== sanity test 255a: check 'lfs ladvise -a willread' ===== 00:32:08 (1715574728)
100+0 records in
100+0 records out
104857600 bytes (105 MB) copied, 2.31701 s, 45.3 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=8
fail_loc=0x237
Asynchronous ladvise shouldn't wait
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 1.40734
Iter 1/10: OSS cache speed: 1.40129
Iter 1/10: ladvise speed: 1.36127
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 1.35836
Iter 2/10: OSS cache speed: 1.34741
Iter 2/10: ladvise speed: 1.32402
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 1.31137
Iter 3/10: OSS cache speed: 1.38098
Iter 3/10: ladvise speed: 1.34568
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 1.34624
Iter 4/10: OSS cache speed: 1.40692
Iter 4/10: ladvise speed: 1.31548
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 1.32931
Iter 5/10: OSS cache speed: 1.31033
Iter 5/10: ladvise speed: 1.57476
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 1.34933
Iter 6/10: OSS cache speed: 1.37886
Iter 6/10: ladvise speed: 1.35543
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 1.30803
Iter 7/10: OSS cache speed: 1.33665
Iter 7/10: ladvise speed: 1.33934
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 1.33979
Iter 8/10: OSS cache speed: 1.32464
Iter 8/10: ladvise speed: 1.3744
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 1.54923
Iter 9/10: OSS cache speed: 1.52036
Iter 9/10: ladvise speed: 1.33046
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 1.3605
Iter 10/10: OSS cache speed: 1.3438
Iter 10/10: ladvise speed: 1.35806
Average uncached read: 1.36
Average speedup with OSS cached read: 1.37 = +.73%
Average speedup with ladvise willread: 1.36 = +0%
/home/green/git/lustre-release/lustre/tests/sanity.sh: line 24479:   < 20 : < 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
fail_loc=0