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/gem5/src/mem/cache/compressors/
H A Dbase.ccdiff 13943:4046b0c547be Tue May 29 11:30:00 EDT 2018 Daniel R. Carvalho <odanrc@yahoo.com.br> mem-cache: Add compression stats

Add compression statistics to the compressors. It tracks
the number of blocks that can fit into a certain power
of two size, and the number of decompressions.

For example, if a block is compressed to 100 bits, it will
belong to the 128-bits compression size. Although it could
also fit bigger sizes, they are not taken into account for
the stats (i.e., the 100-bit compression will fit only the
128-bits size, not 256 or higher).

We save stats for compressions that fail (i.e., compressed
size is bigger than original cache line size).

Change-Id: Idab71a40a660e33259908ccd880e42a880b5ee06
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/11103
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com>
Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
diff 13943:4046b0c547be Tue May 29 11:30:00 EDT 2018 Daniel R. Carvalho <odanrc@yahoo.com.br> mem-cache: Add compression stats

Add compression statistics to the compressors. It tracks
the number of blocks that can fit into a certain power
of two size, and the number of decompressions.

For example, if a block is compressed to 100 bits, it will
belong to the 128-bits compression size. Although it could
also fit bigger sizes, they are not taken into account for
the stats (i.e., the 100-bit compression will fit only the
128-bits size, not 256 or higher).

We save stats for compressions that fail (i.e., compressed
size is bigger than original cache line size).

Change-Id: Idab71a40a660e33259908ccd880e42a880b5ee06
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/11103
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com>
Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
H A Dbase.hhdiff 13943:4046b0c547be Tue May 29 11:30:00 EDT 2018 Daniel R. Carvalho <odanrc@yahoo.com.br> mem-cache: Add compression stats

Add compression statistics to the compressors. It tracks
the number of blocks that can fit into a certain power
of two size, and the number of decompressions.

For example, if a block is compressed to 100 bits, it will
belong to the 128-bits compression size. Although it could
also fit bigger sizes, they are not taken into account for
the stats (i.e., the 100-bit compression will fit only the
128-bits size, not 256 or higher).

We save stats for compressions that fail (i.e., compressed
size is bigger than original cache line size).

Change-Id: Idab71a40a660e33259908ccd880e42a880b5ee06
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/11103
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com>
Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
diff 13943:4046b0c547be Tue May 29 11:30:00 EDT 2018 Daniel R. Carvalho <odanrc@yahoo.com.br> mem-cache: Add compression stats

Add compression statistics to the compressors. It tracks
the number of blocks that can fit into a certain power
of two size, and the number of decompressions.

For example, if a block is compressed to 100 bits, it will
belong to the 128-bits compression size. Although it could
also fit bigger sizes, they are not taken into account for
the stats (i.e., the 100-bit compression will fit only the
128-bits size, not 256 or higher).

We save stats for compressions that fail (i.e., compressed
size is bigger than original cache line size).

Change-Id: Idab71a40a660e33259908ccd880e42a880b5ee06
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/11103
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com>
Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
/gem5/util/stats/
H A Dchart.py2006:3ca085495c69 Tue Nov 22 21:50:00 EST 2005 Nathan Binkert <binkertn@umich.edu> Major improvements in the graph output code. Mostly adding more
options, making existing options more visible and dealing with
holes in data better.

