@rzezeski @codinghorror @brendangregg they gave us the example at uni of 'driving along the road', 'sailing to Australia' etc for comparison
I love the second-based scale @brendangregg used in "Systems Performance". L3 cache 43s, SSD 2-6 days. Very obviouspic.twitter.com/ORr8mcPzOh
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@finoutlook@codinghorror@brendangregg Yes, I've seen that style before.But thinking about waiting 42s vs 2-6days really drives it home.
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MT
@rzezeski love the second-based scale@brendangregg used in "Systems Performance". L3 cache 43s, SSD 2-6 days. pic.twitter.com/q01TwEFPJE#fb
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@rzezeski@brendangregg rotational IO 12 months *cries* -
@rzezeski@admung@brendangregg Yeah, saw this earlier. Basing it on seconds makes it more real. Great take on timings. -
@rzezeski@aphyr@brendangregg@natbro I want perf analysis tools that give this output. -
@rzezeski@opensolaris@brendangregg first heard of this 1 second scale-up being used by ex-Sun Dave Quarrell in the UK many years ago! -
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@brendangregg@rzezeski I'd love to add bandwidth in there: because sometimes it's worth waiting a month for processed goods.
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I envy CPU L1$ with 3 (4) cycle latency and throughput of 2 loads per cycle. GPU L1$ latency is way higher. And load throughput 1/16 cycles.
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Love this. Makes the order of magnitude differences between cache, RAM and disk much easier to visualise.
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I feel old now that the last time I saw one of these it didn't have an SSD entry >.>
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@rzezeski Congrats on your 250★ tweet! http://favstar.fm/t/398306728263315456 … -
@rzezeski@mike_acton@brendangregg Rebooting certainly feels like it takes multiple millennia. -
@rzezeski@moonpolysoft@brendangregg Been waiting for months for this book's release---arrived Thurs but haven't had a chance to crack yet. -
@rzezeski wishing I'd bought the physical copy now -
@rzezeski@codinghorror@brendangregg It also shows how "micro" - in terms of work done - each single cpu cycle is. -
@rzezeski@brendangregg TCP retransmit is usually only so bad at connection time, thanks to http://tools.ietf.org/html/rfc2988 -
@rzezeski@brendangregg This is extremely cool! :D
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