read_image is not defined for me, nor is readimg_jqtide_.
Henry Rich
On 5/10/2022 8:13 PM, Devon McCormick wrote:
It's the "read_image_" line that seems to be where it hangs up for me, on
the fourth line from the end with the comment "¡Fails here!".
The invocation (for 5 threads) is:
mtFileWork t. '' MUTEX [ mtFileWork t. '' MUTEX [ mtFileWork t. '' MUTEX [
mtFileWork t. '' MUTEX [ mtFileWork t. '' MUTEX
On Tue, May 10, 2022 at 6:22 PM Henry Rich <henryhr...@gmail.com> wrote:
What do I run to make it fail?
Henry Rich
On 5/10/2022 6:01 PM, Devon McCormick wrote:
Henry,
Here is the MVF - minimum viable failure. It looks like the culprit is
"read_image" which is just a cover for "readimg_jqtide_". I'm running
under jconsole.
Set up in a directory with some .JPG files:
FLS=: 0{"1 dir '*.jpg'
createThreads 5
MUTEX=: 10 T. 1 NB. Recursive mutex; either fails.
mtFileWork=: 3 : 0
tm=. 6!:1''
while. 0<#FLS do.
tn=. ":3 T. '' NB. Thread number as char
varnm=. ' '-.~'threadVar',tn
smoutput 'Thread ',tn,' locking at ',":qts''
11 T. y
smoutput 'Thread ',tn,' locked at ',":qts''
(varnm,' FLS')=: split FLS
smoutput 'Thread ',tn,' unlocking at ',(":qts''),' for file
',flnm=.
".varnm
13 T. y
smoutput 'Thread ',tn,' unlocked at ',":qts''
#read_image flnm NB. ¡Fails here!
end.
tm=. tm,~6!:1''
NB.EG mtFileWork t. '' MUTEX [ mtFileWork t. '' MUTEX [ mtFileWork t. ''
MUTEX [ mtFileWork t. '' MUTEX [ mtFileWork t. '' MUTEX
)
Any help is appreciated!
Thanks,
Devon
On Tue, May 10, 2022 at 4:46 PM Henry Rich <henryhr...@gmail.com> wrote:
If you can get me a version that fails on Windows I'll look at it.
Henry Rich
On 5/10/2022 4:20 PM, Devon McCormick wrote:
Hi,
Has anyone had success using the multi-threading mutex primitives?
I've
had limited success - I'll be presenting some basic routines at NYCJUG
this
evening (18:00 EDT -
https://www.meetup.com/J-Dynamic-Functional-Programming/) - but have
been
unable to run multiple threads on a real-life process without crashing
J.
The following simplified demo seems to work OK but the version of this
where I do actual work crashes - with "Process shell<1> exited
abnormally
with code 5" - after two to thirty repetitions.
MUTEX=: 10 T. 0 NB. Fast mutex
createThreads=: 3 : '{{ 0 T. '''' }} ^:y]'''''
qts=: 6!:0
createThreads 5
GVAR=: 100?@$1e6 NB. Initialize global threads
will
consume
multiLockMsgUnlock=: 3 : 0
while. 0<#GVAR do.
tn=. ":3 T. '' NB. Thread number as char
varnm=: ' '-.~'threadVar',tn
smoutput 'Thread ',tn,' locking at ',":qts''
11 T. y
smoutput 'Thread ',tn,' locked at ',":qts''
(varnm,' GVAR')=: split GVAR
smoutput 'Thread ',tn,' unlocking at ',(":qts''),' with
',tn,'=',":".varnm
13 T. y
smoutput 'Thread ',tn,' unlocked at ',(":qts''),';
#GVAR=',":#GVAR
end.
)
NB. Start five processes (one line):
multiLockMsgUnlock t. '' MUTEX [ multiLockMsgUnlock t. '' MUTEX [
multiLockMsgUnlock t. '' MUTEX [ multiLockMsgUnlock t. '' MUTEX [
multiLockMsgUnlock t. '' MUTEX
The actual work I'm doing is on files, a list of whose names
corresponds
to
the GVAR vector above.
Any suggestions are welcome.
Cheers,
Devon
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