util/stats/barchart.py:
- move the options for BarChart to a base class ChartOptions so
they can be more easily set and copied.
- add an option to set the chart size (so you can adjust the aspect ratio)
- don't do the add_subplot thing, use add_axes directly so we can
affect the size of the figure itself to make room for the legend
- make the initial array bottom floating point so we don't lose precision
- add an option to set the limits on the y axis
- use a figure legend instead of an axes legend so we can put the legend
outside of the actual chart. Also add an option to set the fontsize of
the legend.
- initial hack at outputting csv files
util/stats/db.py:
don't print out an error when the run is missing from the database
just return None, the error will be print elsewhere.
util/stats/output.py:
- make StatOutput derive from ChartOptions so that it's easier to
set default chart options.
- make the various output functions (graph, display, etc.) take the
name of the data as a parameter instead of making it a parameter to
__init__. This allows me to create the StatOutput object with
generic parameters while still being able to specialize the name
after the fact
- add support for graph_group and graph_bars to be applied to multiple
configuration groups. This results in a cross product of the groups
to be generated and used.
- flush the html file output as we go so that we can load the file
while graphs are still being generated.
- make the proxy a parameter to the graph function so the proper system's
data can be graphed
- for any groups or bars that are completely missing, remove them from
the graph. This way, if we decide not to do a set of runs, there won't
be holes in the data.
- output eps and ps by default in addition to the png.
util/stats/profile.py:
- clean up the data structures that are used to store the function
profile information and try our best to avoid keeping extra data
around that isn't used.
- make get() return None if a job is missing so we know it was
missing rather than the all zeroes thing.
- make the function profile categorization stuff total up to 100%
- Fixup the x-axis and y-axis labels.
- fix the dot file output stuff.
util/stats/stats.py:
support the new options stuff for StatOutput
H A Dbarchart.pydiff 2006:3ca085495c69 Tue Nov 22 21:50:00 EST 2005 Nathan Binkert <binkertn@umich.edu> Major improvements in the graph output code. Mostly adding more
options, making existing options more visible and dealing with
holes in data better.

util/stats/barchart.py:
- move the options for BarChart to a base class ChartOptions so
they can be more easily set and copied.
- add an option to set the chart size (so you can adjust the aspect ratio)
- don't do the add_subplot thing, use add_axes directly so we can
affect the size of the figure itself to make room for the legend
- make the initial array bottom floating point so we don't lose precision
- add an option to set the limits on the y axis
- use a figure legend instead of an axes legend so we can put the legend
outside of the actual chart. Also add an option to set the fontsize of
the legend.
- initial hack at outputting csv files
util/stats/db.py:
don't print out an error when the run is missing from the database
just return None, the error will be print elsewhere.
util/stats/output.py:
- make StatOutput derive from ChartOptions so that it's easier to
set default chart options.
- make the various output functions (graph, display, etc.) take the
name of the data as a parameter instead of making it a parameter to
__init__. This allows me to create the StatOutput object with
generic parameters while still being able to specialize the name
after the fact
- add support for graph_group and graph_bars to be applied to multiple
configuration groups. This results in a cross product of the groups
to be generated and used.
- flush the html file output as we go so that we can load the file
while graphs are still being generated.
- make the proxy a parameter to the graph function so the proper system's
data can be graphed
- for any groups or bars that are completely missing, remove them from
the graph. This way, if we decide not to do a set of runs, there won't
be holes in the data.
- output eps and ps by default in addition to the png.
util/stats/profile.py:
- clean up the data structures that are used to store the function
profile information and try our best to avoid keeping extra data
around that isn't used.
- make get() return None if a job is missing so we know it was
missing rather than the all zeroes thing.
- make the function profile categorization stuff total up to 100%
- Fixup the x-axis and y-axis labels.
- fix the dot file output stuff.
util/stats/stats.py:
support the new options stuff for StatOutput
H A Doutput.pydiff 2006:3ca085495c69 Tue Nov 22 21:50:00 EST 2005 Nathan Binkert <binkertn@umich.edu> Major improvements in the graph output code. Mostly adding more
options, making existing options more visible and dealing with
holes in data better.

