== sanity test 255a: check 'lfs ladvise -a willread' ===== 20:55:03 (1780966503)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 2.77686 s, 37.8 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: 0.620673
Iter 1/10: OSS cache speed: 0.638902
Iter 1/10: ladvise speed: 0.63615
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.602596
Iter 2/10: OSS cache speed: 0.661195
Iter 2/10: ladvise speed: 0.674337
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.592633
Iter 3/10: OSS cache speed: 0.614157
Iter 3/10: ladvise speed: 0.560653
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.601014
Iter 4/10: OSS cache speed: 0.566809
Iter 4/10: ladvise speed: 0.556889
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.510482
Iter 5/10: OSS cache speed: 0.563215
Iter 5/10: ladvise speed: 0.446261
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.548888
Iter 6/10: OSS cache speed: 0.731451
Iter 6/10: ladvise speed: 0.477029
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.640627
Iter 7/10: OSS cache speed: 0.599416
Iter 7/10: ladvise speed: 0.601354
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.620268
Iter 8/10: OSS cache speed: 0.634604
Iter 8/10: ladvise speed: 0.623193
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.558593
Iter 9/10: OSS cache speed: 0.553962
Iter 9/10: ladvise speed: 0.662616
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.581185
Iter 10/10: OSS cache speed: 0.601937
Iter 10/10: ladvise speed: 0.537554
Average uncached read: .58
Average speedup with OSS cached read:  .61 = +5.17%
Average speedup with ladvise willread:  .57 = +-1.72%
/home/green/git/lustre-release/lustre/tests/sanity.sh: line 21886: �D�̏U: < 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