brendangregg.com

	Excellent Practice	24

	Improvement Could be Made	12

	Critical Issues to Attend	13

Jan 30, 2025 10:57 PM

Recommended Actions

✔ Create and add a robots.txt for your site.
✔ Create a XML sitemap for your site.
✔ Remove some of the text content and make the text to code ration to be within 15%-70%.
✔ Move the 14 inline css components to an external style sheet file.
✔ Configure the server so that your site with or without 'www' (http://www.brendangregg.com, http://brendangregg.com) are resolved to the same URL.
✔ Reduce number of links to other pages.
✔ Add more authoritative back-links for your site.
✔ Add more authoritative back-links for your site.
✔ Increase the traffic of your site.
✔ Host the site closer to the geo location where most of your site visitors come from.
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Detailed Reviews

Related Category

Most related categories of this website.

apps art community forum linux social software startups

Title

Brendan Gregg's Homepage

Words count: 3 Unique Words: 3 Length: 24 characters
[ To optimize the page title, Use this SEO Title Optimizer ]

Excellent! the title contains 1-12 words, and within 10-70 characters!

The title will be displayed in search engine results in the form of a direct link to the site.

Tips:
1. ideally, the title should contain 10 to 70 characters, including spaces. (Google displays up to 70 characters in the title, and takes into account only the first 12 words.)
2. put the most important and relevant keywords in the title, try not to repeat any word.
3. each individual page should have a unique title.

Description

Brendan Gregg's homepage: I use this site to share various things, mostly my work with computers, specifically, computer performance analysis and methodology.

Words count: 22 Length: 158 characters
[ To optimize the page description, Use this SEO Meta Description Optimizer ]

Excellent! Your meta description contains between 70 and 160 characters.

Meta Descriptions provide concise explanations of the contents of web pages, that are commonly used by search engines on search result pages to display preview snippets for a given page.

Tips:
1. it is best to keep meta descriptions between 70-160 characters.
2. a readable, compelling description using important keywords can draw a much higher click-through rate of searchers to the given web page.
3. avoid keyword stuffing, ensure each page has its own unique description.

Google SERP Preview

Brendan Gregg's Homepage www.brendangregg.com/
Brendan Gregg's homepage: I use this site to share various things, mostly my work with computers, specifically, computer performance analysis and ...

[ To optimize this Google SERP preview, Use this Google SERP Optimizer ]

This is how your site looks like in Google Search Result Page.

an optimized SERP snippet will have a higher click through rate.

Tips:
1. make sure the title is clear, simple, straight to the point.
2. make sure the description is relevant and properly summarized the page content.

Keywords

Brendan Gregg, Brendan Gregg Homepage

Words count: 5 Length: 36 characters keyword phrases count : 2

The keywords is too short!
[ To optimize the meta keywords, Use this SEO Meta Keywords Optimizer ]

Keyword Occurrences in Different Sections
Word		keyword	content
2 words	:	50% (1/2)
		brendan gregg	0 (0%)
3 words	:	50% (1/2)
		brendan gregg homepage	0 (0%)

Meta keywords should not be ignored, though they are not a major ranking factor for most of search engines nowadays. A Meta keywords tag is supposed to be a brief and concise list of the most important themes of your page

Tips:
1. keep your list of keywords or keyword phrases down to 10 - 20 unique words or phrases.
2. separate the words or phrases using a comma (you do not need to leave a space between words separated by commas).
3. do not repeat words or phrases.
4. put your most important word or phrases at the beginning of your list.

Keywords Cloud

This keywords cloud gives your an idea of what are those important keywords appears in your website.

analysis analytics blog book cloud computing covered cpu dtrace ebpf flame graphs heat including kernel latency linux maps method methodology netflix observability pdf perf performance post showing slides storage summarizing sun systems talk tools tracing usenix visualizing work youtube zfs

Top 20 Keywords

Total Terms Count: 2,849

Excellent! No terms has a density of more than 3%, all are optimized to be within 1% - 3%.

Top 20 terms occurance and density
Keyword	In Body	Density
performance	78	2.74%
slides	62	2.18%
pdf	44	1.54%
linux	42	1.47%
tools	38	1.33%
talk	31	1.09%
graphs	31	1.09%
post	31	1.09%
analysis	28	0.98%
youtube	28	0.98%
flame	28	0.98%
perf	22	0.77%
including	21	0.74%
systems	20	0.70%
ebpf	18	0.63%
cpu	18	0.63%
latency	18	0.63%
maps	17	0.60%
heat	16	0.56%
dtrace	16	0.56%

keyword density can be used as a factor in determining whether a web page is relevant to a specified keyword or keyword phrase.

Tips:
1. the optimum keyword density to be 1.0% - 3.0%. Using a keyword more than that could be considered search spam.
2. overuse of keywords, a practice called keyword stuffing, will cause a web page to be penalized.

Highlight

<H1>	<H2>	<H3>	<H4>	<H5>	<H6>	<B>	<U>	<I>	<EM>	<STRONG>	Total
1	4	0	0	0	0	0	0	4	0	0	9

Excellent! The page is using HTML headings (<H1> - <H6>) and inline emphasis tags (<EM><B><I><EM><STRONG>)

<H1> (1)	Brendan Gregg's Homepage
<H2> (4)	Documentation Videos Software Misc
<I> (4)	Systems Performance 2nd Ed. BPF Performance Tools book Systems Performance 2nd Ed. BPF Performance Tools book

HTML headings and emphasis tags are the most basic forms to indicate important content.