util/stats/barchart.py:
- move the options for BarChart to a base class ChartOptions so
they can be more easily set and copied.
- add an option to set the chart size (so you can adjust the aspect ratio)
- don't do the add_subplot thing, use add_axes directly so we can
affect the size of the figure itself to make room for the legend
- make the initial array bottom floating point so we don't lose precision
- add an option to set the limits on the y axis
- use a figure legend instead of an axes legend so we can put the legend
outside of the actual chart. Also add an option to set the fontsize of
the legend.
- initial hack at outputting csv files
util/stats/db.py:
don't print out an error when the run is missing from the database
just return None, the error will be print elsewhere.
util/stats/output.py:
- make StatOutput derive from ChartOptions so that it's easier to
set default chart options.
- make the various output functions (graph, display, etc.) take the
name of the data as a parameter instead of making it a parameter to
__init__. This allows me to create the StatOutput object with
generic parameters while still being able to specialize the name
after the fact
- add support for graph_group and graph_bars to be applied to multiple
configuration groups. This results in a cross product of the groups
to be generated and used.
- flush the html file output as we go so that we can load the file
while graphs are still being generated.
- make the proxy a parameter to the graph function so the proper system's
data can be graphed
- for any groups or bars that are completely missing, remove them from
the graph. This way, if we decide not to do a set of runs, there won't
be holes in the data.
- output eps and ps by default in addition to the png.
util/stats/profile.py:
- clean up the data structures that are used to store the function
profile information and try our best to avoid keeping extra data
around that isn't used.
- make get() return None if a job is missing so we know it was
missing rather than the all zeroes thing.
- make the function profile categorization stuff total up to 100%
- Fixup the x-axis and y-axis labels.
- fix the dot file output stuff.
util/stats/stats.py:
support the new options stuff for StatOutput
H A Dprofile.pydiff 2006:3ca085495c69 Tue Nov 22 21:50:00 EST 2005 Nathan Binkert <binkertn@umich.edu> Major improvements in the graph output code. Mostly adding more
options, making existing options more visible and dealing with
holes in data better.

util/stats/barchart.py:
- move the options for BarChart to a base class ChartOptions so
they can be more easily set and copied.
- add an option to set the chart size (so you can adjust the aspect ratio)
- don't do the add_subplot thing, use add_axes directly so we can
affect the size of the figure itself to make room for the legend
- make the initial array bottom floating point so we don't lose precision
- add an option to set the limits on the y axis
- use a figure legend instead of an axes legend so we can put the legend
outside of the actual chart. Also add an option to set the fontsize of
the legend.
- initial hack at outputting csv files
util/stats/db.py:
don't print out an error when the run is missing from the database
just return None, the error will be print elsewhere.
util/stats/output.py:
- make StatOutput derive from ChartOptions so that it's easier to
set default chart options.
- make the various output functions (graph, display, etc.) take the
name of the data as a parameter instead of making it a parameter to
__init__. This allows me to create the StatOutput object with
generic parameters while still being able to specialize the name
after the fact
- add support for graph_group and graph_bars to be applied to multiple
configuration groups. This results in a cross product of the groups
to be generated and used.
- flush the html file output as we go so that we can load the file
while graphs are still being generated.
- make the proxy a parameter to the graph function so the proper system's
data can be graphed
- for any groups or bars that are completely missing, remove them from
the graph. This way, if we decide not to do a set of runs, there won't
be holes in the data.
- output eps and ps by default in addition to the png.
util/stats/profile.py:
- clean up the data structures that are used to store the function
profile information and try our best to avoid keeping extra data
around that isn't used.
- make get() return None if a job is missing so we know it was
missing rather than the all zeroes thing.
- make the function profile categorization stuff total up to 100%
- Fixup the x-axis and y-axis labels.
- fix the dot file output stuff.
util/stats/stats.py:
support the new options stuff for StatOutput
H A Ddb.pydiff 2006:3ca085495c69 Tue Nov 22 21:50:00 EST 2005 Nathan Binkert <binkertn@umich.edu> Major improvements in the graph output code. Mostly adding more
options, making existing options more visible and dealing with
holes in data better.

