== sanity test 255a: check 'lfs ladvise -a willread' ===== 17:49:14 (1781300954)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 2.00329 s, 52.3 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=4
fail_loc=0x237
Asynchronous ladvise shouldn't wait
fail_loc=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.631467
Iter 1/10: OSS cache speed: 0.607722
Iter 1/10: ladvise speed: 0.67435
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.609514
Iter 2/10: OSS cache speed: 0.699998
Iter 2/10: ladvise speed: 0.716408
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.688275
Iter 3/10: OSS cache speed: 0.699323
Iter 3/10: ladvise speed: 0.594813
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.6068
Iter 4/10: OSS cache speed: 0.689499
Iter 4/10: ladvise speed: 0.539522
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.583539
Iter 5/10: OSS cache speed: 0.596199
Iter 5/10: ladvise speed: 0.548397
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.523199
Iter 6/10: OSS cache speed: 0.523701
Iter 6/10: ladvise speed: 0.634243
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.669269
Iter 7/10: OSS cache speed: 0.628234
Iter 7/10: ladvise speed: 0.654746
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.643301
Iter 8/10: OSS cache speed: 0.637152
Iter 8/10: ladvise speed: 0.584269
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.631087
Iter 9/10: OSS cache speed: 0.61579
Iter 9/10: ladvise speed: 0.599423
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.636869
Iter 10/10: OSS cache speed: 0.663987
Iter 10/10: ladvise speed: 0.564239
Average uncached read: .62
Average speedup with OSS cached read:  .63 = +1.61%
Average speedup with ladvise willread:  .61 = +-1.61%
/home/green/git/lustre-release/lustre/tests/sanity.sh: line 21906: ÐêæB¦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