Tips:
1. use your keywords in the headings and make sure the first level heading (<H1>) includes the most important keywords.
2. never duplicate the title tag content in the heading tags.
3. for more effective SEO, use only one <H1> tag per page

Reading Level

52.2

Excellent! the reading level score is just nice, that is within 50 - 70 !

Ensure your page content text can be read and understood by most of your site visitors. not too difficult nor too simple.

Tips:
1. a score below 30, indicates the text content is too difficult to be read and understood.
2. a sore above 80, may suggest that the site is lack of in-depth and expertise of its topics (low quality content).
3. an optimal reading level score shall be 50-70.

Language

the website does not declare its language in use.

the detected language is : en

Declare the language in use can help search engine to better understand and rendering your page, especially when special characters are encountered.

Page Encoding

iso-8859-1 Excellent! the website declared its character encoding.

Declare the character encoding can help search engine to better rendering your page, especially when it comes to
non-asii characters.

Favicon

Excellent! the website has a shortcut favicon image.

RSS

the website does not have a RSS Feed.

Robots.txt

Robots.txt is not presented for the site.

Robots.txt file can be used to regulate access of search engine crawlers, properly configured robots.txt file can help
crawlers to better understand your website.

Tips:
1. grand robots access to those pages you wish them to crawl.
2. restrict access to those pages you do not wish search engines to see and crawl.

XML Sitemap

XML Sitemap is not presented for the site.
[ To generate XML sitemap, Use this XML Sitemap Generator ]

Sitemap helps search engine crawler to identify your website pages.

Tips:
1. ensure all your important pages are listed in the sitemap.
2. ensure to indicate the frequency of change and importance of each url.
3. inform search engines of the location/URL of your sitemap (eg, For Google, you can set the website sitemap location through Google Webmaster management panel).

Loading Time

0.50 seconds - 68.99 Kb/s

Excellent! the site is pretty fast and it takes less than 1 second to load.

Estimated loading time for different internet connections
Modem (56Kbits/s)	Mobile/HSDPAM (7.2Mbits/s)	ADSL (8Mbits/s)	Cable (30Mbits/s)	Optical Fibre (100Mbits/s)
4.93 s	0.04 s	0.03 s	0.01 s	2.76 ms

Site speed is becoming an crucial ranking factor. Slow page loading is one of the biggest complains of web users. If the loading time is too long, you may need to check your server, network, or system codes and structure.

Tips:
1. ideal loading time is less than 1 seconds, if it take more than 5 seconds to load your site, likely users will run out of patience, so do search engines.
2. improve your SEO by optimizing your website to have a small size and faster responding server.

Total Size

34 Kb (34,495 bytes)

Excellent! the page size is just nice, that is within 30K-150K!

Page size affects the speed of your website.

Tips:
1. try to keep you page size between 30K-150K
2. put javascript and style sheet in separate files, and link them to the main page.
3. use optimized images for web and set up your server with gzip for downloading

Text To Code Ratio

Total Size	Text Size	HTML Code Size	Text/HTML Code Ratio
34 Kb (34,495 bytes)	22 Kb (22,155 bytes)	12 Kb (12,340 bytes)	179.54 %

The Text/HTML Code Ratio is a bit too high, it might be considered as spam by search engines.

the ratio of text to HTML code should always be above 15% for good SEO gain,
it is below 15% then that means that your website probably needs more text content.

Tips:
1. a ratio between 25% and 70% is ideal, when it goes beyond than that, the page might run the risk of being considered as spam. As long as the content is relevant and gives essential information, it is a plus point to have more of it.
2. improve your SEO by adding more relevant text to your pages and also increasing your keyword density.

Flash

Excellent! No flash component is detected on this page.

Flash content can not be properly indexed by search engines, and normally flash file is large in size, which slow down the loading of your page.

Tips:
1. avoid flash content whenever possible if you wish to have a fast and SEO friendly website.

Frame

Excellent! No frame is detected on this page.

Framesets and individual frames could cause problem for search engine to crawl your pages

Tips:
1. avoid frames whenever possible.
2. search engines do not like frames.
3. use iframe instead if you really have no choice.

Inline CSS

14 Inline CSS components are detected on this page.

It is a good practice to move inline CSS rules into an external CSS file in order to make your page lighter and increasing the text to code ratio.

Tips:
1. move inline css rules to external css file.
2. separate style from html.

Nested Table

Excellent! No nested table is detected on this page (nested table : 0, total table : 0)

nested tables could slow down page rendering and lead to bad user experience.

Tips:
1. avoiding <table> for your page layout.
2. using <div> instead of <table>.

Plain Text Email

1 Email Address (b******@intel.com) was detected on this page.

Redirect Count

1 redirection was detected for loading this page.

Using HTTPS

Excellent! HTTPS is used for your page.

WWW Resolve

the websites http://www.brendangregg.com and http://brendangregg.com DOES NOT resolved to the same url.

Search Engines treat URLs with or without "www" as two different records.

Tips:
1. edit your .htaccess file and permanently redirect one to the other (eg redirect www.mysite.com to mysite.com).

