xen's credit scheduler
...should also be changed */
prv->ticks_per_tslice = CSCHED_TICKS_PER_TSLICE;
if ( prv->tslice_ms < prv->ticks_per_tslice )
prv->ticks_per_tslice = 1;
prv->tick_period_us = prv->tslice_ms * 1000 / prv->ticks_per_tslice;
prv->credits_per_tslice = CSCHED_CREDITS_PER_MSEC * prv->tslice_ms;
-------
...
}
Particularly, [prv->credits_per_tslice] is very important to maintain
the *fairness* of credit allocation in csched_acct().
This bug has been there since Xen-4.2.0.
Thanks,
CHENG Luwei
--
PhD student
Department of Computer Science
The University of Hong...
2011 Dec 06
57
[PATCH RFC 00/25] xen: ARMv7 with virtualization extensions
Hello everyone,
this is the very first version of the patch series that introduces ARMv7
with virtualization extensions support in Xen.
The series allows Xen and Dom0 to boot on a Cortex-A15 based Versatile
Express simulator.
See the following announce email for more informations about what we
are trying to achieve, as well as the original git history:
See