util/stats/barchart.py:
- move the options for BarChart to a base class ChartOptions so
they can be more easily set and copied.
- add an option to set the chart size (so you can adjust the aspect ratio)
- don't do the add_subplot thing, use add_axes directly so we can
affect the size of the figure itself to make room for the legend
- make the initial array bottom floating point so we don't lose precision
- add an option to set the limits on the y axis
- use a figure legend instead of an axes legend so we can put the legend
outside of the actual chart. Also add an option to set the fontsize of
the legend.
- initial hack at outputting csv files
util/stats/db.py:
don't print out an error when the run is missing from the database
just return None, the error will be print elsewhere.
util/stats/output.py:
- make StatOutput derive from ChartOptions so that it's easier to
set default chart options.
- make the various output functions (graph, display, etc.) take the
name of the data as a parameter instead of making it a parameter to
__init__. This allows me to create the StatOutput object with
generic parameters while still being able to specialize the name
after the fact
- add support for graph_group and graph_bars to be applied to multiple
configuration groups. This results in a cross product of the groups
to be generated and used.
- flush the html file output as we go so that we can load the file
while graphs are still being generated.
- make the proxy a parameter to the graph function so the proper system's
data can be graphed
- for any groups or bars that are completely missing, remove them from
the graph. This way, if we decide not to do a set of runs, there won't
be holes in the data.
- output eps and ps by default in addition to the png.
util/stats/profile.py:
- clean up the data structures that are used to store the function
profile information and try our best to avoid keeping extra data
around that isn't used.
- make get() return None if a job is missing so we know it was
missing rather than the all zeroes thing.
- make the function profile categorization stuff total up to 100%
- Fixup the x-axis and y-axis labels.
- fix the dot file output stuff.
util/stats/stats.py:
support the new options stuff for StatOutput
H A Dstats.pydiff 2006:3ca085495c69 Tue Nov 22 21:50:00 EST 2005 Nathan Binkert <binkertn@umich.edu> Major improvements in the graph output code. Mostly adding more
options, making existing options more visible and dealing with
holes in data better.

util/stats/barchart.py:
- move the options for BarChart to a base class ChartOptions so
they can be more easily set and copied.
- add an option to set the chart size (so you can adjust the aspect ratio)
- don't do the add_subplot thing, use add_axes directly so we can
affect the size of the figure itself to make room for the legend
- make the initial array bottom floating point so we don't lose precision
- add an option to set the limits on the y axis
- use a figure legend instead of an axes legend so we can put the legend
outside of the actual chart. Also add an option to set the fontsize of
the legend.
- initial hack at outputting csv files
util/stats/db.py:
don't print out an error when the run is missing from the database
just return None, the error will be print elsewhere.
util/stats/output.py:
- make StatOutput derive from ChartOptions so that it's easier to
set default chart options.
- make the various output functions (graph, display, etc.) take the
name of the data as a parameter instead of making it a parameter to
__init__. This allows me to create the StatOutput object with
generic parameters while still being able to specialize the name
after the fact
- add support for graph_group and graph_bars to be applied to multiple
configuration groups. This results in a cross product of the groups
to be generated and used.
- flush the html file output as we go so that we can load the file
while graphs are still being generated.
- make the proxy a parameter to the graph function so the proper system's
data can be graphed
- for any groups or bars that are completely missing, remove them from
the graph. This way, if we decide not to do a set of runs, there won't
be holes in the data.
- output eps and ps by default in addition to the png.
util/stats/profile.py:
- clean up the data structures that are used to store the function
profile information and try our best to avoid keeping extra data
around that isn't used.
- make get() return None if a job is missing so we know it was
missing rather than the all zeroes thing.
- make the function profile categorization stuff total up to 100%
- Fixup the x-axis and y-axis labels.
- fix the dot file output stuff.
util/stats/stats.py:
support the new options stuff for StatOutput
/gem5/src/mem/cache/
H A Dqueue_entry.hhdiff 13859:4156ac0c7257 Wed Jan 30 08:46:00 EST 2019 Daniel R. Carvalho <odanrc@yahoo.com.br> mem-cache: Move Target to QueueEntry

WriteQueueEntry's target has 100% functionality overlap with MSHR's,
therefore make it base to MSHR::Target.