IP Canonicalization

IP address of the site http://107.180.117.203 is forwarded to http://107.180.117.203/, instead of to its domain name site brendangregg.com.

URL Rewrite

Excellent! your urls are clean.

clean, short and relevant URLs are favoured by users and search engines

Tips:
1. use url rewrite to turn dynamic pages with query parameters into seo friendly static pages.
2. put your important keywords in the url.
3. good urls are not only user friendly but also seo friendly.

Underscore In URL

URLs with underscore
http://brendangregg.com/Slides/eBPFSummit2023_FastByFriday
http://brendangregg.com/Slide.../KernelRecipes2023_FastByFriday
http://brendangregg.com/Slide.../KernelRecipes2023_FastByFriday
http://brendangregg.com/Slide...nelRecipes2023_FastByFriday.pdf
http://brendangregg.com/Slides/YOW2022_flame_graphs
http://brendangregg.com/Slides/YOW2022_flame_graphs
http://brendangregg.com/Slides/YOW2022_flame_graphs.pdf
http://brendangregg.com/Slide...REcon2022_ComputingPerformance/
http://brendangregg.com/Slide...on2022_ComputingPerformance.pdf
http://brendangregg.com/Slides/YOW2021_ComputingPerformance
http://brendangregg.com/Slides/YOW2021_ComputingPerformance
http://brendangregg.com/Slide...OW2021_ComputingPerformance.pdf
http://brendangregg.com/Slide...telON2021_ProcessorBenchmarking
http://brendangregg.com/Slide...telON2021_ProcessorBenchmarking
http://brendangregg.com/Slide...N2021_ProcessorBenchmarking.pdf
http://brendangregg.com/Slide...BPF_performance_getting_started
http://brendangregg.com/Slide...BPF_performance_getting_started
http://brendangregg.com/Slide...performance_getting_started.pdf
http://brendangregg.com/Slide...erformance_getting_started_2021
http://brendangregg.com/Slide...erformance_getting_started_2021
http://brendangregg.com/Slide...rmance_getting_started_2021.pdf
http://brendangregg.com/Slides/LISA2021_ComputingPerformance
http://brendangregg.com/Slide...SA2021_ComputingPerformance.pdf
http://brendangregg.com/Slides/LISA2021_BPF_Internals
http://brendangregg.com/Slides/LISA2021_BPF_Internals.pdf
http://brendangregg.com/Slide...020_performance_getting_started
http://brendangregg.com/Slide...020_performance_getting_started
http://brendangregg.com/Slide...performance_getting_started.pdf
http://brendangregg.com/Slide...W2020_Linux_Systems_Performance
http://brendangregg.com/Slide...W2020_Linux_Systems_Performance
http://brendangregg.com/Slide...0_Linux_Systems_Performance.pdf
http://brendangregg.com/Slide...nt2019_BPF_Performance_Analysis
http://brendangregg.com/Slide...nt2019_BPF_Performance_Analysis
http://brendangregg.com/Slide...2019_BPF_a_new_type_of_software
http://brendangregg.com/Slide...2019_BPF_a_new_type_of_software
http://brendangregg.com/Slide..._BPF_a_new_type_of_software.pdf
http://brendangregg.com/Artic...An_introduction_to_bpftrace.pdf
http://brendangregg.com/Slide...A2019_Linux_Systems_Performance
http://brendangregg.com/Slide...A2019_Linux_Systems_Performance
http://brendangregg.com/Slide...9_Linux_Systems_Performance.pdf
http://brendangregg.com/Slides/LSFMM2019_BPF_Observability
http://brendangregg.com/Slides/LSFMM2019_BPF_Observability
http://brendangregg.com/Slide...LSFMM2019_BPF_Observability.pdf
http://brendangregg.com/Slides/SCALE2019_eBPF_Perf_Tools
http://brendangregg.com/Slides/SCALE2019_eBPF_Perf_Tools
http://brendangregg.com/Slides/SCALE2019_eBPF_Perf_Tools.pdf
http://brendangregg.com/Slides/YOW2018_CloudPerfRCANetflix
http://brendangregg.com/Slides/YOW2018_CloudPerfRCANetflix
http://brendangregg.com/Slide...YOW2018_CloudPerfRCANetflix.pdf
http://brendangregg.com/Slides/YOWCTO2018_Working_at_Netflix
http://brendangregg.com/Slides/YOWCTO2018_Working_at_Netflix
http://brendangregg.com/Slide...WCTO2018_Working_at_Netflix.pdf
http://brendangregg.com/Slide.../ATO2018_Linux_Performance_2018
http://brendangregg.com/Slide.../ATO2018_Linux_Performance_2018
http://brendangregg.com/Slide...2018_Linux_Performance_2018.pdf
http://brendangregg.com/Slides/LinkedIn2018_FlameScope
http://brendangregg.com/Slides/LinkedIn2018_FlameScope.pdf
http://brendangregg.com/Slides/NetConf_BPF_observability
http://brendangregg.com/Slides/NetConf_BPF_observability
http://brendangregg.com/Slides/NetConf_BPF_observability.pdf
http://brendangregg.com/Slides/Percona2018_Linux_Performance
http://brendangregg.com/Slides/Percona2018_Linux_Performance
http://brendangregg.com/Slide...rcona2018_Linux_Performance.pdf
http://brendangregg.com/Artic...Netflix_FlameScope_20180404.pdf
http://brendangregg.com/Slide...vent2017_performance_tuning_EC2
http://brendangregg.com/Slide...vent2017_performance_tuning_EC2
http://brendangregg.com/Slide...2017_performance_tuning_EC2.pdf
http://brendangregg.com/Artic...7_useful_bcc_BPF_perf_tools.pdf
http://brendangregg.com/Slide..._Container_Performance_Analysis
http://brendangregg.com/Slide..._Container_Performance_Analysis
http://brendangregg.com/Slide...tainer_Performance_Analysis.pdf
http://brendangregg.com/Slides/KernelRecipes_Perf_Events
http://brendangregg.com/Slides/KernelRecipes_Perf_Events
http://brendangregg.com/Slides/KernelRecipes_Perf_Events.pdf
http://brendangregg.com/Slide...uroBSDcon2017_SystemMethodology
http://brendangregg.com/Slide...uroBSDcon2017_SystemMethodology
http://brendangregg.com/Slide...SDcon2017_SystemMethodology.pdf
http://brendangregg.com/Slides/OSS2017_BPF_superpowers
http://brendangregg.com/Slides/OSS2017_BPF_superpowers
http://brendangregg.com/Slides/OSS2017_BPF_superpowers.pdf
http://brendangregg.com/Slides/SBSRE_perf_meetup_aug2017/#61
http://brendangregg.com/Slides/SBSRE_perf_meetup_aug2017/#61
http://brendangregg.com/Slides/SBSRE_perf_meetup_aug2017.pdf
http://brendangregg.com/Slide.../USENIX_ATC2017_BPF_superpowers
http://brendangregg.com/Slide.../USENIX_ATC2017_BPF_superpowers
http://brendangregg.com/Slide...NIX_ATC2017_BPF_superpowers.pdf
http://brendangregg.com/Slides/USENIX_ATC2017_flamegraphs
http://brendangregg.com/Slides/USENIX_ATC2017_flamegraphs
http://brendangregg.com/Slide.../USENIX_ATC2017_flamegraphs.pdf
http://brendangregg.com/Slides/Velocity2017_BPF_superpowers
http://brendangregg.com/Slides/Velocity2017_BPF_superpowers
http://brendangregg.com/Slide...elocity2017_BPF_superpowers.pdf
http://brendangregg.com/Slide...kerCon2017_performance_analysis
http://brendangregg.com/Slide...on2017_performance_analysis.pdf
http://brendangregg.com/Slides/SCALE2017_perf_analysis_eBPF
http://brendangregg.com/Slides/SCALE2017_perf_analysis_eBPF
http://brendangregg.com/Slide...CALE2017_perf_analysis_eBPF.pdf
http://brendangregg.com/Slides/IOVisor2017_bpftools
http://brendangregg.com/Slides/IOVisor2017_bpftools
http://brendangregg.com/Slides/IOVisor2017_bpftools.pdf
...

