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RISCY BUSINESS»Episode Guide
1.7 & 1.8
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Checking whether a coin is fair
[1]0:43[2]3:58
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code::dive conference 2015 - Andrei Alexandrescu - Writing Fast Code I
[3]5:01[4]12:14
David Patterson & John Hennessy (Morgan Kaufmann)
Computer Organization and Design RISC-V Edition
[5]15:19[6]15:45[7]19:47
[8]23:48[9]27:11[10]28:22
[11]29:12[12]35:08[13]38:20
[14]45:25[15]46:08[16]47:35
[17]57:44[18]1:00:20[19]1:03:30
[20]1:05:03
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0:09Recap last time's reading on performance measurements
0:09Recap last time's reading on performance measurements
0:09Recap last time's reading on performance measurements
0:38riskyfive o/
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0:38riskyfive o/
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0:38riskyfive o/
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0:43A few words on benchmarking and rigorously choosing a sample size1
0:43A few words on benchmarking and rigorously choosing a sample size1
0:43A few words on benchmarking and rigorously choosing a sample size1
3:40riskyfive Learning statistics from Wikipedia is hard. The definitions are kind of circular. They are easy to understand after you learn stats somewhere else
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3:40riskyfive Learning statistics from Wikipedia is hard. The definitions are kind of circular. They are easy to understand after you learn stats somewhere else
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3:40riskyfive Learning statistics from Wikipedia is hard. The definitions are kind of circular. They are easy to understand after you learn stats somewhere else
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3:58Estimator of true probability2
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3:58Estimator of true probability2
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3:58Estimator of true probability2
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5:01Some insights on performance timing from Andrei Alexandrescu3
5:01Some insights on performance timing from Andrei Alexandrescu3
5:01Some insights on performance timing from Andrei Alexandrescu3
10:45riskyfive I once argued that in a college project report. The professor wasn't very convinced. These days I would say choose a low percentile (the minimum would be the 0 percentile) and show the probability distribution
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10:45riskyfive I once argued that in a college project report. The professor wasn't very convinced. These days I would say choose a low percentile (the minimum would be the 0 percentile) and show the probability distribution
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10:45riskyfive I once argued that in a college project report. The professor wasn't very convinced. These days I would say choose a low percentile (the minimum would be the 0 percentile) and show the probability distribution
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12:14On using proxies to measure performance4
12:14On using proxies to measure performance4
12:14On using proxies to measure performance4
13:20Fix up the time formula
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13:20Fix up the time formula
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13:20Fix up the time formula
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15:19Chapter 1.7 - The Power Wall5
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15:19Chapter 1.7 - The Power Wall5
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15:19Chapter 1.7 - The Power Wall5
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15:45Figure 1.16 - Clock rate and power for Intel x86 microprocessors over eight generations and 30 years6
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15:45Figure 1.16 - Clock rate and power for Intel x86 microprocessors over eight generations and 30 years6
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15:45Figure 1.16 - Clock rate and power for Intel x86 microprocessors over eight generations and 30 years6
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19:47Chapter 1.7, on energy and power7
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19:47Chapter 1.7, on energy and power7
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19:47Chapter 1.7, on energy and power7
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21:53riskyfive It means proportional to
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21:53riskyfive It means proportional to
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21:53riskyfive It means proportional to
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22:07Energy equations
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22:07Energy equations
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22:07Energy equations
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23:48Chapter 1.7, on proportional energy8
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23:48Chapter 1.7, on proportional energy8
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23:48Chapter 1.7, on proportional energy8
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24:16Pulse energy and power
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24:16Pulse energy and power
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24:16Pulse energy and power
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27:11Chapter 1.7, frequency switched as a function of the clock rate9
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27:11Chapter 1.7, frequency switched as a function of the clock rate9
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27:11Chapter 1.7, frequency switched as a function of the clock rate9
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27:35riskyfive This is easy to imagine. Voltage is like pressure. You have pressure when the bucket is full. To change from high pressure (full/1) to low pressure (empty/0) you have to discharge the bucket. The size of the bucket (capacitive load) is what gets wasted, in proportion to the pressure with which the water came out
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27:35riskyfive This is easy to imagine. Voltage is like pressure. You have pressure when the bucket is full. To change from high pressure (full/1) to low pressure (empty/0) you have to discharge the bucket. The size of the bucket (capacitive load) is what gets wasted, in proportion to the pressure with which the water came out
🗪
27:35riskyfive This is easy to imagine. Voltage is like pressure. You have pressure when the bucket is full. To change from high pressure (full/1) to low pressure (empty/0) you have to discharge the bucket. The size of the bucket (capacitive load) is what gets wasted, in proportion to the pressure with which the water came out
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28:22Chapter 1.7, on the different growth factors of clock rate and power10
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28:22Chapter 1.7, on the different growth factors of clock rate and power10
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28:22Chapter 1.7, on the different growth factors of clock rate and power10
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29:12Chapter 1.7, Example: Relative Power11
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29:12Chapter 1.7, Example: Relative Power11
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29:12Chapter 1.7, Example: Relative Power11
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31:58Power ratio
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31:58Power ratio
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31:58Power ratio
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35:08Chapter 1.7, power leakage and distribution12
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35:08Chapter 1.7, power leakage and distribution12
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35:08Chapter 1.7, power leakage and distribution12
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38:20Chapter 1.8 - The Sea Change: The Switch from Uniprocessors to Multiprocessors13
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38:20Chapter 1.8 - The Sea Change: The Switch from Uniprocessors to Multiprocessors13
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38:20Chapter 1.8 - The Sea Change: The Switch from Uniprocessors to Multiprocessors13
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40:41A few words on eschewing reliance on more powerful hardware being a driving factor of the Handmade Network
40:41A few words on eschewing reliance on more powerful hardware being a driving factor of the Handmade Network
40:41A few words on eschewing reliance on more powerful hardware being a driving factor of the Handmade Network
43:15miblo Culture of laziness, or of "disengagement", perhaps?
