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author | Kevin Lim <ktlim@umich.edu> | 2006-06-04 16:07:54 -0400 |
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committer | Kevin Lim <ktlim@umich.edu> | 2006-06-04 16:07:54 -0400 |
commit | 984c2a4ff677803ff7687a178f1dceb1f0204c30 (patch) | |
tree | 10dc244225a4e29a65a94cc83305a2d18d150526 /src/cpu/activity.hh | |
parent | 3156f601db2728d329d9eff272bfa324ebdb2a0c (diff) | |
parent | 8671d927d862cdbdf851e74cd07d131679faa7ed (diff) | |
download | gem5-984c2a4ff677803ff7687a178f1dceb1f0204c30.tar.xz |
Merge ktlim@zamp:/z/ktlim2/clean/m5-o3
into zamp.eecs.umich.edu:/z/ktlim2/clean/newmem-merge
src/cpu/checker/o3_cpu_builder.cc:
src/cpu/o3/alpha_cpu.hh:
src/cpu/o3/alpha_cpu_impl.hh:
src/cpu/o3/alpha_dyn_inst_impl.hh:
src/cpu/o3/bpred_unit.cc:
src/cpu/o3/commit.hh:
src/cpu/o3/fetch_impl.hh:
src/cpu/o3/lsq_unit.hh:
src/cpu/o3/lsq_unit_impl.hh:
src/cpu/o3/thread_state.hh:
Hand merge.
--HG--
rename : cpu/activity.cc => src/cpu/activity.cc
rename : cpu/activity.hh => src/cpu/activity.hh
rename : cpu/base_dyn_inst.cc => src/cpu/base_dyn_inst.cc
rename : cpu/checker/cpu.hh => src/cpu/checker/cpu.hh
rename : cpu/checker/cpu_builder.cc => src/cpu/checker/cpu_builder.cc
rename : cpu/checker/exec_context.hh => src/cpu/checker/exec_context.hh
rename : cpu/checker/o3_cpu_builder.cc => src/cpu/checker/o3_cpu_builder.cc
rename : cpu/o3/2bit_local_pred.cc => src/cpu/o3/2bit_local_pred.cc
rename : cpu/o3/2bit_local_pred.hh => src/cpu/o3/2bit_local_pred.hh
rename : cpu/o3/alpha_cpu.hh => src/cpu/o3/alpha_cpu.hh
rename : cpu/o3/alpha_cpu_builder.cc => src/cpu/o3/alpha_cpu_builder.cc
rename : cpu/o3/alpha_cpu_impl.hh => src/cpu/o3/alpha_cpu_impl.hh
rename : cpu/o3/alpha_dyn_inst.hh => src/cpu/o3/alpha_dyn_inst.hh
rename : cpu/o3/alpha_dyn_inst_impl.hh => src/cpu/o3/alpha_dyn_inst_impl.hh
rename : cpu/o3/alpha_params.hh => src/cpu/o3/alpha_params.hh
rename : cpu/o3/bpred_unit.cc => src/cpu/o3/bpred_unit.cc
rename : cpu/o3/bpred_unit.hh => src/cpu/o3/bpred_unit.hh
rename : cpu/o3/bpred_unit_impl.hh => src/cpu/o3/bpred_unit_impl.hh
rename : cpu/o3/comm.hh => src/cpu/o3/comm.hh
rename : cpu/o3/commit.hh => src/cpu/o3/commit.hh
rename : cpu/o3/commit_impl.hh => src/cpu/o3/commit_impl.hh
rename : cpu/o3/cpu.hh => src/cpu/o3/cpu.hh
rename : cpu/o3/cpu_policy.hh => src/cpu/o3/cpu_policy.hh
rename : cpu/o3/decode.hh => src/cpu/o3/decode.hh
rename : cpu/o3/decode_impl.hh => src/cpu/o3/decode_impl.hh
rename : cpu/o3/dep_graph.hh => src/cpu/o3/dep_graph.hh
rename : cpu/o3/fetch.hh => src/cpu/o3/fetch.hh
rename : cpu/o3/fetch_impl.hh => src/cpu/o3/fetch_impl.hh
rename : cpu/o3/fu_pool.cc => src/cpu/o3/fu_pool.cc
rename : cpu/o3/fu_pool.hh => src/cpu/o3/fu_pool.hh
rename : cpu/o3/iew.hh => src/cpu/o3/iew.hh
rename : cpu/o3/iew_impl.hh => src/cpu/o3/iew_impl.hh
rename : cpu/o3/inst_queue.hh => src/cpu/o3/inst_queue.hh
rename : cpu/o3/inst_queue_impl.hh => src/cpu/o3/inst_queue_impl.hh
rename : cpu/o3/lsq.hh => src/cpu/o3/lsq.hh
rename : cpu/o3/lsq_unit.hh => src/cpu/o3/lsq_unit.hh
rename : cpu/o3/lsq_unit_impl.hh => src/cpu/o3/lsq_unit_impl.hh
rename : cpu/o3/mem_dep_unit.hh => src/cpu/o3/mem_dep_unit.hh
rename : cpu/o3/mem_dep_unit_impl.hh => src/cpu/o3/mem_dep_unit_impl.hh
rename : cpu/o3/rename.hh => src/cpu/o3/rename.hh
rename : cpu/o3/rename_impl.hh => src/cpu/o3/rename_impl.hh
rename : cpu/o3/rename_map.hh => src/cpu/o3/rename_map.hh
rename : cpu/o3/rob.hh => src/cpu/o3/rob.hh
rename : cpu/o3/store_set.cc => src/cpu/o3/store_set.cc
rename : cpu/o3/store_set.hh => src/cpu/o3/store_set.hh
rename : cpu/o3/thread_state.hh => src/cpu/o3/thread_state.hh
rename : cpu/o3/tournament_pred.cc => src/cpu/o3/tournament_pred.cc
rename : cpu/o3/tournament_pred.hh => src/cpu/o3/tournament_pred.hh
