== sanity test 255a: check 'lfs ladvise -a willread' ===== 09:35:37 (1761312937)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 1.32719 s, 79.0 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: 0.964936
Iter 1/10: OSS cache speed: 0.925242
Iter 1/10: ladvise speed: 0.937707
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.93291
Iter 2/10: OSS cache speed: 0.84987
Iter 2/10: ladvise speed: 1.00087
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.87065
Iter 3/10: OSS cache speed: 0.884668
Iter 3/10: ladvise speed: 0.842106
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.741654
Iter 4/10: OSS cache speed: 0.810807
Iter 4/10: ladvise speed: 0.905397
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.01119
Iter 5/10: OSS cache speed: 0.96743
Iter 5/10: ladvise speed: 0.988832
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.982239
Iter 6/10: OSS cache speed: 0.91776
Iter 6/10: ladvise speed: 0.916847
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.96748
Iter 7/10: OSS cache speed: 0.988701
Iter 7/10: ladvise speed: 0.78027
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.894557
Iter 8/10: OSS cache speed: 0.860363
Iter 8/10: ladvise speed: 0.844313
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.918626
Iter 9/10: OSS cache speed: 0.892687
Iter 9/10: ladvise speed: 0.852831
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.954055
Iter 10/10: OSS cache speed: 0.915132
Iter 10/10: ladvise speed: 0.940139
Average uncached read: .92
Average speedup with OSS cached read:  .90 = +-2.17%
Average speedup with ladvise willread:  .90 = +-2.17%
/home/green/git/lustre-release/lustre/tests/sanity.sh: line 21871:  ŒcÐV: < 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