Change-Id: I48614e78179d708bd91bbe75a752e5a05146e8eb
Signed-off-by: Daniel R. Carvalho <odanrc@yahoo.com.br>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/17534
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com>
Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
H A Dwrite_queue_entry.hhdiff 13859:4156ac0c7257 Wed Jan 30 08:46:00 EST 2019 Daniel R. Carvalho <odanrc@yahoo.com.br> mem-cache: Move Target to QueueEntry

WriteQueueEntry's target has 100% functionality overlap with MSHR's,
therefore make it base to MSHR::Target.

Change-Id: I48614e78179d708bd91bbe75a752e5a05146e8eb
Signed-off-by: Daniel R. Carvalho <odanrc@yahoo.com.br>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/17534
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com>
Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
H A Dnoncoherent_cache.ccdiff 13859:4156ac0c7257 Wed Jan 30 08:46:00 EST 2019 Daniel R. Carvalho <odanrc@yahoo.com.br> mem-cache: Move Target to QueueEntry

WriteQueueEntry's target has 100% functionality overlap with MSHR's,
therefore make it base to MSHR::Target.

Change-Id: I48614e78179d708bd91bbe75a752e5a05146e8eb
Signed-off-by: Daniel R. Carvalho <odanrc@yahoo.com.br>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/17534
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com>
Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
H A Dmshr.hhdiff 13859:4156ac0c7257 Wed Jan 30 08:46:00 EST 2019 Daniel R. Carvalho <odanrc@yahoo.com.br> mem-cache: Move Target to QueueEntry

WriteQueueEntry's target has 100% functionality overlap with MSHR's,
therefore make it base to MSHR::Target.

Change-Id: I48614e78179d708bd91bbe75a752e5a05146e8eb
Signed-off-by: Daniel R. Carvalho <odanrc@yahoo.com.br>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/17534
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com>
Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
/gem5/src/mem/cache/replacement_policies/
H A Dbrrip_rp.hhdiff 13849:858526a875ab Tue Apr 09 10:26:00 EDT 2019 Anis Peysieux <anis.peysieux@inria.fr> mem-cache: Fix RRPV for RRIP

The RRPV values for RRIP and NRU replacment policies.
Long re-rereference interval was used instead of
distant re-rereference interval and vice-versa.
The btp value permit to choose beetwen distant and
long insertion ratio. A btp value of 0 force the
policy to always insert at a distant re-reference
interval and a btp value of 100 force the policy to
always insert at a long (intermediate) re-rereference
interval.

Change-Id: I516098f73942b769dcc31fe0edfe07c3e9c3effd
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/17851
Reviewed-by: Daniel Carvalho <odanrc@yahoo.com.br>
Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com>
Maintainer: Jason Lowe-Power <jason@lowepower.com>
Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
H A DReplacementPolicies.pydiff 13849:858526a875ab Tue Apr 09 10:26:00 EDT 2019 Anis Peysieux <anis.peysieux@inria.fr> mem-cache: Fix RRPV for RRIP

The RRPV values for RRIP and NRU replacment policies.
Long re-rereference interval was used instead of
distant re-rereference interval and vice-versa.
The btp value permit to choose beetwen distant and
long insertion ratio. A btp value of 0 force the
policy to always insert at a distant re-reference
interval and a btp value of 100 force the policy to
always insert at a long (intermediate) re-rereference
interval.

Change-Id: I516098f73942b769dcc31fe0edfe07c3e9c3effd
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/17851
Reviewed-by: Daniel Carvalho <odanrc@yahoo.com.br>
Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com>
Maintainer: Jason Lowe-Power <jason@lowepower.com>
Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
/gem5/src/mem/cache/tags/
H A Dcompressed_tags.hhdiff 13946:8e96e9be7f2c Tue Jun 19 11:31:00 EDT 2018 Daniel R. Carvalho <odanrc@yahoo.com.br> mem-cache: Add co-allocation function to compressed tags

Implement a co-allocation function in compressed tags, so
that compressed blocks can be co-allocated in a superblock.
Co-allocation is possible when compression ratio (CR) blocks
that share a superblock tag can be compressed to up to (100/CR)%
of their size.

