== sanity test 255a: check 'lfs ladvise -a willread' ===== 07:50:34 (1788868234)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 12.5891 s, 8.3 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=8
fail_loc=0x237
Asynchronous ladvise shouldn't wait
llite.lustre-ffff9931d1719800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.367959
Iter 1/10: OSS cache speed: 0.355391
Iter 1/10: ladvise speed: 0.337372
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.355097
Iter 2/10: OSS cache speed: 0.365877
Iter 2/10: ladvise speed: 0.318254
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.337813