You have 278 Urls with underscore.

Search Engines treat hyphen as word separator, they do not treat underscore as word separator.

Tips:
1. use hyphen "-" instead of underscore "_" to optimize your page url.
2. help search engines to better understand your url, eventually will benefit your page`s ranking.

Links

Internal Links (link to pages within this domain)	External Links (link to pages on other websites)	Total
649	287	936

Too many links (936), it may be considered as spam!

Internal Links (link to pages within this domain) - 649
URL	Anchor Text
http://brendangregg.com/overview.html	Start Here
http://brendangregg.com/index.html	Homepage
http://brendangregg.com/blog/index.html	Blog
http://brendangregg.com/syste...rformance-2nd-edition-book.html	Sys Perf book
http://brendangregg.com/bpf-performance-tools-book.html	BPF Perf book
http://brendangregg.com/linuxperf.html	Linux Perf
http://brendangregg.com/ebpf.html	eBPF Tools
http://brendangregg.com/perf.html	perf Examples
http://brendangregg.com/methodology.html	Perf Methods
http://brendangregg.com/usemethod.html	USE Method
http://brendangregg.com/tsamethod.html	TSA Method
http://brendangregg.com/offcpuanalysis.html	Off-CPU Analysis
http://brendangregg.com/activebenchmarking.html	Active Bench.
http://brendangregg.com/wss.html	WSS Estimation
http://brendangregg.com/flamegraphs.html	Flame Graphs
http://brendangregg.com/heatmaps.html	Heat Maps
http://brendangregg.com/frequencytrails.html	Frequency Trails
http://brendangregg.com/colonygraphs.html	Colony Graphs
http://brendangregg.com/dtrace.html	DTrace Tools
http://brendangregg.com/dtracetoolkit.html	DTraceToolkit
http://brendangregg.com/dtkshdemos.html	DtkshDemos
http://brendangregg.com/guessinggame.html	Guessing Game
http://brendangregg.com/specials.html	Specials
http://brendangregg.com/books.html	Books
http://brendangregg.com/sites.html	Other Sites
http://brendangregg.com/syste...rformance-2nd-edition-book.html
http://brendangregg.com/syste...rformance-2nd-edition-book.html	Systems Performance 2nd Ed.
http://brendangregg.com/bpf-performance-tools-book.html
http://brendangregg.com/bpf-performance-tools-book.html	BPF Performance Tools book
http://brendangregg.com/blog/2024-10-29/ai-flame-graphs.html	AI Flame Graphs
http://brendangregg.com/blog/...07-22/no-more-blue-fridays.html	No More Blue Fridays
http://brendangregg.com/blog/...4-03-24/linux-crisis-tools.html	Linux Crisis Tools
http://brendangregg.com/blog/...turn-of-the-frame-pointers.html	The Return of the Frame Pointe...
http://brendangregg.com/blog/...024-03-10/ebpf-documentary.html	eBPF Documentary
http://brendangregg.com/blog/...04-28/ebpf-security-issues.html	eBPF Observability Tools Are N...
http://brendangregg.com/blog/...er-performance-future-2022.html	USENIX SREcon APAC 2022: Compu...
http://brendangregg.com/blog/...023-02-17/srecon-apac-2023.html	USENIX SREcon APAC 2023: CFP
http://brendangregg.com/blog/...022-05-02/brendan-at-intel.html	Brendan@Intel.com
http://brendangregg.com/blog/...2-04-15/netflix-farewell-1.html	Netflix End of Series 1
http://brendangregg.com/blog/...orflow-library-performance.html	TensorFlow Library Performance
http://brendangregg.com/blog/...022-03-19/why-dont-you-use.html	Why Don't You Use ...
http://brendangregg.com/blog/...21-09-26/the-speed-of-time.html	The Speed of Time
http://brendangregg.com/blog/...mysteriously-eating-my-cpu.html	ZFS Is Mysteriously Eating My ...
http://brendangregg.com/blog/...-08-30/high-rate-of-paging.html	Analyzing a High Rate of Pagin...
http://brendangregg.com/blog/...lack-crashes-secret-stderr.html	Slack's Secret STDERR Messages
http://brendangregg.com/blog/...performance-on-the-horizon.html	USENIX LISA2021 Computing Perf...
http://brendangregg.com/blog/...w-to-add-bpf-observability.html	How To Add eBPF Observability ...
