* [PATCH OSSTEST] Allow longer timeout when creating backing file for a raw disk.
@ 2016-01-15 12:23 Ian Campbell
2016-01-15 16:42 ` Ian Jackson
0 siblings, 1 reply; 2+ messages in thread
From: Ian Campbell @ 2016-01-15 12:23 UTC (permalink / raw)
To: ian.jackson, xen-devel; +Cc: Ian Campbell
I noticed this dd timiung out when recommissioning the 3 cubietrucks
(picasso, metzinger, gleizes) but looking at the log shows this has
been happening on braque too.
The current code assumes 65MB/s arriving at a timeout of 153s for the
10G file. On arndale-* the logs indicate that it is achieving 95MB/s
and taking 105-107s which results in a warning but not a failure:
execution took 105 seconds [**>153.846153846154/2**]
In experiments on a local cubietruck I observed it achieving a much
lower throughput of 40MB/s, which seems to be consistent with what
others are seeing:
https://groups.google.com/forum/#!category-topic/cubieboard/troubleshooting/7R4HlCDNCTU
Therefore calculate the timeout assuming a throughput of 20MB/s, in
practice for a 10GB file this will result in a 500s timeout.
Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
---
Osstest/TestSupport.pm | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/Osstest/TestSupport.pm b/Osstest/TestSupport.pm
index 28ac572..962d773 100644
--- a/Osstest/TestSupport.pm
+++ b/Osstest/TestSupport.pm
@@ -1747,9 +1747,9 @@ sub make_qcow2 ($$$) {
}
sub make_raw ($$$) {
my ($ho, $gho, $disk_mb) = @_;
- # In local tests this reported 130MB/s, so calculate a timeout assuming 65MB/s.
+ # In local tests this reported 40MB/s, so calculate a timeout assuming 20MB/s.
target_cmd_root($ho, "dd if=/dev/zero of=$gho->{Rootimg} bs=1MB count=${disk_mb}",
- ${disk_mb} / 65);
+ ${disk_mb} / 20);
}
sub prepareguest_part_diskimg ($$$) {
--
2.6.1
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH OSSTEST] Allow longer timeout when creating backing file for a raw disk.
2016-01-15 12:23 [PATCH OSSTEST] Allow longer timeout when creating backing file for a raw disk Ian Campbell
@ 2016-01-15 16:42 ` Ian Jackson
0 siblings, 0 replies; 2+ messages in thread
From: Ian Jackson @ 2016-01-15 16:42 UTC (permalink / raw)
To: Ian Campbell; +Cc: xen-devel
Ian Campbell writes ("[PATCH OSSTEST] Allow longer timeout when creating backing file for a raw disk."):
> I noticed this dd timiung out when recommissioning the 3 cubietrucks
> (picasso, metzinger, gleizes) but looking at the log shows this has
> been happening on braque too.
>
> The current code assumes 65MB/s arriving at a timeout of 153s for the
> 10G file. On arndale-* the logs indicate that it is achieving 95MB/s
> and taking 105-107s which results in a warning but not a failure:
>
> execution took 105 seconds [**>153.846153846154/2**]
>
> In experiments on a local cubietruck I observed it achieving a much
> lower throughput of 40MB/s, which seems to be consistent with what
> others are seeing:
> https://groups.google.com/forum/#!category-topic/cubieboard/troubleshooting/7R4HlCDNCTU
>
> Therefore calculate the timeout assuming a throughput of 20MB/s, in
> practice for a 10GB file this will result in a 500s timeout.
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
^ permalink raw reply [flat|nested] 2+ messages in thread
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