== sanity test 255a: check 'lfs ladvise -a willread' ===== 09:39:19 (1761226759)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 1.94806 s, 53.8 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: 0.823858
Iter 1/10: OSS cache speed: 0.832831
Iter 1/10: ladvise speed: 0.791964
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.761708
Iter 2/10: OSS cache speed: 0.908391
Iter 2/10: ladvise speed: 0.67894
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.867753
Iter 3/10: OSS cache speed: 0.855265
Iter 3/10: ladvise speed: 0.940248
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.923224
Iter 4/10: OSS cache speed: 0.905543
Iter 4/10: ladvise speed: 0.873019
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.883713
Iter 5/10: OSS cache speed: 0.845008
Iter 5/10: ladvise speed: 0.779465
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.841059
Iter 6/10: OSS cache speed: 0.773916
Iter 6/10: ladvise speed: 0.841276
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.78396
Iter 7/10: OSS cache speed: 0.796456
Iter 7/10: ladvise speed: 0.638985
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.798231
Iter 8/10: OSS cache speed: 0.824361
Iter 8/10: ladvise speed: 0.735379
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.704194
Iter 9/10: OSS cache speed: 0.773164
Iter 9/10: ladvise speed: 0.872569
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.84107
Iter 10/10: OSS cache speed: 0.746013
Iter 10/10: ladvise speed: 0.900197
Average uncached read: .82
Average speedup with OSS cached read:  .82 = +0%
Average speedup with ladvise willread:  .80 = +-2.43%
/home/green/git/lustre-release/lustre/tests/sanity.sh: line 21855: Žb@V: < 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