Error while computing Gamma-ray pulsar search #3 v1.11 (FGRPopencl-ati)

I believe I have SOLVED my problem with Gamma-ray pulsar search #3 v1.11 (FGRPopencl-ati) on Linux (Fedora Core 20) giving a computation error after about 15 seconds. It used to fail thus ...

7.2.42

process exited with code 65 (0x41, -191)

22:52:32 (22507): [normal]: This Einstein@home App was built at: Feb 18 2014 15:42:42

22:52:32 (22507): [normal]: Start of BOINC application '../../projects/einstein.phys.uwm.edu/hsgamma_FGRP3_1.11_x86_64-pc-linux-gnu__FGRPopencl-ati'.
command line: ../../projects/einstein.phys.uwm.edu/hsgamma_FGRP3_1.11_x86_64-pc-linux-gnu__FGRPopencl-ati --inputfile ../../projects/einstein.phys.uwm.edu/LATeah0092C.dat --outputfile results.cand.out --alpha 1.85606135223 --delta -0.187105282293 --pcutfu 0.06251659 --skyRadius 1.402826e-02 --f0start 32 --f0Band 64 --firstSkyPoint 114840 --numSkyPoints 99 --f1dot -3.37e-10 --f1dotBand 1e-12 --df1dot 8.207629151e-15 --ephemdir ../../projects/einstein.phys.uwm.edu/JPLEPH --Tcoh 524288.0 --toplist 5 --cohFollow 1 --numCells 1 --useWeights 1 --Srefinement 1 --CohSkyRef 1 --cohfullskybox 1 --interbinning 2 --useDiriWin 10 --mmfu 0.15 --reftime 55471 --debug 1 --device 0
output files: 'results.cand.out' '../../projects/einstein.phys.uwm.edu/LATeah0092C_96.0_114840_-3.36e-10_2_0' 'results.cand.out.cohfu' '../../projects/einstein.phys.uwm.edu/LATeah0092C_96.0_114840_-3.36e-10_2_1'
22:52:32 (22507): [debug]: Flags: X64 SSE SSE2 GNUC X86 GNUX86
22:52:32 (22507): [debug]: glibc version/release: 2.18/stable
22:52:32 (22507): [debug]: Set up communication with graphics process.
boinc_get_opencl_ids returned [0xb45480 , 0x7f49891f8380]
Using OpenCL platform provided by: Advanced Micro Devices, Inc.
Using OpenCL device "Juniper" by: Advanced Micro Devices, Inc.
Max allocation limit: 134217728
% Opening inputfile: ../../projects/einstein.phys.uwm.edu/LATeah0092C.dat
% Total amount of photon times: 10000
% Preparing toplist of length: 5
read_checkpoint(): Couldn't open file 'results.cand.out.cpt': No such file or directory (2)
% fft_size: 33554432 (0x2000000)
% Sky point 1/99
% Creating FFT plan.
Error allocating device memory: 268435456 bytes (error: -61)
22:52:33 (22507): [CRITICAL]: ERROR: MAIN() returned with error '1'
FPU status flags:
mv: cannot stat âresults.cand.outâ: No such file or directory
mv: cannot stat âresults.cand.outâ: No such file or directory
mv: cannot stat âresults.cand.outâ: No such file or directory
mv: cannot stat âresults.cand.outâ: No such file or directory
mv: cannot stat âresults.cand.outâ: No such file or directory
mv: cannot stat âresults.cand.out.cohfuâ: No such file or directory
mv: cannot stat âresults.cand.out.cohfuâ: No such file or directory
mv: cannot stat âresults.cand.out.cohfuâ: No such file or directory
mv: cannot stat âresults.cand.out.cohfuâ: No such file or directory
mv: cannot stat âresults.cand.out.cohfuâ: No such file or directory
mv: cannot stat âresults.cand.out.cohfuâ: No such file or directory
mv: cannot stat âresults.cand.out.cohfuâ: No such file or directory
22:52:45 (22507): [normal]: done. calling boinc_finish(65).
22:52:45 (22507): called boinc_finish

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My current environment is this (from boinc.log) ...

23-Jun-2014 08:42:34 [---] Starting BOINC client version 7.2.42 for x86_64-pc-linux-gnu
23-Jun-2014 08:42:34 [---] log flags: file_xfer, sched_ops, task
23-Jun-2014 08:42:34 [---] Libraries: libcurl/7.32.0 NSS/3.16.1 Basic ECC zlib/1.2.8 libidn/1.28 libssh2/1.4.3
23-Jun-2014 08:42:34 [---] Data directory: /var/lib/boinc
23-Jun-2014 08:42:34 [---] CAL: ATI GPU 0: ATI Radeon HD 5700/6750/6770 series (Juniper) (CAL version 1.4.1848, 1024MB, 970MB available, 50 GFLOPS peak)
23-Jun-2014 08:42:34 [---] OpenCL: AMD/ATI GPU 0: ATI Radeon HD 5700/6750/6770 series (Juniper) (driver version 1348.5, device version OpenCL 1.2 AMD-APP (1348.5), 1024MB, 970MB available, 50 GFLOPS peak)
23-Jun-2014 08:42:34 [---] OpenCL CPU: AMD Athlon(tm) II X4 635 Processor (OpenCL driver vendor: Advanced Micro Devices, Inc., driver version 1348.5 (sse2), device version OpenCL 1.2 AMD-APP (1348.5))
23-Jun-2014 08:42:34 [---] Host name: xxxxxx
23-Jun-2014 08:42:34 [---] Processor: 4 AuthenticAMD AMD Athlon(tm) II X4 635 Processor [Family 16 Model 5 Stepping 2]
23-Jun-2014 08:42:34 [---] Processor features: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm 3dnowext 3dnow constant_tsc rep_good nopl nonstop_tsc extd_apicid pni monitor cx16 popcnt lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw ibs skinit wdt hw_pstate npt lbrv svm_lock nrip_save
23-Jun-2014 08:42:34 [---] OS: Linux: 3.14.4-200.fc20.x86_64
23-Jun-2014 08:42:34 [---] Memory: 3.86 GB physical, 3.89 GB virtual
23-Jun-2014 08:42:34 [---] Disk: 241.34 GB total, 73.18 GB free
23-Jun-2014 08:42:34 [---] Local time is UTC +1 hours

The solution for me was to amend /usr/lib/systemd/system/boinc-client.service to include the line...

Environment="GPU_MAX_HEAP_SIZE=100"

The contents of that entire file now reads ...

[Unit]
Description=Berkeley Open Infrastructure Network Computing Client
After=network.target

[Service]
Nice=10
User=boinc
PermissionsStartOnly=yes
ExecStartPre=/bin/sleep 1
Environment="GPU_MAX_HEAP_SIZE=100"
ExecStartPre=/usr/bin/touch /var/log/boinc.log /var/log/boincerr.log
ExecStartPre=/usr/bin/chown boinc:boinc /var/log/boinc.log /var/log/boincerr.log
ExecStart=/usr/bin/boinc --dir /var/lib/boinc
ExecReload=/usr/bin/boinccmd --read_cc_config
ExecStopPost=/bin/rm -f /var/lib/boinc/lockfile

[Install]
WantedBy=multi-user.target

My jobs now complete OK e.g.http://einsteinathome.org/task/442206217

I hope this is of use to someone.