tests: Improve perf_row_cache_update
tests: Improve perf_row_cache_update

We now test more kinds of workloads:
 - small partitions with no clustering key
 - large partition with lots of small rows
 - large partition with lots of range tombstones

We also collect statistics about scheduling latency induced by cache
update.

Example output:

Small partitions, no overwrites:
update: 356.809113 [ms], stall: {ticks: 396, min: 0.006867 [ms], 50%: 1.131752 [ms], 90%: 1.131752 [ms], 99%: 1.131752 [ms], max: 1.358102 [ms]}, cache: 257/257 [MB] LSA: 257/257 [MB] std free: 83 [MB]
update: 337.542999 [ms], stall: {ticks: 373, min: 0.001598 [ms], 50%: 1.131752 [ms], 90%: 1.131752 [ms], 99%: 1.131752 [ms], max: 1.358102 [ms]}, cache: 514/514 [MB] LSA: 514/514 [MB] std free: 83 [MB]
update: 383.485291 [ms], stall: {ticks: 425, min: 0.001598 [ms], 50%: 1.131752 [ms], 90%: 1.131752 [ms], 99%: 1.131752 [ms], max: 1.131752 [ms]}, cache: 771/788 [MB] LSA: 771/788 [MB] std free: 83 [MB]
update: 574.968811 [ms], stall: {ticks: 634, min: 0.001598 [ms], 50%: 1.131752 [ms], 90%: 1.131752 [ms], 99%: 1.629722 [ms], max: 1.955666 [ms]}, cache: 879/917 [MB] LSA: 879/917 [MB] std free: 83 [MB]
update: 411.541138 [ms], stall: {ticks: 455, min: 0.001598 [ms], 50%: 1.131752 [ms], 90%: 1.131752 [ms], 99%: 1.131752 [ms], max: 1.358102 [ms]}, cache: 787/835 [MB] LSA: 787/835 [MB] std free: 83 [MB]
update: 368.491211 [ms], stall: {ticks: 408, min: 0.001332 [ms], 50%: 1.131752 [ms], 90%: 1.131752 [ms], 99%: 1.131752 [ms], max: 1.131752 [ms]}, cache: 750/790 [MB] LSA: 750/790 [MB] std free: 83 [MB]
update: 343.671967 [ms], stall: {ticks: 380, min: 0.001598 [ms], 50%: 1.131752 [ms], 90%: 1.131752 [ms], 99%: 1.131752 [ms], max: 1.131752 [ms]}, cache: 734/769 [MB] LSA: 734/769 [MB] std free: 83 [MB]
update: 320.277283 [ms], stall: {ticks: 357, min: 0.001598 [ms], 50%: 1.131752 [ms], 90%: 1.131752 [ms], 99%: 1.131752 [ms], max: 1.131752 [ms]}, cache: 724/753 [MB] LSA: 724/753 [MB] std free: 83 [MB]
update: 310.583282 [ms], stall: {ticks: 344, min: 0.001598 [ms], 50%: 1.131752 [ms], 90%: 1.131752 [ms], 99%: 1.131752 [ms], max: 1.131752 [ms]}, cache: 714/740 [MB] LSA: 714/740 [MB] std free: 83 [MB]
update: 303.627106 [ms], stall: {ticks: 338, min: 0.001598 [ms], 50%: 1.131752 [ms], 90%: 1.131752 [ms], 99%: 1.131752 [ms], max: 1.955666 [ms]}, cache: 707/731 [MB] LSA: 707/731 [MB] std free: 83 [MB]
update: 296.742523 [ms], stall: {ticks: 330, min: 0.001332 [ms], 50%: 1.131752 [ms], 90%: 1.131752 [ms], 99%: 1.131752 [ms], max: 1.131752 [ms]}, cache: 701/724 [MB] LSA: 701/724 [MB] std free: 83 [MB]
update: 286.598541 [ms], stall: {ticks: 319, min: 0.001598 [ms], 50%: 1.131752 [ms], 90%: 1.131752 [ms], 99%: 1.131752 [ms], max: 1.131752 [ms]}, cache: 697/719 [MB] LSA: 697/719 [MB] std free: 83 [MB]
update: 288.649323 [ms], stall: {ticks: 321, min: 0.001598 [ms], 50%: 1.131752 [ms], 90%: 1.131752 [ms], 99%: 1.131752 [ms], max: 1.131752 [ms]}, cache: 694/715 [MB] LSA: 694/715 [MB] std free: 83 [MB]
update: 282.069916 [ms], stall: {ticks: 314, min: 0.001598 [ms], 50%: 1.131752 [ms], 90%: 1.131752 [ms], 99%: 1.131752 [ms], max: 1.131752 [ms]}, cache: 692/712 [MB] LSA: 692/712 [MB] std free: 83 [MB]
