== sanity test 255a: check 'lfs ladvise -a willread' ===== 09:24:10 (1761312250)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 1.95507 s, 53.6 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: 0.652044
Iter 1/10: OSS cache speed: 0.690118
Iter 1/10: ladvise speed: 0.686294
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.682943
Iter 2/10: OSS cache speed: 0.722593
Iter 2/10: ladvise speed: 0.645422
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.63316
Iter 3/10: OSS cache speed: 0.618934
Iter 3/10: ladvise speed: 0.717635
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.651432
Iter 4/10: OSS cache speed: 0.784739
Iter 4/10: ladvise speed: 0.717191
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.739648
Iter 5/10: OSS cache speed: 0.763221
Iter 5/10: ladvise speed: 0.580426
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.632206
Iter 6/10: OSS cache speed: 0.614457
Iter 6/10: ladvise speed: 0.659929
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.627689
Iter 7/10: OSS cache speed: 0.634299
Iter 7/10: ladvise speed: 0.628766
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.645826
Iter 8/10: OSS cache speed: 0.520036
Iter 8/10: ladvise speed: 0.67512
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.503017
Iter 9/10: OSS cache speed: 0.502665
Iter 9/10: ladvise speed: 0.578984
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.59718
Iter 10/10: OSS cache speed: 0.632274
Iter 10/10: ladvise speed: 0.584303
Average uncached read: .63
Average speedup with OSS cached read:  .64 = +1.58%
Average speedup with ladvise willread:  .64 = +1.58%
/home/green/git/lustre-release/lustre/tests/sanity.sh: line 21871: PYs
üU: < 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