# HG changeset patch
# User Shriram Rajagopalan <rshriram@xxxxxxxxx>
# Date 1319049481 25200
# Node ID c043f91da30401c96c1e7aeca40645fc8afde5bb
# Parent 64d6b8a65a7ed4939fef93d44ea5199efc9c127a
remus: command line switch to enable/disable checkpoint compression
Add a command line switch to remus script that allows the user to
enable or disable checkpoint compression in the libxc code.
Signed-off-by: Shriram Rajagopalan <rshriram@xxxxxxxxx>
diff -r 64d6b8a65a7e -r c043f91da304
tools/python/xen/lowlevel/checkpoint/checkpoint.c
--- a/tools/python/xen/lowlevel/checkpoint/checkpoint.c Wed Oct 19 11:36:07
2011 -0700
+++ b/tools/python/xen/lowlevel/checkpoint/checkpoint.c Wed Oct 19 11:38:01
2011 -0700
@@ -104,13 +104,14 @@
PyObject* postcopy_cb = NULL;
PyObject* checkpoint_cb = NULL;
unsigned int interval = 0;
+ unsigned int flags = 0;
int fd;
struct save_callbacks callbacks;
int rc;
- if (!PyArg_ParseTuple(args, "O|OOOI", &iofile, &suspend_cb, &postcopy_cb,
- &checkpoint_cb, &interval))
+ if (!PyArg_ParseTuple(args, "O|OOOII", &iofile, &suspend_cb, &postcopy_cb,
+ &checkpoint_cb, &interval, &flags))
return NULL;
self->interval = interval;
@@ -160,7 +161,7 @@
callbacks.data = self;
self->threadstate = PyEval_SaveThread();
- rc = checkpoint_start(&self->cps, fd, &callbacks);
+ rc = checkpoint_start(&self->cps, fd, &callbacks, flags);
PyEval_RestoreThread(self->threadstate);
if (rc < 0) {
diff -r 64d6b8a65a7e -r c043f91da304
tools/python/xen/lowlevel/checkpoint/checkpoint.h
--- a/tools/python/xen/lowlevel/checkpoint/checkpoint.h Wed Oct 19 11:36:07
2011 -0700
+++ b/tools/python/xen/lowlevel/checkpoint/checkpoint.h Wed Oct 19 11:38:01
2011 -0700
@@ -40,13 +40,15 @@
timer_t timer;
} checkpoint_state;
+#define CHECKPOINT_FLAGS_COMPRESSION 1
char* checkpoint_error(checkpoint_state* s);
void checkpoint_init(checkpoint_state* s);
int checkpoint_open(checkpoint_state* s, unsigned int domid);
void checkpoint_close(checkpoint_state* s);
int checkpoint_start(checkpoint_state* s, int fd,
- struct save_callbacks* callbacks);
+ struct save_callbacks* callbacks,
+ unsigned int remus_flags);
int checkpoint_suspend(checkpoint_state* s);
int checkpoint_resume(checkpoint_state* s);
int checkpoint_postflush(checkpoint_state* s);
diff -r 64d6b8a65a7e -r c043f91da304
tools/python/xen/lowlevel/checkpoint/libcheckpoint.c
--- a/tools/python/xen/lowlevel/checkpoint/libcheckpoint.c Wed Oct 19
11:36:07 2011 -0700
+++ b/tools/python/xen/lowlevel/checkpoint/libcheckpoint.c Wed Oct 19
11:38:01 2011 -0700
@@ -170,7 +170,8 @@
}
int checkpoint_start(checkpoint_state* s, int fd,
- struct save_callbacks* callbacks)
+ struct save_callbacks* callbacks,
+ unsigned int remus_flags)
{
int hvm, rc;
int flags = XCFLAGS_LIVE;
@@ -188,6 +189,8 @@
if (switch_qemu_logdirty(s, 1))
return -1;
}
+ if (remus_flags & CHECKPOINT_FLAGS_COMPRESSION)
+ flags |= XCFLAGS_CHECKPOINT_COMPRESS;
callbacks->switch_qemu_logdirty = noop_switch_logdirty;
diff -r 64d6b8a65a7e -r c043f91da304 tools/python/xen/remus/save.py
--- a/tools/python/xen/remus/save.py Wed Oct 19 11:36:07 2011 -0700
+++ b/tools/python/xen/remus/save.py Wed Oct 19 11:38:01 2011 -0700
@@ -133,7 +133,7 @@
class Saver(object):
def __init__(self, domid, fd, suspendcb=None, resumecb=None,
- checkpointcb=None, interval=0):
+ checkpointcb=None, interval=0, flags=0):
"""Create a Saver object for taking guest checkpoints.
domid: name, number or UUID of a running domain
fd: a stream to which checkpoint data will be written.
@@ -141,12 +141,14 @@
resumecb: callback invoked before guest resumes
checkpointcb: callback invoked when a checkpoint is complete. Return
True to take another checkpoint, or False to stop.
+ flags: Remus flags to be passed to xc_domain_save
"""
self.fd = fd
self.suspendcb = suspendcb
self.resumecb = resumecb
self.checkpointcb = checkpointcb
self.interval = interval
+ self.flags = flags
self.vm = vm.VM(domid)
@@ -164,7 +166,8 @@
try:
self.checkpointer.open(self.vm.domid)
self.checkpointer.start(self.fd, self.suspendcb, self.resumecb,
- self.checkpointcb, self.interval)
+ self.checkpointcb, self.interval,
+ self.flags)
except xen.lowlevel.checkpoint.error, e:
raise CheckpointError(e)
finally:
diff -r 64d6b8a65a7e -r c043f91da304 tools/remus/remus
--- a/tools/remus/remus Wed Oct 19 11:36:07 2011 -0700
+++ b/tools/remus/remus Wed Oct 19 11:38:01 2011 -0700
@@ -16,6 +16,9 @@
class CfgException(Exception): pass
class Cfg(object):
+
+ REMUS_FLAGS_COMPRESSION = 1
+
def __init__(self):
# must be set
self.domid = 0
@@ -25,6 +28,7 @@
self.port = XendOptions.instance().get_xend_relocation_port()
self.interval = 200
self.netbuffer = True
+ self.flags = self.REMUS_FLAGS_COMPRESSION
self.timer = False
parser = optparse.OptionParser()
@@ -38,6 +42,8 @@
help='replicate to /dev/null (no disk checkpoints,
only memory & net buffering)')
parser.add_option('', '--no-net', dest='nonet', action='store_true',
help='run without net buffering (benchmark option)')
+ parser.add_option('', '--no-compression', dest='nocompress',
action='store_true',
+ help='run without checkpoint compression')
parser.add_option('', '--timer', dest='timer', action='store_true',
help='force pause at checkpoint interval
(experimental)')
self.parser = parser
@@ -56,6 +62,8 @@
self.nullremus = True
if opts.nonet:
self.netbuffer = False
+ if opts.nocompress:
+ self.flags &= ~self.REMUS_FLAGS_COMPRESSION
if opts.timer:
self.timer = True
@@ -190,7 +198,7 @@
rc = 0
checkpointer = save.Saver(cfg.domid, fd, postsuspend, preresume, commit,
- interval)
+ interval, cfg.flags)
try:
checkpointer.start()
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