update: 292.462036 [ms], stall: {ticks: 325, min: 0.001917 [ms], 50%: 1.131752 [ms], 90%: 1.131752 [ms], 99%: 1.131752 [ms], max: 1.131752 [ms]}, cache: 689/708 [MB] LSA: 689/708 [MB] std free: 83 [MB]
update: 274.390442 [ms], stall: {ticks: 305, min: 0.001332 [ms], 50%: 1.131752 [ms], 90%: 1.131752 [ms], 99%: 1.131752 [ms], max: 1.131752 [ms]}, cache: 687/705 [MB] LSA: 687/705 [MB] std free: 83 [MB]
invalidation: 172.617508 [ms]
Large partition, lots of small rows:
update: 262.132721 [ms], stall: {ticks: 4, min: 0.002300 [ms], 50%: 0.005722 [ms], 90%: 0.014237 [ms], 99%: 0.014237 [ms], max: 268.650944 [ms]}, cache: 187/188 [MB] LSA: 187/188 [MB] std free: 82 [MB]
update: 281.359467 [ms], stall: {ticks: 4, min: 0.002300 [ms], 50%: 0.004768 [ms], 90%: 0.017084 [ms], 99%: 0.017084 [ms], max: 322.381152 [ms]}, cache: 375/376 [MB] LSA: 375/376 [MB] std free: 82 [MB]
update: 287.229065 [ms], stall: {ticks: 4, min: 0.002300 [ms], 50%: 0.004768 [ms], 90%: 0.017084 [ms], 99%: 0.017084 [ms], max: 322.381152 [ms]}, cache: 563/564 [MB] LSA: 563/564 [MB] std free: 82 [MB]
update: 1294.816284 [ms], stall: {ticks: 4, min: 0.001917 [ms], 50%: 0.005722 [ms], 90%: 0.014237 [ms], 99%: 0.014237 [ms], max: 1386.179840 [ms]}, cache: 586/625 [MB] LSA: 586/625 [MB] std free: 82 [MB]
update: 845.022461 [ms], stall: {ticks: 4, min: 0.002300 [ms], 50%: 0.005722 [ms], 90%: 0.017084 [ms], 99%: 0.017084 [ms], max: 962.624896 [ms]}, cache: 439/475 [MB] LSA: 439/475 [MB] std free: 82 [MB]
update: 380.335938 [ms], stall: {ticks: 4, min: 0.002300 [ms], 50%: 0.004768 [ms], 90%: 0.014237 [ms], 99%: 0.014237 [ms], max: 386.857376 [ms]}, cache: 599/600 [MB] LSA: 599/600 [MB] std free: 82 [MB]
update: 477.234680 [ms], stall: {ticks: 4, min: 0.002760 [ms], 50%: 0.004768 [ms], 90%: 0.014237 [ms], 99%: 0.014237 [ms], max: 557.074624 [ms]}, cache: 599/600 [MB] LSA: 599/600 [MB] std free: 82 [MB]
update: 525.955017 [ms], stall: {ticks: 4, min: 0.002300 [ms], 50%: 0.004768 [ms], 90%: 0.014237 [ms], 99%: 0.014237 [ms], max: 557.074624 [ms]}, cache: 599/600 [MB] LSA: 599/600 [MB] std free: 82 [MB]
update: 548.003784 [ms], stall: {ticks: 4, min: 0.002300 [ms], 50%: 0.006866 [ms], 90%: 0.017084 [ms], 99%: 0.017084 [ms], max: 557.074624 [ms]}, cache: 599/600 [MB] LSA: 599/600 [MB] std free: 82 [MB]
update: 528.697937 [ms], stall: {ticks: 4, min: 0.002300 [ms], 50%: 0.004768 [ms], 90%: 0.014237 [ms], 99%: 0.014237 [ms], max: 557.074624 [ms]}, cache: 599/600 [MB] LSA: 599/600 [MB] std free: 82 [MB]
update: 609.292603 [ms], stall: {ticks: 4, min: 0.002300 [ms], 50%: 0.005722 [ms], 90%: 0.014237 [ms], 99%: 0.014237 [ms], max: 668.489536 [ms]}, cache: 599/600 [MB] LSA: 599/600 [MB] std free: 82 [MB]
update: 575.762451 [ms], stall: {ticks: 4, min: 0.002300 [ms], 50%: 0.004768 [ms], 90%: 0.017084 [ms], 99%: 0.017084 [ms], max: 668.489536 [ms]}, cache: 599/600 [MB] LSA: 599/600 [MB] std free: 82 [MB]
update: 530.801392 [ms], stall: {ticks: 4, min: 0.002300 [ms], 50%: 0.004768 [ms], 90%: 0.014237 [ms], 99%: 0.014237 [ms], max: 557.074624 [ms]}, cache: 599/600 [MB] LSA: 599/600 [MB] std free: 82 [MB]
update: 535.948364 [ms], stall: {ticks: 4, min: 0.002300 [ms], 50%: 0.004768 [ms], 90%: 0.017084 [ms], 99%: 0.017084 [ms], max: 557.074624 [ms]}, cache: 599/600 [MB] LSA: 599/600 [MB] std free: 82 [MB]