rename : cpu/ozone/cpu_builder.cc => src/cpu/ozone/cpu_builder.cc
rename : cpu/ozone/ozone_impl.hh => src/cpu/ozone/ozone_impl.hh
rename : cpu/ozone/simple_impl.hh => src/cpu/ozone/simple_impl.hh
rename : cpu/ozone/simple_params.hh => src/cpu/ozone/simple_params.hh
rename : python/m5/objects/AlphaFullCPU.py => src/python/m5/objects/AlphaFullCPU.py
rename : python/m5/objects/OzoneCPU.py => src/python/m5/objects/OzoneCPU.py
extra : convert_revision : b7be30474dd03dd3970e737a9d0489aeb2ead84f
Diffstat (limited to 'src/cpu/activity.hh')
-rw-r--r-- | src/cpu/activity.hh | 63 |
1 files changed, 60 insertions, 3 deletions
diff --git a/src/cpu/activity.hh b/src/cpu/activity.hh index 2d53dc4bb..2c0df5efb 100644 --- a/src/cpu/activity.hh +++ b/src/cpu/activity.hh @@ -1,3 +1,30 @@ +/* + * Copyright (c) 2006 The Regents of The University of Michigan + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer; + * redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution; + * neither the name of the copyright holders nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ #ifndef __CPU_ACTIVITY_HH__ #define __CPU_ACTIVITY_HH__ @@ -5,33 +32,61 @@ #include "base/timebuf.hh" #include "base/trace.hh" +/** + * ActivityRecorder helper class that informs the CPU if it can switch + * over to being idle or not. It works by having a time buffer as + * long as any time buffer in the CPU, and the CPU and all of its + * stages inform the ActivityRecorder when they write to any time + * buffer. The ActivityRecorder marks a 1 in the "0" slot of the time + * buffer any time a stage writes to a time buffer, and it advances + * its time buffer at the same time as all other stages. The + * ActivityRecorder also records if a stage has activity to do next + * cycle. The recorder keeps a count of these two. Thus any time the + * count is non-zero, there is either communication still in flight, + * or activity that still must be done, meaning that the CPU can not + * idle. If count is zero, then the CPU can safely idle as it has no + * more outstanding work to do. + */ class ActivityRecorder { public: ActivityRecorder(int num_stages, int longest_latency, int count); /** Records that there is activity this cycle. */ void activity(); - /** Advances the activity buffer, decrementing the activityCount if active - * communication just left the time buffer, and descheduling the CPU if - * there is no activity. + + /** Advances the activity buffer, decrementing the activityCount + * if active communication just left the time buffer, and + * determining if there is no activity. */ void advance(); + /** Marks a stage as active. */ void activateStage(const int idx); + /** Deactivates a stage. */ void deactivateStage(const int idx); + /** Returns how many things are active within the recorder. */ int getActivityCount() { return activityCount; } + /** Sets the count to a starting value. Can be used to disable + * the idling option. + */ void setActivityCount(int count) { activityCount = count; } + /** Returns if the CPU should be active. */ bool active() { return activityCount; } + /** Clears the time buffer and the activity count. */ void reset(); + /** Debug function to dump the contents of the time buffer. */ void dump(); + /** Debug function to ensure that the activity count matches the + * contents of the time buffer. + */ void validate(); private: @@ -45,6 +100,7 @@ class ActivityRecorder { */ TimeBuffer<bool> activityBuffer; + /** Longest latency time buffer in the CPU. */ int longestLatency; /** Tracks how many stages and cycles of time buffer have @@ -58,6 +114,7 @@ class ActivityRecorder { */ int activityCount; + /** Number of stages that can be marked as active or inactive. */ int numStages; /** Records which stages are active/inactive. */ |