http://brendangregg.com/blog/2021-06-15/bpf-internals.html	USENIX LISA2021 BPF Internals ...
http://brendangregg.com/blog/...06-04/an-unbelievable-demo.html	An Unbelievable Demo
http://brendangregg.com/blog/index.html	Blog index
http://brendangregg.com/blog/about.html	About
http://brendangregg.com/blog/rss.xml	RSS
http://brendangregg.com/appearance.html
http://brendangregg.com/blog/index.html	blog
http://brendangregg.com/bio.html	bio
http://brendangregg.com/antibio.html	anti-bio
http://brendangregg.com/#Documentation	Documentation
http://brendangregg.com/#Videos	Videos
http://brendangregg.com/#Software	Software
http://brendangregg.com/#Misc	Misc
http://brendangregg.com/overview.html	Overview
http://brendangregg.com/linuxperf.html	Linux Performance
http://brendangregg.com/blog/2024-10-29/ai-flame-graphs.html	AI Flame Graphs
http://brendangregg.com/blog/...4-03-24/linux-crisis-tools.html	Linux Crisis Tools
http://brendangregg.com/blog/...07-22/no-more-blue-fridays.html	No More Blue Fridays
http://brendangregg.com/blog/...turn-of-the-frame-pointers.html	The Return of the Frame Pointe...
http://brendangregg.com/blog/...024-03-10/ebpf-documentary.html	eBPF: Unlocking the Kernel
http://brendangregg.com/blog/...024-03-10/ebpf-documentary.html	blog
http://brendangregg.com/Slides/eBPFSummit2023_FastByFriday	eBPF Summit
http://brendangregg.com/Slide.../KernelRecipes2023_FastByFriday	Kernel Recipes
http://brendangregg.com/Slide.../KernelRecipes2023_FastByFriday	slides
http://brendangregg.com/Slide...nelRecipes2023_FastByFriday.pdf	PDF
http://brendangregg.com/blog/...04-28/ebpf-security-issues.html	eBPF Observability Tools Are N...
http://brendangregg.com/Slides/YOW2022_flame_graphs	Visualizing Performance: The D...
http://brendangregg.com/Slides/YOW2022_flame_graphs	slides
http://brendangregg.com/Slides/YOW2022_flame_graphs.pdf	PDF
http://brendangregg.com/blog/...er-performance-future-2022.html	Computing Performance: What's ...
http://brendangregg.com/Slide...REcon2022_ComputingPerformance/	slides
http://brendangregg.com/Slide...on2022_ComputingPerformance.pdf	PDF
http://brendangregg.com/Slides/YOW2021_ComputingPerformance	Computing Performance 2021: Wh...
http://brendangregg.com/Slides/YOW2021_ComputingPerformance	slides
http://brendangregg.com/Slide...OW2021_ComputingPerformance.pdf	PDF
http://brendangregg.com/Slide...telON2021_ProcessorBenchmarking	Processor Benchmarking
http://brendangregg.com/Slide...telON2021_ProcessorBenchmarking	slides
http://brendangregg.com/Slide...N2021_ProcessorBenchmarking.pdf	PDF
http://brendangregg.com/blog/...mysteriously-eating-my-cpu.html	ZFS Is Mysteriously Eating My ...
http://brendangregg.com/blog/...-08-30/high-rate-of-paging.html	Analyzing a High Rate of Pagin...
http://brendangregg.com/blog/...lack-crashes-secret-stderr.html	Slack's Secret STDERR Messages
http://brendangregg.com/Slide...BPF_performance_getting_started	Performance Wins with eBPF: Ge...
http://brendangregg.com/Slide...BPF_performance_getting_started	slides
http://brendangregg.com/Slide...performance_getting_started.pdf	PDF
http://brendangregg.com/Slide...erformance_getting_started_2021	Performance Wins with BPF: Get...
http://brendangregg.com/Slide...erformance_getting_started_2021	slides
http://brendangregg.com/Slide...rmance_getting_started_2021.pdf	PDF
http://brendangregg.com/blog/...performance-on-the-horizon.html	Computing Performance: On the ...
http://brendangregg.com/blog/...performance-on-the-horizon.html	blog
http://brendangregg.com/Slides/LISA2021_ComputingPerformance	slides
http://brendangregg.com/Slide...SA2021_ComputingPerformance.pdf	PDF
http://brendangregg.com/blog/...w-to-add-bpf-observability.html	How To Add eBPF Observability ...
http://brendangregg.com/blog/2021-06-15/bpf-internals.html	BPF Internals (eBPF)
...

