== sanity test 255a: check 'lfs ladvise -a willread' ===== 09:56:09 (1761314169)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 2.204 s, 47.6 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: 0.641086
Iter 1/10: OSS cache speed: 0.502514
Iter 1/10: ladvise speed: 0.64311
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.689193
Iter 2/10: OSS cache speed: 0.67482
Iter 2/10: ladvise speed: 0.602659
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.633957
Iter 3/10: OSS cache speed: 0.664598
Iter 3/10: ladvise speed: 0.626462
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.676385
Iter 4/10: OSS cache speed: 0.703458
Iter 4/10: ladvise speed: 0.644562
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.659207
Iter 5/10: OSS cache speed: 0.61408
Iter 5/10: ladvise speed: 0.663251
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.651793
Iter 6/10: OSS cache speed: 0.540212
Iter 6/10: ladvise speed: 0.526388
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.518435
Iter 7/10: OSS cache speed: 0.654986
Iter 7/10: ladvise speed: 0.593953
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.619856
Iter 8/10: OSS cache speed: 0.651823
Iter 8/10: ladvise speed: 0.688651
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.675287
Iter 9/10: OSS cache speed: 0.639944
Iter 9/10: ladvise speed: 0.640454
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.640508
Iter 10/10: OSS cache speed: 0.649925
Iter 10/10: ladvise speed: 0.716339
Average uncached read: .64
Average speedup with OSS cached read:  .62 = +-3.12%
Average speedup with ladvise willread:  .63 = +-1.56%
/home/green/git/lustre-release/lustre/tests/sanity.sh: line 21871:  <˜>®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