Change-Id: I937cc1fcbb488e70309cb5478c12db65f1b4b23f
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/11411
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com>
Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
H A Dcompressed_tags.ccdiff 13946:8e96e9be7f2c Tue Jun 19 11:31:00 EDT 2018 Daniel R. Carvalho <odanrc@yahoo.com.br> mem-cache: Add co-allocation function to compressed tags

Implement a co-allocation function in compressed tags, so
that compressed blocks can be co-allocated in a superblock.
Co-allocation is possible when compression ratio (CR) blocks
that share a superblock tag can be compressed to up to (100/CR)%
of their size.

Change-Id: I937cc1fcbb488e70309cb5478c12db65f1b4b23f
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/11411
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Nikos Nikoleris <nikos.nikoleris@arm.com>
Maintainer: Nikos Nikoleris <nikos.nikoleris@arm.com>
/gem5/src/dev/arm/
H A Drv_ctrl.ccdiff 8273:d3992e7ebc59 Wed May 04 21:38:00 EDT 2011 Chris Emmons <chris.emmons@arm.com> RealView: Fix the 24 and 100MHz clocks which were providing incorrect values.
diff 8060:a9e16f89f11e Wed Feb 23 16:10:00 EST 2011 Ali Saidi <Ali.Saidi@ARM.com> ARM: Add support for read of 100MHz clock in system controller.
/gem5/configs/dram/
H A Dsweep.pydiff 10392:0100f00a229e Sat Sep 20 17:17:00 EDT 2014 Wendy Elsasser <wendy.elsasser@arm.com> cpu: Update DRAM traffic gen

Add new DRAM_ROTATE mode to traffic generator.
This mode will generate DRAM traffic that rotates across
banks per rank, command types, and ranks per channel

The looping order is illustrated below:
for (ranks per channel)
for (command types)
for (banks per rank)
// Generate DRAM Command Series

This patch also adds the read percentage as an input argument to the
DRAM sweep script. If the simulated read percentage is 0 or 100, the
middle for loop does not generate additional commands. This loop is
used only when the read percentage is set to 50, in which case the
middle loop will toggle between read and write commands.

Modified sweep.py script, which generates DRAM traffic.
Added input arguments and support for new DRAM_ROTATE mode.
The script now has input arguments for:
1) Read percentage
2) Number of ranks
3) Address mapping
4) Traffic generator mode (DRAM or DRAM_ROTATE)

The default values are:
100% reads, 1 rank, RoRaBaCoCh address mapping, and DRAM traffic gen mode

For the DRAM traffic mode, added multi-rank support.
diff 10392:0100f00a229e Sat Sep 20 17:17:00 EDT 2014 Wendy Elsasser <wendy.elsasser@arm.com> cpu: Update DRAM traffic gen

Add new DRAM_ROTATE mode to traffic generator.
This mode will generate DRAM traffic that rotates across
banks per rank, command types, and ranks per channel

The looping order is illustrated below:
for (ranks per channel)
for (command types)
for (banks per rank)
// Generate DRAM Command Series

This patch also adds the read percentage as an input argument to the
DRAM sweep script. If the simulated read percentage is 0 or 100, the
middle for loop does not generate additional commands. This loop is
used only when the read percentage is set to 50, in which case the
middle loop will toggle between read and write commands.

