== sanity test 255a: check 'lfs ladvise -a willread' ===== 12:52:38 (1781283158)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 2.54849 s, 41.1 MB/s
ladvise: range [2, 1] is invalid
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

ladvise: range [2, 2] is invalid
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

ladvise: conflicting arguments of -l and -e
Provide servers with advice about access patterns for a file.
usage: ladvise [--advice|-a ADVICE] [--start|-s START[kMGT]]
               [--background|-b] [--unset|-u]

               {--end|-e END[kMGT]|--length|-l LENGTH[kMGT]}
               {[--mode|-m [READ,WRITE]}
               <file> ...

Synchronous ladvise should wait
fail_val=4
fail_loc=0x237
Asynchronous ladvise shouldn't wait
fail_loc=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.685548
Iter 1/10: OSS cache speed: 0.843221
Iter 1/10: ladvise speed: 0.669011
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.792708
Iter 2/10: OSS cache speed: 0.677109
Iter 2/10: ladvise speed: 0.761482
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.750116
Iter 3/10: OSS cache speed: 0.775427
Iter 3/10: ladvise speed: 0.645208
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.749753
Iter 4/10: OSS cache speed: 0.601445
Iter 4/10: ladvise speed: 0.643519
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.64975
Iter 5/10: OSS cache speed: 0.745067
Iter 5/10: ladvise speed: 0.818883
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.734303
Iter 6/10: OSS cache speed: 0.712141
Iter 6/10: ladvise speed: 0.759595
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.796433
Iter 7/10: OSS cache speed: 0.679982
Iter 7/10: ladvise speed: 0.888373
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.687791
Iter 8/10: OSS cache speed: 0.782992
Iter 8/10: ladvise speed: 0.7749
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.747839
Iter 9/10: OSS cache speed: 0.755699
Iter 9/10: ladvise speed: 0.703853
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.739942
Iter 10/10: OSS cache speed: 0.715969
Iter 10/10: ladvise speed: 0.550759
Average uncached read: .73
Average speedup with OSS cached read:  .72 = +-1.36%
Average speedup with ladvise willread:  .72 = +-1.36%
/home/green/git/lustre-release/lustre/tests/sanity.sh: line 21886: šE
yU: < 20 : syntax error: operand expected (error token is "< 20 ")
lfs ladvise: cannot give advice: Unknown error 524 (524)
ladvise: cannot give advice 'dontneed' to file '/mnt/lustre/f255a.sanity': Unknown error 524
osd-zfs does not support dontneed or drop_caches