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43:15miblo Culture of laziness, or of "disengagement", perhaps?
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43:15miblo Culture of laziness, or of "disengagement", perhaps?
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43:26A few words on cultural differences of software companies
43:26A few words on cultural differences of software companies
43:26A few words on cultural differences of software companies
45:25Chapter 1.8, quote from Brian Hayes on scoring music for a solo performer vs an orchestra14
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45:25Chapter 1.8, quote from Brian Hayes on scoring music for a solo performer vs an orchestra14
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45:25Chapter 1.8, quote from Brian Hayes on scoring music for a solo performer vs an orchestra14
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46:08Chapter 1.8, Hardware / Software Interface15
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46:08Chapter 1.8, Hardware / Software Interface15
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46:08Chapter 1.8, Hardware / Software Interface15
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47:35Figure 1.17 - Growth in processor performance since the mid-1980s16
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47:35Figure 1.17 - Growth in processor performance since the mid-1980s16
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47:35Figure 1.17 - Growth in processor performance since the mid-1980s16
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50:45A discussion point on explicit and implicit parallel programming
50:45A discussion point on explicit and implicit parallel programming
50:45A discussion point on explicit and implicit parallel programming
52:59riskyfive Auto vectorization?
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52:59riskyfive Auto vectorization?
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52:59riskyfive Auto vectorization?
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53:19On using parallelism in D
53:19On using parallelism in D
53:19On using parallelism in D
55:57riskyfive I'm not aware of any convincing path to some magic bullet solution
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55:57riskyfive I'm not aware of any convincing path to some magic bullet solution
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55:57riskyfive I'm not aware of any convincing path to some magic bullet solution
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56:18On pure functional programming in Haskell
56:18On pure functional programming in Haskell
56:18On pure functional programming in Haskell
57:44Chapter 1.8, on the difficulty to write explicitly parallel programs17
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57:44Chapter 1.8, on the difficulty to write explicitly parallel programs17
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57:44Chapter 1.8, on the difficulty to write explicitly parallel programs17
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1:00:20Chapter 1.8, summaries of parallelism throughout the book18
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1:00:20Chapter 1.8, summaries of parallelism throughout the book18
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1:00:20Chapter 1.8, summaries of parallelism throughout the book18
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1:03:30Chapter 1.8, preview of Chapter 6 on parallel programming19
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1:03:30Chapter 1.8, preview of Chapter 6 on parallel programming19
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1:03:30Chapter 1.8, preview of Chapter 6 on parallel programming19
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1:05:03Chapter 1.8, quote from J. Presper Eckert on computers in general20
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1:05:03Chapter 1.8, quote from J. Presper Eckert on computers in general20
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1:05:03Chapter 1.8, quote from J. Presper Eckert on computers in general20
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1:05:48We're out of time for today
1:05:48We're out of time for today
1:05:48We're out of time for today
1:06:48riskyfive By the way, I asked Casey Muratori about porting Handmade Hero to an FPGA-based system (like mine) instead of / in addition to the Raspberry Pi. He said cool, email me. I did, but I haven't heard back
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1:06:48riskyfive By the way, I asked Casey Muratori about porting Handmade Hero to an FPGA-based system (like mine) instead of / in addition to the Raspberry Pi. He said cool, email me. I did, but I haven't heard back
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1:06:48riskyfive By the way, I asked Casey Muratori about porting Handmade Hero to an FPGA-based system (like mine) instead of / in addition to the Raspberry Pi. He said cool, email me. I did, but I haven't heard back
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1:07:17Stay RISCY, everyone!
1:07:17Stay RISCY, everyone!
1:07:17Stay RISCY, everyone!