External Links (link to pages on other websites) - 287
URL	Anchor Text
https://aus.social/@brendangregg	Mastodon
http://twitter.com/brendangregg	Twitter
https://www.youtube.com/watch?v=Wb_vD3XZYOA	youtube
https://www.youtube.com/watch?v=XudHNF4k_x0	youtube
https://www.youtube.com/watch?v=VMpTU15rIZY	youtube
https://www.youtube.com/watch?v=zGSQdN2X_k0	youtube
https://www.youtube.com/watch?v=-Y4pDLhqKI4	youtube
https://www.youtube.com/watch?v=bGAVrtb_tFs	youtube
https://www.facebook.com/atsc...leevents/videos/536868690830345	video
https://www.youtube.com/watch?v=5nN1wjA_S30	youtube
https://www.youtube.com/watch?v=_5Z2AU7QTH4	youtube
https://www.youtube.com/watch?v=wyfhjr_ufag	youtube
https://www.youtube.com/watch?v=_Lf-h5TDTN0	youtube
https://www.youtube.com/watch?v=16slh29iN1g	youtube
https://www.youtube.com/watch?v=7pmXdG8-7WU&feature=youtu.be	youtube
https:/opensource.com/article/19/8/introduction-bpftrace	An introduction to bpftrace fo...
https://www.youtube.com/watch?v=fhBHvsi0Ql0	youtube
https://lwn.net/Articles/787131/	lwn.net
https://youtu.be/P2hbiWTB2w4?t=158	youtube
https://www.youtube.com/watch?v=tAY8PnfrS_k	youtube
https://www.youtube.com/watch?v=EjFxLvv9_ao	youtube
https://youtu.be/ogEhUnQdQiU?t=1361	youtube
https://github.com/iovisor/bpftrace	repository
https://github.com/iovisor/bp...ter/docs/tutorial_one_liners.md	bpftrace one-liners tutorial
https://github.com/iovisor/bp.../master/docs/reference_guide.md	bpftrace reference guide
https://github.com/iovisor/bp...r/docs/internals_development.md	internals development guide
https://youtu.be/sV3XfrfjrPo?t=30m51s	youtube
https://medium.com/netflix-te...netflix-flamescope-a57ca19d47bb	Netflix FlameScope
https://www.youtube.com/watch?v=89fYOo1V2pA	youtube
https://opensource.com/article/17/11/bccbpf-performance	7 tools for analyzing performa...
https://www.youtube.com/watch?v=NYLXZ58EboM	youtube
https://www.youtube.com/watch?v=UVM3WX8Lq2k	youtube
https://www.youtube.com/watch?v=ay41Uq1DrvM	youtube
https://www.youtube.com/watch?v=i5Ml9uY2rBw	youtube
https://youtu.be/86Wj_-pWcwE?t=53m3s	meetup
https://www.youtube.com/watch?v=oc9000dM9-k	youtube
https://www.youtube.com/watch?v=D53T1Ejig1Q	youtube
https://www.youtube.com/watch?v=bj3qdEDbCD4	youtube
https://www.youtube.com/watch?v=bK9A5ODIgac	youtube
https://www.youtube.com/watch?v=w8nFRoFJ6EQ	youtube
https://www.youtube.com/watch?v=44nV6Mj11uw	youtube
https://www.youtube.com/watch?v=JRFNIKUROPE	youtube
https://www.youtube.com/watch?v=GsMs3n8CB6g	Give me 15 minutes and I'll ch...
https://www.youtube.com/watch?v=GsMs3n8CB6g	youtube demo
https://www.youtube.com/watch?v=UmOU3I36T2U&t=1151s	youtube talk
https://www.youtube.com/watch?v=uibLwoVKjec	youtube
https://github.com/iovisor/bcc/blob/master/docs/tutorial.md	end user tutorial
https://github.com/iovisor/bc...utorial_bcc_python_developer.md	Python developer tutorial
https://github.com/iovisor/bc.../master/docs/reference_guide.md	reference guide
https://youtu.be/eO94l0aGLCA?t=3m37s	youtube
https://www.youtube.com/watch?v=CbmEDXq7es0	video
http://cacm.acm.org/magazines...202665-the-flame-graph/abstract	The Flame Graph
http://queue.acm.org/detail.cfm?id=2927301	ACMQ
http://cacm.acm.org/magazines...202665-the-flame-graph/abstract	CACM
https://www.youtube.com/watch?v=zxCWXNigDpA	youtube
https://www.usenix.org/confer...on16/program/presentation/gregg	usenix
https://www.facebook.com/atsc...events/videos/1693888610884236/	video
https://www.youtube.com/watch?v=OPio8V-z03c	video
http://techblog.netflix.com/2...erformance-analysis-in-60s.html	Linux Performance Analysis in ...
https://www.infoq.com/presentations/broken-performance-tools	video
https://www.youtube.com/watch?v=BHA65BqlqSk	youtube
http://techblog.netflix.com/2015/07/java-in-flames.html	Java in Flames
https://vimeo.com/131484323	vimeo
https://www.youtube.com/watch...hdIMVi0o5RNrf8E2dUijvGpqKLB9TCR	youtube
https://www.youtube.com/watch?v=_Ik8oiQvWgo	youtube
https://www.youtube.com/watch?v=R4IKeMQhM0Y	youtube
https://www.usenix.org/confer...ence-program/presentation/gregg	USENIX
https://www.youtube.com/watch?v=7Cyd22kOqWc	youtube
https://www.youtube.com/watch?v=fMV1upo88Zw	youtube
https://www.youtube.com/watch?v=uvKMptfXtdo	youtube
https://wiki.freebsd.org/DTrace	DTrace on FreeBSD
https://wiki.freebsd.org/DTrace/One-Liners	one-liners
https://wiki.freebsd.org/DTrace/Tutorial	tutorial
https://www.youtube.com/watch?v=SN7Z0eCn0VY	youtube
https://www.youtube.com/watch...g&list=UU3S1jlPpZUyx8ND3KKPhPvw	youtube
http://www.youtube.com/watch?v=H-E0MQTID0g	youtube
https://www.theregister.com/2...on_readies_global_glory_reboot/	cloud-wide reboot
http://lwn.net	lwn.net
http://lwn.net/Articles/608497/	Ftrace: The Hidden Light Switc...
http://www.youtube.com/watch?v=6TYC5h4yz1o	youtube
https://www.usenix.org/system...les/login/articles/07_gregg.pdf	The Case of the Clumsy Kernel
http://www.youtube.com/watch?v=nZfNehCzGdw	youtube
http://www.youtube.com/watch?v=P3SGzykDE4Q	youtube
http://www.youtube.com/watch?v=VsQWSJgb1AE	youtube
http://www.youtube.com/watch?v=_EOvKUAwf8E	youtube
http://www.youtube.com/watch?v=0yyorhl6IjM	youtube
http://queue.acm.org/detail.cfm?id=2413037	Thinking Methodically about Pe...
http://cacm.acm.org/magazines...methodically-about-performance/	CACM
https://www.youtube.com/watch?v=abLan0aXJkw	youtube
http://www.youtube.com/watch?v=K9w2cipqfvc	youtube
http://www.youtube.com/watch?v=uZTMuXXFG38	youtube
http://www.youtube.com/watch?v=xkDqe6rIMa0	youtube
http://www.youtube.com/watch?...LB0197EF82791B1F3&v=RoTSNVuBpqg	youtube
http://www.dtracebook.com	DTrace book
http://www.youtube.com/watch?v=ml-t-9g6Mjc	youtube
http://cacm.acm.org/magazines...alizing-system-latency/fulltext	CACM
http://queue.acm.org/detail.cfm?id=1809426	Visualizing System latency
http://www.youtube.com/watch?v=cklPFJysUYM	youtube
https://docs.oracle.com/cd/E22471_01/pdf/820-4167.pdf	Sun ZFS Storage 7000 admin gui...
http://www.amazon.com/gp/prod...=399369&creativeASIN=0131568191	Solaris Performance and Tools
...

