== sanity test 255a: check 'lfs ladvise -a willread' ===== 12:50:15 (1781283015)
100+0 records in
100+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 1.95856 s, 53.5 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: 0.812953
Iter 1/10: OSS cache speed: 0.909034
Iter 1/10: ladvise speed: 0.83482
Iter 2/10: reading without willread hint
Iter 2/10: uncached speed: 0.841723
Iter 2/10: OSS cache speed: 0.862832
Iter 2/10: ladvise speed: 0.743568
Iter 3/10: reading without willread hint
Iter 3/10: uncached speed: 0.78129
Iter 3/10: OSS cache speed: 0.843924
Iter 3/10: ladvise speed: 0.788957
Iter 4/10: reading without willread hint
Iter 4/10: uncached speed: 0.858144
Iter 4/10: OSS cache speed: 0.774961
Iter 4/10: ladvise speed: 0.788089
Iter 5/10: reading without willread hint
Iter 5/10: uncached speed: 0.666734
Iter 5/10: OSS cache speed: 0.821887
Iter 5/10: ladvise speed: 0.67574
Iter 6/10: reading without willread hint
Iter 6/10: uncached speed: 0.789271
Iter 6/10: OSS cache speed: 0.715904
Iter 6/10: ladvise speed: 0.711476
Iter 7/10: reading without willread hint
Iter 7/10: uncached speed: 0.640691
Iter 7/10: OSS cache speed: 0.780941
Iter 7/10: ladvise speed: 0.732534
Iter 8/10: reading without willread hint
Iter 8/10: uncached speed: 0.808921
Iter 8/10: OSS cache speed: 0.560787
Iter 8/10: ladvise speed: 0.7857
Iter 9/10: reading without willread hint
Iter 9/10: uncached speed: 0.791796
Iter 9/10: OSS cache speed: 0.722548
Iter 9/10: ladvise speed: 0.715036
Iter 10/10: reading without willread hint
Iter 10/10: uncached speed: 0.784284
Iter 10/10: OSS cache speed: 0.726913
Iter 10/10: ladvise speed: 0.699189
Average uncached read: .77
Average speedup with OSS cached read:  .77 = +0%
Average speedup with ladvise willread:  .74 = +-3.89%
/home/green/git/lustre-release/lustre/tests/sanity.sh: line 21886: 0V½Â: < 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