== sanity test 255a: check 'lfs ladvise -a willread' ===== 01:38:13 (1786340293)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 11.2628 s, 9.3 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-ffff8e6090c72800.hybrid_io=0
Iter 1/10: reading without willread hint
Iter 1/10: uncached speed: 0.41371
Iter 1/10: OSS cache speed: 0.462203
Iter 1/10: ladvise speed: 0.514179
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.391443
Iter 2/10: OSS cache speed: 0.501017
Iter 2/10: ladvise speed: 0.507743
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.42289
Iter 3/10: OSS cache speed: 0.409959
Iter 3/10: ladvise speed: 0.555264
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.498459
Iter 4/10: OSS cache speed: 0.466183
Iter 4/10: ladvise speed: 0.484289
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.381506
Iter 5/10: OSS cache speed: 0.45291
Iter 5/10: ladvise speed: 0.499198
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.536241
Iter 6/10: OSS cache speed: 0.535578
Iter 6/10: ladvise speed: 0.67738
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.609307
Iter 7/10: OSS cache speed: 0.71709
Iter 7/10: ladvise speed: 0.809948
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.66549
Iter 8/10: OSS cache speed: 0.745272
Iter 8/10: ladvise speed: 0.763068
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.633779
Iter 9/10: OSS cache speed: 0.724562
Iter 9/10: ladvise speed: 0.935556
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.748032
Iter 10/10: OSS cache speed: 0.901187
Iter 10/10: ladvise speed: 0.925608
Average uncached read: .53
Average speedup with OSS cached read:  .59 = +11%
Average speedup with ladvise willread:  .66 = +24%
Speedup with OSS cached read less than 20%,  got 11%. Skipping ladvise willread check.
fail_loc=0