reasonable number of links (below 100) per page will give a better user experience.

Tips:
1. keep the number of links per page below 100.
2. having more than 100 links in a single page will lead to a bad user experience, and it possibly runs into the risk of been considered as spam.
3. search engines may not follow all the links if you have too many of them in a single page.

Images

Total Images	Alt Present	Alt Missing
5	0	5

Alt values are missing for all the images (5), it will be hard for search engines to include your site for image searches!

Image URL - 5
URL	ALT Text
http://brendangregg.com/Images/sysperf2nd_bookcover_360.jpg
http://brendangregg.com/Images/bpfperftools_bookcover_360.jpg
http://brendangregg.com/Images/brendan_rajasthan2011_thumb.jpg
http://brendangregg.com/Images/sysperf2nd_bookcover_360.jpg
http://brendangregg.com/Images/bpfperftools_bookcover_360.jpg

search engines cannot `see` images, proper Alt content will help them to better understand and index images.

Tips:
1. always add alt attributes to images. Alt is mandatory for accessibility and for valid XHTML.
2. words used within an image`s Alt attribute should be its text equivalent and convey the same information.
3. use a human-readable caption and descriptive text around the image.

CSS

Style Block In Same Page	Links to External Style Files	Total
1	1	2

You have 1 style blocks in the same file, try to put them in a separate file.

Links To External Stylesheet Files - 1
Stylesheet URL	rel	type
http://brendangregg.com/page.css	stylesheet

Script

Scripts Block In Same Page	Links to External Script Files	Total
2	1	3

You have 2 script blocks in the same file, try to put them in a separate file.

