== sanity test 255a: check 'lfs ladvise -a willread' ===== 13:41:19 (1761241279)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 1.39465 s, 75.2 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: 0.605741
Iter 1/10: OSS cache speed: 0.671316
Iter 1/10: ladvise speed: 0.67812
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.6061
Iter 2/10: OSS cache speed: 0.742226
Iter 2/10: ladvise speed: 0.697065
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.775723
Iter 3/10: OSS cache speed: 0.708272
Iter 3/10: ladvise speed: 0.719786
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.71248
Iter 4/10: OSS cache speed: 0.712479
Iter 4/10: ladvise speed: 0.718527
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.658416
Iter 5/10: OSS cache speed: 0.678905
Iter 5/10: ladvise speed: 0.658623
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.642512
Iter 6/10: OSS cache speed: 0.618961
Iter 6/10: ladvise speed: 0.660538
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.629451
Iter 7/10: OSS cache speed: 0.693517
Iter 7/10: ladvise speed: 0.597358
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.598568
Iter 8/10: OSS cache speed: 0.635739
Iter 8/10: ladvise speed: 0.668707
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.698198
Iter 9/10: OSS cache speed: 0.666586
Iter 9/10: ladvise speed: 0.623941
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.58583
Iter 10/10: OSS cache speed: 0.61535
Iter 10/10: ladvise speed: 0.719049
Average uncached read: .65
Average speedup with OSS cached read:  .67 = +3.07%
Average speedup with ladvise willread:  .67 = +3.07%
/home/green/git/lustre-release/lustre/tests/sanity.sh: line 21855: @Χ/éU: < 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