== sanity test 255a: check 'lfs ladvise -a willread' ===== 11:48:24 (1776268104)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 2.62547 s, 39.9 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: 0.470664
Iter 1/10: OSS cache speed: 0.551671
Iter 1/10: ladvise speed: 0.592341
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.667591
Iter 2/10: OSS cache speed: 0.662479
Iter 2/10: ladvise speed: 0.635996
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.683059
Iter 3/10: OSS cache speed: 0.565632
Iter 3/10: ladvise speed: 0.641505
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.709011
Iter 4/10: OSS cache speed: 0.676597
Iter 4/10: ladvise speed: 0.744576
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.747306
Iter 5/10: OSS cache speed: 0.698584
Iter 5/10: ladvise speed: 0.761138
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.733725
Iter 6/10: OSS cache speed: 0.640096
Iter 6/10: ladvise speed: 0.571744
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.73699
Iter 7/10: OSS cache speed: 0.582141
Iter 7/10: ladvise speed: 0.548608
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.695943
Iter 8/10: OSS cache speed: 0.631503
Iter 8/10: ladvise speed: 0.599808
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.616875
Iter 9/10: OSS cache speed: 0.54447
Iter 9/10: ladvise speed: 0.456136
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.703111
Iter 10/10: OSS cache speed: 0.707167
Iter 10/10: ladvise speed: 0.671681
Average uncached read: .67
Average speedup with OSS cached read:  .62 = +-7.46%
Average speedup with ladvise willread:  .62 = +-7.46%
/home/green/git/lustre-release/lustre/tests/sanity.sh: line 21886: 0L……: < 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