Modified sweep.py script, which generates DRAM traffic.
Added input arguments and support for new DRAM_ROTATE mode.
The script now has input arguments for:
1) Read percentage
2) Number of ranks
3) Address mapping
4) Traffic generator mode (DRAM or DRAM_ROTATE)

The default values are:
100% reads, 1 rank, RoRaBaCoCh address mapping, and DRAM traffic gen mode

For the DRAM traffic mode, added multi-rank support.
/gem5/src/mem/
H A DSimpleMemory.pydiff 9823:c8dd3368c6ba Mon Aug 19 03:52:00 EDT 2013 Andreas Hansson <andreas.hansson@arm.com> mem: Add an internal packet queue in SimpleMemory

This patch adds a packet queue in SimpleMemory to avoid using the
packet queue in the port (and thus have no involvement in the flow
control). The port queue was bound to 100 packets, and as the
SimpleMemory is modelling both a controller and an actual RAM, it
potentially has a large number of packets in flight. There is
currently no limit on the number of packets in the memory controller,
but this could easily be added in a follow-on patch.

As a result of the added internal storage, the functional access and
draining is updated. Some minor cleaning up and renaming has also been
done.

The memtest regression changes as a result of this patch and the stats
will be updated.
H A Dpacket_queue.ccdiff 11207:7b7e352f8d7f Mon Jul 20 10:15:00 EDT 2015 Brad Beckmann <Brad.Beckmann@amd.com> mem: add boolean to disable PacketQueue's size sanity check

the sanity check, while generally useful for exposing memory system bugs,
may be spurious with respect to GPU workloads, which may generate many more
requests than typical CPU workloads. the large number of requests generated
by the GPU may cause the req/resp queues to back up, thus queueing more than
100 packets.
diff 9390:5490105626dc Mon Jan 07 13:05:00 EST 2013 Andreas Hansson <andreas.hansson@arm.com> mem: Add sanity check to packet queue size

This patch adds a basic check to ensure that the packet queue does not
grow absurdly large. The queue should only be used to store packets
that were delayed due to blocking from the neighbouring port, and not
for actual storage. Thus, a limit of 100 has been chosen for now
(which is already quite substantial).
H A Dsimple_mem.hhdiff 9823:c8dd3368c6ba Mon Aug 19 03:52:00 EDT 2013 Andreas Hansson <andreas.hansson@arm.com> mem: Add an internal packet queue in SimpleMemory

This patch adds a packet queue in SimpleMemory to avoid using the
packet queue in the port (and thus have no involvement in the flow
control). The port queue was bound to 100 packets, and as the
SimpleMemory is modelling both a controller and an actual RAM, it
potentially has a large number of packets in flight. There is
currently no limit on the number of packets in the memory controller,
but this could easily be added in a follow-on patch.

As a result of the added internal storage, the functional access and
draining is updated. Some minor cleaning up and renaming has also been
done.

The memtest regression changes as a result of this patch and the stats
will be updated.
H A Dpacket_queue.hhdiff 11207:7b7e352f8d7f Mon Jul 20 10:15:00 EDT 2015 Brad Beckmann <Brad.Beckmann@amd.com> mem: add boolean to disable PacketQueue's size sanity check

the sanity check, while generally useful for exposing memory system bugs,
may be spurious with respect to GPU workloads, which may generate many more
requests than typical CPU workloads. the large number of requests generated
by the GPU may cause the req/resp queues to back up, thus queueing more than
100 packets.
H A Dsimple_mem.ccdiff 9823:c8dd3368c6ba Mon Aug 19 03:52:00 EDT 2013 Andreas Hansson <andreas.hansson@arm.com> mem: Add an internal packet queue in SimpleMemory

This patch adds a packet queue in SimpleMemory to avoid using the
packet queue in the port (and thus have no involvement in the flow
control). The port queue was bound to 100 packets, and as the
SimpleMemory is modelling both a controller and an actual RAM, it
potentially has a large number of packets in flight. There is
currently no limit on the number of packets in the memory controller,
but this could easily be added in a follow-on patch.

As a result of the added internal storage, the functional access and
draining is updated. Some minor cleaning up and renaming has also been
done.