update: 527.143555 [ms], stall: {ticks: 4, min: 0.002300 [ms], 50%: 0.004768 [ms], 90%: 0.020501 [ms], 99%: 0.020501 [ms], max: 557.074624 [ms]}, cache: 599/600 [MB] LSA: 599/600 [MB] std free: 82 [MB]
update: 521.869202 [ms], stall: {ticks: 4, min: 0.002760 [ms], 50%: 0.004768 [ms], 90%: 0.017084 [ms], 99%: 0.017084 [ms], max: 557.074624 [ms]}, cache: 599/600 [MB] LSA: 599/600 [MB] std free: 82 [MB]
invalidation: 173.069733 [ms]
Large partition, lots of range tombstones:
update: 224.003220 [ms], stall: {ticks: 4, min: 0.001917 [ms], 50%: 0.004768 [ms], 90%: 0.014237 [ms], 99%: 0.014237 [ms], max: 268.650944 [ms]}, cache: 52/52 [MB] LSA: 52/52 [MB] std free: 82 [MB]
update: 570.882874 [ms], stall: {ticks: 4, min: 0.002300 [ms], 50%: 0.004768 [ms], 90%: 0.014237 [ms], 99%: 0.014237 [ms], max: 668.489536 [ms]}, cache: 105/105 [MB] LSA: 105/105 [MB] std free: 82 [MB]
update: 577.249878 [ms], stall: {ticks: 4, min: 0.002300 [ms], 50%: 0.004768 [ms], 90%: 0.014237 [ms], 99%: 0.014237 [ms], max: 668.489536 [ms]}, cache: 158/158 [MB] LSA: 158/158 [MB] std free: 82 [MB]
update: 580.239624 [ms], stall: {ticks: 4, min: 0.002300 [ms], 50%: 0.004768 [ms], 90%: 0.014237 [ms], 99%: 0.014237 [ms], max: 668.489536 [ms]}, cache: 211/211 [MB] LSA: 211/211 [MB] std free: 82 [MB]
update: 614.187134 [ms], stall: {ticks: 4, min: 0.001917 [ms], 50%: 0.004768 [ms], 90%: 0.011864 [ms], 99%: 0.011864 [ms], max: 668.489536 [ms]}, cache: 264/264 [MB] LSA: 264/264 [MB] std free: 82 [MB]
update: 618.709229 [ms], stall: {ticks: 4, min: 0.002300 [ms], 50%: 0.003973 [ms], 90%: 0.014237 [ms], 99%: 0.014237 [ms], max: 668.489536 [ms]}, cache: 317/317 [MB] LSA: 317/317 [MB] std free: 82 [MB]
update: 626.943359 [ms], stall: {ticks: 4, min: 0.001598 [ms], 50%: 0.004768 [ms], 90%: 0.014237 [ms], 99%: 0.014237 [ms], max: 668.489536 [ms]}, cache: 369/370 [MB] LSA: 369/370 [MB] std free: 82 [MB]
update: 602.873474 [ms], stall: {ticks: 4, min: 0.001917 [ms], 50%: 0.003973 [ms], 90%: 0.014237 [ms], 99%: 0.014237 [ms], max: 668.489536 [ms]}, cache: 422/423 [MB] LSA: 422/423 [MB] std free: 82 [MB]
update: 617.522583 [ms], stall: {ticks: 4, min: 0.001598 [ms], 50%: 0.004768 [ms], 90%: 0.014237 [ms], 99%: 0.014237 [ms], max: 668.489536 [ms]}, cache: 475/475 [MB] LSA: 475/475 [MB] std free: 82 [MB]
update: 627.291138 [ms], stall: {ticks: 4, min: 0.001598 [ms], 50%: 0.004768 [ms], 90%: 0.011864 [ms], 99%: 0.011864 [ms], max: 668.489536 [ms]}, cache: 528/528 [MB] LSA: 528/528 [MB] std free: 82 [MB]
update: 623.720886 [ms], stall: {ticks: 4, min: 0.001598 [ms], 50%: 0.003973 [ms], 90%: 0.014237 [ms], 99%: 0.014237 [ms], max: 668.489536 [ms]}, cache: 581/581 [MB] LSA: 581/581 [MB] std free: 82 [MB]
update: 630.735596 [ms], stall: {ticks: 4, min: 0.002300 [ms], 50%: 0.004768 [ms], 90%: 0.014237 [ms], 99%: 0.014237 [ms], max: 668.489536 [ms]}, cache: 634/634 [MB] LSA: 634/634 [MB] std free: 82 [MB]
update: 2776.525635 [ms], stall: {ticks: 4, min: 0.002300 [ms], 50%: 0.004768 [ms], 90%: 0.014237 [ms], 99%: 0.014237 [ms], max: 2874.382592 [ms]}, cache: 687/687 [MB] LSA: 687/687 [MB] std free: 82 [MB]

scylladb/scylla,avikivity/scylla,duarten/scylla,duarten/scylla,scylladb/scylla,scylladb/scylla,avikivity/scylla,scylladb/scylla,avikivity/scylla,duarten/scylla