Hi Steven,
(2012/08/22 22:51), Steven Rostedt wrote:
On Wed, 2012-08-22 at 17:43 +0900, Yoshihiro YUNOMAE wrote:
Add read path and control path to use trace-agent of virtio-trace.
When we use trace-agent, trace-cmd will be used as follows:
# AGENT_READ_DIR=/tmp/virtio-trace/tracing \
(2012/08/23 11:01), Masami Hiramatsu wrote:
> (2012/08/22 22:41), Steven Rostedt wrote:
>> On Wed, 2012-08-22 at 17:43 +0900, Yoshihiro YUNOMAE wrote:
>>> From: Masami Hiramatsu
>>>
>>> Count debugfs/tracing/per_cpu/cpu* to determine the
>>> number of CPUs.
>>
>> I'm curious, do you find that sysc
On Wed, Aug 22, 2012 at 12:33:17PM +0300, Michael S. Tsirkin wrote:
> Hmm, so this will busy wait which is unelegant.
> We need some event IMO.
No, it does not busy wait. leak_balloon() is mutual exclusive with migration
steps, so for the case we have one racing against the other, we really want
l
(2012/08/22 22:41), Steven Rostedt wrote:
> On Wed, 2012-08-22 at 17:43 +0900, Yoshihiro YUNOMAE wrote:
>> From: Masami Hiramatsu
>>
>> Count debugfs/tracing/per_cpu/cpu* to determine the
>> number of CPUs.
>
> I'm curious, do you find that sysconf doesn't return the # of CPUs the
> system has?
Il 22/08/2012 15:13, Stefan Hajnoczi ha scritto:
> http://lists.gnu.org/archive/html/qemu-devel/2010-12/msg01741.html
>
> "This is a real problem in practice. IE. the USB CD-ROM on this POWER7
> blade limits transfers to 0x1e000 bytes for example and the Linux "sr"
> driver on the guest is going t
On Wed, 2012-08-22 at 17:43 +0900, Yoshihiro YUNOMAE wrote:
> Add read path and control path to use trace-agent of virtio-trace.
> When we use trace-agent, trace-cmd will be used as follows:
> # AGENT_READ_DIR=/tmp/virtio-trace/tracing \
> AGENT_CTL=/tmp/virtio-trace/agent-ctl-path.in
On Wed, 2012-08-22 at 17:43 +0900, Yoshihiro YUNOMAE wrote:
> From: Masami Hiramatsu
>
> Count debugfs/tracing/per_cpu/cpu* to determine the
> number of CPUs.
I'm curious, do you find that sysconf doesn't return the # of CPUs the
system has? I've had boxes where the per_cpu/cpu* had more cpus th
On Wed, 2012-08-22 at 17:43 +0900, Yoshihiro YUNOMAE wrote:
> From: Masami Hiramatsu
>
> Use TRACE_DIR environment variable for setting
TRACING_DIR would be better, as we are searching for /debug/tracing and
not /debug/trace. Perhaps DEBUG_TRACING_DIR would be even better as to
be less of a gene
On Wed, Aug 22, 2012 at 02:09:28PM +0200, Paolo Bonzini wrote:
> Il 22/08/2012 13:04, Cong Meng ha scritto:
> >>
> >> Cong, what is the limit that the host HBA enforces (and what is the
> >> HBA)? What commands see a problem? Is it fixed by using scsi-block
> >> instead of scsi-generic (if you ca
Il 22/08/2012 13:04, Cong Meng ha scritto:
>>
>> Cong, what is the limit that the host HBA enforces (and what is the
>> HBA)? What commands see a problem? Is it fixed by using scsi-block
>> instead of scsi-generic (if you can use scsi-block at all, i.e. it's not
>> a tape or similar device)?
>>
>
On 08/21/2012 06:14 PM, Paolo Bonzini wrote:
Il 21/08/2012 11:52, Stefan Hajnoczi ha scritto:
Using /sys/dev/block or /sys/dev/char seems easier, and lets you
retrieve the parameters for block devices too.
what do you mean with "block devices"? Using "/dev/sda" instead of
"/dev/sg0"?
Yes
On Tue, Aug 21, 2012 at 10:19:31PM -0300, Rafael Aquini wrote:
> On Wed, Aug 22, 2012 at 03:07:41AM +0300, Michael S. Tsirkin wrote:
> > On Tue, Aug 21, 2012 at 05:45:56PM -0300, Rafael Aquini wrote:
> > > On Tue, Aug 21, 2012 at 10:30:31PM +0300, Michael S. Tsirkin wrote:
> > > > On Tue, Aug 21, 2
Use poll() for avoiding a busy loop to read trace data of a guest from FIFO.
Signed-off-by: Yoshihiro YUNOMAE
---
trace-recorder.c | 42 --
1 files changed, 36 insertions(+), 6 deletions(-)
diff --git a/trace-recorder.c b/trace-recorder.c
index 6577fe8
Add non-blocking option for open() and splice_read() for avoiding block to read
trace data of a guest from FIFO.
If SIGINT comes to read/write processes from the parent process in the case
where FIFO as a read I/F is assigned, then reading is normally blocked for
splice_read(). So, we added nonblo
Add read path and control path to use trace-agent of virtio-trace.
When we use trace-agent, trace-cmd will be used as follows:
# AGENT_READ_DIR=/tmp/virtio-trace/tracing \
AGENT_CTL=/tmp/virtio-trace/agent-ctl-path.in \
TRACING_DIR=/tmp/virtio-trace/debugfs/tracing \
From: Masami Hiramatsu
Count debugfs/tracing/per_cpu/cpu* to determine the
number of CPUs.
Signed-off-by: Masami Hiramatsu
Signed-off-by: Yoshihiro YUNOMAE
---
trace-record.c | 41 +
1 files changed, 41 insertions(+), 0 deletions(-)
diff --git a/tra
From: Masami Hiramatsu
Use TRACE_DIR environment variable for setting
debugfs/tracing directory if defined. This is
for controlling guest(or remote) ftrace.
Signed-off-by: Masami Hiramatsu
Signed-off-by: Yoshihiro YUNOMAE
---
trace-util.c |9 +
1 files changed, 9 insertions(+), 0
Hi Steven,
The following patch set provides a feature which can read trace data of a guest
using virtio-trace (https://lkml.org/lkml/2012/8/9/210) for a recorder
function of trace-cmd. This patch set depends on the trace-agent running on a
guest in the virtio-trace system.
To translate raw data o
On Tue, Aug 21, 2012 at 7:31 PM, Blue Swirl wrote:
> On Tue, Aug 21, 2012 at 8:23 AM, Cong Meng wrote:
>> diff --git a/block_int.h b/block_int.h
>> index d72317f..a9d07a2 100644
>> --- a/block_int.h
>> +++ b/block_int.h
>> @@ -333,6 +333,10 @@ struct BlockDriverState {
>>
>> /* long-running
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