The memtest regression changes as a result of this patch and the stats
will be updated.
/gem5/src/cpu/testers/traffic_gen/
H A Dtraffic_gen.ccdiff 10392:0100f00a229e Sat Sep 20 17:17:00 EDT 2014 Wendy Elsasser <wendy.elsasser@arm.com> cpu: Update DRAM traffic gen

Add new DRAM_ROTATE mode to traffic generator.
This mode will generate DRAM traffic that rotates across
banks per rank, command types, and ranks per channel

The looping order is illustrated below:
for (ranks per channel)
for (command types)
for (banks per rank)
// Generate DRAM Command Series

This patch also adds the read percentage as an input argument to the
DRAM sweep script. If the simulated read percentage is 0 or 100, the
middle for loop does not generate additional commands. This loop is
used only when the read percentage is set to 50, in which case the
middle loop will toggle between read and write commands.

Modified sweep.py script, which generates DRAM traffic.
Added input arguments and support for new DRAM_ROTATE mode.
The script now has input arguments for:
1) Read percentage
2) Number of ranks
3) Address mapping
4) Traffic generator mode (DRAM or DRAM_ROTATE)

The default values are:
100% reads, 1 rank, RoRaBaCoCh address mapping, and DRAM traffic gen mode

For the DRAM traffic mode, added multi-rank support.
diff 10392:0100f00a229e Sat Sep 20 17:17:00 EDT 2014 Wendy Elsasser <wendy.elsasser@arm.com> cpu: Update DRAM traffic gen

Add new DRAM_ROTATE mode to traffic generator.
This mode will generate DRAM traffic that rotates across
banks per rank, command types, and ranks per channel

The looping order is illustrated below:
for (ranks per channel)
for (command types)
for (banks per rank)
// Generate DRAM Command Series

This patch also adds the read percentage as an input argument to the
DRAM sweep script. If the simulated read percentage is 0 or 100, the
middle for loop does not generate additional commands. This loop is
used only when the read percentage is set to 50, in which case the
middle loop will toggle between read and write commands.

Modified sweep.py script, which generates DRAM traffic.
Added input arguments and support for new DRAM_ROTATE mode.
The script now has input arguments for:
1) Read percentage
2) Number of ranks
3) Address mapping
4) Traffic generator mode (DRAM or DRAM_ROTATE)

The default values are:
100% reads, 1 rank, RoRaBaCoCh address mapping, and DRAM traffic gen mode

For the DRAM traffic mode, added multi-rank support.
diff 9391:8f24dcb13b85 Mon Jan 07 13:05:00 EST 2013 Andreas Hansson <andreas.hansson@arm.com> cpu: Fix the traffic gen read percentage

This patch fixes the computation that determines whether to perform a
read or a write such that the two corner cases (0 and 100) are both
more efficient and handled correctly.
/gem5/src/arch/sparc/
H A Dfaults.ccdiff 11850:36119fa7874d Fri Feb 17 00:01:00 EST 2017 Brandon Potter <brandon.potter@amd.com> sparc: fix bugs caused by cd7f3a1dbf55

Turns out that SPARC SE mode relied on M5_pid being "0" in
all cases. The entries in the SPARC TLBs are accessed with
M5_pid as their context. This is buggy in the sense that it
will never work with more than one process or any
initialization that doesn't have the M5_pid value passed in
as "0".

cd7f3a1dbf55 broke the SPARC build because it deletes M5_pid
and uses a _pid with a default of "100" instead. This caused
the SPARC TLB to never return any valid lookups for any
request; the program never moved past the first instruction
with SPARC SE in the regression tester.

The solution proposed in this changeset is to initialize
the address space identification register with the PID value
that is passed into the process class as a parameter from
Python. This should return the correct responses from the TLB
since the insertions and lookups into the page table will be
using the same PID.

Furthermore, there are corner cases in the code which elevate
privileges and revert to using context "0" as the context in
the TLB. I believe that these are related to kernel level
traps and hypervisor privilege escalations, but I'm not
completely sure. I've tried to address the corner cases
properly, but it would be beneficial to have someone who is
familiar with the SPARC architecture to take a look at this
fix.

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