Links To External Script Files - 1
Script URL	Type
https://www.googletagmanager.com/gtag/js?id=G-SYD11KXST1

put scripts together and link them from an external files rather then put them in the same file as the main page.

Tips:
1. reduce the use of in-page scripts, put them in separate files and link them in.
2. reduce the number of external script files, it will help browser to make lesser number of http requests from the server.
3. optimize or compress the script files to have smaller size and faster loading.

Blog Or News Release

Link to Blog / News Release Page
http://brendangregg.com/blog/index.html	Blog
https://medium.com/netflix-te...netflix-flamescope-a57ca19d47bb	Netflix FlameScope

Excellent! we have found blog linked to your site.

Having a blog is a great way to provide fresh content and retain users, search engines favour it too.

Tips:
1. regularly update your blog and provide fresh and quality content.
2. relevant blogs of your website topics, generate more credits in the eyes of your visitors, as well as search engines.

DMOZ Listing

No

Your site is not listed in the DMOZ Open Directory. DMOZ Open Directory Project

Google Analytics

Analytics Service is not implemented for the site.

Social Media Integration

Excellent! your site is well integrated with social media networks.

Facebook Page	...ttps://www.facebook.com/atscaleevents/videos/536868690830345
Twitter Account	http://twitter.com/brendangregg
Google+ Page	Not Found

Trustworthiness

0

No Trustworthiness Score is calculated for the site.

0 - 19	20 - 39	40 - 59	60 - 79	80 - 100
0
Very Poor	Poor	Unsatisfactory	Good	Excellent

Users are concerned about the safety of their online transactions. Trustworthiness rating is based on real user ratings and that tells you how much other users trust this site, so do the serch engines. note: this trustworthiness score is provided by WOT (Web of Trust).

Tips:
1. pay attention to the look and design of your site, many people look for visual cues when assessing a site`s credibility
2. make your site easy to use, sites that are easy to navigate are perceived as being more trustworthy.
3. make it easy for user to contact you, users will be more comfortable and feel more secured shall they need to get in touch with you.

Child Safe

0 No Child Safe Score is calculated for the site.

0 - 19	20 - 39	40 - 59	60 - 79	80 - 100
0
Very Poor	Poor	Unsatisfactory	Good	Excellent

Safe Browsing

Safe! the site brendangregg.com is NOT currently listed as suspicious, most-likely it is clean from malware and phining code [ verify this by Google Safe Browsing ]

Ensure that your site is malware free and does not cause harm to users` computers.

Tips:
1. do not put virus, malicious worms, adwares, trojans, spywares and suspicious phishing code in your server.
2. take suspicious behaviours seriously, have a regular check-up and monitor closely of your server`s log files.
3. if your site is black-listed by Google as suspicious, clean it up before requesting for a review.

Traffic Rank

Your site is not among the most visited 1 million websites in the world.

Websites On Same Server

Excellent! You do have very few domains (1 - brendangregg.com) hosted on the same server as brendangregg.com (ip : 107.180.117.203).

Too many domains hosted on the same server is an indicator that you are not really serious about your website, and your site will have a higher chance to be surrounded by bad neighbours.

Tips:
1. the fewer domains hosted on the same server/ip the better.
2. avoid shared hosting whenever possible, especially when there are already hundreds or thousands of sites are hosted on the same server.
3. dedicated ip or resources for your site not only do good to your site visitors but also favoured by search engines.

Server Location

your server (IP : 107.180.117.203) is located at United States

ensure your server is not located far away from most of your site visitors.

HTTP Compression

No

your website server does not support HTTP Compression.

Caching

No

your website server does not support Caching.

Server Signature

Excellent! the website server signature is off.

A secure and safe server is not only good for your site visitors but also good for search engines.

Tips:
1. server software version information can be utilized by malicious visitors to attack your server.
2. by turning off the server signature, you actually have made your server a little bit more secure.
3. for Apache server - edit the apache2.conf or the .htaccess file to turn server signature off.

Domain Age

21 years, 131 days old ( 1st registered on : 2003-10-08 )

[ To check the detailed whois info, Use this Whois Lookup Tool ]

excellent, the domain age is old enough.

Domain Expires

2 years, 233 days from today ( expires on : 2027-10-08 )

[ To check the detailed whois info, Use this Whois Lookup Tool ]

domain is expiring soon.

Domain Info

brendangregg.com ( 16 characters )

Domain Registrar : GoDaddy.com, LLC

[ To check the detailed whois info, Use this Whois Lookup Tool ]

Domain Created On	Last Modified On	Expires On
2003-10-08	2024-10-01	2027-10-08
21 years, 131 days old	0 years, 137 days ago	2 years, 233 days from today

21 years, 131 days old

Domain Name Servers used by brendangregg.com
DNS Name	IP Address
ns11.domaincontrol.com	97.74.105.6
ns12.domaincontrol.com	173.201.73.6

Excellent! the Domain is of right length, easy to be remembered by visitors.

domain name choice and domain age are crucial for SEO.

Tips:
1. keep the domain name short and relevant to the content, which will be easier to be remembered and related to.
2. older domain tends to be more trustworthy.
3. register a domain for more than 1 year, and search engine will think it is a serious business.

brendangregg.com

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