the <option>-C</option> or <option>-i</option> options.
However, setting <option>-V</option> is required in order to
increase the resolution of the time profiler.</para>
+
+ <para>Using a value of zero disables the RTS clock
+ completetly, and has the effect of disabling timers that
+ depend on it: the context switch timer and the heap profiling
+ timer. Context switches will still happen, but
+ deterministically and at a rate much faster than normal.
+ Disabling the interval timer is useful for debugging, because
+ it eliminates a source of non-determinism at runtime.</para>
</listitem>
</varlistentry>
SRC_CC_OPTS += -fno-strict-aliasing
# Cmm must be compiled via-C for now, because the NCG can't handle loops
-SRC_HC_OPTS += -fvia-C
+# SRC_HC_OPTS += -fvia-C
# We *want* type-checking of hand-written cmm.
SRC_HC_OPTS += -dcmm-lint
}
}
- // Determine what tick interval we should use for the RTS timer
- // by taking the shortest of the various intervals that we need to
- // monitor.
- if (RtsFlags.MiscFlags.tickInterval <= 0) {
+ if (RtsFlags.MiscFlags.tickInterval < 0) {
RtsFlags.MiscFlags.tickInterval = 50;
}
+ // If the master timer is disabled, turn off the other timers.
+ if (RtsFlags.MiscFlags.tickInterval == 0) {
+ RtsFlags.ConcFlags.ctxtSwitchTime = 0;
+ RtsFlags.GcFlags.idleGCDelayTime = 0;
+ RtsFlags.ProfFlags.profileInterval = 0;
+ }
+
+ // Determine what tick interval we should use for the RTS timer
+ // by taking the shortest of the various intervals that we need to
+ // monitor.
if (RtsFlags.ConcFlags.ctxtSwitchTime > 0) {
RtsFlags.MiscFlags.tickInterval =
stg_min(RtsFlags.ConcFlags.ctxtSwitchTime,
RtsFlags.ConcFlags.ctxtSwitchTicks = 0;
}
- RtsFlags.ProfFlags.profileIntervalTicks =
- RtsFlags.ProfFlags.profileInterval / RtsFlags.MiscFlags.tickInterval;
+ if (RtsFlags.ProfFlags.profileInterval > 0) {
+ RtsFlags.ProfFlags.profileIntervalTicks =
+ RtsFlags.ProfFlags.profileInterval /
+ RtsFlags.MiscFlags.tickInterval;
+ } else {
+ RtsFlags.ProfFlags.profileIntervalTicks = 0;
+ }
if (error) {
const char **p;